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Analysis

  • max time kernel
    111s
  • max time network
    96s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/09/2024, 23:53

General

  • Target

    23b641e5eecec19208e2c8d9d0a7871a2fdb2ef285c639af1c172468ad4a31b5N.exe

  • Size

    84KB

  • MD5

    09b4f0afd517a3d0def55563be233e90

  • SHA1

    40f1ca57a69abb9d149efc87b189bb6ddf87eb8c

  • SHA256

    23b641e5eecec19208e2c8d9d0a7871a2fdb2ef285c639af1c172468ad4a31b5

  • SHA512

    85b4f954d9d08ffb7ffc493e5bc8a7e94390c180883e4068455552caa1e2a34997912391ebc502c31da18e618fce3fb54bdd6c13bc7b41915330a5e265211988

  • SSDEEP

    1536:bDcWLfIbgEp10gyXVdtnTHNWnnn622222K:bDXL0n0gyXVd1re2222K

Malware Config

Signatures

  • Sets file to hidden 1 TTPs 1 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • Indicator Removal: File Deletion 1 TTPs

    Adversaries may delete files left behind by the actions of their intrusion activity.

  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\23b641e5eecec19208e2c8d9d0a7871a2fdb2ef285c639af1c172468ad4a31b5N.exe
    "C:\Users\Admin\AppData\Local\Temp\23b641e5eecec19208e2c8d9d0a7871a2fdb2ef285c639af1c172468ad4a31b5N.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3152
    • C:\Windows\SysWOW64\attrib.exe
      attrib +a +s +h +r C:\Windows\Debug\wmahost.exe
      2⤵
      • Sets file to hidden
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Views/modifies file attributes
      PID:472
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\23B641~1.EXE > nul
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3620
  • C:\Windows\Debug\wmahost.exe
    C:\Windows\Debug\wmahost.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Checks processor information in registry
    PID:416

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\debug\wmahost.exe

    Filesize

    84KB

    MD5

    a4a3c314a468e2c14605ba45af966f36

    SHA1

    f18ba359a52c74267181fd4077865c5d5a88d8cc

    SHA256

    e57fc10220b8ec288f9a9014be2e77830f587f70df55f781a8e9273fb05ba019

    SHA512

    533b0271f98915787e73c5ebe75403688cb6b1ad2a82a0dfa25922cd0cec0c69652f500d02ee40d93036146fb1f575efd061b27e9766d4c817397610448227cd

  • memory/416-6-0x0000000000400000-0x0000000000410000-memory.dmp

    Filesize

    64KB

  • memory/3152-0-0x0000000000400000-0x0000000000410000-memory.dmp

    Filesize

    64KB

  • memory/3152-5-0x0000000000400000-0x0000000000410000-memory.dmp

    Filesize

    64KB