Analysis

  • max time kernel
    118s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    24-05-2024 08:11

General

  • Target

    47e6542e234e5ffed88732519f19008c.bin.exe

  • Size

    680KB

  • MD5

    47e6542e234e5ffed88732519f19008c

  • SHA1

    b3dd01bf81d5b4b9595c13032d0fc8006dbc7e64

  • SHA256

    ae55dc186e2373b964f1d84fd51aa7692fdb2994cc163128b97631c3ba7f7066

  • SHA512

    98e4ddd035c81623ba2dcc5fc4ca58da3aa6ba10c7bce25ab0a00e7737c11152d6a77507c859f7f369be8fc456189acb5fe90a55064a5bf790e06662f3b589ce

  • SSDEEP

    12288:+Xplx92r2O9Ycny57ohEDGtnXCkgybsySO+TbQnpNwMfgriFg3ikzA6pVPbi81kR:oFTCy5XityUWXUNwMfgrV3ikz8

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

198.55.115.39:6606

198.55.115.39:7707

198.55.115.39:8808

Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    true

  • install_file

    Wndfnder.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 3 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Delays execution with timeout.exe 1 IoCs
  • Modifies system certificate store 2 TTPs 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 54 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\47e6542e234e5ffed88732519f19008c.bin.exe
    "C:\Users\Admin\AppData\Local\Temp\47e6542e234e5ffed88732519f19008c.bin.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2240
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GGyIJkQ.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:888
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GGyIJkQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC382.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2568
    • C:\Users\Admin\AppData\Local\Temp\47e6542e234e5ffed88732519f19008c.bin.exe
      "C:\Users\Admin\AppData\Local\Temp\47e6542e234e5ffed88732519f19008c.bin.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1488
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Wndfnder" /tr '"C:\Users\Admin\AppData\Roaming\Wndfnder.exe"' & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1768
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /create /f /sc onlogon /rl highest /tn "Wndfnder" /tr '"C:\Users\Admin\AppData\Roaming\Wndfnder.exe"'
          4⤵
          • Creates scheduled task(s)
          PID:2948
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpD74C.tmp.bat""
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:1628
        • C:\Windows\SysWOW64\timeout.exe
          timeout 3
          4⤵
          • Delays execution with timeout.exe
          PID:2812
        • C:\Users\Admin\AppData\Roaming\Wndfnder.exe
          "C:\Users\Admin\AppData\Roaming\Wndfnder.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2728
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GGyIJkQ.exe"
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:1700
          • C:\Windows\SysWOW64\schtasks.exe
            "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GGyIJkQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1AF0.tmp"
            5⤵
            • Creates scheduled task(s)
            PID:2008
          • C:\Users\Admin\AppData\Roaming\Wndfnder.exe
            "C:\Users\Admin\AppData\Roaming\Wndfnder.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            PID:1312

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

    Filesize

    68KB

    MD5

    29f65ba8e88c063813cc50a4ea544e93

    SHA1

    05a7040d5c127e68c25d81cc51271ffb8bef3568

    SHA256

    1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

    SHA512

    e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    344B

    MD5

    1a9cd597678a7aa0f83199db58775948

    SHA1

    8cf16906ba9c2f2b56e4f3179102f25a5e7d1556

    SHA256

    56b2391e72a3b217f12a2da5142f5350326d38ab516ed115e0d11593262d30a1

    SHA512

    a0d8c71054f67ff8febbf05ebae05508b18927b80822185052be20151413761540a775db14cca0b678a0b6899a281a93f0dc29c203af8c92dd5fb4766cde8929

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    344B

    MD5

    a95888ca3363a1f587588b7beb03369e

    SHA1

    b18421e30ed1ea2fb89c257f3a568de9962e96bb

    SHA256

    602509151a81e75dd2f62daac14d6436a76ac7f23b0898838ac8db4457377e1f

    SHA512

    81f615db1bf3d67363884a92168d20b34746a46437054424c3a749fcd62b222b9fafac3cf52eb85a14263317fe1ae5da490d0d4fafa5c3a09c551dc1668205b1

  • C:\Users\Admin\AppData\Local\Temp\Tar87FC.tmp

    Filesize

    177KB

    MD5

    435a9ac180383f9fa094131b173a2f7b

    SHA1

    76944ea657a9db94f9a4bef38f88c46ed4166983

    SHA256

    67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

    SHA512

    1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

  • C:\Users\Admin\AppData\Local\Temp\tmpC382.tmp

    Filesize

    1KB

    MD5

    618f7119402a79c83e3562f7832d19d9

    SHA1

    f2bb01ecdf133ea122654676ae6110c8c33790d0

    SHA256

    1f22e570e2acd39d6924697188d7f8bdacca49294af1a2a4c48e17eb64f316db

    SHA512

    191a058b7013967b62b0e1365cdaf57b6aeb7b24155708fcb7ddf401fba71788a94472a0bf2bdadd652ee42a9189676beb0a5c6e37741d14e4b1242509283013

  • C:\Users\Admin\AppData\Local\Temp\tmpD74C.tmp.bat

    Filesize

    152B

    MD5

    2edb820866461db6ba6a7ec775c82a08

    SHA1

    0497edd26a6ddd6161ae2b9d49a97e4bc66320f2

    SHA256

    451e170ec973b79e7255da184e69e487c185d5ff667ed7ea9e69fefabbde7cc1

    SHA512

    c72c4af40d6c48728e8e47d2aa0a8c7f69c6bc6aa525e5a7b3b825c902674a1229d0cb58a5b022cfc9c2d8697907a3dd6a15290162684896a564f3fd5de58683

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\97PXKFUSXQAWL1PXXTI6.temp

    Filesize

    7KB

    MD5

    ff850e53e968aadc602dd2c55bcad54a

    SHA1

    309d8f751d7d0ad4bb467ea414bc46e214b3ded0

    SHA256

    ee8beb8dca4d781ff595acc8fb0bcdfc25718999c2f6b7e29ceddc912b9959d8

    SHA512

    7782f163369eb95e873156c581f345e7d557532d2b88817e9f30d8d4effc97ad76fee8a3659e4123eca249e0126fec88ba807c528715000473d473325ac99dfd

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

    Filesize

    7KB

    MD5

    89cdc4434c0b904c5f5375a709a66bac

    SHA1

    b8c5a263cde79cd67259ee641779dc4695467152

    SHA256

    67676d2b51041455a06cfad121f4e04e6d3381ba5109cbafd51496861117fc51

    SHA512

    cf92f61acb03ac7a35059ba67a5db0f995a3a462b3fb1004edc06ff8eb1f5626a78011eda020e9efc6010cd19a042a67f0a94850be273a7fc0338f84f793b9a5

  • C:\Users\Admin\AppData\Roaming\Wndfnder.exe

    Filesize

    680KB

    MD5

    47e6542e234e5ffed88732519f19008c

    SHA1

    b3dd01bf81d5b4b9595c13032d0fc8006dbc7e64

    SHA256

    ae55dc186e2373b964f1d84fd51aa7692fdb2994cc163128b97631c3ba7f7066

    SHA512

    98e4ddd035c81623ba2dcc5fc4ca58da3aa6ba10c7bce25ab0a00e7737c11152d6a77507c859f7f369be8fc456189acb5fe90a55064a5bf790e06662f3b589ce

  • memory/1312-218-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1312-221-0x0000000000400000-0x0000000000432000-memory.dmp

    Filesize

    200KB

  • memory/1312-224-0x0000000000400000-0x0000000000432000-memory.dmp

    Filesize

    200KB

  • memory/1488-114-0x0000000000400000-0x0000000000432000-memory.dmp

    Filesize

    200KB

  • memory/1488-118-0x0000000000400000-0x0000000000432000-memory.dmp

    Filesize

    200KB

  • memory/1488-108-0x0000000000400000-0x0000000000432000-memory.dmp

    Filesize

    200KB

  • memory/1488-112-0x0000000000400000-0x0000000000432000-memory.dmp

    Filesize

    200KB

  • memory/1488-110-0x0000000000400000-0x0000000000432000-memory.dmp

    Filesize

    200KB

  • memory/1488-119-0x0000000000400000-0x0000000000432000-memory.dmp

    Filesize

    200KB

  • memory/1488-117-0x0000000000400000-0x0000000000432000-memory.dmp

    Filesize

    200KB

  • memory/1488-116-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2240-122-0x0000000074B20000-0x000000007520E000-memory.dmp

    Filesize

    6.9MB

  • memory/2240-0-0x0000000074B2E000-0x0000000074B2F000-memory.dmp

    Filesize

    4KB

  • memory/2240-102-0x0000000008A30000-0x0000000008AA4000-memory.dmp

    Filesize

    464KB

  • memory/2240-101-0x0000000000AC0000-0x0000000000AD0000-memory.dmp

    Filesize

    64KB

  • memory/2240-100-0x0000000000A50000-0x0000000000A6A000-memory.dmp

    Filesize

    104KB

  • memory/2240-9-0x0000000074B20000-0x000000007520E000-memory.dmp

    Filesize

    6.9MB

  • memory/2240-1-0x00000000013A0000-0x000000000144C000-memory.dmp

    Filesize

    688KB

  • memory/2728-135-0x0000000001380000-0x000000000142C000-memory.dmp

    Filesize

    688KB