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Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/01/2024, 12:38

General

  • Target

    2024-01-28_76324d9a531f0692e61d805efb265085_cryptolocker.exe

  • Size

    80KB

  • MD5

    76324d9a531f0692e61d805efb265085

  • SHA1

    2143f1017b99d63a2ed332e2e648707a06466905

  • SHA256

    c83729f157c88f74c52c2cb93a4d665be1300f565b0f6d1f9459997d599e706c

  • SHA512

    251be0d0b6d6cce2d7195aeeaac61ee68ae2e09589a130f09e840d4a9b883ad737177a1d8b8dded6245d1a2fe25b181fd7fdae0a0fa26c2a288d1e09b140e0ec

  • SSDEEP

    1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdWa:T6a+rdOOtEvwDpjNt9

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 1 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-28_76324d9a531f0692e61d805efb265085_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-28_76324d9a531f0692e61d805efb265085_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3748
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:2052

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    80KB

    MD5

    510a08cd34ed958d1a810c5fb0b2094e

    SHA1

    19b44e4ddaddee07adcd8da0b83ecbad7b5498c0

    SHA256

    25959f242a4ae72572e7d9d6618389df3f742875ec088c8d5da42633d8a4fa68

    SHA512

    4fb53b0be3d30a076b82dc811ee23e090235601a0a984ea81a874eb2e5bfa409e3a0bf408c308cbf6080c645619009c1187d42b1144ed2d26f664bad64c281ac

  • memory/2052-19-0x0000000000750000-0x0000000000756000-memory.dmp

    Filesize

    24KB

  • memory/2052-25-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB

  • memory/2052-26-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3748-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3748-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

    Filesize

    24KB

  • memory/3748-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/3748-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/3748-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB