Analysis

  • max time kernel
    142s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14-02-2024 00:33

General

  • Target

    2024-02-14_3d1db5f5c7bec9a0882e2c3ae862bc73_cryptolocker.exe

  • Size

    63KB

  • MD5

    3d1db5f5c7bec9a0882e2c3ae862bc73

  • SHA1

    4eed6a67c1b49654c677bd16cd024a66b6cba125

  • SHA256

    3b64ea6d0df068567d2cf56920c5a9037dc3df592707568a931e88755a6d7ce0

  • SHA512

    c77295b093b1224194248b08de64c5942d0118827be43ca93a6fc304edb92541d093e37ce3930afe082498bff6aae4e626c35f426b8474b95363051ddebc57f6

  • SSDEEP

    768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqPOYRmNxt5I52kGEO10Km9i:6j+1NMOtEvwDpjr8ox8UDEy0Kmk

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • Detects executables built or packed with MPress PE compressor 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
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies system certificate store 2 TTPs 7 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-02-14_3d1db5f5c7bec9a0882e2c3ae862bc73_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-14_3d1db5f5c7bec9a0882e2c3ae862bc73_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3280
    • 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:2196

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    63KB

    MD5

    0d88b0fa755be6e169f05729c74b9342

    SHA1

    c55cbe0992a95f9b54d5605140ea17ad047a8ff7

    SHA256

    740e77058f35eaad6d3eaca051ae5a586112ab5f5e22fc3a242b3b306a1743bf

    SHA512

    19c59040eb356833e6227a3806fa97128d7d1cf8ed32a4e574aeffc89d1db51e03d2b22f2ae0357f8c26b87af2e4c2e27ff5077746406da77e4b351327dada48

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2196-19-0x0000000000670000-0x0000000000676000-memory.dmp

    Filesize

    24KB

  • memory/2196-22-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/2196-50-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3280-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3280-1-0x0000000000830000-0x0000000000836000-memory.dmp

    Filesize

    24KB

  • memory/3280-2-0x0000000000830000-0x0000000000836000-memory.dmp

    Filesize

    24KB

  • memory/3280-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/3280-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB