Analysis

  • max time kernel
    151s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    22-02-2023 11:00

General

  • Target

    8c4b7faad766aea25bebe85e8f15f705.exe

  • Size

    312KB

  • MD5

    8c4b7faad766aea25bebe85e8f15f705

  • SHA1

    7e3588daf272343e6404195355dca4fb45b21bca

  • SHA256

    9a8d4f6c8f24d96d32ef8974ba8c96cc02d4fca7d46c3d1edf7e70d6027805f5

  • SHA512

    c0b3a92cbbae4c696039eb8dd543c8fd705ddfcbc9885070eac7ae31f3948cad1be3553fd1a8b222b50810d7dc4ca785ae636b6a979f5ab3395b34290b03abfc

  • SSDEEP

    6144:E4PWLN3m+XeeqeO0UQeQ8KbLVHqAQg5jIQswEPn:6aeqeO0UQB8KFHqAYwEPn

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 11 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: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:816
      • 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:1068
    • C:\Users\Admin\AppData\Local\Temp\8c4b7faad766aea25bebe85e8f15f705.exe
      "C:\Users\Admin\AppData\Local\Temp\8c4b7faad766aea25bebe85e8f15f705.exe"
      1⤵
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1988
      • C:\Users\Admin\AppData\Local\Temp\8c4b7faad766aea25bebe85e8f15f705.exe
        "C:\Users\Admin\AppData\Local\Temp\8c4b7faad766aea25bebe85e8f15f705.exe" -h
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:1748
    • 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:976
      • 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:1360

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

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

      Filesize

      557KB

      MD5

      f7e8df8e09b2ece08e769ba285f7bb92

      SHA1

      52157d2b18f5e9f1d932652fb4a414b5ceadfc1b

      SHA256

      20fb5f8100fa609f83b3af630e89091135f887d88007885aab16f89a2b38e7dc

      SHA512

      d21490bd29490a62250b97dd14ff951f8cadb65429010b0057c31371f01487f7439f9b6327b3f214a2aaa83c4c8c5a964e76fc19936f5403f2258b777b2a29b5

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

      Filesize

      52KB

      MD5

      1b20e998d058e813dfc515867d31124f

      SHA1

      c9dc9c42a748af18ae1a8c882b90a2b9e3313e6f

      SHA256

      24a53033a2e89acf65f6a5e60d35cb223585817032635e81bf31264eb7dabd00

      SHA512

      79849fbdb9a9e7f7684b570d14662448b093b8aa2b23dfd95856db3a78faf75a95d95c51b8aa8506c4fbecffebcc57cd153dda38c830c05b8cd38629fae673c6

    • C:\Windows\System32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

      Filesize

      61KB

      MD5

      fc4666cbca561e864e7fdf883a9e6661

      SHA1

      2f8d6094c7a34bf12ea0bbf0d51ee9c5bb7939a5

      SHA256

      10f3deb6c452d749a7451b5d065f4c0449737e5ee8a44f4d15844b503141e65b

      SHA512

      c71f54b571e01f247f072be4bbebdf5d8410b67eb79a61e7e0d9853fe857ab9bd12f53e6af3394b935560178107291fc4be351b27deb388eba90ba949633d57d

    • C:\Windows\System32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\F0ACCF77CDCBFF39F6191887F6D2D357

      Filesize

      1KB

      MD5

      a266bb7dcc38a562631361bbf61dd11b

      SHA1

      3b1efd3a66ea28b16697394703a72ca340a05bd5

      SHA256

      df545bf919a2439c36983b54cdfc903dfa4f37d3996d8d84b4c31eec6f3c163e

      SHA512

      0da8ef4f8f6ed3d16d2bc8eb816b9e6e1345dfe2d91160196c47e6149a1d6aedaafadcefd66acdea7f72dcf0832770192ceac15b0c559c4ccc2c0e5581d5aefc

    • C:\Windows\System32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

      Filesize

      342B

      MD5

      116829efc1b8cdd8dfddbd142ff0453d

      SHA1

      580355fa0758418cb161f7d2d9548b66003811ca

      SHA256

      8449feb41d0a77b643d382ac62e3204a5aba89b464bd4084d17c0b3821aeac03

      SHA512

      2c7cd46ad234ad0713d64a4eeaae6e3dfc0a7839aff076c8febb2bc943073d2f7a156546bfc69c22558657713f6cb93e94865814c11d7771b7f634629b7f5b0f

    • C:\Windows\System32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\F0ACCF77CDCBFF39F6191887F6D2D357

      Filesize

      242B

      MD5

      b14cb720d1c4bbbd897a1c18d9b658e4

      SHA1

      22aaf7013f2a8bbfc3d9e4f2e0cf0d1e20090d9d

      SHA256

      5f1276bbe78bb21a629f4f2c6a4db1ac0dbce0a160eb82148eebd664630e7144

      SHA512

      a1a42c6eb9e49583a600190f760a24fdcade5323bc73a5a18dd85b21f276b11132530678b07733f6afb461fef97529283043a2289ca20404bf64f955742d77ce

    • C:\Windows\Temp\CabF875.tmp

      Filesize

      29KB

      MD5

      d59a6b36c5a94916241a3ead50222b6f

      SHA1

      e274e9486d318c383bc4b9812844ba56f0cff3c6

      SHA256

      a38d01d3f024e626d579cf052ac3bd4260bb00c34bc6085977a5f4135ab09b53

      SHA512

      17012307955fef045e7c13bf0613bd40df27c29778ba6572640b76c18d379e02dc478e855c9276737363d0ad09b9a94f2adaa85da9c77ebb3c2d427aa68e2489

    • C:\Windows\Temp\TarFA21.tmp

      Filesize

      161KB

      MD5

      73b4b714b42fc9a6aaefd0ae59adb009

      SHA1

      efdaffd5b0ad21913d22001d91bf6c19ecb4ac41

      SHA256

      c0cf8cc04c34b5b80a2d86ad0eafb2dd71436f070c86b0321fba0201879625fd

      SHA512

      73af3c51b15f89237552b1718bef21fd80788fa416bab2cb2e7fb3a60d56249a716eda0d2dd68ab643752272640e7eaaaf57ce64bcb38373ddc3d035fb8d57cd

    • \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/816-74-0x0000000000B70000-0x0000000000BE2000-memory.dmp

      Filesize

      456KB

    • memory/816-65-0x0000000000930000-0x000000000097D000-memory.dmp

      Filesize

      308KB

    • memory/816-73-0x0000000000930000-0x000000000097D000-memory.dmp

      Filesize

      308KB

    • memory/816-62-0x0000000000930000-0x000000000097D000-memory.dmp

      Filesize

      308KB

    • memory/816-63-0x0000000000B70000-0x0000000000BE2000-memory.dmp

      Filesize

      456KB

    • memory/816-77-0x0000000000930000-0x000000000097D000-memory.dmp

      Filesize

      308KB

    • memory/1068-85-0x0000000001C20000-0x0000000001C3B000-memory.dmp

      Filesize

      108KB

    • memory/1068-78-0x0000000000480000-0x00000000004F2000-memory.dmp

      Filesize

      456KB

    • memory/1068-84-0x0000000000480000-0x00000000004F2000-memory.dmp

      Filesize

      456KB

    • memory/1068-72-0x0000000000480000-0x00000000004F2000-memory.dmp

      Filesize

      456KB

    • memory/1068-86-0x0000000002EB0000-0x0000000002FBA000-memory.dmp

      Filesize

      1.0MB

    • memory/1068-87-0x0000000001C40000-0x0000000001C60000-memory.dmp

      Filesize

      128KB

    • memory/1068-88-0x0000000001C60000-0x0000000001C7B000-memory.dmp

      Filesize

      108KB

    • memory/1068-242-0x0000000002EB0000-0x0000000002FBA000-memory.dmp

      Filesize

      1.0MB

    • memory/1068-67-0x0000000000480000-0x00000000004F2000-memory.dmp

      Filesize

      456KB

    • memory/1068-66-0x00000000000E0000-0x000000000012D000-memory.dmp

      Filesize

      308KB

    • memory/1068-79-0x0000000000480000-0x00000000004F2000-memory.dmp

      Filesize

      456KB

    • memory/1068-75-0x0000000000480000-0x00000000004F2000-memory.dmp

      Filesize

      456KB

    • memory/1360-69-0x0000000000950000-0x00000000009AE000-memory.dmp

      Filesize

      376KB

    • memory/1360-68-0x00000000003C0000-0x00000000004C1000-memory.dmp

      Filesize

      1.0MB