Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/05/2024, 05:16

General

  • Target

    2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe

  • Size

    55KB

  • MD5

    cd09f70ca2ec941e1d2f9558041fdf4d

  • SHA1

    c36c6f46c42a3900b0b179e03be82657106f0d36

  • SHA256

    90f9f4038be6bc33eb3cb19aca8767dd0c19421d4db190bc8bc111b5805ba1f9

  • SHA512

    c4447e3ddd7de4420a944a6f0bb8dd66d727288b433b6f7c08f75e80f9c8445b9bdf4126d4732138bc29ea2b6c5b1c5ca03021281e183661c0afe99fd62eb97a

  • SSDEEP

    768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjl9x:bP9g/xtCS3Dxx0w

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 2 IoCs
  • UPX dump on OEP (original entry point) 2 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 2 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\2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4040
    • C:\Users\Admin\AppData\Local\Temp\gewos.exe
      "C:\Users\Admin\AppData\Local\Temp\gewos.exe"
      2⤵
      • Executes dropped EXE
      PID:2600

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    55KB

    MD5

    0b41282d7a93103841964da13dd44153

    SHA1

    5c107c919067ff4c8aec7a0f0aac7ed0c7a5d227

    SHA256

    e18f13867818a6a60538c642064a62cdc8e3cf8ddeec9df2d56ae02643758063

    SHA512

    2220f3f52a3da074a9ca6c5c563991a73cbf603449c5f22b698d6d1211a06c42c27d68a6978581e2a00d31eb50a86156ebe9043aa865f1c22b923d442424498d

  • memory/2600-26-0x0000000002010000-0x0000000002016000-memory.dmp

    Filesize

    24KB

  • memory/4040-0-0x0000000000400000-0x000000000040E000-memory.dmp

    Filesize

    56KB

  • memory/4040-1-0x0000000002200000-0x0000000002206000-memory.dmp

    Filesize

    24KB

  • memory/4040-2-0x0000000000400000-0x0000000000406000-memory.dmp

    Filesize

    24KB

  • memory/4040-9-0x0000000002200000-0x0000000002206000-memory.dmp

    Filesize

    24KB