Analysis

  • max time kernel
    149s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    23-02-2023 13:41

General

  • Target

    file.exe

  • Size

    312KB

  • MD5

    b7f3bbe2d4281867faafbf082b126334

  • SHA1

    ffc748cf49fbc9fcd8fb9ba42ffd11839bcb9e4a

  • SHA256

    0a5d832f3594465625f855e63075362cf73ef323fc32964e73327aa6a1030584

  • SHA512

    3aa22851b4ded467b8bf8c830afa16fe9b55f5655d429b67d42ec50fab3e88898489670329cb36c5b859dd3767809fdf976a152900832ba3bd67ed50aeb966a3

  • SSDEEP

    6144:E4PWLN3m+XeeqeO0UQeQ8KbLVHqAQg5jIQsfEPn:6aeqeO0UQB8KFHqAYfEPn

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 13 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: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:856
      • 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:1116
    • C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe"
      1⤵
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1324
      • C:\Users\Admin\AppData\Local\Temp\file.exe
        "C:\Users\Admin\AppData\Local\Temp\file.exe" -h
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:1104
    • 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:676
      • 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:592

    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

      45ceed48afd68359f317952e8845ea02

      SHA1

      0149982c8c5a90616c3392974b1a543eb2b4e894

      SHA256

      ba07f9487a10ed278772d9571d6e867f53338029a3c4580eed2e08d8f5a8f9bd

      SHA512

      c41645620e26ece7bf044c7a7a8d43383e87a07baae20596d7e01a609d403396fc1993647724185b066e48d9b7f7bddca8913c838dfa56916de7dbd27b9bd4cf

    • 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

      56986d2abc955f0ae4a61342e91c6784

      SHA1

      d9d67d925c1ee9bd2830866a460f987dfa63afd2

      SHA256

      bc96516a7e9238a93c6c3657efd09be2ceac6af5fc8ecce96d395d947eb4dd84

      SHA512

      14c016b7a11f0bcd994bc0a417094df08bd1d51b5f3c37ab1d366023cbe23b52c81a58ba0398b77d842b4084b558de630c320b44a19f8a933a9ef15cef74e412

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

      242B

      MD5

      89415f4ad0f8395a329783d200e00b7d

      SHA1

      cc97cb3b569d4f009aecc45adb4fd5e7f3a50a28

      SHA256

      3f4865f3479c61d705bc58ef7117aaa3f6f514f5f8403f218962e80132742f0d

      SHA512

      b28bacd994611a120743f98833cf868000fc8d6a080fc8556b7d0ad4b1f06e8e7a52335e7398d80eec8d9fe2b046cad21b1ac910e2c34bb2f06dd770a61883ee

    • C:\Windows\Temp\Cab908F.tmp
      Filesize

      29KB

      MD5

      d59a6b36c5a94916241a3ead50222b6f

      SHA1

      e274e9486d318c383bc4b9812844ba56f0cff3c6

      SHA256

      a38d01d3f024e626d579cf052ac3bd4260bb00c34bc6085977a5f4135ab09b53

      SHA512

      17012307955fef045e7c13bf0613bd40df27c29778ba6572640b76c18d379e02dc478e855c9276737363d0ad09b9a94f2adaa85da9c77ebb3c2d427aa68e2489

    • C:\Windows\Temp\Tar9289.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/592-71-0x0000000000850000-0x0000000000951000-memory.dmp
      Filesize

      1.0MB

    • memory/592-72-0x00000000009D0000-0x0000000000A2E000-memory.dmp
      Filesize

      376KB

    • memory/856-78-0x0000000000940000-0x000000000098D000-memory.dmp
      Filesize

      308KB

    • memory/856-79-0x00000000013A0000-0x0000000001412000-memory.dmp
      Filesize

      456KB

    • memory/856-65-0x0000000000940000-0x000000000098D000-memory.dmp
      Filesize

      308KB

    • memory/856-82-0x0000000000940000-0x000000000098D000-memory.dmp
      Filesize

      308KB

    • memory/856-63-0x00000000013A0000-0x0000000001412000-memory.dmp
      Filesize

      456KB

    • memory/856-62-0x0000000000940000-0x000000000098D000-memory.dmp
      Filesize

      308KB

    • memory/1116-80-0x0000000000440000-0x00000000004B2000-memory.dmp
      Filesize

      456KB

    • memory/1116-90-0x00000000004E0000-0x00000000004FB000-memory.dmp
      Filesize

      108KB

    • memory/1116-91-0x0000000002BA0000-0x0000000002CAA000-memory.dmp
      Filesize

      1.0MB

    • memory/1116-92-0x0000000000520000-0x0000000000540000-memory.dmp
      Filesize

      128KB

    • memory/1116-93-0x0000000000540000-0x000000000055B000-memory.dmp
      Filesize

      108KB

    • memory/1116-89-0x0000000000440000-0x00000000004B2000-memory.dmp
      Filesize

      456KB

    • memory/1116-84-0x0000000000440000-0x00000000004B2000-memory.dmp
      Filesize

      456KB

    • memory/1116-83-0x0000000000440000-0x00000000004B2000-memory.dmp
      Filesize

      456KB

    • memory/1116-70-0x0000000000440000-0x00000000004B2000-memory.dmp
      Filesize

      456KB

    • memory/1116-67-0x0000000000440000-0x00000000004B2000-memory.dmp
      Filesize

      456KB

    • memory/1116-66-0x0000000000060000-0x00000000000AD000-memory.dmp
      Filesize

      308KB

    • memory/1116-249-0x0000000002BA0000-0x0000000002CAA000-memory.dmp
      Filesize

      1.0MB