Analysis

  • max time kernel
    150s
  • max time network
    143s
  • platform
    windows10-1703_x64
  • resource
    win10-20230220-en
  • resource tags

    arch:x64arch:x86image:win10-20230220-enlocale:en-usos:windows10-1703-x64system
  • submitted
    22-02-2023 08:06

General

  • Target

    c4a0ba1e7feb1823cf944c841c24bdb63032e8a862a9f6d15f335de248a549dd.exe

  • Size

    312KB

  • MD5

    c93e8fd74bc5be14e7385d41ee1cb85a

  • SHA1

    27fc121b4920857c55723725b5d6b67633047b23

  • SHA256

    c4a0ba1e7feb1823cf944c841c24bdb63032e8a862a9f6d15f335de248a549dd

  • SHA512

    20fa83f0444267d79607e9f1481d49f50cacc2d1f3453755e9df52d15f0850818b2ecbaddf3dfde22c7d3f354785d61b379f9ce7b0ccfac905a7e47ded902b98

  • SSDEEP

    6144:E4PWLN3m+XeeqeO0UQeQ8KbLVHqAQg5jIQsdEPn:6aeqeO0UQB8KFHqAYdEPn

Malware Config

Signatures

  • Detects PseudoManuscrypt payload 28 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.

  • Loads dropped DLL 1 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 8 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 16 IoCs
  • Modifies registry class 22 IoCs
  • Script User-Agent 1 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 37 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1016
  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s Schedule
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:888
  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1084
  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s UserManager
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1224
  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s Themes
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1292
  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s SENS
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1452
  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1852
  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2200
  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2240
  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s Browser
    1⤵
    • Suspicious use of SetThreadContext
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2348
    • 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:4500
  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2452
  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s WpnService
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2476
  • C:\Users\Admin\AppData\Local\Temp\c4a0ba1e7feb1823cf944c841c24bdb63032e8a862a9f6d15f335de248a549dd.exe
    "C:\Users\Admin\AppData\Local\Temp\c4a0ba1e7feb1823cf944c841c24bdb63032e8a862a9f6d15f335de248a549dd.exe"
    1⤵
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4604
    • C:\Users\Admin\AppData\Local\Temp\c4a0ba1e7feb1823cf944c841c24bdb63032e8a862a9f6d15f335de248a549dd.exe
      "C:\Users\Admin\AppData\Local\Temp\c4a0ba1e7feb1823cf944c841c24bdb63032e8a862a9f6d15f335de248a549dd.exe" -h
      2⤵
      • Suspicious use of SetWindowsHookEx
      PID:2756
  • 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:4796
    • 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:4920

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    557KB

    MD5

    535677ceb05cbea48bc25b52a5c2da67

    SHA1

    52906724f2135086417fffb42a60cf6f0d55362d

    SHA256

    c685c604b16270bb5417594aa58f7c532e617d21f61ffe683a03c387dbbddefc

    SHA512

    c812b3612a00afffce17613629b72a6ac43a10f7ca69376c5e3dc87d1f60e6c38432ec73de74279c6e32ca20a47e8bbd23ef06fb7be50d46494701f1bcdcfb3b

  • 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

  • memory/888-171-0x0000019576BD0000-0x0000019576C42000-memory.dmp

    Filesize

    456KB

  • memory/888-216-0x0000019576BD0000-0x0000019576C42000-memory.dmp

    Filesize

    456KB

  • memory/1016-135-0x000001F841D60000-0x000001F841DD2000-memory.dmp

    Filesize

    456KB

  • memory/1016-164-0x000001F841D60000-0x000001F841DD2000-memory.dmp

    Filesize

    456KB

  • memory/1084-170-0x00000148A0310000-0x00000148A0382000-memory.dmp

    Filesize

    456KB

  • memory/1084-157-0x00000148A0310000-0x00000148A0382000-memory.dmp

    Filesize

    456KB

  • memory/1224-221-0x000001EAC00D0000-0x000001EAC0142000-memory.dmp

    Filesize

    456KB

  • memory/1224-198-0x000001EAC00D0000-0x000001EAC0142000-memory.dmp

    Filesize

    456KB

  • memory/1292-220-0x000001ABDAF70000-0x000001ABDAFE2000-memory.dmp

    Filesize

    456KB

  • memory/1292-191-0x000001ABDAF70000-0x000001ABDAFE2000-memory.dmp

    Filesize

    456KB

  • memory/1452-178-0x0000023FC1160000-0x0000023FC11D2000-memory.dmp

    Filesize

    456KB

  • memory/1452-218-0x0000023FC1160000-0x0000023FC11D2000-memory.dmp

    Filesize

    456KB

  • memory/1852-185-0x0000019796F80000-0x0000019796FF2000-memory.dmp

    Filesize

    456KB

  • memory/1852-219-0x0000019796F80000-0x0000019796FF2000-memory.dmp

    Filesize

    456KB

  • memory/2200-168-0x000001C608680000-0x000001C6086F2000-memory.dmp

    Filesize

    456KB

  • memory/2200-150-0x000001C608680000-0x000001C6086F2000-memory.dmp

    Filesize

    456KB

  • memory/2240-144-0x000002152CC40000-0x000002152CCB2000-memory.dmp

    Filesize

    456KB

  • memory/2240-166-0x000002152CC40000-0x000002152CCB2000-memory.dmp

    Filesize

    456KB

  • memory/2348-162-0x000002384CF20000-0x000002384CF92000-memory.dmp

    Filesize

    456KB

  • memory/2348-129-0x000002384C5A0000-0x000002384C5ED000-memory.dmp

    Filesize

    308KB

  • memory/2348-127-0x000002384CF20000-0x000002384CF92000-memory.dmp

    Filesize

    456KB

  • memory/2348-124-0x000002384C5A0000-0x000002384C5ED000-memory.dmp

    Filesize

    308KB

  • memory/2452-223-0x000002773E870000-0x000002773E8E2000-memory.dmp

    Filesize

    456KB

  • memory/2452-205-0x000002773E870000-0x000002773E8E2000-memory.dmp

    Filesize

    456KB

  • memory/2476-225-0x0000021155860000-0x00000211558D2000-memory.dmp

    Filesize

    456KB

  • memory/2476-211-0x0000021155860000-0x00000211558D2000-memory.dmp

    Filesize

    456KB

  • memory/4500-242-0x000001DF80140000-0x000001DF80160000-memory.dmp

    Filesize

    128KB

  • memory/4500-240-0x000001DF80120000-0x000001DF8013B000-memory.dmp

    Filesize

    108KB

  • memory/4500-269-0x000001DF80190000-0x000001DF801AB000-memory.dmp

    Filesize

    108KB

  • memory/4500-156-0x000001DFFDC40000-0x000001DFFDCB2000-memory.dmp

    Filesize

    456KB

  • memory/4500-136-0x000001DFFDC40000-0x000001DFFDCB2000-memory.dmp

    Filesize

    456KB

  • memory/4500-165-0x000001DFFDC40000-0x000001DFFDCB2000-memory.dmp

    Filesize

    456KB

  • memory/4500-230-0x000001DFFDC40000-0x000001DFFDCB2000-memory.dmp

    Filesize

    456KB

  • memory/4500-268-0x000001DF80140000-0x000001DF80160000-memory.dmp

    Filesize

    128KB

  • memory/4500-241-0x000001DF80700000-0x000001DF8080A000-memory.dmp

    Filesize

    1.0MB

  • memory/4500-267-0x000001DF80700000-0x000001DF8080A000-memory.dmp

    Filesize

    1.0MB

  • memory/4500-243-0x000001DF80190000-0x000001DF801AB000-memory.dmp

    Filesize

    108KB

  • memory/4500-266-0x000001DF80120000-0x000001DF8013B000-memory.dmp

    Filesize

    108KB

  • memory/4920-215-0x0000000000B70000-0x0000000000BCE000-memory.dmp

    Filesize

    376KB

  • memory/4920-160-0x0000000000B70000-0x0000000000BCE000-memory.dmp

    Filesize

    376KB

  • memory/4920-158-0x0000000003FF0000-0x00000000040F5000-memory.dmp

    Filesize

    1.0MB