Analysis

  • max time kernel
    133s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-05-2024 03:26

General

  • Target

    2024-05-04_2a239a39517a0645a7be12a1ef6f02eb_cryptolocker.exe

  • Size

    72KB

  • MD5

    2a239a39517a0645a7be12a1ef6f02eb

  • SHA1

    f7c8e73d176369947dbee54a79afc55d8dff2bae

  • SHA256

    18703721f358a6d3ada2ab93338e4a948b8a0a0d5dae9ab7321711230505e430

  • SHA512

    b784733692b8f665bf81a42eb3a723ab919e34a98d42e3cb229f26af483711051d908c519c96e6b4f8b5a260d448be0d40a0035b92184b358808b3a993f650b0

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs95:C4Q2c94OtEvwDpj4H8zo

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 3 IoCs
  • UPX dump on OEP (original entry point) 5 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 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).

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-04_2a239a39517a0645a7be12a1ef6f02eb_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-04_2a239a39517a0645a7be12a1ef6f02eb_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3276
    • 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:3936

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    72KB

    MD5

    bc5218a5ea4a7e8bde2f8f09a2c40d45

    SHA1

    aaf40467a6b5402453013ce2e8bb059394f37049

    SHA256

    f18cb7148625b09ad087e9fddcfa32e02db183f61d6668a6a74f513190047484

    SHA512

    8148bd590037a48fd1df162ad144a5400830aff274d951ea59cc1aa2848d11781f7ee533d6ff51c509ef5504d2c1d898e0e16810cc577e2c20d1751746fac136

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3276-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3276-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/3276-4-0x0000000000510000-0x0000000000516000-memory.dmp

    Filesize

    24KB

  • memory/3276-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/3276-19-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3936-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3936-21-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/3936-22-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB

  • memory/3936-51-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB