Analysis

  • max time kernel
    150s
  • max time network
    144s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    25-03-2023 15:29

General

  • Target

    Crack.exe

  • Size

    880KB

  • MD5

    e299ac0fd27e67160225400bdd27366f

  • SHA1

    65011c91a7fbae82f4a6f3c81ff396b96f84359c

  • SHA256

    cb2758f0f595a4fd22411088590a3bb671834342e73b86c4ef9d863d28eec8ed

  • SHA512

    f4f4e4554b4391b50977948dbc7c1eb2c837fdb2f321665e406af90dba9ba4b2c4a851406ca13cb321c363602f24b963633c5153329f5e292f4a076e2cb98b46

  • SSDEEP

    6144:LQuiA1RTz/cYja2ieb5YbF5R+Jn8xH97r7F71d43wUmDm:nz/9ja2ieFYp5R+I7BY

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 37 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:468
      • 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:852
      • 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:836
    • C:\Users\Admin\AppData\Local\Temp\Crack.exe
      "C:\Users\Admin\AppData\Local\Temp\Crack.exe"
      1⤵
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:920
      • C:\Users\Admin\AppData\Local\Temp\Crack.exe
        "C:\Users\Admin\AppData\Local\Temp\Crack.exe" -h
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:876
    • 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:1396
      • 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:1640

    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

      df7b932ab62e929e3da95470914c10f3

      SHA1

      a63097f937fbe5cde36ab3b1530d5df0fb250fb5

      SHA256

      655a93928167bd8c84bc8dd6810c96cdd2e66a800197065ddb77bd30b2afef45

      SHA512

      7f24316896ce45ee7d3544c1920967ff9e3bb31020100a333b96b19d3ef421f9d6496b87248812ca7be288febf8fe7f7272652893df6f8756ac53d49d40b3d92

    • 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/836-103-0x0000000002200000-0x000000000221B000-memory.dmp
      Filesize

      108KB

    • memory/836-113-0x0000000002940000-0x0000000002A4B000-memory.dmp
      Filesize

      1.0MB

    • memory/836-83-0x0000000000490000-0x0000000000502000-memory.dmp
      Filesize

      456KB

    • memory/836-66-0x0000000000060000-0x00000000000AD000-memory.dmp
      Filesize

      308KB

    • memory/836-67-0x0000000000490000-0x0000000000502000-memory.dmp
      Filesize

      456KB

    • memory/836-102-0x0000000001D70000-0x0000000001D90000-memory.dmp
      Filesize

      128KB

    • memory/836-101-0x0000000002940000-0x0000000002A4B000-memory.dmp
      Filesize

      1.0MB

    • memory/836-72-0x0000000000490000-0x0000000000502000-memory.dmp
      Filesize

      456KB

    • memory/836-100-0x0000000001D50000-0x0000000001D6B000-memory.dmp
      Filesize

      108KB

    • memory/836-89-0x0000000000490000-0x0000000000502000-memory.dmp
      Filesize

      456KB

    • memory/836-75-0x0000000000490000-0x0000000000502000-memory.dmp
      Filesize

      456KB

    • memory/836-84-0x0000000000490000-0x0000000000502000-memory.dmp
      Filesize

      456KB

    • memory/852-62-0x0000000000A90000-0x0000000000ADD000-memory.dmp
      Filesize

      308KB

    • memory/852-82-0x0000000000A90000-0x0000000000ADD000-memory.dmp
      Filesize

      308KB

    • memory/852-74-0x0000000001350000-0x00000000013C2000-memory.dmp
      Filesize

      456KB

    • memory/852-73-0x0000000000A90000-0x0000000000ADD000-memory.dmp
      Filesize

      308KB

    • memory/852-65-0x0000000000A90000-0x0000000000ADD000-memory.dmp
      Filesize

      308KB

    • memory/852-63-0x0000000001350000-0x00000000013C2000-memory.dmp
      Filesize

      456KB

    • memory/1640-70-0x0000000000320000-0x000000000037E000-memory.dmp
      Filesize

      376KB

    • memory/1640-68-0x0000000000AB0000-0x0000000000BB1000-memory.dmp
      Filesize

      1.0MB