Analysis

  • max time kernel
    150s
  • max time network
    94s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    09-03-2023 01:59

General

  • Target

    6bbbf2b1e89ed9d3b1bba44fc9acec53.exe

  • Size

    308KB

  • MD5

    6bbbf2b1e89ed9d3b1bba44fc9acec53

  • SHA1

    bb6b962ba30a55a9cbb87030bdd282223e42a48d

  • SHA256

    ad716b9b395d65dca7a31117215c2adedf392162eab7beee500f8061db4785c0

  • SHA512

    a7651ba72b4b45f3f4a7901412d1d3b41f8847fd59b15b9a61092cb9a2c4bc38aa1a2d274b549e49608e70b4ff1f4ab120a814e1fd5cffe7dd8d1a644aa737a0

  • SSDEEP

    6144:bOsY+HgEiTA14Xn0Ti8v1bbFgXIQdjrfzNt1sEP3:i814Xn0Ti8tbJyIQdjrfzCEP3

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: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:840
      • 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:1824
    • C:\Users\Admin\AppData\Local\Temp\6bbbf2b1e89ed9d3b1bba44fc9acec53.exe
      "C:\Users\Admin\AppData\Local\Temp\6bbbf2b1e89ed9d3b1bba44fc9acec53.exe"
      1⤵
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2040
      • C:\Users\Admin\AppData\Local\Temp\6bbbf2b1e89ed9d3b1bba44fc9acec53.exe
        "C:\Users\Admin\AppData\Local\Temp\6bbbf2b1e89ed9d3b1bba44fc9acec53.exe" -h
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:1996
    • 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:580
      • 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:752

    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

      ee5d452cc4ee71e1f544582bf6fca143

      SHA1

      a193952075b2b4a83759098754e814a931b8ba90

      SHA256

      f5cb9476e4b5576bb94eae1d278093b6470b0238226d4c05ec8c76747d57cbfe

      SHA512

      7a935ae3df65b949c5e7f1ed93bd2173165ef4e347ceb5879725fbb995aedeef853b5b1dc4c4155d423f34d004f8a0df59258cefdad5f49e617d0a74764c896b

    • 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/752-70-0x0000000000AD0000-0x0000000000BD1000-memory.dmp
      Filesize

      1.0MB

    • memory/752-71-0x0000000000850000-0x00000000008AE000-memory.dmp
      Filesize

      376KB

    • memory/840-73-0x00000000009A0000-0x00000000009ED000-memory.dmp
      Filesize

      308KB

    • memory/840-62-0x00000000009A0000-0x00000000009ED000-memory.dmp
      Filesize

      308KB

    • memory/840-83-0x00000000009A0000-0x00000000009ED000-memory.dmp
      Filesize

      308KB

    • memory/840-65-0x00000000009A0000-0x00000000009ED000-memory.dmp
      Filesize

      308KB

    • memory/840-63-0x00000000013A0000-0x0000000001412000-memory.dmp
      Filesize

      456KB

    • memory/840-74-0x00000000013A0000-0x0000000001412000-memory.dmp
      Filesize

      456KB

    • memory/1824-85-0x0000000000260000-0x00000000002D2000-memory.dmp
      Filesize

      456KB

    • memory/1824-91-0x0000000002BE0000-0x0000000002CEB000-memory.dmp
      Filesize

      1.0MB

    • memory/1824-75-0x0000000000260000-0x00000000002D2000-memory.dmp
      Filesize

      456KB

    • memory/1824-67-0x0000000000260000-0x00000000002D2000-memory.dmp
      Filesize

      456KB

    • memory/1824-84-0x0000000000260000-0x00000000002D2000-memory.dmp
      Filesize

      456KB

    • memory/1824-66-0x0000000000060000-0x00000000000AD000-memory.dmp
      Filesize

      308KB

    • memory/1824-90-0x0000000000570000-0x000000000058B000-memory.dmp
      Filesize

      108KB

    • memory/1824-72-0x0000000000260000-0x00000000002D2000-memory.dmp
      Filesize

      456KB

    • memory/1824-92-0x0000000000590000-0x00000000005B0000-memory.dmp
      Filesize

      128KB

    • memory/1824-93-0x0000000001CF0000-0x0000000001D0B000-memory.dmp
      Filesize

      108KB

    • memory/1824-94-0x0000000000260000-0x00000000002D2000-memory.dmp
      Filesize

      456KB

    • memory/1824-114-0x0000000000570000-0x000000000058B000-memory.dmp
      Filesize

      108KB

    • memory/1824-115-0x0000000002BE0000-0x0000000002CEB000-memory.dmp
      Filesize

      1.0MB

    • memory/1824-117-0x0000000001CF0000-0x0000000001D0B000-memory.dmp
      Filesize

      108KB

    • memory/1824-116-0x0000000000590000-0x00000000005B0000-memory.dmp
      Filesize

      128KB