Analysis

  • max time kernel
    169s
  • max time network
    201s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    08/05/2022, 06:35

General

  • Target

    3ac92596215d32932cf4e2c59cfed2665d23a5a5acd5c7355da04271132203ca.exe

  • Size

    2.1MB

  • MD5

    b2feac6aa6a89365b3f010a0cd34147d

  • SHA1

    2faf499f54dbeb1dd46ab018b9f31b566711c432

  • SHA256

    3ac92596215d32932cf4e2c59cfed2665d23a5a5acd5c7355da04271132203ca

  • SHA512

    d96bf8aebfc1467d0380f41652e98a56b39f8252843b29024b69d7ad44121ab876fea5d752a49b9b6f5cf24e2d791ececdc7d50092e7f2d7ab1586fd97742349

Malware Config

Signatures

  • BitRAT

    BitRAT is a remote access tool written in C++ and uses leaked source code from other families.

  • BitRAT Payload 2 IoCs
  • Executes dropped EXE 2 IoCs
  • UPX packed file 8 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 15 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 31 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3ac92596215d32932cf4e2c59cfed2665d23a5a5acd5c7355da04271132203ca.exe
    "C:\Users\Admin\AppData\Local\Temp\3ac92596215d32932cf4e2c59cfed2665d23a5a5acd5c7355da04271132203ca.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1004
    • C:\Users\Admin\AppData\Roaming\Fehulu\Cavqm.exe
      "C:\Users\Admin\AppData\Roaming\Fehulu\Cavqm.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2032
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1920
      • C:\Users\Admin\AppData\Roaming\Fehulu\Cavqm.exe
        "C:\Users\Admin\AppData\Roaming\Fehulu\Cavqm.exe"
        3⤵
        • Executes dropped EXE
        PID:1540
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe"
        3⤵
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:1156

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Roaming\Fehulu\Cavqm.exe

          Filesize

          2.1MB

          MD5

          b2feac6aa6a89365b3f010a0cd34147d

          SHA1

          2faf499f54dbeb1dd46ab018b9f31b566711c432

          SHA256

          3ac92596215d32932cf4e2c59cfed2665d23a5a5acd5c7355da04271132203ca

          SHA512

          d96bf8aebfc1467d0380f41652e98a56b39f8252843b29024b69d7ad44121ab876fea5d752a49b9b6f5cf24e2d791ececdc7d50092e7f2d7ab1586fd97742349

        • C:\Users\Admin\AppData\Roaming\Fehulu\Cavqm.exe

          Filesize

          2.1MB

          MD5

          b2feac6aa6a89365b3f010a0cd34147d

          SHA1

          2faf499f54dbeb1dd46ab018b9f31b566711c432

          SHA256

          3ac92596215d32932cf4e2c59cfed2665d23a5a5acd5c7355da04271132203ca

          SHA512

          d96bf8aebfc1467d0380f41652e98a56b39f8252843b29024b69d7ad44121ab876fea5d752a49b9b6f5cf24e2d791ececdc7d50092e7f2d7ab1586fd97742349

        • C:\Users\Admin\AppData\Roaming\Fehulu\Cavqm.exe

          Filesize

          2.1MB

          MD5

          b2feac6aa6a89365b3f010a0cd34147d

          SHA1

          2faf499f54dbeb1dd46ab018b9f31b566711c432

          SHA256

          3ac92596215d32932cf4e2c59cfed2665d23a5a5acd5c7355da04271132203ca

          SHA512

          d96bf8aebfc1467d0380f41652e98a56b39f8252843b29024b69d7ad44121ab876fea5d752a49b9b6f5cf24e2d791ececdc7d50092e7f2d7ab1586fd97742349

        • C:\Users\Admin\AppData\Roaming\Fehulu\Ojtkmq.url

          Filesize

          168B

          MD5

          1745f298ce618adb5c667e42b2e1b5c9

          SHA1

          66ab7e9f4dc3780fcc0b6d0ee31cb0259f2d2060

          SHA256

          9bcd11157e69126e6b191cfaee6e51104b364347fe6a20dcb64bce8bc47a1b74

          SHA512

          13bf2e06b196eb914c693ee28b9d7c03932026760f163248ca129f30178b1054d1bc6e99294e180d1b7ae1656f062a5ebaca6ef10ce8f189d8afb8dc67df094c

        • \Users\Admin\AppData\Roaming\Fehulu\Cavqm.exe

          Filesize

          2.1MB

          MD5

          b2feac6aa6a89365b3f010a0cd34147d

          SHA1

          2faf499f54dbeb1dd46ab018b9f31b566711c432

          SHA256

          3ac92596215d32932cf4e2c59cfed2665d23a5a5acd5c7355da04271132203ca

          SHA512

          d96bf8aebfc1467d0380f41652e98a56b39f8252843b29024b69d7ad44121ab876fea5d752a49b9b6f5cf24e2d791ececdc7d50092e7f2d7ab1586fd97742349

        • memory/1004-55-0x0000000075F21000-0x0000000075F23000-memory.dmp

          Filesize

          8KB

        • memory/1004-56-0x0000000000950000-0x000000000095A000-memory.dmp

          Filesize

          40KB

        • memory/1004-57-0x0000000004630000-0x0000000004696000-memory.dmp

          Filesize

          408KB

        • memory/1004-54-0x0000000000C10000-0x0000000000E3A000-memory.dmp

          Filesize

          2.2MB

        • memory/1156-80-0x0000000000400000-0x0000000000807000-memory.dmp

          Filesize

          4.0MB

        • memory/1156-81-0x0000000000400000-0x0000000000807000-memory.dmp

          Filesize

          4.0MB

        • memory/1156-92-0x0000000000400000-0x0000000000807000-memory.dmp

          Filesize

          4.0MB

        • memory/1156-91-0x0000000000400000-0x0000000000807000-memory.dmp

          Filesize

          4.0MB

        • memory/1156-90-0x0000000000400000-0x0000000000807000-memory.dmp

          Filesize

          4.0MB

        • memory/1156-86-0x0000000000400000-0x0000000000807000-memory.dmp

          Filesize

          4.0MB

        • memory/1156-87-0x0000000000400000-0x0000000000807000-memory.dmp

          Filesize

          4.0MB

        • memory/1156-84-0x0000000000400000-0x0000000000807000-memory.dmp

          Filesize

          4.0MB

        • memory/1156-83-0x0000000000400000-0x0000000000807000-memory.dmp

          Filesize

          4.0MB

        • memory/1920-78-0x0000000000200000-0x000000000020A000-memory.dmp

          Filesize

          40KB

        • memory/1920-75-0x0000000000400000-0x0000000000412000-memory.dmp

          Filesize

          72KB

        • memory/1920-73-0x0000000000400000-0x0000000000412000-memory.dmp

          Filesize

          72KB

        • memory/1920-65-0x0000000000400000-0x0000000000412000-memory.dmp

          Filesize

          72KB

        • memory/1920-70-0x0000000000400000-0x0000000000412000-memory.dmp

          Filesize

          72KB

        • memory/1920-69-0x0000000000400000-0x0000000000412000-memory.dmp

          Filesize

          72KB

        • memory/1920-68-0x0000000000400000-0x0000000000412000-memory.dmp

          Filesize

          72KB

        • memory/1920-66-0x0000000000400000-0x0000000000412000-memory.dmp

          Filesize

          72KB

        • memory/2032-62-0x0000000000AB0000-0x0000000000CDA000-memory.dmp

          Filesize

          2.2MB

        • memory/2032-64-0x00000000022E0000-0x0000000002346000-memory.dmp

          Filesize

          408KB