Analysis

  • max time kernel
    149s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-05-2024 00:47

General

  • Target

    2024-05-23_b876cd727c1dbee10d3c3cf81d23fe3a_cryptolocker.exe

  • Size

    48KB

  • MD5

    b876cd727c1dbee10d3c3cf81d23fe3a

  • SHA1

    ef01cba2464be24cf7c1f7d12f1d6e5b0022e900

  • SHA256

    e69be6a577ff3b475c7714d898175af9dcc55bb041c5d854a8a8119ea3545ceb

  • SHA512

    a33b96f9e84d034c8ec71e24c4ab728b1e9e2ad94232786f86df9a54d61bbd9eb4505e3c10d5d9f3fb5982ef69565990a80fad37279a16372fca9e7ba1197ddc

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4/Uth8igNrr42A7n0FmB0n3:vj+jsMQMOtEvwDpj5HczerLO04Bs

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\2024-05-23_b876cd727c1dbee10d3c3cf81d23fe3a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-23_b876cd727c1dbee10d3c3cf81d23fe3a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4612
    • 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:2960

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

    48KB

    MD5

    7fb8be8b1fe4989eee011718c1aef559

    SHA1

    e5b14bfae63dcd01dfd9efe77abd1fa9b51d8c87

    SHA256

    9d9caa60ed2e95a7692af6c77dcd01f0087e182151ee94831fded18cabbac482

    SHA512

    1db83bd066f174ca30d373be533559757bd2b603d3a18b58f54580c891295b18df0cd120644adf9e07469078ce54b2a863ab576bb0858b4448ca40baecf1da05

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

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2960-17-0x00000000005D0000-0x00000000005D6000-memory.dmp
    Filesize

    24KB

  • memory/2960-23-0x00000000005A0000-0x00000000005A6000-memory.dmp
    Filesize

    24KB

  • memory/4612-0-0x00000000021D0000-0x00000000021D6000-memory.dmp
    Filesize

    24KB

  • memory/4612-1-0x00000000021D0000-0x00000000021D6000-memory.dmp
    Filesize

    24KB

  • memory/4612-2-0x0000000002070000-0x0000000002076000-memory.dmp
    Filesize

    24KB