Analysis

  • max time kernel
    41s
  • max time network
    44s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    01-10-2022 11:16

General

  • Target

    Build.bat

  • Size

    741B

  • MD5

    4e46e28b2e61643f6af70a8b19e5cb1f

  • SHA1

    804a1d0c4a280b18e778e4b97f85562fa6d5a4e6

  • SHA256

    8e83a1727696ced618289f79674b97305d88beeeabf46bd25fc77ac53c1ae339

  • SHA512

    009b17b515ff0ea612e54d8751eef07f1e2b54db07e6cd69a95e7adf775f3c79a0ea91bff2fe593f2314807fdc00c75d80f1807b7dbe90f0fcf94607e675047b

Score
1/10

Malware Config

Signatures

  • Suspicious behavior: CmdExeWriteProcessMemorySpam 7 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Windows\system32\cmd.exe
    cmd /c "C:\Users\Admin\AppData\Local\Temp\Build.bat"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1424
    • C:\Users\Admin\AppData\Local\Temp\keygen.exe
      keygen -path C:\Users\Admin\AppData\Local\Temp\Build -pubkey pub.key -privkey priv.key
      2⤵
      • Suspicious behavior: CmdExeWriteProcessMemorySpam
      PID:1340
    • C:\Users\Admin\AppData\Local\Temp\builder.exe
      builder -type dec -privkey C:\Users\Admin\AppData\Local\Temp\Build\priv.key -config config.json -ofile C:\Users\Admin\AppData\Local\Temp\Build\LB3Decryptor.exe
      2⤵
      • Suspicious behavior: CmdExeWriteProcessMemorySpam
      PID:616
    • C:\Users\Admin\AppData\Local\Temp\builder.exe
      builder -type enc -exe -pubkey C:\Users\Admin\AppData\Local\Temp\Build\pub.key -config config.json -ofile C:\Users\Admin\AppData\Local\Temp\Build\LB3.exe
      2⤵
      • Suspicious behavior: CmdExeWriteProcessMemorySpam
      PID:1528
    • C:\Users\Admin\AppData\Local\Temp\builder.exe
      builder -type enc -exe -pass -pubkey C:\Users\Admin\AppData\Local\Temp\Build\pub.key -config config.json -ofile C:\Users\Admin\AppData\Local\Temp\Build\LB3_pass.exe
      2⤵
      • Suspicious behavior: CmdExeWriteProcessMemorySpam
      PID:944
    • C:\Users\Admin\AppData\Local\Temp\builder.exe
      builder -type enc -dll -pubkey C:\Users\Admin\AppData\Local\Temp\Build\pub.key -config config.json -ofile C:\Users\Admin\AppData\Local\Temp\Build\LB3_Rundll32.dll
      2⤵
      • Suspicious behavior: CmdExeWriteProcessMemorySpam
      PID:940
    • C:\Users\Admin\AppData\Local\Temp\builder.exe
      builder -type enc -dll -pass -pubkey C:\Users\Admin\AppData\Local\Temp\Build\pub.key -config config.json -ofile C:\Users\Admin\AppData\Local\Temp\Build\LB3_Rundll32_pass.dll
      2⤵
      • Suspicious behavior: CmdExeWriteProcessMemorySpam
      PID:956
    • C:\Users\Admin\AppData\Local\Temp\builder.exe
      builder -type enc -ref -pubkey C:\Users\Admin\AppData\Local\Temp\Build\pub.key -config config.json -ofile C:\Users\Admin\AppData\Local\Temp\Build\LB3_ReflectiveDll_DllMain.dll
      2⤵
      • Suspicious behavior: CmdExeWriteProcessMemorySpam
      PID:1736

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\Build\priv.key
    Filesize

    344B

    MD5

    95fb0b8f42833da0b1c01079b265b46d

    SHA1

    d6002d01fb128bca8484432c79d83ff123e74d73

    SHA256

    bc06b43e11f975d49097847188e63c8424973712db75fc97791c27c111600cd9

    SHA512

    83e61567b91286c2ed4016f5e8bc01b5edbceb34fa84a5def056ab74541eb3051a8c6128b5e3385de3c0573063b3bda855048190a0896ca52ff19f8fec0e9544

  • C:\Users\Admin\AppData\Local\Temp\Build\pub.key
    Filesize

    344B

    MD5

    40d79d57406c0224a32b4c90d301227f

    SHA1

    c7ea6cd5e25d84d4e6cbd4cb9d56cae0e5ee4164

    SHA256

    3095f4d9488249ebc7f3e02bbefdce6f44d4e984ebb34540e1e311eea2fb2e2e

    SHA512

    8bddd23ba28b8061d35e8cf667039d0720ca28b913077f035876963b2668914812f0caaf20d893a40637e2aacc28806269c94af6f17804f421ab03b2b9ef5c13

  • memory/616-56-0x0000000000000000-mapping.dmp
  • memory/940-64-0x0000000000000000-mapping.dmp
  • memory/944-62-0x0000000000000000-mapping.dmp
  • memory/956-66-0x0000000000000000-mapping.dmp
  • memory/1340-54-0x0000000000000000-mapping.dmp
  • memory/1340-55-0x0000000076151000-0x0000000076153000-memory.dmp
    Filesize

    8KB

  • memory/1528-59-0x0000000000000000-mapping.dmp
  • memory/1736-68-0x0000000000000000-mapping.dmp