Analysis

  • max time kernel
    146s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05-04-2024 02:30

General

  • Target

    2024-04-05_229a96b392e83396ae359a918436179b_cryptolocker.exe

  • Size

    92KB

  • MD5

    229a96b392e83396ae359a918436179b

  • SHA1

    8a6aac0c3451f3f91b8dd3430318d47b9c779e95

  • SHA256

    1cff34991671713dd71af5feb47184943013710cee93833d7ddcabd56891a52e

  • SHA512

    067946a146db11e389cddc836d789b667e273f07ad5f66d96eab9f122f705b1666d51552daa544b71cac3ef5e84e2452cd7ffb5ad695b535b72aabc7e67c419b

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDjhWt:zCsanOtEvwDpj9

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • UPX dump on OEP (original entry point) 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
  • UPX packed file 4 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • 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\2024-04-05_229a96b392e83396ae359a918436179b_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-05_229a96b392e83396ae359a918436179b_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4980
    • 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:4156

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    92KB

    MD5

    8f20ebaf3247dcd6d6775cba4747dbb8

    SHA1

    098f142b2c3a917834de1bed22fe5267c89d4336

    SHA256

    9e45c31b4f932bc034a0a308a583b852eba802b3681b7361c31e31eba5f43fb0

    SHA512

    8f50bd86681729d8e52dd0101c882da8419fa14f06ef16136399c2d6b2ad04dd328aebbeb7de76f8c0aca8c5f7f95b8b68f3d65f3027c5ece25a6cc6027ed4d9

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/4156-19-0x0000000001F30000-0x0000000001F36000-memory.dmp

    Filesize

    24KB

  • memory/4156-21-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/4156-48-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4980-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4980-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/4980-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/4980-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/4980-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB