Analysis

  • max time kernel
    149s
  • max time network
    151s
  • 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

    dc719929115e50ed4383bcc7f7182be3.exe

  • Size

    312KB

  • MD5

    dc719929115e50ed4383bcc7f7182be3

  • SHA1

    562e69bdf814c156872fd6ad6a3d0116b0304516

  • SHA256

    5b0708551a5c3cf9932c8aea5e890e3f2abe7b7b5911cefebc6155d20692e365

  • SHA512

    34b1dda47ff7a20052f582f4874dc35f4e768558baf8727419d5f91ec2f8c6e28d2a6bc0253975e6bac5d45edfa1edd09aabc5339d2caade73418b73096b9404

  • SSDEEP

    6144:E4PWLN3m+XeeqeO0UQeQ8KbLVHqAQg5jIQspEPn:6aeqeO0UQB8KFHqAYpEPn

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: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: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:1336
    • C:\Users\Admin\AppData\Local\Temp\dc719929115e50ed4383bcc7f7182be3.exe
      "C:\Users\Admin\AppData\Local\Temp\dc719929115e50ed4383bcc7f7182be3.exe"
      1⤵
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1304
      • C:\Users\Admin\AppData\Local\Temp\dc719929115e50ed4383bcc7f7182be3.exe
        "C:\Users\Admin\AppData\Local\Temp\dc719929115e50ed4383bcc7f7182be3.exe" -h
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:1276
    • 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:608
      • 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:1168

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

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

      Filesize

      557KB

      MD5

      76c3dbb1e9fea62090cdf53dadcbe28e

      SHA1

      d44b32d04adc810c6df258be85dc6b62bd48a307

      SHA256

      556fd54e5595d222cfa2bd353afa66d8d4d1fbb3003afed604672fceae991860

      SHA512

      de4ea57497cf26237430880742f59e8d2a0ac7e7a0b09ed7be590f36fbd08c9ced0ffe46eb69ec2215a9cff55720f24fffcae752cd282250b4da6b75a30b3a1b

    • 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

      af1c6ac0aae3f8b567d795240a74f078

      SHA1

      f4686b1925b80727df1c6953f6befa2f5cca74ba

      SHA256

      666e8e0e92060005ca4e6269dde462d64589fb800c13a5f4b172e6274f38efb0

      SHA512

      b83b46cf34eeecc5b5873e8404331888452a4dd453ef1d5d0265dc1277004e80df00dbcfccd0cf32f17c3c595f578ad739eda02bd6fd10db3d64945af7403223

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

      Filesize

      242B

      MD5

      7752b1bee2e70b160fce4c05e7d7dce7

      SHA1

      d4162be28b5de16036d416a00bab9f3b01d02b19

      SHA256

      6d8e1f33b87b1e787bb272921a0abd87feb21a8626e0f63ead1ffff86a69fdb3

      SHA512

      61964d5feaf2ecf15dca318ad1b0caed67b416d147d4818fe483a004cffb8803f8279eba35f1b37077cd358daf714eb2597a6a0b1b87b4d58f199be181531b3f

    • C:\Windows\Temp\Cab70A1.tmp

      Filesize

      29KB

      MD5

      d59a6b36c5a94916241a3ead50222b6f

      SHA1

      e274e9486d318c383bc4b9812844ba56f0cff3c6

      SHA256

      a38d01d3f024e626d579cf052ac3bd4260bb00c34bc6085977a5f4135ab09b53

      SHA512

      17012307955fef045e7c13bf0613bd40df27c29778ba6572640b76c18d379e02dc478e855c9276737363d0ad09b9a94f2adaa85da9c77ebb3c2d427aa68e2489

    • C:\Windows\Temp\Tar7385.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/856-62-0x0000000000830000-0x000000000087D000-memory.dmp

      Filesize

      308KB

    • memory/856-63-0x0000000000BE0000-0x0000000000C52000-memory.dmp

      Filesize

      456KB

    • memory/856-68-0x0000000000830000-0x000000000087D000-memory.dmp

      Filesize

      308KB

    • memory/856-69-0x0000000000BE0000-0x0000000000C52000-memory.dmp

      Filesize

      456KB

    • memory/1168-65-0x0000000000A00000-0x0000000000B01000-memory.dmp

      Filesize

      1.0MB

    • memory/1168-74-0x00000000002F0000-0x000000000034E000-memory.dmp

      Filesize

      376KB

    • memory/1168-66-0x00000000002F0000-0x000000000034E000-memory.dmp

      Filesize

      376KB

    • memory/1336-89-0x0000000002070000-0x000000000208B000-memory.dmp

      Filesize

      108KB

    • memory/1336-83-0x0000000000430000-0x00000000004A2000-memory.dmp

      Filesize

      456KB

    • memory/1336-91-0x0000000002A80000-0x0000000002B8A000-memory.dmp

      Filesize

      1.0MB

    • memory/1336-92-0x0000000002090000-0x00000000020B0000-memory.dmp

      Filesize

      128KB

    • memory/1336-93-0x00000000020D0000-0x00000000020EB000-memory.dmp

      Filesize

      108KB

    • memory/1336-82-0x0000000000430000-0x00000000004A2000-memory.dmp

      Filesize

      456KB

    • memory/1336-75-0x0000000000430000-0x00000000004A2000-memory.dmp

      Filesize

      456KB

    • memory/1336-90-0x0000000000430000-0x00000000004A2000-memory.dmp

      Filesize

      456KB

    • memory/1336-71-0x0000000000430000-0x00000000004A2000-memory.dmp

      Filesize

      456KB

    • memory/1336-70-0x00000000000E0000-0x000000000012D000-memory.dmp

      Filesize

      308KB

    • memory/1336-84-0x0000000000430000-0x00000000004A2000-memory.dmp

      Filesize

      456KB

    • memory/1336-249-0x0000000002070000-0x000000000208B000-memory.dmp

      Filesize

      108KB

    • memory/1336-250-0x0000000002A80000-0x0000000002B8A000-memory.dmp

      Filesize

      1.0MB