Analysis

  • max time kernel
    150s
  • max time network
    116s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    25-02-2023 01:37

General

  • Target

    0a5d832f3594465625f855e63075362cf73ef323fc32964e73327aa6a1030584.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 25 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:832
      • 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:1844
    • C:\Users\Admin\AppData\Local\Temp\0a5d832f3594465625f855e63075362cf73ef323fc32964e73327aa6a1030584.exe
      "C:\Users\Admin\AppData\Local\Temp\0a5d832f3594465625f855e63075362cf73ef323fc32964e73327aa6a1030584.exe"
      1⤵
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1968
      • C:\Users\Admin\AppData\Local\Temp\0a5d832f3594465625f855e63075362cf73ef323fc32964e73327aa6a1030584.exe
        "C:\Users\Admin\AppData\Local\Temp\0a5d832f3594465625f855e63075362cf73ef323fc32964e73327aa6a1030584.exe" -h
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:1680
    • 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:2028
      • 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:1612

    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

      58441c8b2b7c38918b070e3b4bf11e50

      SHA1

      d15fa158e48d4cb828de3ff992b07630d9121061

      SHA256

      5d298bc962d497e56e15d6cd9888ae8c4799b35035f7ef1037ff3b8987225884

      SHA512

      d347f6b44e8cab23367bfb16ee23da3cc60acbbc0725dd88cb4d315aa9314d59f1d4fa8f711021ada104595f7e1db45e29cc742be8912ae39673148ea10e6cd5

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

      242B

      MD5

      3675d69e065edbfc18c555c0a337a32b

      SHA1

      b5bd1fe85afd29fe3906c2f50af2e9573e0a2af8

      SHA256

      80a7d818899015c962dc61b2851214ac8e2491da2925103a82eb42a82a132a83

      SHA512

      ac86d94110d95a29fc1b3b52a523bd3d2fdfa5ebcdbe2f752b4e48dd8b8e2a043e2a638408556286634f610632e5bbd2d7f95de02c6da5be866c299e9901bb42

    • C:\Windows\Temp\CabCA83.tmp
      Filesize

      29KB

      MD5

      d59a6b36c5a94916241a3ead50222b6f

      SHA1

      e274e9486d318c383bc4b9812844ba56f0cff3c6

      SHA256

      a38d01d3f024e626d579cf052ac3bd4260bb00c34bc6085977a5f4135ab09b53

      SHA512

      17012307955fef045e7c13bf0613bd40df27c29778ba6572640b76c18d379e02dc478e855c9276737363d0ad09b9a94f2adaa85da9c77ebb3c2d427aa68e2489

    • C:\Windows\Temp\TarCC9C.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/832-77-0x0000000000900000-0x000000000094D000-memory.dmp
      Filesize

      308KB

    • memory/832-65-0x0000000000900000-0x000000000094D000-memory.dmp
      Filesize

      308KB

    • memory/832-62-0x0000000000900000-0x000000000094D000-memory.dmp
      Filesize

      308KB

    • memory/832-78-0x0000000000B20000-0x0000000000B92000-memory.dmp
      Filesize

      456KB

    • memory/832-63-0x0000000000B20000-0x0000000000B92000-memory.dmp
      Filesize

      456KB

    • memory/832-81-0x0000000000900000-0x000000000094D000-memory.dmp
      Filesize

      308KB

    • memory/1612-67-0x0000000000A90000-0x0000000000B91000-memory.dmp
      Filesize

      1.0MB

    • memory/1612-71-0x00000000008B0000-0x000000000090E000-memory.dmp
      Filesize

      376KB

    • memory/1844-90-0x0000000000410000-0x0000000000430000-memory.dmp
      Filesize

      128KB

    • memory/1844-87-0x00000000003F0000-0x000000000040B000-memory.dmp
      Filesize

      108KB

    • memory/1844-89-0x0000000002FB0000-0x00000000030BA000-memory.dmp
      Filesize

      1.0MB

    • memory/1844-91-0x0000000001CE0000-0x0000000001CFB000-memory.dmp
      Filesize

      108KB

    • memory/1844-80-0x00000000004B0000-0x0000000000522000-memory.dmp
      Filesize

      456KB

    • memory/1844-88-0x00000000004B0000-0x0000000000522000-memory.dmp
      Filesize

      456KB

    • memory/1844-68-0x00000000004B0000-0x0000000000522000-memory.dmp
      Filesize

      456KB

    • memory/1844-66-0x0000000000060000-0x00000000000AD000-memory.dmp
      Filesize

      308KB

    • memory/1844-75-0x00000000004B0000-0x0000000000522000-memory.dmp
      Filesize

      456KB

    • memory/1844-82-0x00000000004B0000-0x0000000000522000-memory.dmp
      Filesize

      456KB

    • memory/1844-76-0x00000000004B0000-0x0000000000522000-memory.dmp
      Filesize

      456KB

    • memory/1844-247-0x00000000003F0000-0x000000000040B000-memory.dmp
      Filesize

      108KB

    • memory/1844-248-0x0000000002FB0000-0x00000000030BA000-memory.dmp
      Filesize

      1.0MB