Analysis

  • max time kernel
    95s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/03/2024, 20:36

General

  • Target

    2024-03-18_89577382013fcec91f8f5f5f92e7462e_cryptolocker.exe

  • Size

    68KB

  • MD5

    89577382013fcec91f8f5f5f92e7462e

  • SHA1

    18ec62ac4d4cc1e1013cf2fbb0fcc3169ce3f823

  • SHA256

    9cf824c908db50df16b67fee3238c66f2b816b792ba984f821616d7b3a7f8ea1

  • SHA512

    ab4324fb57e17660b315e5a252da52867a1b1e273d08e61cec34d4f8bab2356e3f5dadda8c97bdb3423d28c15dc25f3119bf44a63264c3f7447de864bc5deb45

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9x:C4Q2c94OtEvwDpj4H8zo

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 IoCs
  • UPX dump on OEP (original entry point) 4 IoCs
  • Checks computer location settings 2 TTPs 2 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).

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-03-18_89577382013fcec91f8f5f5f92e7462e_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-18_89577382013fcec91f8f5f5f92e7462e_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3464
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies system certificate store
      PID:4352

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    68KB

    MD5

    b2991084086899349f7330c903bad211

    SHA1

    a857bcc7b4b45c63b5408bc2e613513a6581ec69

    SHA256

    74712dc3b3798438389418bb0e052d31edb5b5c0308c73dcbdc21ee4a7eba807

    SHA512

    f663eaa8036d36ab3ca33e6f9da71d21e8451a0dfb129d26fc8aad253521b01d01108bf14749657a823d1a5b51af0358ac603fab55839d5b4f8869132b3c5a7e

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3464-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3464-1-0x00000000021A0000-0x00000000021A6000-memory.dmp

    Filesize

    24KB

  • memory/3464-2-0x00000000021A0000-0x00000000021A6000-memory.dmp

    Filesize

    24KB

  • memory/3464-3-0x00000000021C0000-0x00000000021C6000-memory.dmp

    Filesize

    24KB

  • memory/3464-16-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4352-19-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/4352-22-0x00000000021E0000-0x00000000021E6000-memory.dmp

    Filesize

    24KB

  • memory/4352-48-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB