Analysis

  • max time kernel
    300s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    27-02-2023 22:29

General

  • Target

    4ca6df75008045a45e441869a4389b4ef620df9f89cd5f05fd329d0f9987c822.exe

  • Size

    312KB

  • MD5

    eb7d2add3fe15ee8524a07c2c75bedb9

  • SHA1

    d13c52cd6709f416aefe338922c77bae33a85f31

  • SHA256

    4ca6df75008045a45e441869a4389b4ef620df9f89cd5f05fd329d0f9987c822

  • SHA512

    484f1172d1c0c240a8b3cb7412f41cafc25a6473256d96da4a2ed7657a7606e1a2ae202b4db43e5db180dc3325c3211b524f2d52389bd52452c5f09e2d194701

  • SSDEEP

    6144:E4PWLN3m+XeeqeO0UQeQ8KbLVHqAQg5jIQshEPn:6aeqeO0UQB8KFHqAYhEPn

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 37 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:824
      • 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:1012
    • C:\Users\Admin\AppData\Local\Temp\4ca6df75008045a45e441869a4389b4ef620df9f89cd5f05fd329d0f9987c822.exe
      "C:\Users\Admin\AppData\Local\Temp\4ca6df75008045a45e441869a4389b4ef620df9f89cd5f05fd329d0f9987c822.exe"
      1⤵
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1336
      • C:\Users\Admin\AppData\Local\Temp\4ca6df75008045a45e441869a4389b4ef620df9f89cd5f05fd329d0f9987c822.exe
        "C:\Users\Admin\AppData\Local\Temp\4ca6df75008045a45e441869a4389b4ef620df9f89cd5f05fd329d0f9987c822.exe" -h
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:868
    • 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:1732
      • 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:916

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    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/824-62-0x0000000000260000-0x00000000002AD000-memory.dmp

      Filesize

      308KB

    • memory/824-63-0x0000000002180000-0x00000000021F2000-memory.dmp

      Filesize

      456KB

    • memory/824-65-0x0000000000260000-0x00000000002AD000-memory.dmp

      Filesize

      308KB

    • memory/824-82-0x0000000000260000-0x00000000002AD000-memory.dmp

      Filesize

      308KB

    • memory/824-74-0x0000000002180000-0x00000000021F2000-memory.dmp

      Filesize

      456KB

    • memory/824-73-0x0000000000260000-0x00000000002AD000-memory.dmp

      Filesize

      308KB

    • memory/916-71-0x0000000001F20000-0x0000000002021000-memory.dmp

      Filesize

      1.0MB

    • memory/916-72-0x0000000000390000-0x00000000003EE000-memory.dmp

      Filesize

      376KB

    • memory/1012-84-0x0000000000490000-0x0000000000502000-memory.dmp

      Filesize

      456KB

    • memory/1012-67-0x0000000000490000-0x0000000000502000-memory.dmp

      Filesize

      456KB

    • memory/1012-75-0x0000000000490000-0x0000000000502000-memory.dmp

      Filesize

      456KB

    • memory/1012-66-0x0000000000110000-0x000000000015D000-memory.dmp

      Filesize

      308KB

    • memory/1012-83-0x0000000000490000-0x0000000000502000-memory.dmp

      Filesize

      456KB

    • memory/1012-70-0x0000000000490000-0x0000000000502000-memory.dmp

      Filesize

      456KB

    • memory/1012-89-0x0000000000490000-0x0000000000502000-memory.dmp

      Filesize

      456KB

    • memory/1012-90-0x00000000002F0000-0x000000000030B000-memory.dmp

      Filesize

      108KB

    • memory/1012-91-0x0000000002BE0000-0x0000000002CEA000-memory.dmp

      Filesize

      1.0MB

    • memory/1012-92-0x0000000001D30000-0x0000000001D50000-memory.dmp

      Filesize

      128KB

    • memory/1012-93-0x0000000001D50000-0x0000000001D6B000-memory.dmp

      Filesize

      108KB

    • memory/1012-116-0x0000000002BE0000-0x0000000002CEA000-memory.dmp

      Filesize

      1.0MB