Analysis

  • max time kernel
    150s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    07-03-2023 14:11

General

  • Target

    file.exe

  • Size

    308KB

  • MD5

    75de993ffc429a40b338f5ab5f42f51d

  • SHA1

    d6ccae60897a050b2aa9ecbdf553bc8da116be7e

  • SHA256

    d75bdc11107b27e7602f31a93896dbc589dbd313cbb5e76a00d695208218e92a

  • SHA512

    5c249827b118c7a26776110405f4c83540c1fe01d394860320d9a1e2010248cb9cd4958dc9246589d845d61ed47b523cc931e32a269e47c5ba734601963bf7ec

  • SSDEEP

    6144:bOsY+HgEiTA14Xn0Ti8v1bbFgXIQdjrfzNt1iEP3:i814Xn0Ti8tbJyIQdjrfzMEP3

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:848
      • 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:1636
    • 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:1992
      • C:\Users\Admin\AppData\Local\Temp\file.exe
        "C:\Users\Admin\AppData\Local\Temp\file.exe" -h
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:1956
    • 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:1916
      • 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:1784

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      557KB

      MD5

      45ceed48afd68359f317952e8845ea02

      SHA1

      0149982c8c5a90616c3392974b1a543eb2b4e894

      SHA256

      ba07f9487a10ed278772d9571d6e867f53338029a3c4580eed2e08d8f5a8f9bd

      SHA512

      c41645620e26ece7bf044c7a7a8d43383e87a07baae20596d7e01a609d403396fc1993647724185b066e48d9b7f7bddca8913c838dfa56916de7dbd27b9bd4cf

    • 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/848-73-0x0000000000930000-0x000000000097D000-memory.dmp

      Filesize

      308KB

    • memory/848-62-0x0000000000930000-0x000000000097D000-memory.dmp

      Filesize

      308KB

    • memory/848-63-0x0000000000AF0000-0x0000000000B62000-memory.dmp

      Filesize

      456KB

    • memory/848-65-0x0000000000930000-0x000000000097D000-memory.dmp

      Filesize

      308KB

    • memory/848-83-0x0000000000930000-0x000000000097D000-memory.dmp

      Filesize

      308KB

    • memory/848-74-0x0000000000AF0000-0x0000000000B62000-memory.dmp

      Filesize

      456KB

    • memory/1636-84-0x00000000004C0000-0x0000000000532000-memory.dmp

      Filesize

      456KB

    • memory/1636-85-0x00000000004C0000-0x0000000000532000-memory.dmp

      Filesize

      456KB

    • memory/1636-117-0x00000000027B0000-0x00000000028BB000-memory.dmp

      Filesize

      1.0MB

    • memory/1636-94-0x0000000001FB0000-0x0000000001FCB000-memory.dmp

      Filesize

      108KB

    • memory/1636-75-0x00000000004C0000-0x0000000000532000-memory.dmp

      Filesize

      456KB

    • memory/1636-67-0x00000000004C0000-0x0000000000532000-memory.dmp

      Filesize

      456KB

    • memory/1636-66-0x0000000000060000-0x00000000000AD000-memory.dmp

      Filesize

      308KB

    • memory/1636-72-0x00000000004C0000-0x0000000000532000-memory.dmp

      Filesize

      456KB

    • memory/1636-90-0x00000000004C0000-0x0000000000532000-memory.dmp

      Filesize

      456KB

    • memory/1636-91-0x0000000000400000-0x000000000041B000-memory.dmp

      Filesize

      108KB

    • memory/1636-92-0x00000000027B0000-0x00000000028BB000-memory.dmp

      Filesize

      1.0MB

    • memory/1636-93-0x0000000000420000-0x0000000000440000-memory.dmp

      Filesize

      128KB

    • memory/1784-70-0x0000000001F20000-0x0000000002021000-memory.dmp

      Filesize

      1.0MB

    • memory/1784-71-0x0000000000430000-0x000000000048E000-memory.dmp

      Filesize

      376KB