Analysis

  • max time kernel
    134s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-05-2024 15:46

General

  • Target

    2024-05-29_c907d0f1c56d902c27cff153ac1b9d9c_cryptolocker.exe

  • Size

    72KB

  • MD5

    c907d0f1c56d902c27cff153ac1b9d9c

  • SHA1

    0e1be5feff5adf5727e762ec9fa32ce9c4c31194

  • SHA256

    42d68c1acf1744aa2b1300fbaee2429a93067651740c5c890b6cf1af985d0d77

  • SHA512

    57e8ebcb53876f7eb353a5a623f179c994a2a5b2ddd34312e0a0a03ae798694fd3773c3af5be780cad06a1b0b8898b40d1fe88ba962b7fd39f30ba3973f1dbd4

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs97xw:C4Q2c94OtEvwDpj4H8zT

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\2024-05-29_c907d0f1c56d902c27cff153ac1b9d9c_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-29_c907d0f1c56d902c27cff153ac1b9d9c_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1988
    • 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:4784

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    72KB

    MD5

    a54b6cb9086e5fc8ce9167ccb5e600f8

    SHA1

    e83d236646e86685c90e21d374148aaf90a8d25d

    SHA256

    a3e70377fa2bc000b2317af7db853904acf4a71976a5b1fea2218b117183f43b

    SHA512

    9bf942b95802fe31410aae9c5f14b0491e11720e1b2ae073cbe53621a8d20048e4d08d383a50ae3cd818d8c2a40b761e8ed472373a69beb152c06ddcaeb70c0f

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1988-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1988-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/1988-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/1988-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/1988-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4784-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4784-20-0x00000000005D0000-0x00000000005D6000-memory.dmp

    Filesize

    24KB

  • memory/4784-26-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/4784-50-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB