Analysis

  • max time kernel
    143s
  • max time network
    175s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19-09-2022 16:39

General

  • Target

    7f8c572116c3638d9904a1e076c2b960631f269e8f21aff09b61055197e00638.exe

  • Size

    373KB

  • MD5

    ea3ac0aac395eadfe6362a9bdd36903f

  • SHA1

    10f05cd28957eaaf375b25d7675c4cb894e91983

  • SHA256

    7f8c572116c3638d9904a1e076c2b960631f269e8f21aff09b61055197e00638

  • SHA512

    272658284437f429e6b390d5d65df1b1a229b1a04678963aa7eed972c5a89560d445be4e4be8f2ec99818d561b7890599113011c669abf2909302104fadbda46

  • SSDEEP

    6144:SY94NTudsckh6IeJYr/qcRLT+C8uvQ7ukCGZV+J46E+6mcZpB:R9OisckheJ+PRLT+CfvifCx46EDmcZpB

Malware Config

Signatures

  • Executes dropped EXE 2 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 4 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Installs/modifies Browser Helper Object 2 TTPs 2 IoCs

    BHOs are DLL modules which act as plugins for Internet Explorer.

  • Drops file in System32 directory 7 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Modifies registry class 46 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of SetWindowsHookEx 8 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7f8c572116c3638d9904a1e076c2b960631f269e8f21aff09b61055197e00638.exe
    "C:\Users\Admin\AppData\Local\Temp\7f8c572116c3638d9904a1e076c2b960631f269e8f21aff09b61055197e00638.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1388
    • C:\Users\Admin\AppData\Local\Temp\RarSFX0\rinst.exe
      "C:\Users\Admin\AppData\Local\Temp\RarSFX0\rinst.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4648
      • C:\Windows\SysWOW64\bpk.exe
        C:\Windows\system32\bpk.exe
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Adds Run key to start application
        • Installs/modifies Browser Helper Object
        • Drops file in System32 directory
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        • Suspicious use of SetWindowsHookEx
        PID:2688

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\RarSFX0\bpk.exe

    Filesize

    384KB

    MD5

    ad7b912feb61342311fba650f2b02be7

    SHA1

    bc85139f7544971f72509532ced3b21b33a3c31b

    SHA256

    903e60be5a10acc08ce564bec11a45a2264c4eef68d75822d023c5a776f6920a

    SHA512

    6f9d09ba09892bb84aad8a096d066e721d362d1298a46b408a7d45dc0b7f1403f1873e17e8a8ccf1294087a5c2224834053d876e01bd338ef8e5d46408eea823

  • C:\Users\Admin\AppData\Local\Temp\RarSFX0\bpkhk.dll

    Filesize

    8KB

    MD5

    0c7eab37c47d15a41f41c4b209e79274

    SHA1

    5e4e38d02274362f2ece0fe2cb17d2739df8f70d

    SHA256

    8c1a8485fe05be1d1dd9694cb43cebededd5c97147cb9bddd4e60eb1da570e7b

    SHA512

    10ccd7fd4785788aaea39f64fdd317867e7940d3d741e182418f379851840ddd35c1a27e6f2c5c26f0c385036d17e968fc5b97faa9ff1c0ea6c6d47eda153966

  • C:\Users\Admin\AppData\Local\Temp\RarSFX0\bpkwb.dll

    Filesize

    40KB

    MD5

    81ed65c6eeeb197860cc72a0852d2342

    SHA1

    75eace72cbbd6cfa3bfd2544be684e67eea221c5

    SHA256

    647e9a4cdd56653a08e938c4f03330cdc957845bd583c1f31ade9a5eb8507086

    SHA512

    f1672dd193b2f8ad4771560b5077c466770bc0b0bc45fc1473164036b789daefe826f47779c4454ac446324cc75e274aa9079181e8e4b6dfd50db25cb41794eb

  • C:\Users\Admin\AppData\Local\Temp\RarSFX0\inst.dat

    Filesize

    996B

    MD5

    f0d024be158768932e8e478c36854605

    SHA1

    16d4f38921669e3e37cec4b02127b5c4fc57aaf3

    SHA256

    ca468b1cf639aa678574f8c1d89aa63a8ab3b82bab66ff99ff853896f4271fe4

    SHA512

    50aa3840654670296d2785f77dc1993f5e0f681bb607fff54a7ee58439d867b26d4711ffd9816ce61765c4a91033471cd4b938e60802ed887a59b593976361de

  • C:\Users\Admin\AppData\Local\Temp\RarSFX0\pk.bin

    Filesize

    3KB

    MD5

    64bda3b5360f5a95dfd9baa278f90b21

    SHA1

    abfe88a9efa0860ccb7e2cd4f2400bbd9be0fa0d

    SHA256

    6897d787e9877fbabaf891bad537c0fc7e074debb517d7f8aa5322cf362a58d7

    SHA512

    7d60128c750f823b6cc11ec60e4f72124b080651c139c674b750663275daa06dbd1d15dee52e3c0e0c4a3b2b45c63d9a059c256ea4889480db6bd144a1a9e609

  • C:\Users\Admin\AppData\Local\Temp\RarSFX0\rinst.exe

    Filesize

    16KB

    MD5

    25ca20c1d62da229dc135015cef460e4

    SHA1

    e351fcaee513197a89054d432e6747b3ad372baf

    SHA256

    e07774d73ad137ea9d9eeab564d7844baf523cb26459ac2eae5e631403fcec81

    SHA512

    45aa4f3cd9d91ae1ee9968c72dbcd5ab7d448225928af8283d5e04a64867cb5f940b228de6c753fd27124d3ea3e827c46695bcccc7dc9653efe9670844d7c117

  • C:\Users\Admin\AppData\Local\Temp\RarSFX0\rinst.exe

    Filesize

    16KB

    MD5

    25ca20c1d62da229dc135015cef460e4

    SHA1

    e351fcaee513197a89054d432e6747b3ad372baf

    SHA256

    e07774d73ad137ea9d9eeab564d7844baf523cb26459ac2eae5e631403fcec81

    SHA512

    45aa4f3cd9d91ae1ee9968c72dbcd5ab7d448225928af8283d5e04a64867cb5f940b228de6c753fd27124d3ea3e827c46695bcccc7dc9653efe9670844d7c117

  • C:\Windows\SysWOW64\bpk.exe

    Filesize

    384KB

    MD5

    ada1988031b565e0d529a546ac600aca

    SHA1

    31ea4a318da7193de8a2b11c9c19ea43eb68b18c

    SHA256

    ddeb3dc9271d6d1c1481a10f12b9cb373edd48b165a40bf762f377804dbddcec

    SHA512

    eb386eff5f7c3cf8e789c1c5f09f50a0740a02d865b0be772a2d8ed19ef9aba3c8a783da2165fc366f2d9bbba2135371420a470fa2eae0f65568aac9136e2343

  • C:\Windows\SysWOW64\bpk.exe

    Filesize

    384KB

    MD5

    ada1988031b565e0d529a546ac600aca

    SHA1

    31ea4a318da7193de8a2b11c9c19ea43eb68b18c

    SHA256

    ddeb3dc9271d6d1c1481a10f12b9cb373edd48b165a40bf762f377804dbddcec

    SHA512

    eb386eff5f7c3cf8e789c1c5f09f50a0740a02d865b0be772a2d8ed19ef9aba3c8a783da2165fc366f2d9bbba2135371420a470fa2eae0f65568aac9136e2343

  • C:\Windows\SysWOW64\bpkhk.dll

    Filesize

    8KB

    MD5

    c93434c190b7e1c5b7f8c5c3e95427b4

    SHA1

    723d837180c0e9f572f13098008a80647b504eda

    SHA256

    dc381580da21d22e498862192429f5fff0b1c95fd0e687b259d00c2df5b5a62d

    SHA512

    d8525ba5bebf3700af85712d1f1ebc44d05ba7d62292dab183f9ee300278bfbce207cc21dfdd11f96babf08d348cd47ef66c416b9e0c5881311be01e52e63f8b

  • C:\Windows\SysWOW64\bpkhk.dll

    Filesize

    8KB

    MD5

    c93434c190b7e1c5b7f8c5c3e95427b4

    SHA1

    723d837180c0e9f572f13098008a80647b504eda

    SHA256

    dc381580da21d22e498862192429f5fff0b1c95fd0e687b259d00c2df5b5a62d

    SHA512

    d8525ba5bebf3700af85712d1f1ebc44d05ba7d62292dab183f9ee300278bfbce207cc21dfdd11f96babf08d348cd47ef66c416b9e0c5881311be01e52e63f8b

  • C:\Windows\SysWOW64\bpkhk.dll

    Filesize

    8KB

    MD5

    c93434c190b7e1c5b7f8c5c3e95427b4

    SHA1

    723d837180c0e9f572f13098008a80647b504eda

    SHA256

    dc381580da21d22e498862192429f5fff0b1c95fd0e687b259d00c2df5b5a62d

    SHA512

    d8525ba5bebf3700af85712d1f1ebc44d05ba7d62292dab183f9ee300278bfbce207cc21dfdd11f96babf08d348cd47ef66c416b9e0c5881311be01e52e63f8b

  • C:\Windows\SysWOW64\bpkwb.dll

    Filesize

    40KB

    MD5

    5d6103059981886ee29698ef77006398

    SHA1

    02679e8da4f9c86481d4ae1280b31c73d4682eef

    SHA256

    a2bc198ac23bc884dfdfb5d07824f673557d28493f23d7f86cfba498406a7cfa

    SHA512

    56027d02135d1fa1a711507dd8f2985c45f1c71669a388d2363b9dcb88a85aef8fed9bdf8db56db2923fc62c14d0a0832dda73b7c793ad25268e4fb6d0c8f9c0

  • C:\Windows\SysWOW64\bpkwb.dll

    Filesize

    40KB

    MD5

    5d6103059981886ee29698ef77006398

    SHA1

    02679e8da4f9c86481d4ae1280b31c73d4682eef

    SHA256

    a2bc198ac23bc884dfdfb5d07824f673557d28493f23d7f86cfba498406a7cfa

    SHA512

    56027d02135d1fa1a711507dd8f2985c45f1c71669a388d2363b9dcb88a85aef8fed9bdf8db56db2923fc62c14d0a0832dda73b7c793ad25268e4fb6d0c8f9c0

  • C:\Windows\SysWOW64\bpkwb.dll

    Filesize

    40KB

    MD5

    5d6103059981886ee29698ef77006398

    SHA1

    02679e8da4f9c86481d4ae1280b31c73d4682eef

    SHA256

    a2bc198ac23bc884dfdfb5d07824f673557d28493f23d7f86cfba498406a7cfa

    SHA512

    56027d02135d1fa1a711507dd8f2985c45f1c71669a388d2363b9dcb88a85aef8fed9bdf8db56db2923fc62c14d0a0832dda73b7c793ad25268e4fb6d0c8f9c0

  • C:\Windows\SysWOW64\inst.dat

    Filesize

    996B

    MD5

    f0d024be158768932e8e478c36854605

    SHA1

    16d4f38921669e3e37cec4b02127b5c4fc57aaf3

    SHA256

    ca468b1cf639aa678574f8c1d89aa63a8ab3b82bab66ff99ff853896f4271fe4

    SHA512

    50aa3840654670296d2785f77dc1993f5e0f681bb607fff54a7ee58439d867b26d4711ffd9816ce61765c4a91033471cd4b938e60802ed887a59b593976361de

  • C:\Windows\SysWOW64\pk.bin

    Filesize

    3KB

    MD5

    481eacac626b1ebf2c7bb87684ca68e4

    SHA1

    0b5358949f1ed8ee7d36f7eceec1751b7731e0ec

    SHA256

    970e0f1f678e8f82b276d713ad58d2267472e7fb32bf666d35579d949dbf6d01

    SHA512

    c7e827e65049888d6d913ad3c387ff702a6a2840163335f8d8c4b144736cfdb084d3c027ace2adee016c5a2996eef2c55fa016a338691ad9c77d20b2f9a374e2

  • C:\Windows\SysWOW64\rinst.exe

    Filesize

    16KB

    MD5

    25ca20c1d62da229dc135015cef460e4

    SHA1

    e351fcaee513197a89054d432e6747b3ad372baf

    SHA256

    e07774d73ad137ea9d9eeab564d7844baf523cb26459ac2eae5e631403fcec81

    SHA512

    45aa4f3cd9d91ae1ee9968c72dbcd5ab7d448225928af8283d5e04a64867cb5f940b228de6c753fd27124d3ea3e827c46695bcccc7dc9653efe9670844d7c117

  • memory/2688-151-0x0000000000B01000-0x0000000000B05000-memory.dmp

    Filesize

    16KB