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Analysis

  • max time kernel
    121s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    04/02/2024, 01:44

General

  • Target

    2024-02-04_cf6dcae11e693e59b5001cd4a96cb431_cryptolocker.exe

  • Size

    82KB

  • MD5

    cf6dcae11e693e59b5001cd4a96cb431

  • SHA1

    b171a79147a493b8f4f6995ac5ddf59539e8c4d1

  • SHA256

    b85e28dcf094060295e9f01ecb1bc7fefa79106be612f236d8a8c1435d48b677

  • SHA512

    f197f10914a4de883ac3dc1e5c0e3dbe2c90e77a90d6a1701c9de3af134edfcb016179c25e481cdef1e0c31f2af48c2f8faf3acfa6c8f7f8ebc3e2985b486fab

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1kyJS1nQ:zCsanOtEvwDpjW

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
  • 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\2024-02-04_cf6dcae11e693e59b5001cd4a96cb431_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-04_cf6dcae11e693e59b5001cd4a96cb431_cryptolocker.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2256
    • 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:2724

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\Cab9B86.tmp

    Filesize

    65KB

    MD5

    ac05d27423a85adc1622c714f2cb6184

    SHA1

    b0fe2b1abddb97837ea0195be70ab2ff14d43198

    SHA256

    c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

    SHA512

    6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

  • C:\Users\Admin\AppData\Local\Temp\Tar9C25.tmp

    Filesize

    171KB

    MD5

    9c0c641c06238516f27941aa1166d427

    SHA1

    64cd549fb8cf014fcd9312aa7a5b023847b6c977

    SHA256

    4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f

    SHA512

    936ed0c0b0a7ff8e606b1cc4175a1f9b3699748ccbba1c3aff96203033d2e9edabf090e5148370df42fbfc4e31d7229493706ff24f19ff42ff7bef74a6baad06

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

    Filesize

    82KB

    MD5

    49ec1bd8219f64b91d857e5ce8394b3f

    SHA1

    3c043757c5ae8fdc09ba22c3d290c690d620a1fc

    SHA256

    41603ad14ce38fd0d82cdccfad0a319398fc897f3ee6fa781050e061fe94a4aa

    SHA512

    e988fca4f152f2385a2df67661b90975fd27eac4bf7423ad0c954742198ac9eaa6277eea731eb3496e59ddd55da16b452444fe0d444d0efd82c0007cfcbbc370

  • memory/2256-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

    Filesize

    24KB

  • memory/2256-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2256-3-0x0000000000300000-0x0000000000306000-memory.dmp

    Filesize

    24KB

  • memory/2256-2-0x00000000002C0000-0x00000000002C6000-memory.dmp

    Filesize

    24KB

  • memory/2256-14-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2724-16-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2724-19-0x0000000000370000-0x0000000000376000-memory.dmp

    Filesize

    24KB

  • memory/2724-18-0x0000000000240000-0x0000000000246000-memory.dmp

    Filesize

    24KB

  • memory/2724-91-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB