Analysis

  • max time kernel
    150s
  • max time network
    165s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30/11/2022, 23:25

General

  • Target
    67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed.exe
  • Size 492KB
  • Sample221130-3d8w8sec35
  • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 4 IoCs
  • UAC bypass 3 TTPs 13 IoCs
  • Adds policy Run key to start application 2 TTPs 29 IoCs
  • Disables RegEdit via registry modification 6 IoCs
  • Executes dropped EXE 4 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Adds Run key to start application 2 TTPs 64 IoCs
  • Checks whether UAC is enabled 1 TTPs 8 IoCs
  • Looks up external IP address via web service 5 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops autorun.inf file 1 TTPs 2 IoCs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Drops file in System32 directory 32 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 32 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs
  • System policy modification 1 TTPs 41 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed.exe
    "C:\Users\Admin\AppData\Local\Temp\67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3436
    • C:\Users\Admin\AppData\Local\Temp\yborjrewily.exe
      "C:\Users\Admin\AppData\Local\Temp\yborjrewily.exe" "c:\users\admin\appdata\local\temp\67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed.exe*"
      2⤵
      • Modifies WinLogon for persistence
      • UAC bypass
      • Adds policy Run key to start application
      • Disables RegEdit via registry modification
      • Executes dropped EXE
      • Checks computer location settings
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Drops file in System32 directory
      • Drops file in Windows directory
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:2316
      • C:\Users\Admin\AppData\Local\Temp\bjjnp.exe
        "C:\Users\Admin\AppData\Local\Temp\bjjnp.exe" "-C:\Users\Admin\AppData\Local\Temp\yrcrebrhqkhphpmz.exe"
        3⤵
        • Modifies WinLogon for persistence
        • UAC bypass
        • Adds policy Run key to start application
        • Disables RegEdit via registry modification
        • Executes dropped EXE
        • Adds Run key to start application
        • Checks whether UAC is enabled
        • Drops autorun.inf file
        • Drops file in System32 directory
        • Drops file in Program Files directory
        • Drops file in Windows directory
        • Suspicious use of AdjustPrivilegeToken
        • System policy modification
        PID:2140
      • C:\Users\Admin\AppData\Local\Temp\bjjnp.exe
        "C:\Users\Admin\AppData\Local\Temp\bjjnp.exe" "-C:\Users\Admin\AppData\Local\Temp\yrcrebrhqkhphpmz.exe"
        3⤵
        • Modifies WinLogon for persistence
        • UAC bypass
        • Adds policy Run key to start application
        • Disables RegEdit via registry modification
        • Executes dropped EXE
        • Adds Run key to start application
        • Checks whether UAC is enabled
        • Drops file in System32 directory
        • Drops file in Windows directory
        • System policy modification
        PID:1972
    • C:\Users\Admin\AppData\Local\Temp\yborjrewily.exe
      "C:\Users\Admin\AppData\Local\Temp\yborjrewily.exe" "c:\users\admin\appdata\local\temp\67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed.exe"
      2⤵
      • Modifies WinLogon for persistence
      • UAC bypass
      • Adds policy Run key to start application
      • Executes dropped EXE
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Drops file in System32 directory
      • Drops file in Windows directory
      • System policy modification
      PID:3856

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        bjjnp.exe

        • Path C:\Users\Admin\AppData\Local\Temp\bjjnp.exe
        • Size 700KB
        • SHA256 22585897f2a36e1c398b95df907619be4559f827dd8dec946ceac50c58db8c1b
        • MD5 SHA1 SHA512 SSDEEP

        bjjnp.exe

        • Path C:\Users\Admin\AppData\Local\Temp\bjjnp.exe
        • Size 700KB
        • SHA256 22585897f2a36e1c398b95df907619be4559f827dd8dec946ceac50c58db8c1b
        • MD5 SHA1 SHA512 SSDEEP

        bjjnp.exe

        • Path C:\Users\Admin\AppData\Local\Temp\bjjnp.exe
        • Size 700KB
        • SHA256 22585897f2a36e1c398b95df907619be4559f827dd8dec946ceac50c58db8c1b
        • MD5 SHA1 SHA512 SSDEEP

        bzpjbdythgivsfhzwypnd.exe

        • Path C:\Users\Admin\AppData\Local\Temp\bzpjbdythgivsfhzwypnd.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        fzlbpnevfayhajhvo.exe

        • Path C:\Users\Admin\AppData\Local\Temp\fzlbpnevfayhajhvo.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        mjyrijdxkijvrdevrsif.exe

        • Path C:\Users\Admin\AppData\Local\Temp\mjyrijdxkijvrdevrsif.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        ojwncbtlwsrbvfetnm.exe

        • Path C:\Users\Admin\AppData\Local\Temp\ojwncbtlwsrbvfetnm.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        sridwzvrggjxvjmfdgyxoj.exe

        • Path C:\Users\Admin\AppData\Local\Temp\sridwzvrggjxvjmfdgyxoj.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        yborjrewily.exe

        • Path C:\Users\Admin\AppData\Local\Temp\yborjrewily.exe
        • Size 320KB
        • SHA256 4e3c3d828e817e130b4cee188392b0f897244a0c1f81c39d0c1ae0976ab2d31b
        • MD5 SHA1 SHA512 SSDEEP

        yborjrewily.exe

        • Path C:\Users\Admin\AppData\Local\Temp\yborjrewily.exe
        • Size 320KB
        • SHA256 4e3c3d828e817e130b4cee188392b0f897244a0c1f81c39d0c1ae0976ab2d31b
        • MD5 SHA1 SHA512 SSDEEP

        yborjrewily.exe

        • Path C:\Users\Admin\AppData\Local\Temp\yborjrewily.exe
        • Size 320KB
        • SHA256 4e3c3d828e817e130b4cee188392b0f897244a0c1f81c39d0c1ae0976ab2d31b
        • MD5 SHA1 SHA512 SSDEEP

        yrcrebrhqkhphpmz.exe

        • Path C:\Users\Admin\AppData\Local\Temp\yrcrebrhqkhphpmz.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        zvjbrrkdpmmxsddtood.exe

        • Path C:\Users\Admin\AppData\Local\Temp\zvjbrrkdpmmxsddtood.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        bzpjbdythgivsfhzwypnd.exe

        • Path C:\Windows\SysWOW64\bzpjbdythgivsfhzwypnd.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        fzlbpnevfayhajhvo.exe

        • Path C:\Windows\SysWOW64\fzlbpnevfayhajhvo.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        mjyrijdxkijvrdevrsif.exe

        • Path C:\Windows\SysWOW64\mjyrijdxkijvrdevrsif.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        ojwncbtlwsrbvfetnm.exe

        • Path C:\Windows\SysWOW64\ojwncbtlwsrbvfetnm.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        sridwzvrggjxvjmfdgyxoj.exe

        • Path C:\Windows\SysWOW64\sridwzvrggjxvjmfdgyxoj.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        yrcrebrhqkhphpmz.exe

        • Path C:\Windows\SysWOW64\yrcrebrhqkhphpmz.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        zvjbrrkdpmmxsddtood.exe

        • Path C:\Windows\SysWOW64\zvjbrrkdpmmxsddtood.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        bzpjbdythgivsfhzwypnd.exe

        • Path C:\Windows\bzpjbdythgivsfhzwypnd.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        bzpjbdythgivsfhzwypnd.exe

        • Path C:\Windows\bzpjbdythgivsfhzwypnd.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        bzpjbdythgivsfhzwypnd.exe

        • Path C:\Windows\bzpjbdythgivsfhzwypnd.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        fzlbpnevfayhajhvo.exe

        • Path C:\Windows\fzlbpnevfayhajhvo.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        fzlbpnevfayhajhvo.exe

        • Path C:\Windows\fzlbpnevfayhajhvo.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        fzlbpnevfayhajhvo.exe

        • Path C:\Windows\fzlbpnevfayhajhvo.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        mjyrijdxkijvrdevrsif.exe

        • Path C:\Windows\mjyrijdxkijvrdevrsif.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        mjyrijdxkijvrdevrsif.exe

        • Path C:\Windows\mjyrijdxkijvrdevrsif.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        mjyrijdxkijvrdevrsif.exe

        • Path C:\Windows\mjyrijdxkijvrdevrsif.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        ojwncbtlwsrbvfetnm.exe

        • Path C:\Windows\ojwncbtlwsrbvfetnm.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        ojwncbtlwsrbvfetnm.exe

        • Path C:\Windows\ojwncbtlwsrbvfetnm.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        ojwncbtlwsrbvfetnm.exe

        • Path C:\Windows\ojwncbtlwsrbvfetnm.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        sridwzvrggjxvjmfdgyxoj.exe

        • Path C:\Windows\sridwzvrggjxvjmfdgyxoj.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        sridwzvrggjxvjmfdgyxoj.exe

        • Path C:\Windows\sridwzvrggjxvjmfdgyxoj.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        sridwzvrggjxvjmfdgyxoj.exe

        • Path C:\Windows\sridwzvrggjxvjmfdgyxoj.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        yrcrebrhqkhphpmz.exe

        • Path C:\Windows\yrcrebrhqkhphpmz.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        yrcrebrhqkhphpmz.exe

        • Path C:\Windows\yrcrebrhqkhphpmz.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        yrcrebrhqkhphpmz.exe

        • Path C:\Windows\yrcrebrhqkhphpmz.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        zvjbrrkdpmmxsddtood.exe

        • Path C:\Windows\zvjbrrkdpmmxsddtood.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        zvjbrrkdpmmxsddtood.exe

        • Path C:\Windows\zvjbrrkdpmmxsddtood.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP

        zvjbrrkdpmmxsddtood.exe

        • Path C:\Windows\zvjbrrkdpmmxsddtood.exe
        • Size 492KB
        • SHA256 67387611c614dff5cd7b6fc938ae38a88520c7fa3e16be72c0b84414de84b6ed
        • MD5 SHA1 SHA512 SSDEEP