Analysis

  • max time kernel
    120s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    12-02-2024 20:16

General

  • Target

    2024-02-12_b79a4e75df2da2815132a6cbaf923cfb_cryptolocker.exe

  • Size

    80KB

  • MD5

    b79a4e75df2da2815132a6cbaf923cfb

  • SHA1

    87a5f71ae9bf8b3a0460834ab931d206e4976186

  • SHA256

    41418def11f5b00dd2d4d4e70798f5c9d5dd92c41db66043d1354697b770deb2

  • SHA512

    7ee549311b2eb6e98f02eb0046148cf9a7e00c035ec4394aeee8dce5acb7ff3895d82235b33fe705ac459992ae49f56cfaad1c376bcce2d8a3ea6d157fee6f67

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1ky2fs:zCsanOtEvwDpj6

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\2024-02-12_b79a4e75df2da2815132a6cbaf923cfb_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-12_b79a4e75df2da2815132a6cbaf923cfb_cryptolocker.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2412
    • 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:2696

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\Cab4B54.tmp

    Filesize

    65KB

    MD5

    ac05d27423a85adc1622c714f2cb6184

    SHA1

    b0fe2b1abddb97837ea0195be70ab2ff14d43198

    SHA256

    c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

    SHA512

    6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

  • C:\Users\Admin\AppData\Local\Temp\Tar4B96.tmp

    Filesize

    171KB

    MD5

    9c0c641c06238516f27941aa1166d427

    SHA1

    64cd549fb8cf014fcd9312aa7a5b023847b6c977

    SHA256

    4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f

    SHA512

    936ed0c0b0a7ff8e606b1cc4175a1f9b3699748ccbba1c3aff96203033d2e9edabf090e5148370df42fbfc4e31d7229493706ff24f19ff42ff7bef74a6baad06

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

    Filesize

    81KB

    MD5

    a1d8bed4f268aab3c3000b5fb9ea465a

    SHA1

    dd6dd4a4d91c78acb613b312a75b9b50633e2c0e

    SHA256

    b3552345f58c9aa780b59799ae00063189e1a7f96ab6c24862cd75a37d0d54bb

    SHA512

    558bd7cf2c62ebaba45a80050698829a32e5fd9f36e78ab6a45c6b38fa4790f9a71ac81a386445ff702465f51b9bfd1cd293cac3626c68ac23148ddd57f3da57

  • memory/2412-1-0x0000000000480000-0x0000000000486000-memory.dmp

    Filesize

    24KB

  • memory/2412-2-0x00000000004B0000-0x00000000004B6000-memory.dmp

    Filesize

    24KB

  • memory/2412-9-0x0000000000480000-0x0000000000486000-memory.dmp

    Filesize

    24KB

  • memory/2412-15-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2412-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2412-14-0x0000000002800000-0x0000000002810000-memory.dmp

    Filesize

    64KB

  • memory/2696-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2696-21-0x0000000000420000-0x0000000000426000-memory.dmp

    Filesize

    24KB

  • memory/2696-19-0x00000000004A0000-0x00000000004A6000-memory.dmp

    Filesize

    24KB

  • memory/2696-92-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB