Analysis

  • max time kernel
    149s
  • max time network
    98s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    06-03-2023 03:00

General

  • Target

    412bb38f795aba08e44a81136b0f12c9a6be6b60db348e230c8bfa2b84eb9772.exe

  • Size

    72KB

  • MD5

    834a79ee7a59547a89ef4f849829b05b

  • SHA1

    28db68cffea38ed08db8fc3ed687a45494c38dcb

  • SHA256

    412bb38f795aba08e44a81136b0f12c9a6be6b60db348e230c8bfa2b84eb9772

  • SHA512

    3adebe76c029607c1630595714b959d0e335b12c5d6d6e444788803bdd9e879aa3ff5b6b5f9370f06e74c50a5a832efb7f7ce24f6fdb51147269ab4a45261774

  • SSDEEP

    1536:3vAkGoo+bH/J027ZKxyafwhHCC/mq1ktG:3vuWbaRgaYtX1ktG

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 5 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 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: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:1396
    • C:\Users\Admin\AppData\Local\Temp\412bb38f795aba08e44a81136b0f12c9a6be6b60db348e230c8bfa2b84eb9772.exe
      "C:\Users\Admin\AppData\Local\Temp\412bb38f795aba08e44a81136b0f12c9a6be6b60db348e230c8bfa2b84eb9772.exe"
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:1984
      • C:\Users\Admin\AppData\Local\Temp\412bb38f795aba08e44a81136b0f12c9a6be6b60db348e230c8bfa2b84eb9772.exe
        "C:\Users\Admin\AppData\Local\Temp\412bb38f795aba08e44a81136b0f12c9a6be6b60db348e230c8bfa2b84eb9772.exe" --v
        2⤵
          PID:2020
      • 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:1004
        • 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:860

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        557KB

        MD5

        cb077166b5cc181bde4c2bb30d28a99a

        SHA1

        800aab82a816e41ded59bc20cda364fa22dc0bcb

        SHA256

        40f19665b2ae343aa3838226e3393e2816a58fbb16fa4d2a3da8c602f20c9f72

        SHA512

        d1a9c9696f17e0ed3fe34996fef186c23ca9c0bb5cc1073a01bee88ca3d6a096dce61145f6339f88fd08fd4ac5d451105547a604c9a10fb373a78c6cf9df2811

      • 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/852-62-0x0000000000A70000-0x0000000000ABD000-memory.dmp

        Filesize

        308KB

      • memory/852-63-0x0000000001510000-0x0000000001582000-memory.dmp

        Filesize

        456KB

      • memory/852-65-0x0000000000A70000-0x0000000000ABD000-memory.dmp

        Filesize

        308KB

      • memory/852-83-0x0000000000A70000-0x0000000000ABD000-memory.dmp

        Filesize

        308KB

      • memory/852-74-0x0000000001510000-0x0000000001582000-memory.dmp

        Filesize

        456KB

      • memory/852-73-0x0000000000A70000-0x0000000000ABD000-memory.dmp

        Filesize

        308KB

      • memory/860-71-0x00000000001D0000-0x000000000022E000-memory.dmp

        Filesize

        376KB

      • memory/860-70-0x0000000000B20000-0x0000000000C21000-memory.dmp

        Filesize

        1.0MB

      • memory/1396-85-0x00000000004F0000-0x0000000000562000-memory.dmp

        Filesize

        456KB

      • memory/1396-67-0x00000000004F0000-0x0000000000562000-memory.dmp

        Filesize

        456KB

      • memory/1396-75-0x00000000004F0000-0x0000000000562000-memory.dmp

        Filesize

        456KB

      • memory/1396-66-0x0000000000060000-0x00000000000AD000-memory.dmp

        Filesize

        308KB

      • memory/1396-84-0x00000000004F0000-0x0000000000562000-memory.dmp

        Filesize

        456KB

      • memory/1396-72-0x00000000004F0000-0x0000000000562000-memory.dmp

        Filesize

        456KB

      • memory/1396-90-0x00000000004F0000-0x0000000000562000-memory.dmp

        Filesize

        456KB

      • memory/1396-105-0x0000000002A80000-0x0000000002B8A000-memory.dmp

        Filesize

        1.0MB

      • memory/1396-106-0x0000000000210000-0x0000000000230000-memory.dmp

        Filesize

        128KB

      • memory/1396-104-0x00000000001F0000-0x000000000020B000-memory.dmp

        Filesize

        108KB

      • memory/1396-107-0x00000000003B0000-0x00000000003CB000-memory.dmp

        Filesize

        108KB

      • memory/1396-117-0x0000000002A80000-0x0000000002B8A000-memory.dmp

        Filesize

        1.0MB