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Analysis

  • max time kernel
    132s
  • max time network
    164s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/02/2024, 03:26

General

  • Target

    2024-02-03_241319cb2cdbb0efc6bcda4533ef75f1_cryptolocker.exe

  • Size

    58KB

  • MD5

    241319cb2cdbb0efc6bcda4533ef75f1

  • SHA1

    9746c1b658bf8c13f44e0818077f842c6fb0bc2c

  • SHA256

    e66f3fe9b82ca29a3a25c8db0cf1fb9dad11cef7525583085a90920d448c6e97

  • SHA512

    c73b2339926a63e190d87ea907d324becbf3e98103de9725dbb0aec27a15f9363d2ba9a0eae8d0085e21d0207a9b3a46594f0666902eda85f785cfff01365c72

  • SSDEEP

    768:UEEmoQDj/xnMp+yptndwe/PWQtOOtEvwDpjIm8lB4dCOBy/cMFqeoYPO+lxnxZ:ZzFbxmLPWQMOtEvwDpj38lD/cMAT+lBf

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-02-03_241319cb2cdbb0efc6bcda4533ef75f1_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-03_241319cb2cdbb0efc6bcda4533ef75f1_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2580
    • 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:3660

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    58KB

    MD5

    91984a5c351237164ca08ea7a80021fa

    SHA1

    558fb150ebb8b324e15e3e5a178d5271090cc864

    SHA256

    7accf79ff4742bef58bb648b22f8d8e467b932accfec86354d4c61ffca917555

    SHA512

    10337ca1a8bdb79f140815caa840684978ac99f3419a1e2520a7379ae067d70d254e3352268de212bd07eb7199c3fba3e42b57257478a52377eee678693a0208

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2580-0-0x00000000004E0000-0x00000000004E3000-memory.dmp

    Filesize

    12KB

  • memory/2580-1-0x0000000000630000-0x0000000000636000-memory.dmp

    Filesize

    24KB

  • memory/2580-2-0x0000000000630000-0x0000000000636000-memory.dmp

    Filesize

    24KB

  • memory/2580-3-0x0000000000650000-0x0000000000656000-memory.dmp

    Filesize

    24KB

  • memory/2580-24-0x00000000004E0000-0x00000000004E3000-memory.dmp

    Filesize

    12KB

  • memory/3660-17-0x0000000000630000-0x0000000000636000-memory.dmp

    Filesize

    24KB

  • memory/3660-19-0x00000000021E0000-0x00000000021E6000-memory.dmp

    Filesize

    24KB

  • memory/3660-20-0x0000000002100000-0x0000000002106000-memory.dmp

    Filesize

    24KB