Analysis

  • max time kernel
    149s
  • max time network
    98s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    24-03-2023 01:31

General

  • Target

    bbd550a356ad847fbec4080976e7f7d72b3d431d923df772b65880b7a5cc7254.exe

  • Size

    880KB

  • MD5

    50793b3b016fe3d7042a286e70c8c2db

  • SHA1

    636db5add1b385fdbe8f01a097a39aa64591fc8e

  • SHA256

    bbd550a356ad847fbec4080976e7f7d72b3d431d923df772b65880b7a5cc7254

  • SHA512

    b2035b2fcd0eb4b3874b2a0cf14ce25b17509129fe88924f1884a70e78b51a78922d6299e728b113754cbb1b21f02565c4367644d99712f93f052134a9ac91b3

  • SSDEEP

    6144:LQuiA1RTz/cYja2ieb5YbF5R+Jn8xH97r7FU1d43wUmDm:nz/9ja2ieFYp5R+I7uY

Malware Config

Signatures

  • Detects PseudoManuscrypt payload 8 IoCs
  • Process spawned unexpected child process 1 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • PseudoManuscrypt

    PseudoManuscrypt is a malware Lazarus’s Manuscrypt targeting government organizations and ICS.

  • Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs
  • Loads dropped DLL 4 IoCs
  • Unexpected DNS network traffic destination 1 IoCs

    Network traffic to other servers than the configured DNS servers was detected on the DNS port.

  • Looks up external IP address via web service 1 IoCs

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

  • Drops file in System32 directory 3 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.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies data under HKEY_USERS 64 IoCs
  • Modifies registry class 22 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 44 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Windows\system32\services.exe
    C:\Windows\system32\services.exe
    1⤵
      PID:460
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k netsvcs
        2⤵
        • Suspicious use of NtCreateUserProcessOtherParentProcess
        • Suspicious use of SetThreadContext
        • Modifies registry class
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:828
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k WspService
        2⤵
        • Drops file in System32 directory
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        • Modifies registry class
        • Suspicious behavior: GetForegroundWindowSpam
        PID:820
    • C:\Users\Admin\AppData\Local\Temp\bbd550a356ad847fbec4080976e7f7d72b3d431d923df772b65880b7a5cc7254.exe
      "C:\Users\Admin\AppData\Local\Temp\bbd550a356ad847fbec4080976e7f7d72b3d431d923df772b65880b7a5cc7254.exe"
      1⤵
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1656
      • C:\Users\Admin\AppData\Local\Temp\bbd550a356ad847fbec4080976e7f7d72b3d431d923df772b65880b7a5cc7254.exe
        "C:\Users\Admin\AppData\Local\Temp\bbd550a356ad847fbec4080976e7f7d72b3d431d923df772b65880b7a5cc7254.exe" -h
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:1508
    • C:\Windows\system32\rundll32.exe
      rundll32.exe "C:\Users\Admin\AppData\Local\Temp\db.dll",open
      1⤵
      • Process spawned unexpected child process
      • Suspicious use of WriteProcessMemory
      PID:672
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\db.dll",open
        2⤵
        • Loads dropped DLL
        • Modifies registry class
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1624

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Discovery

    System Information Discovery

    2
    T1082

    Query Registry

    1
    T1012

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\db.dat
      Filesize

      557KB

      MD5

      12a2ea9884738cc71cd622a9c86bc041

      SHA1

      e0dbb25a0c54b69c2b35e05ba58f40b053463f4b

      SHA256

      1181ed73b4f90cb0fc4c787d4791adf14ac25bbb02460a78ab0959bd2dbf5aaf

      SHA512

      d0abf082376c90bdaff759b7e7502c0791de17ca554e695141506e6f6f0fe29aac9d71e817d4a601e2b2db47c88e03203d54f59cdd29c0f7b1e161c5a063c15b

    • C:\Users\Admin\AppData\Local\Temp\db.dll
      Filesize

      52KB

      MD5

      1b20e998d058e813dfc515867d31124f

      SHA1

      c9dc9c42a748af18ae1a8c882b90a2b9e3313e6f

      SHA256

      24a53033a2e89acf65f6a5e60d35cb223585817032635e81bf31264eb7dabd00

      SHA512

      79849fbdb9a9e7f7684b570d14662448b093b8aa2b23dfd95856db3a78faf75a95d95c51b8aa8506c4fbecffebcc57cd153dda38c830c05b8cd38629fae673c6

    • \Users\Admin\AppData\Local\Temp\db.dll
      Filesize

      52KB

      MD5

      1b20e998d058e813dfc515867d31124f

      SHA1

      c9dc9c42a748af18ae1a8c882b90a2b9e3313e6f

      SHA256

      24a53033a2e89acf65f6a5e60d35cb223585817032635e81bf31264eb7dabd00

      SHA512

      79849fbdb9a9e7f7684b570d14662448b093b8aa2b23dfd95856db3a78faf75a95d95c51b8aa8506c4fbecffebcc57cd153dda38c830c05b8cd38629fae673c6

    • \Users\Admin\AppData\Local\Temp\db.dll
      Filesize

      52KB

      MD5

      1b20e998d058e813dfc515867d31124f

      SHA1

      c9dc9c42a748af18ae1a8c882b90a2b9e3313e6f

      SHA256

      24a53033a2e89acf65f6a5e60d35cb223585817032635e81bf31264eb7dabd00

      SHA512

      79849fbdb9a9e7f7684b570d14662448b093b8aa2b23dfd95856db3a78faf75a95d95c51b8aa8506c4fbecffebcc57cd153dda38c830c05b8cd38629fae673c6

    • \Users\Admin\AppData\Local\Temp\db.dll
      Filesize

      52KB

      MD5

      1b20e998d058e813dfc515867d31124f

      SHA1

      c9dc9c42a748af18ae1a8c882b90a2b9e3313e6f

      SHA256

      24a53033a2e89acf65f6a5e60d35cb223585817032635e81bf31264eb7dabd00

      SHA512

      79849fbdb9a9e7f7684b570d14662448b093b8aa2b23dfd95856db3a78faf75a95d95c51b8aa8506c4fbecffebcc57cd153dda38c830c05b8cd38629fae673c6

    • \Users\Admin\AppData\Local\Temp\db.dll
      Filesize

      52KB

      MD5

      1b20e998d058e813dfc515867d31124f

      SHA1

      c9dc9c42a748af18ae1a8c882b90a2b9e3313e6f

      SHA256

      24a53033a2e89acf65f6a5e60d35cb223585817032635e81bf31264eb7dabd00

      SHA512

      79849fbdb9a9e7f7684b570d14662448b093b8aa2b23dfd95856db3a78faf75a95d95c51b8aa8506c4fbecffebcc57cd153dda38c830c05b8cd38629fae673c6

    • memory/820-103-0x0000000001CE0000-0x0000000001CFB000-memory.dmp
      Filesize

      108KB

    • memory/820-113-0x0000000002FB0000-0x00000000030BB000-memory.dmp
      Filesize

      1.0MB

    • memory/820-84-0x00000000004A0000-0x0000000000512000-memory.dmp
      Filesize

      456KB

    • memory/820-66-0x0000000000060000-0x00000000000AD000-memory.dmp
      Filesize

      308KB

    • memory/820-100-0x00000000001F0000-0x000000000020B000-memory.dmp
      Filesize

      108KB

    • memory/820-69-0x00000000004A0000-0x0000000000512000-memory.dmp
      Filesize

      456KB

    • memory/820-102-0x0000000001C40000-0x0000000001C60000-memory.dmp
      Filesize

      128KB

    • memory/820-101-0x0000000002FB0000-0x00000000030BB000-memory.dmp
      Filesize

      1.0MB

    • memory/820-89-0x00000000004A0000-0x0000000000512000-memory.dmp
      Filesize

      456KB

    • memory/820-74-0x00000000004A0000-0x0000000000512000-memory.dmp
      Filesize

      456KB

    • memory/820-76-0x00000000004A0000-0x0000000000512000-memory.dmp
      Filesize

      456KB

    • memory/820-83-0x00000000004A0000-0x0000000000512000-memory.dmp
      Filesize

      456KB

    • memory/828-62-0x0000000000850000-0x000000000089D000-memory.dmp
      Filesize

      308KB

    • memory/828-70-0x0000000001010000-0x0000000001082000-memory.dmp
      Filesize

      456KB

    • memory/828-65-0x0000000000850000-0x000000000089D000-memory.dmp
      Filesize

      308KB

    • memory/828-63-0x0000000001010000-0x0000000001082000-memory.dmp
      Filesize

      456KB

    • memory/1624-73-0x00000000004B0000-0x000000000050E000-memory.dmp
      Filesize

      376KB

    • memory/1624-68-0x00000000004B0000-0x000000000050E000-memory.dmp
      Filesize

      376KB

    • memory/1624-67-0x0000000001EB0000-0x0000000001FB1000-memory.dmp
      Filesize

      1.0MB