Analysis

  • max time kernel
    117s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    06/03/2024, 00:33

General

  • Target

    2024-03-06_61038d922c70729ccdef0d8a65e5b0c0_cryptolocker.exe

  • Size

    102KB

  • MD5

    61038d922c70729ccdef0d8a65e5b0c0

  • SHA1

    66d2ca3a749ab88256146f8ffa81f64e95525795

  • SHA256

    07a948d3d8e4c2a18b69f8972ccaa4c829c094e37c2aae7654bd4a636bf47381

  • SHA512

    90db9124f3ec99b820c6d9c5e91ea3a6ad63bb8b24c7eff8d0e70fa7d3ac3089c40d3bc6d3c3607632c3a81527e83719d5d99582eabaca6ed54784984be9adfe

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZ7uyA36S7MpxRiWNa9mktJHlv/k2mwVek:xj+VGMOtEvwDpjubwQEIiVmkxv/yk

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\2024-03-06_61038d922c70729ccdef0d8a65e5b0c0_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-06_61038d922c70729ccdef0d8a65e5b0c0_cryptolocker.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2208
    • 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:2100

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

    Filesize

    67KB

    MD5

    753df6889fd7410a2e9fe333da83a429

    SHA1

    3c425f16e8267186061dd48ac1c77c122962456e

    SHA256

    b42dc237e44cbc9a43400e7d3f9cbd406dbdefd62bfe87328f8663897d69df78

    SHA512

    9d56f79410ad0cf852c74c3ef9454e7ae86e80bdd6ff67773994b48ccac71142bcf5c90635da6a056e1406e81e64674db9584928e867c55b77b59e2851cf6444

  • C:\Users\Admin\AppData\Local\Temp\Tar5181.tmp

    Filesize

    175KB

    MD5

    dd73cead4b93366cf3465c8cd32e2796

    SHA1

    74546226dfe9ceb8184651e920d1dbfb432b314e

    SHA256

    a6752b7851b591550e4625b832a393aabcc428de18d83e8593cd540f7d7cae22

    SHA512

    ce1bdd595065c94fa528badf4a6a8777893807d6789267612755df818ba6ffe55e4df429710aea29526ee4aa8ef20e25f2f05341da53992157d21ae032c0fb63

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

    Filesize

    102KB

    MD5

    b8e238c75f520098cd0e89b63ffcead7

    SHA1

    d781c7cb663a875695442a7a2bb44a396e47077a

    SHA256

    3c42fb86d01bd3e3f4f747778fdf10f57f3f1a31e8c6cb271f1595eb13dc5d4b

    SHA512

    745480a181ee2f2d8781a71be87b2095b147bf878b26aa292fa3c9509fcdd8051a7bf5abc37176278ee97d24e23b1173a71ed466b9529fe8c7ff1cf8229bea4a

  • memory/2100-16-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2100-18-0x00000000002F0000-0x00000000002F6000-memory.dmp

    Filesize

    24KB

  • memory/2100-21-0x00000000002C0000-0x00000000002C6000-memory.dmp

    Filesize

    24KB

  • memory/2100-95-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2208-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2208-1-0x0000000000420000-0x0000000000426000-memory.dmp

    Filesize

    24KB

  • memory/2208-2-0x0000000000450000-0x0000000000456000-memory.dmp

    Filesize

    24KB

  • memory/2208-4-0x0000000000420000-0x0000000000426000-memory.dmp

    Filesize

    24KB

  • memory/2208-15-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB