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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
    19/02/2024, 15:55

General

  • Target

    2024-02-19_bde4c220ef924e3755ffe1d9281cd31a_cryptolocker.exe

  • Size

    93KB

  • MD5

    bde4c220ef924e3755ffe1d9281cd31a

  • SHA1

    76c90546bb64cd9010014a6ce2e8a56e35ba6d53

  • SHA256

    009218b51dfc7cc3235c3f8a10cb74e2e29a2b134db83ab76fca109421fbf658

  • SHA512

    349f19fd49011f37768d6457319e79fe516cd34d6ef9097f7b07507ea2bc6fbcb94a10ed325dbdf06617a9a46246c8e6b703cb5691c28a5124d09849eb7f7776

  • SSDEEP

    1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpYM:AnBdOOtEvwDpj6ze

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • UPX dump on OEP (original entry point) 5 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 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-02-19_bde4c220ef924e3755ffe1d9281cd31a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-19_bde4c220ef924e3755ffe1d9281cd31a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4892
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:3748

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    93KB

    MD5

    ee06d11a9e11420f467c02b7f9ad7784

    SHA1

    014e1339b5cc5405ca5e643863484e6824acc3cf

    SHA256

    675098a01bee4d62beca2d41a48aea519f7327e354c036b9578244c636a8f118

    SHA512

    c8cc6b6e285273ad9b09a298269a3cf5a8da6e4fd9be8dc934d26d90a1270d66e23e32cad62de56f6145525d44f8ab5d0b3a816a22ce39228c81cf6827d2871c

  • memory/3748-18-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3748-20-0x0000000000510000-0x0000000000516000-memory.dmp

    Filesize

    24KB

  • memory/3748-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3748-27-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4892-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4892-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/4892-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/4892-3-0x0000000000600000-0x0000000000606000-memory.dmp

    Filesize

    24KB

  • memory/4892-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB