Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/04/2024, 11:41

General

  • Target

    2024-04-05_322e5b915f05d1dc858836295505b724_cryptolocker.exe

  • Size

    93KB

  • MD5

    322e5b915f05d1dc858836295505b724

  • SHA1

    15237687cf67f9c58cd35aa832710c8cf91f170d

  • SHA256

    32f0b8a9410d3e58537830fda504f4aaded14167e52b0806db4c4c9bf613c5ee

  • SHA512

    dd95f6cb1b47be8ccb49f0b7406b2eb9d235519b72cf443e9231985edf8fc0a681adbbc99280325341090310007a7c70062c7034b9b939ab6477ed2dee709b76

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDjgx/D:zCsanOtEvwDpjBD

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 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\2024-04-05_322e5b915f05d1dc858836295505b724_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-05_322e5b915f05d1dc858836295505b724_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2204
    • 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:2244

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    93KB

    MD5

    cfe2f629b93fbff7ab8b21bc6ca660ff

    SHA1

    e841696fa784e10a813335dae15cf48515b27c7a

    SHA256

    b392b28e1bc2119825fc568ca0030abd609dbc3503927f24338cf6c26d19cccf

    SHA512

    b1db191bfc5778e549c08973db10a28738c1b3ce2fc5dcf3320c0042944301136e294dac291394b8ce129e2749f96c95dbd1eb0d42d403e4018b2fa7a4288eb0

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2204-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2204-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/2204-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/2204-3-0x00000000007D0000-0x00000000007D6000-memory.dmp

    Filesize

    24KB

  • memory/2204-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2244-19-0x0000000002070000-0x0000000002076000-memory.dmp

    Filesize

    24KB

  • memory/2244-25-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/2244-48-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB