Analysis

  • max time kernel
    149s
  • max time network
    141s
  • 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

    a3b3e417dc721aaa4fdcaa8f65eef81a.exe

  • Size

    312KB

  • MD5

    a3b3e417dc721aaa4fdcaa8f65eef81a

  • SHA1

    21ea098b035b5fd93037054f59ee506aa66d030c

  • SHA256

    9d6f720f4d9bd455371b863ce479c490ebb437ff53c1635fe7befd5eff30af10

  • SHA512

    10b658b0b440c01bf0d1fe49c5092b82a59ba8c4ebd214b4c7b3fae8f3d8c4d67598154bf53e13fbf80174bf7411b4f12e044832967c528c5f917efe5b6f2585

  • SSDEEP

    6144:E4PWLN3m+XeeqeO0UQeQ8KbLVHqAQg5jIQshEPn:6aeqeO0UQB8KFHqAYhEPn

Malware Config

Signatures

  • Detects PseudoManuscrypt payload 7 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 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: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:828
    • C:\Users\Admin\AppData\Local\Temp\a3b3e417dc721aaa4fdcaa8f65eef81a.exe
      "C:\Users\Admin\AppData\Local\Temp\a3b3e417dc721aaa4fdcaa8f65eef81a.exe"
      1⤵
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1204
      • C:\Users\Admin\AppData\Local\Temp\a3b3e417dc721aaa4fdcaa8f65eef81a.exe
        "C:\Users\Admin\AppData\Local\Temp\a3b3e417dc721aaa4fdcaa8f65eef81a.exe" -h
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:2024
    • 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:1900
      • 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:1812

    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

      1bd81dc243577b6a0c7f93f6bd9ae40b

      SHA1

      9d4e908b53e52c5216ea7746d2e1b33abea9bc1c

      SHA256

      3b667512e2dc899bc4e0d92628a981b4487b9423c6ae3804893a30c67a2de21c

      SHA512

      e7e647733b88c78b8bb6c1951780b2627e2b0b66dc2b29d257f2925d837936bd12eaa56b43c7d59ec663e81fa31ec50f4767de8ab1441c645c0890aec79a8d10

    • 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

      dd9698f7832e82a9a173f41835337903

      SHA1

      ffd73ab0e9720adf7cd31e6215170fa6d76e2f3d

      SHA256

      6b3a430731e67d8f672e0b59a7e3e38e26988b8b55033fc76d464a4928b3c77d

      SHA512

      6476659f809e6f6d91cae535831e7702d418b6fa3f50786465bd7d58df0eb820d1919f63d3106ce55899564cfea6458dec6220e6377401914ada91e7cb907f8d

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

      242B

      MD5

      184973687b3021420b93b85c6fc0b650

      SHA1

      299c42f820547d324bee9457a86d1d3e5db10036

      SHA256

      a838089bf55ddde467bbb7fa0a2deb9eb43ba15e4ea7acdf126fc6b2792b8588

      SHA512

      a338898a82944bbde45af4196a3ad8ece7600192e09af52aa5676c418c114bf2c2c5280c6e52cc957afaca616f303299bbce93a4048f5ddd6516a4b3e2a841c2

    • C:\Windows\Temp\Cab4C7E.tmp
      Filesize

      29KB

      MD5

      d59a6b36c5a94916241a3ead50222b6f

      SHA1

      e274e9486d318c383bc4b9812844ba56f0cff3c6

      SHA256

      a38d01d3f024e626d579cf052ac3bd4260bb00c34bc6085977a5f4135ab09b53

      SHA512

      17012307955fef045e7c13bf0613bd40df27c29778ba6572640b76c18d379e02dc478e855c9276737363d0ad09b9a94f2adaa85da9c77ebb3c2d427aa68e2489

    • C:\Windows\Temp\Tar4E68.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/828-96-0x0000000001DF0000-0x0000000001E0B000-memory.dmp
      Filesize

      108KB

    • memory/828-66-0x0000000000060000-0x00000000000AD000-memory.dmp
      Filesize

      308KB

    • memory/828-73-0x0000000000420000-0x0000000000492000-memory.dmp
      Filesize

      456KB

    • memory/828-241-0x0000000002BE0000-0x0000000002CEA000-memory.dmp
      Filesize

      1.0MB

    • memory/828-76-0x0000000000420000-0x0000000000492000-memory.dmp
      Filesize

      456KB

    • memory/828-81-0x0000000000420000-0x0000000000492000-memory.dmp
      Filesize

      456KB

    • memory/828-82-0x0000000000560000-0x000000000057B000-memory.dmp
      Filesize

      108KB

    • memory/828-83-0x0000000002BE0000-0x0000000002CEA000-memory.dmp
      Filesize

      1.0MB

    • memory/828-84-0x0000000001DD0000-0x0000000001DF0000-memory.dmp
      Filesize

      128KB

    • memory/828-72-0x0000000000420000-0x0000000000492000-memory.dmp
      Filesize

      456KB

    • memory/828-67-0x0000000000420000-0x0000000000492000-memory.dmp
      Filesize

      456KB

    • memory/852-63-0x0000000000B20000-0x0000000000B92000-memory.dmp
      Filesize

      456KB

    • memory/852-65-0x0000000000830000-0x000000000087D000-memory.dmp
      Filesize

      308KB

    • memory/852-62-0x0000000000830000-0x000000000087D000-memory.dmp
      Filesize

      308KB

    • memory/852-74-0x0000000000B20000-0x0000000000B92000-memory.dmp
      Filesize

      456KB

    • memory/1812-68-0x0000000001EA0000-0x0000000001FA1000-memory.dmp
      Filesize

      1.0MB

    • memory/1812-69-0x00000000002C0000-0x000000000031E000-memory.dmp
      Filesize

      376KB