Analysis

  • max time kernel
    136s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09/05/2024, 04:47

General

  • Target

    2024-05-09_3138aa61ebb74a9a1a5ca01a697076ee_cryptolocker.exe

  • Size

    70KB

  • MD5

    3138aa61ebb74a9a1a5ca01a697076ee

  • SHA1

    e151202b0d04ce2a1f62e9ffd1939ef7f877d45d

  • SHA256

    ffb7d3a4135a7202e51b5937226a2b851a6b1cc6e35a24f976962d3dce3aa2aa

  • SHA512

    23d6e55fdac83e2fc11a2841401473281f623edb095a4a9cb182a35206843b9477d996d6fe4f51b1f48b309eaf7513604b98f17bebd4e198d81806d793f4b9ce

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs99v:C4Q2c94OtEvwDpj4H8zU

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 3 IoCs
  • UPX dump on OEP (original entry point) 5 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 5 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\2024-05-09_3138aa61ebb74a9a1a5ca01a697076ee_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-09_3138aa61ebb74a9a1a5ca01a697076ee_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2072
    • 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:3104

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    71KB

    MD5

    a5aefd1d80008e1441102d204a218ecd

    SHA1

    c2a7f4629d9d95d6569aed458f3ced06f59f53f7

    SHA256

    0ea3d64f4b3480ee51d9859e9b73c72a4ee22268c4a1a286b720ce60df1efec8

    SHA512

    97650c8952adeaf7dedb539ebedb6ad8be3b2d62e3c38c660d858696688a2a28fd084b3da09ced7fa5f4d09c0cbf92edf7ae19268080639a38608f75ece4ec8f

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2072-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2072-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/2072-2-0x0000000001F80000-0x0000000001F86000-memory.dmp

    Filesize

    24KB

  • memory/2072-9-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/2072-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3104-21-0x0000000000650000-0x0000000000656000-memory.dmp

    Filesize

    24KB

  • memory/3104-27-0x0000000000630000-0x0000000000636000-memory.dmp

    Filesize

    24KB

  • memory/3104-19-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3104-52-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB