Analysis

  • max time kernel
    300s
  • max time network
    182s
  • platform
    windows10-1703_x64
  • resource
    win10-20230220-en
  • resource tags

    arch:x64arch:x86image:win10-20230220-enlocale:en-usos:windows10-1703-x64system
  • submitted
    25-02-2023 04:58

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 29 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 WpnService
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2476
  • 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 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 IKEEXT
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2240
  • 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 ShellHWDetection
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1852
  • 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 Themes
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1292
  • 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 ProfSvc
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1084
  • 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 gpsvc
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1016
  • 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:4600
    • C:\Users\Admin\AppData\Local\Temp\4ca6df75008045a45e441869a4389b4ef620df9f89cd5f05fd329d0f9987c822.exe
      "C:\Users\Admin\AppData\Local\Temp\4ca6df75008045a45e441869a4389b4ef620df9f89cd5f05fd329d0f9987c822.exe" -h
      2⤵
      • Suspicious use of SetWindowsHookEx
      PID:2740
  • 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 Matrix ATT&CK v6

Discovery

System Information Discovery

2
T1082

Query Registry

1
T1012

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

  • memory/888-170-0x0000019576BD0000-0x0000019576C42000-memory.dmp
    Filesize

    456KB

  • memory/888-213-0x0000019576BD0000-0x0000019576C42000-memory.dmp
    Filesize

    456KB

  • memory/1016-134-0x000001F841D60000-0x000001F841DD2000-memory.dmp
    Filesize

    456KB

  • memory/1016-157-0x000001F841D60000-0x000001F841DD2000-memory.dmp
    Filesize

    456KB

  • memory/1084-163-0x00000148A0310000-0x00000148A0382000-memory.dmp
    Filesize

    456KB

  • memory/1084-211-0x00000148A0310000-0x00000148A0382000-memory.dmp
    Filesize

    456KB

  • memory/1224-219-0x000001EAC00D0000-0x000001EAC0142000-memory.dmp
    Filesize

    456KB

  • memory/1224-196-0x000001EAC00D0000-0x000001EAC0142000-memory.dmp
    Filesize

    456KB

  • memory/1292-190-0x000001ABDAF70000-0x000001ABDAFE2000-memory.dmp
    Filesize

    456KB

  • memory/1292-218-0x000001ABDAF70000-0x000001ABDAFE2000-memory.dmp
    Filesize

    456KB

  • memory/1452-214-0x0000023FC1160000-0x0000023FC11D2000-memory.dmp
    Filesize

    456KB

  • memory/1452-177-0x0000023FC1160000-0x0000023FC11D2000-memory.dmp
    Filesize

    456KB

  • memory/1852-183-0x0000019796F80000-0x0000019796FF2000-memory.dmp
    Filesize

    456KB

  • memory/1852-215-0x0000019796F80000-0x0000019796FF2000-memory.dmp
    Filesize

    456KB

  • memory/2200-152-0x000001C608680000-0x000001C6086F2000-memory.dmp
    Filesize

    456KB

  • memory/2200-200-0x000001C608680000-0x000001C6086F2000-memory.dmp
    Filesize

    456KB

  • memory/2240-160-0x000002152CC40000-0x000002152CCB2000-memory.dmp
    Filesize

    456KB

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

    456KB

  • memory/2348-155-0x000002384CF20000-0x000002384CF92000-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/2452-203-0x000002773E870000-0x000002773E8E2000-memory.dmp
    Filesize

    456KB

  • memory/2452-221-0x000002773E870000-0x000002773E8E2000-memory.dmp
    Filesize

    456KB

  • memory/2476-209-0x0000021155860000-0x00000211558D2000-memory.dmp
    Filesize

    456KB

  • memory/2476-222-0x0000021155860000-0x00000211558D2000-memory.dmp
    Filesize

    456KB

  • memory/4500-138-0x000001F7D1B00000-0x000001F7D1B72000-memory.dmp
    Filesize

    456KB

  • memory/4500-148-0x000001F7D1B00000-0x000001F7D1B72000-memory.dmp
    Filesize

    456KB

  • memory/4500-245-0x000001F7D3370000-0x000001F7D338B000-memory.dmp
    Filesize

    108KB

  • memory/4500-244-0x000001F7D3340000-0x000001F7D3360000-memory.dmp
    Filesize

    128KB

  • memory/4500-242-0x000001F7D3320000-0x000001F7D333B000-memory.dmp
    Filesize

    108KB

  • memory/4500-159-0x000001F7D1B00000-0x000001F7D1B72000-memory.dmp
    Filesize

    456KB

  • memory/4500-229-0x000001F7D1B00000-0x000001F7D1B72000-memory.dmp
    Filesize

    456KB

  • memory/4500-265-0x000001F7D4090000-0x000001F7D419A000-memory.dmp
    Filesize

    1.0MB

  • memory/4500-243-0x000001F7D4090000-0x000001F7D419A000-memory.dmp
    Filesize

    1.0MB

  • memory/4920-151-0x00000000041F0000-0x00000000042F5000-memory.dmp
    Filesize

    1.0MB

  • memory/4920-216-0x0000000004170000-0x00000000041CE000-memory.dmp
    Filesize

    376KB

  • memory/4920-153-0x0000000004170000-0x00000000041CE000-memory.dmp
    Filesize

    376KB