Analysis

  • max time kernel
    299s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    08-03-2023 03:56

General

  • Target

    ad716b9b395d65dca7a31117215c2adedf392162eab7beee500f8061db4785c0.exe

  • Size

    308KB

  • MD5

    6bbbf2b1e89ed9d3b1bba44fc9acec53

  • SHA1

    bb6b962ba30a55a9cbb87030bdd282223e42a48d

  • SHA256

    ad716b9b395d65dca7a31117215c2adedf392162eab7beee500f8061db4785c0

  • SHA512

    a7651ba72b4b45f3f4a7901412d1d3b41f8847fd59b15b9a61092cb9a2c4bc38aa1a2d274b549e49608e70b4ff1f4ab120a814e1fd5cffe7dd8d1a644aa737a0

  • SSDEEP

    6144:bOsY+HgEiTA14Xn0Ti8v1bbFgXIQdjrfzNt1sEP3:i814Xn0Ti8tbJyIQdjrfzCEP3

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 5 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: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:840
      • 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:1876
    • C:\Users\Admin\AppData\Local\Temp\ad716b9b395d65dca7a31117215c2adedf392162eab7beee500f8061db4785c0.exe
      "C:\Users\Admin\AppData\Local\Temp\ad716b9b395d65dca7a31117215c2adedf392162eab7beee500f8061db4785c0.exe"
      1⤵
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:624
      • C:\Users\Admin\AppData\Local\Temp\ad716b9b395d65dca7a31117215c2adedf392162eab7beee500f8061db4785c0.exe
        "C:\Users\Admin\AppData\Local\Temp\ad716b9b395d65dca7a31117215c2adedf392162eab7beee500f8061db4785c0.exe" -h
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:928
    • 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:1316
      • 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:1172

    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

      30d5f615722d12fdda4f378048221909

      SHA1

      e94e3e3a6fae8b29f0f80128761ad1b69304a7eb

      SHA256

      b7cb464cd0c61026ec38d89c0a041393bc9369e217303677551eec65a09d2628

      SHA512

      a561a224d7228ec531a966c7dbd6bc88138e2f4a1c8112e5950644f69bf3a43b1e87e03bc1b4fd5e9ca071b5a9353b18697573404602ccd51f2946faf95144c2

    • 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/840-83-0x0000000000950000-0x000000000099D000-memory.dmp
      Filesize

      308KB

    • memory/840-63-0x0000000000950000-0x000000000099D000-memory.dmp
      Filesize

      308KB

    • memory/840-64-0x0000000000B50000-0x0000000000BC2000-memory.dmp
      Filesize

      456KB

    • memory/840-66-0x0000000000950000-0x000000000099D000-memory.dmp
      Filesize

      308KB

    • memory/840-77-0x0000000000B50000-0x0000000000BC2000-memory.dmp
      Filesize

      456KB

    • memory/840-75-0x0000000000950000-0x000000000099D000-memory.dmp
      Filesize

      308KB

    • memory/1172-71-0x0000000000250000-0x00000000002AE000-memory.dmp
      Filesize

      376KB

    • memory/1172-62-0x0000000002130000-0x0000000002231000-memory.dmp
      Filesize

      1.0MB

    • memory/1876-85-0x0000000000470000-0x00000000004E2000-memory.dmp
      Filesize

      456KB

    • memory/1876-67-0x00000000000F0000-0x000000000013D000-memory.dmp
      Filesize

      308KB

    • memory/1876-78-0x0000000000470000-0x00000000004E2000-memory.dmp
      Filesize

      456KB

    • memory/1876-68-0x0000000000470000-0x00000000004E2000-memory.dmp
      Filesize

      456KB

    • memory/1876-84-0x0000000000470000-0x00000000004E2000-memory.dmp
      Filesize

      456KB

    • memory/1876-72-0x0000000000470000-0x00000000004E2000-memory.dmp
      Filesize

      456KB

    • memory/1876-90-0x0000000000470000-0x00000000004E2000-memory.dmp
      Filesize

      456KB

    • memory/1876-104-0x0000000001C10000-0x0000000001C2B000-memory.dmp
      Filesize

      108KB

    • memory/1876-105-0x0000000002AD0000-0x0000000002BDB000-memory.dmp
      Filesize

      1.0MB

    • memory/1876-106-0x0000000001C30000-0x0000000001C50000-memory.dmp
      Filesize

      128KB

    • memory/1876-107-0x0000000001C50000-0x0000000001C6B000-memory.dmp
      Filesize

      108KB

    • memory/1876-117-0x0000000002AD0000-0x0000000002BDB000-memory.dmp
      Filesize

      1.0MB