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Analysis

  • max time kernel
    137s
  • 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
    18/03/2024, 18:43

General

  • Target

    2024-03-18_ca1978a5827778677c7891a7d73fa8e7_cryptolocker.exe

  • Size

    80KB

  • MD5

    ca1978a5827778677c7891a7d73fa8e7

  • SHA1

    7bca40a89577497c4b09af79323ea7aea0073bcb

  • SHA256

    df175b8409d19a32403cdf2dcc5924287363548c10091ffe3a71487732f4833e

  • SHA512

    6a5fab086570a0deb60d30a06e612eff62e88e1319a4bb2ff65f3372814598813f67f2ccd4daf62ed29f6a9f4d569a5619d7f6c9207dc888af6b41d77e5c4572

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2EMMAF:TCjsIOtEvwDpj5HE/OUHnSMi

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 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
  • 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\2024-03-18_ca1978a5827778677c7891a7d73fa8e7_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-18_ca1978a5827778677c7891a7d73fa8e7_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2876
    • 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:876

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    81KB

    MD5

    a23e181c0ab80f7042858fe474252c34

    SHA1

    6fa67d7a47f30a559628b1fc3681ff810fd218f4

    SHA256

    4585008f61800dfd2b61264830b228b137b6cccfe2b89e32492bcc21ad8a8087

    SHA512

    9c1bc7a139bed53beadf1cb90c386c44380d044266f486eb4de188f6297785d66519b292629ed5133261ff09186474037414ba9f6ea562c57b67bc4dfbd494c2

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/876-47-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/2876-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/2876-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/2876-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/2876-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/2876-17-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB