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Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09/05/2024, 18:36

General

  • Target

    2024-05-09_5987848d4f12dbc1af847e8710507f9a_cryptolocker.exe

  • Size

    80KB

  • MD5

    5987848d4f12dbc1af847e8710507f9a

  • SHA1

    dc8c2c6261dd0ee7ebac3977fd830c388c98c58b

  • SHA256

    ec8814f17a5c354f529d3014f347b014dd18f3d53e6353fc3b689e673e974f50

  • SHA512

    a38a244ae8dadafb2c6d1f89c401f5e0e0e4b16f7703314bc4f9cf0a565e5561e23e78a9ee70758c3804429c0f8f81adc8f39e7cbe8aca49f6f17f917acec98d

  • SSDEEP

    1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdM:T6a+rdOOtEvwDpjNt2

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • UPX dump on OEP (original entry point) 5 IoCs
  • Checks computer location settings 2 TTPs 1 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-09_5987848d4f12dbc1af847e8710507f9a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-09_5987848d4f12dbc1af847e8710507f9a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4856
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:3780

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    81KB

    MD5

    416f6b4b829b6122d92caf97c82ae2c9

    SHA1

    e645c3b5d1fb6f09a1882cea6524efa60a389f85

    SHA256

    0677dc62a9b854038e6e0cd6ffefaca1155fd766714d3b1641a4129dec9b5167

    SHA512

    03203927635b60d78daa32d3a7d64261b44876549bd519fc0b4ddd5f59a4c4946f3156fa43ca2ce894f7fe7a4ea863fdfd31fc0334b5103c2dc419482dc872ed

  • memory/3780-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/3780-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3780-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3780-27-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4856-0-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/4856-1-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4856-2-0x00000000007D0000-0x00000000007D6000-memory.dmp

    Filesize

    24KB

  • memory/4856-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/4856-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB