Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-05-2024 00:46

General

  • Target

    2024-05-23_b21adf64e5ab8ba778e443d019029f2d_cryptolocker.exe

  • Size

    71KB

  • MD5

    b21adf64e5ab8ba778e443d019029f2d

  • SHA1

    76fe392e64bd21a74a68e61f7c8fccfa92dfe7e0

  • SHA256

    43387156f45f26aa521906bb50b6e3e7b33609cfa2a66c679f4412003890802d

  • SHA512

    b0aac561cf6fd1c3b2efc4d6d8bf74adc71ecc4a7ba7e000ca1330de06716b7aa5cee78d08e63129c92293dafadc9c54655ca959e81f1a94ae39a6f9e86280dd

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4ZPsED3VK2+ZtyOjgO4r9vFAg2rq2g1B/Rm:vj+jsMQMOtEvwDpj5HZYTjipvF24u

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 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\2024-05-23_b21adf64e5ab8ba778e443d019029f2d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-23_b21adf64e5ab8ba778e443d019029f2d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2412
    • 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:4020

Network

MITRE ATT&CK Matrix ATT&CK v13

Defense Evasion

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Modify Registry

1
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

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

    72KB

    MD5

    eaad78eef9bd8c87611247883e5984cb

    SHA1

    6c7d73843fed911ef2b662152fcb184a4b5da65c

    SHA256

    a26bdc66cd8c9504b5ca01c25e77ea08538cf067068dce9600b0462222f20015

    SHA512

    525e09982e8041f72181ac48b76d18e08fee678091ca2aac095dc4a6433247d211e6d3b7ed8c9d06bc6cd63ecfa2983b933f8d51c59b73485aafe177501ca002

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

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2412-0-0x00000000004D0000-0x00000000004D6000-memory.dmp
    Filesize

    24KB

  • memory/2412-1-0x00000000004F0000-0x00000000004F6000-memory.dmp
    Filesize

    24KB

  • memory/2412-8-0x00000000004D0000-0x00000000004D6000-memory.dmp
    Filesize

    24KB

  • memory/4020-17-0x0000000000490000-0x0000000000496000-memory.dmp
    Filesize

    24KB

  • memory/4020-18-0x00000000005E0000-0x00000000005E6000-memory.dmp
    Filesize

    24KB