Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/05/2024, 11:38

General

  • Target

    2024-05-03_b101b6f3541cc5cc4db53e1b27f094fd_cryptolocker.exe

  • Size

    38KB

  • MD5

    b101b6f3541cc5cc4db53e1b27f094fd

  • SHA1

    d0df3dfc75f5af36dde98229c163a072f28e4850

  • SHA256

    36e41a9cfebdae8b8ba11002e09bc298010b6513bb95ba67f4ea52386c10000a

  • SHA512

    7e79b6d44a8151d8dcc1abd67208a862390d7f9901ebf97471364f4beecec7f9e2ff474e8729da2f05924faa73719765f080c47e5bd582b4a02fc4c88e957808

  • SSDEEP

    768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYan8T:qDdFJy3QMOtEvwDpjjWMl7Tdn8T

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\2024-05-03_b101b6f3541cc5cc4db53e1b27f094fd_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-03_b101b6f3541cc5cc4db53e1b27f094fd_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1060
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:1756

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    39KB

    MD5

    ac146ef11919004852e0ad0288067a8a

    SHA1

    33e8319dddcf21b1db80edcda6dbe4ce55f72d15

    SHA256

    5a10e50fba5fb39485e40ebdf1263843045e1c05cecfaae341cef98e15e46308

    SHA512

    0c65b4496639b486b00326a2553512a189c3c21a5343285fa59059cece8ca4af01560271ea209d32e5230d816fb4053b0544111bc4c6270ecb5e61ded33db6d2

  • memory/1060-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1060-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/1060-2-0x0000000000760000-0x0000000000766000-memory.dmp

    Filesize

    24KB

  • memory/1060-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/1060-19-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1756-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1756-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/1756-27-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/1756-28-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB