Analysis

  • max time kernel
    120s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    25-01-2024 17:32

General

  • Target

    2024-01-25_862fb7858e5217ad87827bb6960c81e2_cryptolocker.exe

  • Size

    77KB

  • MD5

    862fb7858e5217ad87827bb6960c81e2

  • SHA1

    923405e570b8fa5c84ea79a3b118bd3e2d53cce0

  • SHA256

    e2090f410d4cca626001c53199a367bb00d12fcfbcd48722f806f5cdd5f62255

  • SHA512

    3bcb49fe3bfc547d7f7f0fa65c866e83b0d44ebabead165a13ac339b29af7e5441189878debdc23b96d27043c132296d79ed44cd189dd4b387270ef8f272d674

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1ky7Q5:zCsanOtEvwDpjd

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 6 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • UPX dump on OEP (original entry point) 6 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 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).

  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-25_862fb7858e5217ad87827bb6960c81e2_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-25_862fb7858e5217ad87827bb6960c81e2_cryptolocker.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1316
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Executes dropped EXE
      • Modifies system certificate store
      PID:2216

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\Cab40F8.tmp

    Filesize

    65KB

    MD5

    ac05d27423a85adc1622c714f2cb6184

    SHA1

    b0fe2b1abddb97837ea0195be70ab2ff14d43198

    SHA256

    c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

    SHA512

    6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

  • C:\Users\Admin\AppData\Local\Temp\Tar4214.tmp

    Filesize

    171KB

    MD5

    9c0c641c06238516f27941aa1166d427

    SHA1

    64cd549fb8cf014fcd9312aa7a5b023847b6c977

    SHA256

    4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f

    SHA512

    936ed0c0b0a7ff8e606b1cc4175a1f9b3699748ccbba1c3aff96203033d2e9edabf090e5148370df42fbfc4e31d7229493706ff24f19ff42ff7bef74a6baad06

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

    Filesize

    77KB

    MD5

    6401654b2b89b9be078e81f70a936c57

    SHA1

    38c12f94305530d1b2b6dcbac48256758b11af3a

    SHA256

    9616e2cf396283d3d3877c2f28489fcbf5df3685ac906d862c643e37d9e0e1d4

    SHA512

    b138bfa3815705f064e051f8e006b54be4e213e2917a315ac71253bfe7d5cef4d88bbbbc1f894c6bc76667fed9587dd1f63db8f747da3caa4dc2d43871cd1a52

  • memory/1316-2-0x0000000000470000-0x0000000000476000-memory.dmp

    Filesize

    24KB

  • memory/1316-1-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1316-15-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1316-14-0x0000000002480000-0x0000000002490000-memory.dmp

    Filesize

    64KB

  • memory/1316-3-0x0000000000240000-0x0000000000246000-memory.dmp

    Filesize

    24KB

  • memory/1316-0-0x0000000000240000-0x0000000000246000-memory.dmp

    Filesize

    24KB

  • memory/1316-92-0x0000000002480000-0x0000000002490000-memory.dmp

    Filesize

    64KB

  • memory/2216-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2216-19-0x00000000002F0000-0x00000000002F6000-memory.dmp

    Filesize

    24KB

  • memory/2216-91-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB