Analysis

  • max time kernel
    88s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-02-2024 07:23

General

  • Target

    2024-02-03_0e2ceb5456631d9a650a3bfbd84c590a_cryptolocker.exe

  • Size

    61KB

  • MD5

    0e2ceb5456631d9a650a3bfbd84c590a

  • SHA1

    4dc4d12c6426fade6d749cd790f9aded209fb9f4

  • SHA256

    deb786a9214ae30dda3a493c220427ba5b786485db615be2ce1f981e1a5994ad

  • SHA512

    1b3d9f3406511b18eabff160b75515a60e962241f4932e983d8163a3a853ad277509f274f198ebae965c3a153cccd67258194ed741490ee2fe109cf83705f917

  • SSDEEP

    768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7yBEY9Su8F5mnVh4L:zj+soPSMOtEvwDpj4kpmeLmng

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\2024-02-03_0e2ceb5456631d9a650a3bfbd84c590a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-03_0e2ceb5456631d9a650a3bfbd84c590a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4784
    • 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:884

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    62KB

    MD5

    c278f02b71856d6b6e39bd75a64de1f4

    SHA1

    3907e4509b280faaf6f1b8c609e01ab45359807f

    SHA256

    80de3e45ed2b5d553398164683e66f230de3e1d65a502835823e46e2a6530e41

    SHA512

    43c5a40cf5d28eaa4ffff165a86297666b2f2270ac2fa5ecaf8c84308a1c10517e227b0b9a5ae6b6440f05a9465d70aafaff8ea549d79cb6024902dd40c1b35b

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/884-19-0x0000000001F70000-0x0000000001F76000-memory.dmp

    Filesize

    24KB

  • memory/884-25-0x0000000001F50000-0x0000000001F56000-memory.dmp

    Filesize

    24KB

  • memory/884-48-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4784-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4784-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4784-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4784-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/4784-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB