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Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/03/2024, 11:02

General

  • Target

    2024-03-19_9a7a40a9732eb9cc131ccab75c090774_cryptolocker.exe

  • Size

    57KB

  • MD5

    9a7a40a9732eb9cc131ccab75c090774

  • SHA1

    43e3db31fdd26365fff117656061956f024f9f2a

  • SHA256

    a85435407c14de447db3a39040332eb53e98b4cfc6b00d9930599dab639dc0a5

  • SHA512

    85259198010545ea6742dcf54dfaf36531820fcc01d186c8abfc9dacb113ae801e398b8e068db8e670cf0ccbe35269e6d5ed5a3d640161d319c884c4145af876

  • SSDEEP

    768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5ax8iHS:z6QFElP6n+gKmddpMOtEvwDpj9aYa9S

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\2024-03-19_9a7a40a9732eb9cc131ccab75c090774_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-19_9a7a40a9732eb9cc131ccab75c090774_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1624
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:3904

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    57KB

    MD5

    79c224241689f0dcb55d9e72305819d8

    SHA1

    e6fc3cb28d9103b310a2f3149f9257aa8e38785a

    SHA256

    ce5a2775dbea632eea86bce34c7ef740feeec71824b415d8dcec46afaa368cc1

    SHA512

    c82ff6269e3e481a1615290743770f36d2ceff7893590d4a915dbc0c765975b93763e21e1a50a23e0e1a3621a4b2a84d004fa41decd6c0b01719098a38e23554

  • memory/1624-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1624-1-0x0000000000670000-0x0000000000676000-memory.dmp

    Filesize

    24KB

  • memory/1624-2-0x0000000000670000-0x0000000000676000-memory.dmp

    Filesize

    24KB

  • memory/1624-3-0x0000000002080000-0x0000000002086000-memory.dmp

    Filesize

    24KB

  • memory/1624-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3904-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3904-20-0x00000000005C0000-0x00000000005C6000-memory.dmp

    Filesize

    24KB

  • memory/3904-24-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/3904-27-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB