Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-05-2024 02:37

General

  • Target

    2024-05-23_a14971857ddb76929a2813a9dd417b69_cryptolocker.exe

  • Size

    55KB

  • MD5

    a14971857ddb76929a2813a9dd417b69

  • SHA1

    0f177cc3affc13687e109acd8ac0aab8a70cdd12

  • SHA256

    b2e4c0bf5300551384617ac57f2d526ed7950d55bf507009fd78559b48da1fb2

  • SHA512

    e8ba2dec0c7ea79af86534719d16c2058492e2964c600ceaeef59bc4daba2dc08d57ff3ffd68609566aa0261bd8ba46e0db23a2183c550c5be6c209c9d0055fe

  • SSDEEP

    768:lQz7yVEhs9+4uR1bytOOtEvwDpjWfbP/bmq:lj+VGMOtEvwDpjubXbmq

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • Detects executables built or packed with MPress PE compressor 4 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-23_a14971857ddb76929a2813a9dd417b69_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-23_a14971857ddb76929a2813a9dd417b69_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1424
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies system certificate store
      PID:3660

Network

MITRE ATT&CK Matrix ATT&CK v13

Defense Evasion

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Modify Registry

1
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\misid.exe
    Filesize

    56KB

    MD5

    d590c1f7a36966597f1be21ce5d73b51

    SHA1

    3d826eccc34f7ca4f60afacbb44d346fe4bd4293

    SHA256

    9b345a68647bb4acf67273cbe80d8f2c5c53f19a1244cf477754241fd4f69269

    SHA512

    e5eb43f5320262c6e381cff5cf2a20d4d040ee9baaca46f228bcab97864ebba8709cfc3d62cf792aa85af368bacc467bd02eecbd1d1dd99a923869adc15bcd30

  • C:\Users\Admin\AppData\Local\Temp\misids.exe
    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1424-0-0x0000000000500000-0x0000000000510000-memory.dmp
    Filesize

    64KB

  • memory/1424-1-0x00000000004D0000-0x00000000004D6000-memory.dmp
    Filesize

    24KB

  • memory/1424-2-0x00000000004F0000-0x00000000004F6000-memory.dmp
    Filesize

    24KB

  • memory/1424-9-0x00000000004D0000-0x00000000004D6000-memory.dmp
    Filesize

    24KB

  • memory/1424-17-0x0000000000500000-0x0000000000510000-memory.dmp
    Filesize

    64KB

  • memory/3660-19-0x00000000005D0000-0x00000000005D6000-memory.dmp
    Filesize

    24KB

  • memory/3660-25-0x00000000005B0000-0x00000000005B6000-memory.dmp
    Filesize

    24KB

  • memory/3660-48-0x0000000000500000-0x0000000000510000-memory.dmp
    Filesize

    64KB