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Analysis

  • max time kernel
    117s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    04/02/2024, 15:39

General

  • Target

    2024-02-04_ef8dcedf8c1c3c8a8bcbf006bf9d49d6_cryptolocker.exe

  • Size

    56KB

  • MD5

    ef8dcedf8c1c3c8a8bcbf006bf9d49d6

  • SHA1

    1aaaca642343a965c4d8625455ec1885c0c15818

  • SHA256

    5aa0e1a665bd7fc0313363fe0879de6be733b88b41432a95673cbd0f9f79e550

  • SHA512

    66202676cfac7d1e4f8ad57077d7bb0563921f25b63accfb1870dcca4ca1add0656a1c973f94868affb033aaf77a865a3872c3c1266adb0f66e9ed2834996a28

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZgBh8i6g7Goi20Pb3:xj+VGMOtEvwDpjubEgV20D3

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • Detects executables built or packed with MPress PE compressor 5 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • 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_ef8dcedf8c1c3c8a8bcbf006bf9d49d6_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-04_ef8dcedf8c1c3c8a8bcbf006bf9d49d6_cryptolocker.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1956
    • 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:2792

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\Cab69CD.tmp

    Filesize

    65KB

    MD5

    ac05d27423a85adc1622c714f2cb6184

    SHA1

    b0fe2b1abddb97837ea0195be70ab2ff14d43198

    SHA256

    c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

    SHA512

    6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

  • C:\Users\Admin\AppData\Local\Temp\Tar6A2D.tmp

    Filesize

    171KB

    MD5

    9c0c641c06238516f27941aa1166d427

    SHA1

    64cd549fb8cf014fcd9312aa7a5b023847b6c977

    SHA256

    4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f

    SHA512

    936ed0c0b0a7ff8e606b1cc4175a1f9b3699748ccbba1c3aff96203033d2e9edabf090e5148370df42fbfc4e31d7229493706ff24f19ff42ff7bef74a6baad06

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

    Filesize

    56KB

    MD5

    9331fd5a7be042fe4e7b8e2954909d74

    SHA1

    ebd9a37b8dd410979c715828f486dd83bc40b687

    SHA256

    710b606d9c6629e07998fedf2218c59dd6dcf72a94bb04f6201d56189ba16d18

    SHA512

    a484cd06f82dad5cd544e90a419af5daec11760838631388f3da33b49e6e781d598a155301076ac96e16dd0915813a37392a235d51c8e0d3cb5e77577480f4d9

  • memory/1956-14-0x0000000001DD0000-0x0000000001DE0000-memory.dmp

    Filesize

    64KB

  • memory/1956-4-0x0000000000240000-0x0000000000246000-memory.dmp

    Filesize

    24KB

  • memory/1956-15-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1956-1-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1956-2-0x0000000000370000-0x0000000000376000-memory.dmp

    Filesize

    24KB

  • memory/1956-0-0x0000000000240000-0x0000000000246000-memory.dmp

    Filesize

    24KB

  • memory/1956-91-0x0000000001DD0000-0x0000000001DE0000-memory.dmp

    Filesize

    64KB

  • memory/2792-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2792-19-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/2792-20-0x00000000004B0000-0x00000000004B6000-memory.dmp

    Filesize

    24KB

  • memory/2792-90-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB