Analysis

  • max time kernel
    135s
  • max time network
    136s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    30-10-2020 19:35

General

  • Target

    75be014e5cba03bc01cad324c0858808.exe

  • Size

    777KB

  • MD5

    75be014e5cba03bc01cad324c0858808

  • SHA1

    ea7975231e51ed81b1f3f101580829b2cce39fc3

  • SHA256

    87cd820fbd3707a5c0163a68fc72eeee76d16867aefc372c19b03bf1edc0bbd7

  • SHA512

    fef33c0723c826d899480d0a880cce771a18d0582bca1a01144f7671bb47ddf45752c7e450fdb417f91919ec1c5c4b6a6b6f21546b0f0aa6590d993adaee8eea

Malware Config

Signatures

  • RedLine

    RedLine Stealer is a malware family written in C#, first appearing in early 2020.

  • RedLine Payload 4 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Looks up external IP address via web service 2 IoCs

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

  • 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 system certificate store 2 TTPs 2 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\75be014e5cba03bc01cad324c0858808.exe
    "C:\Users\Admin\AppData\Local\Temp\75be014e5cba03bc01cad324c0858808.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:1056
    • C:\Users\Admin\AppData\Roaming\gfersesurity\bestof.exe
      bestof.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:268
      • C:\Users\Admin\AppData\Roaming\gfersesurity\bestof.exe
        "C:\Users\Admin\AppData\Roaming\gfersesurity\bestof.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1808
        • C:\Windows\SysWOW64\cmd.exe
          "cmd.exe" /C ping 127.0.0.1 -n 3 > nul & del "C:\Users\Admin\AppData\Roaming\gfersesurity\bestof.exe"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:536
          • C:\Windows\SysWOW64\PING.EXE
            ping 127.0.0.1 -n 3
            5⤵
            • Runs ping.exe
            PID:760

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\gfersesurity\bestof.exe

    MD5

    ae71797ed71a11f172c9d03701ae88c7

    SHA1

    10a0cc04fbed99c4f0f1f908979455da6868f1eb

    SHA256

    0215f9dd19951e07aaa5ddfed10c4b46af716a8e3ce1ccb853f0992d14ee3e34

    SHA512

    7f6fa1d06268a9b1a3541f19f1a2636be3579d6bcb8eb6f54f53bfdd380f1a7150e32a61799aefec5b52b920e8b39213d5dacf8e24654559b1022f6fd51a5d77

  • C:\Users\Admin\AppData\Roaming\gfersesurity\bestof.exe

    MD5

    ae71797ed71a11f172c9d03701ae88c7

    SHA1

    10a0cc04fbed99c4f0f1f908979455da6868f1eb

    SHA256

    0215f9dd19951e07aaa5ddfed10c4b46af716a8e3ce1ccb853f0992d14ee3e34

    SHA512

    7f6fa1d06268a9b1a3541f19f1a2636be3579d6bcb8eb6f54f53bfdd380f1a7150e32a61799aefec5b52b920e8b39213d5dacf8e24654559b1022f6fd51a5d77

  • C:\Users\Admin\AppData\Roaming\gfersesurity\bestof.exe

    MD5

    ae71797ed71a11f172c9d03701ae88c7

    SHA1

    10a0cc04fbed99c4f0f1f908979455da6868f1eb

    SHA256

    0215f9dd19951e07aaa5ddfed10c4b46af716a8e3ce1ccb853f0992d14ee3e34

    SHA512

    7f6fa1d06268a9b1a3541f19f1a2636be3579d6bcb8eb6f54f53bfdd380f1a7150e32a61799aefec5b52b920e8b39213d5dacf8e24654559b1022f6fd51a5d77

  • \Users\Admin\AppData\Roaming\gfersesurity\bestof.exe

    MD5

    ae71797ed71a11f172c9d03701ae88c7

    SHA1

    10a0cc04fbed99c4f0f1f908979455da6868f1eb

    SHA256

    0215f9dd19951e07aaa5ddfed10c4b46af716a8e3ce1ccb853f0992d14ee3e34

    SHA512

    7f6fa1d06268a9b1a3541f19f1a2636be3579d6bcb8eb6f54f53bfdd380f1a7150e32a61799aefec5b52b920e8b39213d5dacf8e24654559b1022f6fd51a5d77

  • memory/268-12-0x0000000000EA0000-0x0000000000EA1000-memory.dmp

    Filesize

    4KB

  • memory/268-11-0x00000000745C0000-0x0000000074CAE000-memory.dmp

    Filesize

    6.9MB

  • memory/268-16-0x0000000000490000-0x00000000004CA000-memory.dmp

    Filesize

    232KB

  • memory/268-17-0x0000000000200000-0x0000000000216000-memory.dmp

    Filesize

    88KB

  • memory/268-8-0x0000000000000000-mapping.dmp

  • memory/536-26-0x0000000000000000-mapping.dmp

  • memory/760-27-0x0000000000000000-mapping.dmp

  • memory/1056-0-0x0000000002539000-0x000000000253A000-memory.dmp

    Filesize

    4KB

  • memory/1056-1-0x0000000003DA0000-0x0000000003DB1000-memory.dmp

    Filesize

    68KB

  • memory/1560-2-0x000007FEF6930000-0x000007FEF6BAA000-memory.dmp

    Filesize

    2.5MB

  • memory/1808-18-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/1808-22-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/1808-23-0x0000000074640000-0x0000000074D2E000-memory.dmp

    Filesize

    6.9MB

  • memory/1808-21-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/1808-19-0x000000000042064E-mapping.dmp