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Analysis

  • max time kernel
    122s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    29/02/2024, 05:29

General

  • Target

    2024-02-29_a302b78a27dcd5847cdf9fade08ba524_cryptolocker.exe

  • Size

    83KB

  • MD5

    a302b78a27dcd5847cdf9fade08ba524

  • SHA1

    a71ced9b16fa4318627c1c71dc56095680b7ed8d

  • SHA256

    2164c4fcdf3cb87c5351841f1a6e9431bd306957eed5df7d97883591983db74e

  • SHA512

    3b3efff707d5121a5c34bff6625c95bfe2b44ed260d1f4236b141aef3b0c92ed72b08aa1a5f00b8fc32abf4e04ad16c79af1556acdc01d165fb89d46412799c4

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1kyJS18:zCsanOtEvwDpjC

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\2024-02-29_a302b78a27dcd5847cdf9fade08ba524_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-29_a302b78a27dcd5847cdf9fade08ba524_cryptolocker.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2944
    • 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:284

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\Tar156B.tmp

    Filesize

    175KB

    MD5

    dd73cead4b93366cf3465c8cd32e2796

    SHA1

    74546226dfe9ceb8184651e920d1dbfb432b314e

    SHA256

    a6752b7851b591550e4625b832a393aabcc428de18d83e8593cd540f7d7cae22

    SHA512

    ce1bdd595065c94fa528badf4a6a8777893807d6789267612755df818ba6ffe55e4df429710aea29526ee4aa8ef20e25f2f05341da53992157d21ae032c0fb63

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

    Filesize

    83KB

    MD5

    cb10c43307752162045f2a3d3a78c9eb

    SHA1

    5ec02edaf5703d16486702997baaaa6116c08cc7

    SHA256

    05a7fcde17197f9c8bd83e6f7279f315ac860244143f92088ee8fdf42a4aa04f

    SHA512

    94e93958f5e485a958d50cd20b6bc377e3a0fb94366691059d943245421fb42878593117281c7990ed30c310346619eeeee6c7c185314929b09b9e748451599b

  • memory/284-16-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/284-18-0x0000000000300000-0x0000000000306000-memory.dmp

    Filesize

    24KB

  • memory/284-25-0x00000000002C0000-0x00000000002C6000-memory.dmp

    Filesize

    24KB

  • memory/284-95-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2944-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2944-1-0x0000000000240000-0x0000000000246000-memory.dmp

    Filesize

    24KB

  • memory/2944-3-0x0000000000240000-0x0000000000246000-memory.dmp

    Filesize

    24KB

  • memory/2944-2-0x0000000000480000-0x0000000000486000-memory.dmp

    Filesize

    24KB

  • memory/2944-15-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB