Analysis

  • max time kernel
    150s
  • max time network
    96s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    08-03-2023 12:36

General

  • Target

    3b32570cfc08329e3bf2624f727ead3f.exe

  • Size

    308KB

  • MD5

    3b32570cfc08329e3bf2624f727ead3f

  • SHA1

    6f15ad55aab802e2c963c7d95d605cfd9e189ea3

  • SHA256

    c14dfbc33876ec82c3705cc8cedad7dda10646b4fd9d12c468d786187422bee7

  • SHA512

    9c380ea7111f6ebc335ddb5dd42b7f9b4ae32f93debfac83dfd544790fd644173b1b2d7685fb18801520eabc93fd3919b0c89d96519ed4bf0a2fec754fa5ebc8

  • SSDEEP

    6144:bOsY+HgEiTA14Xn0Ti8v1bbFgXIQdjrfzNt18EP3:i814Xn0Ti8tbJyIQdjrfzmEP3

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 4 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:1064
    • C:\Users\Admin\AppData\Local\Temp\3b32570cfc08329e3bf2624f727ead3f.exe
      "C:\Users\Admin\AppData\Local\Temp\3b32570cfc08329e3bf2624f727ead3f.exe"
      1⤵
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1340
      • C:\Users\Admin\AppData\Local\Temp\3b32570cfc08329e3bf2624f727ead3f.exe
        "C:\Users\Admin\AppData\Local\Temp\3b32570cfc08329e3bf2624f727ead3f.exe" -h
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:2036
    • 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:2024
      • 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:564

    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

      9c30fa2037dd0f1a65ea328211147109

      SHA1

      cd6694a6eb5f954371cd51ddc65b11612619eb5f

      SHA256

      747128cac7de41ff52779f8ff985f2eb8ec1735bb168ab269cd967b6b0e9cbc3

      SHA512

      e5fdeedc3b5843d5b2c3dbbe37e40f3cea9b5197a009d7af6dc8573f19d81d14a592a8291f1043f5e88032bf3a08d4f988704ae3397f103e92a547c612c7b99c

    • 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/564-68-0x0000000001E50000-0x0000000001F51000-memory.dmp
      Filesize

      1.0MB

    • memory/564-70-0x00000000003A0000-0x00000000003FE000-memory.dmp
      Filesize

      376KB

    • memory/836-73-0x00000000008A0000-0x00000000008ED000-memory.dmp
      Filesize

      308KB

    • memory/836-62-0x00000000008A0000-0x00000000008ED000-memory.dmp
      Filesize

      308KB

    • memory/836-65-0x00000000008A0000-0x00000000008ED000-memory.dmp
      Filesize

      308KB

    • memory/836-77-0x00000000008A0000-0x00000000008ED000-memory.dmp
      Filesize

      308KB

    • memory/836-63-0x00000000010D0000-0x0000000001142000-memory.dmp
      Filesize

      456KB

    • memory/836-74-0x00000000010D0000-0x0000000001142000-memory.dmp
      Filesize

      456KB

    • memory/1064-79-0x0000000000330000-0x00000000003A2000-memory.dmp
      Filesize

      456KB

    • memory/1064-85-0x0000000001CE0000-0x0000000001D00000-memory.dmp
      Filesize

      128KB

    • memory/1064-75-0x0000000000330000-0x00000000003A2000-memory.dmp
      Filesize

      456KB

    • memory/1064-67-0x0000000000330000-0x00000000003A2000-memory.dmp
      Filesize

      456KB

    • memory/1064-78-0x0000000000330000-0x00000000003A2000-memory.dmp
      Filesize

      456KB

    • memory/1064-66-0x0000000000060000-0x00000000000AD000-memory.dmp
      Filesize

      308KB

    • memory/1064-83-0x0000000001C20000-0x0000000001C3B000-memory.dmp
      Filesize

      108KB

    • memory/1064-72-0x0000000000330000-0x00000000003A2000-memory.dmp
      Filesize

      456KB

    • memory/1064-84-0x0000000002D60000-0x0000000002E6B000-memory.dmp
      Filesize

      1.0MB

    • memory/1064-86-0x0000000001D00000-0x0000000001D1B000-memory.dmp
      Filesize

      108KB

    • memory/1064-88-0x0000000000330000-0x00000000003A2000-memory.dmp
      Filesize

      456KB

    • memory/1064-108-0x0000000001C20000-0x0000000001C3B000-memory.dmp
      Filesize

      108KB

    • memory/1064-109-0x0000000002D60000-0x0000000002E6B000-memory.dmp
      Filesize

      1.0MB

    • memory/1064-110-0x0000000001CE0000-0x0000000001D00000-memory.dmp
      Filesize

      128KB

    • memory/1064-111-0x0000000001D00000-0x0000000001D1B000-memory.dmp
      Filesize

      108KB