Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    16-03-2023 10:13

General

  • Target

    tmp.exe

  • Size

    328KB

  • MD5

    0b39012e51e6d52ddc49dd9676ba9920

  • SHA1

    7e329120d82c58a5f2ccae98eb78d749f1095ff4

  • SHA256

    6aea187ca91ea68222b4e650e2b4baa46ba11252f74763a2d2edec2924a98f10

  • SHA512

    8d13528c02f727d6c15257050657f702622fdbc7836f0b01eda8f48edbe2aa2bb4f8dceb3652f9adead9774f3387a6bba20f95b988dd9fee642ddba5bd457a0c

  • SSDEEP

    6144:evSBanJK/5kPas8N0HEAAf1vbViarAWbd33uEPT:evjas8uHEAAtvBpkLEPT

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 64 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:464
      • 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:812
      • 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:1528
    • C:\Users\Admin\AppData\Local\Temp\tmp.exe
      "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
      1⤵
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1704
      • C:\Users\Admin\AppData\Local\Temp\tmp.exe
        "C:\Users\Admin\AppData\Local\Temp\tmp.exe" -h
        2⤵
        • Modifies registry class
        • Suspicious use of SetWindowsHookEx
        PID:892
    • 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:1748
      • 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:800

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      557KB

      MD5

      b15c9612f747a2c7d6c429275c853b23

      SHA1

      46b5013dcc6677feabafb3c35d8aec6e79e1e6d3

      SHA256

      07b7dbc6e80247cee12695bc386079435ec90d0228f799ff884330b9f4e3c2d5

      SHA512

      2f70c8c18434e7a7e1475acda04ba2d3e13fd20c73ee14ff28eda50394898333e8c7067bea69cca28cff1226cdf050db55df2bcd629fb82b9f0535a505d07305

    • 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/800-70-0x0000000001F80000-0x0000000002081000-memory.dmp

      Filesize

      1.0MB

    • memory/800-71-0x0000000000570000-0x00000000005CE000-memory.dmp

      Filesize

      376KB

    • memory/812-73-0x0000000000860000-0x00000000008AD000-memory.dmp

      Filesize

      308KB

    • memory/812-62-0x0000000000860000-0x00000000008AD000-memory.dmp

      Filesize

      308KB

    • memory/812-77-0x0000000000860000-0x00000000008AD000-memory.dmp

      Filesize

      308KB

    • memory/812-65-0x0000000000860000-0x00000000008AD000-memory.dmp

      Filesize

      308KB

    • memory/812-63-0x0000000000B40000-0x0000000000BB2000-memory.dmp

      Filesize

      456KB

    • memory/812-74-0x0000000000B40000-0x0000000000BB2000-memory.dmp

      Filesize

      456KB

    • memory/1528-79-0x0000000000470000-0x00000000004E2000-memory.dmp

      Filesize

      456KB

    • memory/1528-85-0x0000000002C40000-0x0000000002D4B000-memory.dmp

      Filesize

      1.0MB

    • memory/1528-75-0x0000000000470000-0x00000000004E2000-memory.dmp

      Filesize

      456KB

    • memory/1528-67-0x0000000000470000-0x00000000004E2000-memory.dmp

      Filesize

      456KB

    • memory/1528-78-0x0000000000470000-0x00000000004E2000-memory.dmp

      Filesize

      456KB

    • memory/1528-66-0x00000000000E0000-0x000000000012D000-memory.dmp

      Filesize

      308KB

    • memory/1528-84-0x0000000001C10000-0x0000000001C2B000-memory.dmp

      Filesize

      108KB

    • memory/1528-72-0x0000000000470000-0x00000000004E2000-memory.dmp

      Filesize

      456KB

    • memory/1528-86-0x0000000001C30000-0x0000000001C50000-memory.dmp

      Filesize

      128KB

    • memory/1528-87-0x0000000001C50000-0x0000000001C6B000-memory.dmp

      Filesize

      108KB

    • memory/1528-88-0x0000000000470000-0x00000000004E2000-memory.dmp

      Filesize

      456KB

    • memory/1528-108-0x0000000001C10000-0x0000000001C2B000-memory.dmp

      Filesize

      108KB

    • memory/1528-109-0x0000000002C40000-0x0000000002D4B000-memory.dmp

      Filesize

      1.0MB

    • memory/1528-110-0x0000000001C30000-0x0000000001C50000-memory.dmp

      Filesize

      128KB

    • memory/1528-111-0x0000000001C50000-0x0000000001C6B000-memory.dmp

      Filesize

      108KB