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Analysis

  • max time kernel
    149s
  • max time network
    106s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    09/03/2023, 01:30

General

  • Target

    a1c5f268d670ba3a4440647bdeaa3e20.exe

  • Size

    308KB

  • MD5

    a1c5f268d670ba3a4440647bdeaa3e20

  • SHA1

    e79227b1a17dc76882f9eef1d65eb7588cce21a4

  • SHA256

    1868f0807fb9ad9be1629bc214b755ede9937036622ef31ae877617aba840080

  • SHA512

    7d43dd7edf54e5853eeea1636e3d05b7880f420d3cfdefc133e53287bb6814ac17921603922ac6c469540564a04d7a6504da5e79d711faff4148b0e7f68c2527

  • SSDEEP

    6144:bOsY+HgEiTA14Xn0Ti8v1bbFgXIQdjrfzNt1zEP3:i814Xn0Ti8tbJyIQdjrfzBEP3

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: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:836
      • 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:392
    • C:\Users\Admin\AppData\Local\Temp\a1c5f268d670ba3a4440647bdeaa3e20.exe
      "C:\Users\Admin\AppData\Local\Temp\a1c5f268d670ba3a4440647bdeaa3e20.exe"
      1⤵
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1764
      • C:\Users\Admin\AppData\Local\Temp\a1c5f268d670ba3a4440647bdeaa3e20.exe
        "C:\Users\Admin\AppData\Local\Temp\a1c5f268d670ba3a4440647bdeaa3e20.exe" -h
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:1092
    • 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:672
      • 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:1648

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

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

      Filesize

      557KB

      MD5

      54ac3dad9676bf56d6d5916d099b7859

      SHA1

      02a2b6459c451069a81aebaf1fa7753b663f4c6a

      SHA256

      e0e68ac4dc7141316a94c076f2b503e104207bcc2746dfa9e0c64a17bc984a0a

      SHA512

      7239359a7e22eb6a12ab370d52666fd67247d50dd52a58fffe2998ab16916088da7b15dd28c25bedc29f7ad4889f5e7a0f53cff94ea38843fc8060760d124c1d

    • 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/392-104-0x0000000002160000-0x000000000217B000-memory.dmp

      Filesize

      108KB

    • memory/392-114-0x0000000002E70000-0x0000000002F7B000-memory.dmp

      Filesize

      1.0MB

    • memory/392-84-0x0000000000450000-0x00000000004C2000-memory.dmp

      Filesize

      456KB

    • memory/392-66-0x00000000000E0000-0x000000000012D000-memory.dmp

      Filesize

      308KB

    • memory/392-67-0x0000000000450000-0x00000000004C2000-memory.dmp

      Filesize

      456KB

    • memory/392-103-0x0000000002120000-0x0000000002140000-memory.dmp

      Filesize

      128KB

    • memory/392-102-0x0000000002E70000-0x0000000002F7B000-memory.dmp

      Filesize

      1.0MB

    • memory/392-72-0x0000000000450000-0x00000000004C2000-memory.dmp

      Filesize

      456KB

    • memory/392-101-0x0000000001C10000-0x0000000001C2B000-memory.dmp

      Filesize

      108KB

    • memory/392-90-0x0000000000450000-0x00000000004C2000-memory.dmp

      Filesize

      456KB

    • memory/392-75-0x0000000000450000-0x00000000004C2000-memory.dmp

      Filesize

      456KB

    • memory/392-85-0x0000000000450000-0x00000000004C2000-memory.dmp

      Filesize

      456KB

    • memory/836-62-0x0000000000180000-0x00000000001CD000-memory.dmp

      Filesize

      308KB

    • memory/836-83-0x0000000000180000-0x00000000001CD000-memory.dmp

      Filesize

      308KB

    • memory/836-74-0x0000000000B00000-0x0000000000B72000-memory.dmp

      Filesize

      456KB

    • memory/836-73-0x0000000000180000-0x00000000001CD000-memory.dmp

      Filesize

      308KB

    • memory/836-65-0x0000000000180000-0x00000000001CD000-memory.dmp

      Filesize

      308KB

    • memory/836-63-0x0000000000B00000-0x0000000000B72000-memory.dmp

      Filesize

      456KB

    • memory/1648-69-0x00000000008E0000-0x000000000093E000-memory.dmp

      Filesize

      376KB

    • memory/1648-68-0x0000000001EA0000-0x0000000001FA1000-memory.dmp

      Filesize

      1.0MB