Analytics Alerts

Browse the Cortex analytics alert reference.

Severity ▾
Detection module ▾
Data source ▾

10 alerts match the current filters. technique: T1027 ✕

Download CSV Show ATT&CK heatmap
  • A process was executed with a command line obfuscated by Unicode character substitution Medium

    A process was executed with a command line obfuscated by Unicode character substitution.

    Activation:
    14 Days
    Training:
    30 Days
    Test:
    N/A (single event)
    Deduplication:
    6 Hours
    ATT&CK tactics: Defense Evasion (TA0005)
    ATT&CK techniques: Obfuscated Files or Information (T1027)
    Required data: XDR Agent
    Attacker's goals: Hide its action and avoid detection.
    Investigative actions: Check whether the executing process is benign and if this was a desired behavior as part of its normal execution flow.
  • Encoded information using Windows certificate management tool Medium

    Encoding/decoding to/from using certutil.exe could be used to evade detection.

    Activation:
    14 Days
    Training:
    30 Days
    Test:
    N/A (single event)
    Deduplication:
    1 Day
    ATT&CK tactics: Defense Evasion (TA0005)
    ATT&CK techniques: Obfuscated Files or Information: Encrypted/Encoded File (T1027.013) Deobfuscate/Decode Files or Information (T1140)
    Required data: XDR Agent
    Attacker's goals: Evade detection by executing processes with obfuscated arguments.
    Investigative actions: Check encoded/decoded command content and see whether it is benign or malicious.
  • Globally uncommon high entropy module was loaded Informational 1 variation

    A module with high entropy and a globally uncommon hash was loaded.

    Activation:
    14 Days
    Training:
    30 Days
    Test:
    N/A (single event)
    Deduplication:
    1 Day
    ATT&CK tactics: Defense Evasion (TA0005)
    ATT&CK techniques: Obfuscated Files or Information (T1027)
    Required data: XDR Agent
    Attacker's goals: Adversaries may attempt to make an executable difficult to discover or analyze by compressing, encrypting, encoding, or otherwise obfuscating its contents.
    Investigative actions: Check if the module is either compressed, encrypted, obfuscated or packed.

    Variations

    Globally uncommon high entropy module was loaded by process which was executed by a scheduled task

    Low overridden

    A module with high entropy and a globally uncommon hash was loaded. overridden

  • Globally uncommon high entropy process was executed Informational 3 variations

    A process with high entropy and a globally uncommon hash was executed.

    Activation:
    14 Days
    Training:
    30 Days
    Test:
    N/A (single event)
    Deduplication:
    1 Day
    ATT&CK tactics: Defense Evasion (TA0005)
    ATT&CK techniques: Obfuscated Files or Information (T1027)
    Required data: XDR Agent
    Attacker's goals: Adversaries may attempt to make an executable difficult to discover or analyze by compressing, encrypting, encoding, or otherwise obfuscating its contents.
    Investigative actions: Check if the process' file is either compressed, encrypted, obfuscated or packed.

    Variations

    Globally uncommon high entropy process was executed by a web server process or CGO

    Low overridden

    A process with high entropy and a globally uncommon hash was executed by a web server process or CGO. overridden

    Globally uncommon high entropy process was extracted from an internet-downloaded archive and executed

    Low overridden

    A process with high entropy and a globally uncommon hash was extracted from an internet-downloaded archive and executed. overridden

    Globally uncommon high entropy process was downloaded from an uncommon source and executed

    Low overridden

    A process with high entropy and a globally uncommon hash was downloaded from an uncommon source and executed. overridden

  • Possible binary padding using dd Informational

    A suspicious dd command ran and added data to a binary. This may indicate binary padding to change the hash of a file.

    Activation:
    14 Days
    Training:
    30 Days
    Test:
    N/A (single event)
    Deduplication:
    1 Hour
    ATT&CK tactics: Defense Evasion (TA0005)
    ATT&CK techniques: Obfuscated Files or Information: Binary Padding (T1027.001)
    Required data: XDR Agent
    Attacker's goals: An adversary may use binary padding to avoid hash-based blacklists and static antivirus signatures.
    Investigative actions: Check the padded file and try to understand the impact of padding this specific binary.
  • Possible malicious .NET compilation started by a commonly abused process Medium

    Attackers may use csc.exe to compile payloads on a compromised machine.

    Activation:
    14 Days
    Training:
    30 Days
    Test:
    N/A (single event)
    Deduplication:
    1 Day
    ATT&CK tactics: Defense Evasion (TA0005)
    ATT&CK techniques: Obfuscated Files or Information: Compile After Delivery (T1027.004)
    Required data: XDR Agent
    Attacker's goals: Compile payloads on the host to evade detection.
    Investigative actions: Investigate the payload being compiled. Check whether the executing process is benign and if this was a desired behavior as part of its normal execution flow.
  • Suspicious data encryption Low

    Known applications were used to encrypt data within a machine's local file system.

    Activation:
    14 Days
    Training:
    30 Days
    Test:
    N/A (single event)
    Deduplication:
    1 Day
    ATT&CK tactics: Impact (TA0040) Defense Evasion (TA0005)
    ATT&CK techniques: Data Encrypted for Impact (T1486) Obfuscated Files or Information: Encrypted/Encoded File (T1027.013)
    Required data: XDR Agent
    Attacker's goals: Damage or hide data on the local file system.
    Investigative actions: Check if the action was done using an automation service. Check if there are any other suspicious activities originated from the same machine/executing user.
  • Uncommon AppleScript containing a potential obfuscation technique was executed Low 2 variations

    The AppleScript interpreter process was executed with an obfuscation technique in the command line.

    Activation:
    14 Days
    Training:
    30 Days
    Test:
    N/A (single event)
    Deduplication:
    1 Day
    ATT&CK tactics: Execution (TA0002) Defense Evasion (TA0005)
    ATT&CK techniques: Command and Scripting Interpreter: AppleScript (T1059.002) Obfuscated Files or Information: Command Obfuscation (T1027.010)
    Required data: XDR Agent
    Detector tags: AppleScript Analytics, Evasion Analytics
    Attacker's goals: Evade defenses and impede forensics by encrypting, encoding, or obfuscating payloads at rest or in transit.
    Investigative actions: Analyze the command line and determine whether it performs any malicious or suspicious actions. Check the events generated by the process or its children for potential malicious behavior. Verify the legitimacy of the persistence mechanism being created or modified.

    Variations

    Uncommon AppleScript containing a potential obfuscation technique was executed subsequently running a shell command

    Medium overridden

    The AppleScript interpreter process was executed with an obfuscation technique in the command line. overridden

    Uncommon AppleScript containing a potential obfuscation technique was executed by an uncommon parent process

    High overridden

    The AppleScript interpreter process was executed with an obfuscation technique in the command line. overridden

  • Unicode RTL Override Character High

    An attacker may use a special right-to-left (RTL) override character to trick users into executing malicious files that look like benign file types.

    Activation:
    14 Days
    Training:
    30 Days
    Test:
    N/A (single event)
    Deduplication:
    1 Day
    ATT&CK tactics: Defense Evasion (TA0005)
    ATT&CK techniques: Obfuscated Files or Information (T1027)
    Required data: XDR Agent
    Attacker's goals: Trick users into executing malicious files by making their file types seem benign.
    Investigative actions: Investigate the executed process. There is no reason for benign files to contain the Unicode right-to-left override character in their name.
  • Unusual use of a 'SysInternals' tool Informational 3 variations

    An attacker may be trying to avoid detection by using an obfuscated copy of SysInternals tools.

    Activation:
    14 Days
    Training:
    30 Days
    Test:
    N/A (single event)
    Deduplication:
    1 Day
    ATT&CK tactics: Defense Evasion (TA0005)
    ATT&CK techniques: Obfuscated Files or Information (T1027)
    Required data: XDR Agent with eXtended Threat Hunting (XTH)
    Attacker's goals: Attackers may leverage SysInternals tools for lateral movement, credential access, or to delete recovery backups to cause impact.
    Investigative actions: Check if the file is familiar to the user, if not, investigate further the source of it.

    Variations

    Unusual use of a 'SysInternals' tool by a process with an invalid or non-standard signature

    High overridden

    An attacker may be trying to avoid detection by using an obfuscated copy of SysInternals tools. overridden

    Unusual use of a 'SysInternals' tool that can be used for offensive operations

    High overridden

    An attacker may be trying to avoid detection by using an obfuscated copy of SysInternals tools. overridden

    A registry key related to SysInternals was modified by a known registry editor

    Informational overridden

    A registry key related to SysInternals was modified by a known registry editor to circumvent a EULA prompt. overridden