Analysis

  • max time kernel
    150s
  • max time network
    142s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    10-03-2023 12:22

General

  • Target

    04639854539053e9c2a0eea9e38b5b6c.exe

  • Size

    328KB

  • MD5

    04639854539053e9c2a0eea9e38b5b6c

  • SHA1

    f82c1215b7d4fbea5a136a483f9bd0d022ed36cd

  • SHA256

    7db1175e55e2bc864c8e8f0915b5f4167cb0a49a87a751b3fa429be6dc4a8896

  • SHA512

    aa0e94af988449358310000d94021b1fbbd7736e6ae505a79b88b14a6563f19157712b78d49e5e1b9e27b9f6a314823d3e8ad89d3ccc7979878fbea05f5acfb5

  • SSDEEP

    6144:evSBanJK/5kPas8N0HEAAf1vbViarAWbd33UEPT:evjas8uHEAAtvBpkREPT

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 64 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 4 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:864
      • 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:584
    • C:\Users\Admin\AppData\Local\Temp\04639854539053e9c2a0eea9e38b5b6c.exe
      "C:\Users\Admin\AppData\Local\Temp\04639854539053e9c2a0eea9e38b5b6c.exe"
      1⤵
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1720
      • C:\Users\Admin\AppData\Local\Temp\04639854539053e9c2a0eea9e38b5b6c.exe
        "C:\Users\Admin\AppData\Local\Temp\04639854539053e9c2a0eea9e38b5b6c.exe" -h
        2⤵
        • Modifies registry class
        • Suspicious use of SetWindowsHookEx
        PID:1632
    • 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:1528
      • 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:1248

    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

      50195924762ca74975bfe703a408e687

      SHA1

      e3d29ab66cba1da445c98ae7c26c3e822aa5debf

      SHA256

      a04ae2447a8a37d4a5542815189ccca3dca71c02d744f51c6cbcee4048204116

      SHA512

      61902d8b500b19438fdcdc3d99b238313c95d15947f29e6f5c30b5e5a90aaf92624ee153648d33024cba20f6dbaf599deca5cd5c64cb2b7f3d9f8ea1de9800a0

    • 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/584-98-0x0000000001D60000-0x0000000001D7B000-memory.dmp
      Filesize

      108KB

    • memory/584-108-0x0000000002BD0000-0x0000000002CDB000-memory.dmp
      Filesize

      1.0MB

    • memory/584-82-0x00000000004A0000-0x0000000000512000-memory.dmp
      Filesize

      456KB

    • memory/584-66-0x0000000000060000-0x00000000000AD000-memory.dmp
      Filesize

      308KB

    • memory/584-97-0x0000000001C40000-0x0000000001C60000-memory.dmp
      Filesize

      128KB

    • memory/584-67-0x00000000004A0000-0x0000000000512000-memory.dmp
      Filesize

      456KB

    • memory/584-96-0x0000000002BD0000-0x0000000002CDB000-memory.dmp
      Filesize

      1.0MB

    • memory/584-72-0x00000000004A0000-0x0000000000512000-memory.dmp
      Filesize

      456KB

    • memory/584-73-0x00000000004A0000-0x0000000000512000-memory.dmp
      Filesize

      456KB

    • memory/584-95-0x0000000000270000-0x000000000028B000-memory.dmp
      Filesize

      108KB

    • memory/584-93-0x00000000004A0000-0x0000000000512000-memory.dmp
      Filesize

      456KB

    • memory/584-77-0x00000000004A0000-0x0000000000512000-memory.dmp
      Filesize

      456KB

    • memory/864-62-0x0000000000860000-0x00000000008AD000-memory.dmp
      Filesize

      308KB

    • memory/864-75-0x0000000000FE0000-0x0000000001052000-memory.dmp
      Filesize

      456KB

    • memory/864-94-0x0000000000860000-0x00000000008AD000-memory.dmp
      Filesize

      308KB

    • memory/864-74-0x0000000000860000-0x00000000008AD000-memory.dmp
      Filesize

      308KB

    • memory/864-65-0x0000000000860000-0x00000000008AD000-memory.dmp
      Filesize

      308KB

    • memory/864-63-0x0000000000FE0000-0x0000000001052000-memory.dmp
      Filesize

      456KB

    • memory/1248-69-0x0000000000760000-0x00000000007BE000-memory.dmp
      Filesize

      376KB

    • memory/1248-68-0x0000000000C00000-0x0000000000D01000-memory.dmp
      Filesize

      1.0MB