Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    09-03-2023 04:21

General

  • Target

    bf48a5cd9169a5826521a8a33b21adee.exe

  • Size

    308KB

  • MD5

    bf48a5cd9169a5826521a8a33b21adee

  • SHA1

    b769421d41836cb6fb1bfc624207ed4f2eac57b5

  • SHA256

    32e60467041b40146d87fc1c8c734f60f7e3763820e0c2a852a801c8afd1c7ab

  • SHA512

    a40ab338563540aaac258b62f29195e56432d137ce4052aee24cec4f01e4c115f116392f7657b9a9dbe2f0b05ff79818520a417ec3608892cbd68c69e9a25a71

  • SSDEEP

    6144:bOsY+HgEiTA14Xn0Ti8v1bbFgXIQdjrfzNt1KEP3:i814Xn0Ti8tbJyIQdjrfzQEP3

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:856
      • 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:1776
    • C:\Users\Admin\AppData\Local\Temp\bf48a5cd9169a5826521a8a33b21adee.exe
      "C:\Users\Admin\AppData\Local\Temp\bf48a5cd9169a5826521a8a33b21adee.exe"
      1⤵
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1548
      • C:\Users\Admin\AppData\Local\Temp\bf48a5cd9169a5826521a8a33b21adee.exe
        "C:\Users\Admin\AppData\Local\Temp\bf48a5cd9169a5826521a8a33b21adee.exe" -h
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:848
    • 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:592
      • 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:1032

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Discovery

    System Information Discovery

    2
    T1082

    Query Registry

    1
    T1012

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      557KB

      MD5

      819ae848dc8b172ef0db45a423cc4024

      SHA1

      e78a66524da011216a63d9936bd4b22b9d0335d2

      SHA256

      1213515bf29bf5dbedd80835b8cf1310b952525fcc716faf0b3d602930cacf24

      SHA512

      a8fe171c6edc22ee62999c70167a9d904d5d94a50e9dca7a7240dbd6a14b0e684fc19d5bc99dfbd3a82bdf8ccb62f6144a8b310f77432224631ac428ded0b084

    • 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/856-62-0x0000000000330000-0x000000000037D000-memory.dmp
      Filesize

      308KB

    • memory/856-63-0x0000000001110000-0x0000000001182000-memory.dmp
      Filesize

      456KB

    • memory/856-65-0x0000000000330000-0x000000000037D000-memory.dmp
      Filesize

      308KB

    • memory/856-83-0x0000000000330000-0x000000000037D000-memory.dmp
      Filesize

      308KB

    • memory/856-74-0x0000000001110000-0x0000000001182000-memory.dmp
      Filesize

      456KB

    • memory/856-73-0x0000000000330000-0x000000000037D000-memory.dmp
      Filesize

      308KB

    • memory/1032-71-0x0000000000310000-0x000000000036E000-memory.dmp
      Filesize

      376KB

    • memory/1032-70-0x0000000001E40000-0x0000000001F41000-memory.dmp
      Filesize

      1.0MB

    • memory/1776-85-0x0000000000490000-0x0000000000502000-memory.dmp
      Filesize

      456KB

    • memory/1776-67-0x0000000000490000-0x0000000000502000-memory.dmp
      Filesize

      456KB

    • memory/1776-75-0x0000000000490000-0x0000000000502000-memory.dmp
      Filesize

      456KB

    • memory/1776-66-0x0000000000060000-0x00000000000AD000-memory.dmp
      Filesize

      308KB

    • memory/1776-84-0x0000000000490000-0x0000000000502000-memory.dmp
      Filesize

      456KB

    • memory/1776-72-0x0000000000490000-0x0000000000502000-memory.dmp
      Filesize

      456KB

    • memory/1776-90-0x0000000000490000-0x0000000000502000-memory.dmp
      Filesize

      456KB

    • memory/1776-91-0x0000000000200000-0x000000000021B000-memory.dmp
      Filesize

      108KB

    • memory/1776-92-0x0000000002C60000-0x0000000002D6B000-memory.dmp
      Filesize

      1.0MB

    • memory/1776-93-0x0000000001C30000-0x0000000001C50000-memory.dmp
      Filesize

      128KB

    • memory/1776-94-0x0000000001C50000-0x0000000001C6B000-memory.dmp
      Filesize

      108KB

    • memory/1776-114-0x0000000002C60000-0x0000000002D6B000-memory.dmp
      Filesize

      1.0MB