Analysis

  • max time kernel
    149s
  • max time network
    102s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    21-03-2023 00:19

General

  • Target

    file.exe

  • Size

    880KB

  • MD5

    7e9d6867dfd8711952376aa02aaeb453

  • SHA1

    a90cf5c5d9079716dde8b0c2be20dbd6fb0fbc3d

  • SHA256

    a759dfe145751752776c392ad2f5dffd1fa7f4e77e3f5daeeb2258baa2271262

  • SHA512

    94a0e3160fed3a977d631ee1b2c9c9cc2235fedab0ad7e1231ae837ccfbacc04d3a92e9a367dfe299bdf998bbb926667f84b013263acb41bf0debf23fed61674

  • SSDEEP

    6144:LQuiA1RTz/cYja2ieb5YbF5R+Jn8xH97r7F/1d43wUmDm:nz/9ja2ieFYp5R+I7VY

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
  • Script User-Agent 1 IoCs

    Uses user-agent string associated with script host/environment.

  • 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:464
      • 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:820
      • 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:1652
    • C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe"
      1⤵
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2008
      • C:\Users\Admin\AppData\Local\Temp\file.exe
        "C:\Users\Admin\AppData\Local\Temp\file.exe" -h
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:1976
    • 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:472
      • 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:2024

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      557KB

      MD5

      9dd748ec666aca6d3fee60839649fb02

      SHA1

      d09baa2751e2972fca1ded62d40823889ca8d41d

      SHA256

      555ced7986ad075033f84cf3b656143f7ca8194aa5824415d2d668123e59fac6

      SHA512

      1faff5e33104061a8479b4e03979e23c9814d14a19d780b5b6cdd81af5f371fcd6f96c8f08ba3760b7b660dcf9667e7e7e9f13284d119936bed046cc19c5fdb8

    • 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/820-79-0x0000000000B80000-0x0000000000BCD000-memory.dmp

      Filesize

      308KB

    • memory/820-62-0x0000000000B80000-0x0000000000BCD000-memory.dmp

      Filesize

      308KB

    • memory/820-63-0x00000000011A0000-0x0000000001212000-memory.dmp

      Filesize

      456KB

    • memory/820-65-0x0000000000B80000-0x0000000000BCD000-memory.dmp

      Filesize

      308KB

    • memory/820-83-0x0000000000B80000-0x0000000000BCD000-memory.dmp

      Filesize

      308KB

    • memory/820-80-0x00000000011A0000-0x0000000001212000-memory.dmp

      Filesize

      456KB

    • memory/1652-84-0x00000000004A0000-0x0000000000512000-memory.dmp

      Filesize

      456KB

    • memory/1652-85-0x00000000004A0000-0x0000000000512000-memory.dmp

      Filesize

      456KB

    • memory/1652-114-0x0000000002F30000-0x000000000303B000-memory.dmp

      Filesize

      1.0MB

    • memory/1652-97-0x0000000001C40000-0x0000000001C60000-memory.dmp

      Filesize

      128KB

    • memory/1652-81-0x00000000004A0000-0x0000000000512000-memory.dmp

      Filesize

      456KB

    • memory/1652-67-0x00000000004A0000-0x0000000000512000-memory.dmp

      Filesize

      456KB

    • memory/1652-66-0x00000000000F0000-0x000000000013D000-memory.dmp

      Filesize

      308KB

    • memory/1652-72-0x00000000004A0000-0x0000000000512000-memory.dmp

      Filesize

      456KB

    • memory/1652-90-0x00000000004A0000-0x0000000000512000-memory.dmp

      Filesize

      456KB

    • memory/1652-91-0x0000000000300000-0x000000000031B000-memory.dmp

      Filesize

      108KB

    • memory/1652-96-0x0000000002F30000-0x000000000303B000-memory.dmp

      Filesize

      1.0MB

    • memory/1652-98-0x0000000001C60000-0x0000000001C7B000-memory.dmp

      Filesize

      108KB

    • memory/2024-70-0x0000000001FD0000-0x00000000020D1000-memory.dmp

      Filesize

      1.0MB

    • memory/2024-71-0x0000000000250000-0x00000000002AE000-memory.dmp

      Filesize

      376KB