Analysis

  • max time kernel
    139s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-05-2024 02:35

General

  • Target

    2024-05-22_616793b5b559223bfe9895bd287f215d_cryptolocker.exe

  • Size

    38KB

  • MD5

    616793b5b559223bfe9895bd287f215d

  • SHA1

    a5f30df2848a138fd6a34bed7961e051be1029c4

  • SHA256

    b3b17d1295687faebf3c022e64421a44f85ee7975a152ef7508372e1e3395c4a

  • SHA512

    5d8eab074841257ff554f69b75d78e54030cd9086c32c983b41648198b3b0d1e1df0625b1971c7c97fdfc361bd5227c9bfd8e6af890182a2fffd323966f8a2ff

  • SSDEEP

    768:fTz7y3lhsT+hs1SQtOOtEvwDpjfAu9+4qa8:fT+hsMQMOtEvwDpjoIH/8

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 1 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\2024-05-22_616793b5b559223bfe9895bd287f215d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-22_616793b5b559223bfe9895bd287f215d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1692
    • 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:2904

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

    38KB

    MD5

    f7bb0f022a50da3e535f304172dec2f6

    SHA1

    8af5ff8dd5e7b7b3841d5d27f3af84e5d180a334

    SHA256

    a6ed817cd039ae4a54438d3bdc7f35b2bde39ee70bbbef96067907152a30234b

    SHA512

    513aa658e4d7cb3083a90d55e5a2868a99e28cf9360a420efa181ed0b68598a98275fdd4ac2364295b8b1c5e2f69a3b25daf598c5c5e8321e028d94a03890d9f

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

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1692-0-0x0000000000730000-0x0000000000736000-memory.dmp
    Filesize

    24KB

  • memory/1692-1-0x0000000000750000-0x0000000000756000-memory.dmp
    Filesize

    24KB

  • memory/1692-7-0x0000000000730000-0x0000000000736000-memory.dmp
    Filesize

    24KB