Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-01-2024 17:28

General

  • Target

    2024-01-25_59796b548d643ef5532ecd1138966f74_cryptolocker.exe

  • Size

    115KB

  • MD5

    59796b548d643ef5532ecd1138966f74

  • SHA1

    bdb3d3c1c43109a53627514b73b15b585008d1a6

  • SHA256

    ac1e4a9ba6ee34f32645634e2f85aa362a95c522526ec64bca2bb1b7d8a750a2

  • SHA512

    b2630cc6025e1fdcc67e1698aff334184a209e3c13470fb08f9220d1999f1e50da6f3ff250b47aec7dc512107fcbe07e0a3b6ec8caeb95ddbc990c1a7a3c3f82

  • SSDEEP

    1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp01f:z6a+CdOOtEvwDpjczN

Score
10/10

Malware Config

Signatures

  • Kinsing

    Kinsing is a loader written in Golang.

  • 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\2024-01-25_59796b548d643ef5532ecd1138966f74_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-25_59796b548d643ef5532ecd1138966f74_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3076
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:4320

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    115KB

    MD5

    9685c6b3c0d52e023521f4f42776c0f5

    SHA1

    9192a25a6b2f326850743a46475a72dad3f0d6c3

    SHA256

    e806ff77d92cffdd4871f261a006d6aa4f3e69cfb3b794333e22ec8104d60d2e

    SHA512

    e7657f18cf763e6be2b5e6985de253c028e0b7470b21c7f91054c8917b9bafe7457adcf9c32fb72ddb85f5e4ec1c9eebb7e46fb01e66a2f2b5b7677d13a51fe1

  • memory/3076-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3076-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3076-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/3076-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3076-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4320-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4320-20-0x00000000005C0000-0x00000000005C6000-memory.dmp

    Filesize

    24KB

  • memory/4320-26-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/4320-27-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB