Analysis

  • max time kernel
    1378s
  • max time network
    1382s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    28-06-2022 16:12

General

  • Target

    3924b012439ef8ce1946af7e7f8396ecb97e4c564cffa6d18b9cfccd5645c311.exe

  • Size

    251KB

  • MD5

    3b522c3e3fc6cf29a2c8c65a80f14a08

  • SHA1

    91d0554ae2d347a98a695b4ee9aea4061794bb38

  • SHA256

    3924b012439ef8ce1946af7e7f8396ecb97e4c564cffa6d18b9cfccd5645c311

  • SHA512

    a1dba2dd77ae3637b0809aece3ffb8827e21498d3127b56d6390ced34444ccf10c56a2741b4c52cf53efa5ab0dcdcfc52e68561322dab74d975e9e15b6d545aa

Malware Config

Signatures

  • Locky

    Ransomware strain released in 2016, with advanced features like anti-analysis.

  • suricata: ET MALWARE Self-Signed Cert Observed in Various Zbot Strains

    suricata: ET MALWARE Self-Signed Cert Observed in Various Zbot Strains

  • Modifies extensions of user files 2 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Deletes itself 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Modifies Control Panel 2 IoCs
  • Modifies Internet Explorer settings 1 TTPs 36 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3924b012439ef8ce1946af7e7f8396ecb97e4c564cffa6d18b9cfccd5645c311.exe
    "C:\Users\Admin\AppData\Local\Temp\3924b012439ef8ce1946af7e7f8396ecb97e4c564cffa6d18b9cfccd5645c311.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:304
    • C:\Users\Admin\AppData\Local\Temp\3924b012439ef8ce1946af7e7f8396ecb97e4c564cffa6d18b9cfccd5645c311.exe
      "C:\Users\Admin\AppData\Local\Temp\3924b012439ef8ce1946af7e7f8396ecb97e4c564cffa6d18b9cfccd5645c311.exe"
      2⤵
      • Modifies extensions of user files
      • Sets desktop wallpaper using registry
      • Modifies Control Panel
      • Suspicious use of WriteProcessMemory
      PID:1900
      • C:\Program Files\Internet Explorer\iexplore.exe
        "C:\Program Files\Internet Explorer\iexplore.exe" C:\Users\Admin\Desktop\_HELP_instructions.html
        3⤵
        • Modifies Internet Explorer settings
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:972
        • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
          "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:972 CREDAT:275457 /prefetch:2
          4⤵
          • Modifies Internet Explorer settings
          • Suspicious use of SetWindowsHookEx
          PID:1700
      • C:\Windows\SysWOW64\cmd.exe
        cmd.exe /C del /Q /F "C:\Users\Admin\AppData\Local\Temp\3924b012439ef8ce1946af7e7f8396ecb97e4c564cffa6d18b9cfccd5645c311.exe"
        3⤵
        • Deletes itself
        PID:864
  • C:\Windows\SysWOW64\DllHost.exe
    C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
    1⤵
    • Suspicious use of FindShellTrayWindow
    PID:784

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

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

    60KB

    MD5

    308336e7f515478969b24c13ded11ede

    SHA1

    8fb0cf42b77dbbef224a1e5fc38abc2486320775

    SHA256

    889b832323726a9f10ad03f85562048fdcfe20c9ff6f9d37412cf477b4e92ff9

    SHA512

    61ad97228cd6c3909ef3ac5e4940199971f293bdd0d5eb7916e60469573a44b6287c0fa1e0b6c1389df35eb6c9a7d2a61fdb318d4a886a3821ef5a9dab3ac24f

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

    342B

    MD5

    b08566d679ac683b812e071b9eaf4625

    SHA1

    d84a0c31674b21404f2a1cb5ac7a1a3b2b1a1693

    SHA256

    bf4863e07f5bd4328b0fbd24cdf2526322fd02f9a6ad8b71567a41896a9c46d7

    SHA512

    299a7b57399e57f3f30c0c4cc81e827d6fd9cf39d79ce80062e0c863e4022735104ee1383c82a2f40b1a22a4805d8cda352a490d8c4d38aa6d739eed9173f753

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\FQ7CCS06.txt
    Filesize

    599B

    MD5

    60d371c36f91fd02a1928a47ea17445a

    SHA1

    c3ecd9713bf644885dc8b103b9626e89572130bb

    SHA256

    85032141ecdbdd11e8bf8572e57c0da87c9b38e9d04bcec94445355e360f1c9c

    SHA512

    905220228d16356c8a25fd4ca235b7cb9280652d2c710f1bfc37ec73f79f27722eed708823f28913f4cc7a036aa0839054500d291bd0158216bac1c440a40882

  • C:\Users\Admin\Desktop\_HELP_instructions.bmp
    Filesize

    3.5MB

    MD5

    2f52128003c21d3f93d6b99fabcb65f6

    SHA1

    851c0052bd759812664426d771cc60a422722423

    SHA256

    ed370120793955d8127ce84824fe62e285b06bed38922843924398a5289c311a

    SHA512

    1e5b9d7607cb33880f1d3eb8d2c474c4db59363813c408704f320ca5431a9e1ba387df6c88656b7faf8f8d02b292a95e05ddf25e864c11da24a4b1f38aafce3f

  • C:\Users\Admin\Desktop\_HELP_instructions.html
    Filesize

    9KB

    MD5

    a03db2c8d24f594c682bb26921d86aa6

    SHA1

    261900251d936aedb6bde9d780eb10594e88e84c

    SHA256

    cfef3317a7fdd39e293585962b75a0eb730bcf46267162d1ba24757c9610d8b0

    SHA512

    693011254d35be6ee078f7c41fdf5b942802dea3d5f4970a442d64cd7c2c5c99fc26fd2ba598f7a13378e7b6e444c9cb1853bd14f82ceadc1d8afdf40a700aeb

  • \Users\Admin\AppData\Local\Temp\nsj6386.tmp\System.dll
    Filesize

    11KB

    MD5

    3e6bf00b3ac976122f982ae2aadb1c51

    SHA1

    caab188f7fdc84d3fdcb2922edeeb5ed576bd31d

    SHA256

    4ff9b2678d698677c5d9732678f9cf53f17290e09d053691aac4cc6e6f595cbe

    SHA512

    1286f05e6a7e6b691f6e479638e7179897598e171b52eb3a3dc0e830415251069d29416b6d1ffc6d7dce8da5625e1479be06db9b7179e7776659c5c1ad6aa706

  • memory/304-56-0x0000000000340000-0x0000000000344000-memory.dmp
    Filesize

    16KB

  • memory/304-59-0x0000000000340000-0x0000000000344000-memory.dmp
    Filesize

    16KB

  • memory/304-54-0x0000000075311000-0x0000000075313000-memory.dmp
    Filesize

    8KB

  • memory/864-64-0x0000000000000000-mapping.dmp
  • memory/1900-61-0x0000000000400000-0x0000000000426000-memory.dmp
    Filesize

    152KB

  • memory/1900-65-0x00000000005C0000-0x00000000005E6000-memory.dmp
    Filesize

    152KB

  • memory/1900-62-0x00000000005C0000-0x00000000005E6000-memory.dmp
    Filesize

    152KB

  • memory/1900-60-0x0000000000400000-0x0000000000426000-memory.dmp
    Filesize

    152KB

  • memory/1900-57-0x000000000040560B-mapping.dmp