Analysis

  • max time kernel
    60s
  • max time network
    59s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    30-10-2020 19:35

General

  • Target

    76448bb2fbeda3e0e7c2befbb66ca778.exe

  • Size

    582KB

  • MD5

    76448bb2fbeda3e0e7c2befbb66ca778

  • SHA1

    9a8c6d78d5f67e2e79c198ece6da39f7fd898773

  • SHA256

    40e054c5c315d144c46e4caab2eb10d61f71c8f3cb97a85e81b96ce6a306463d

  • SHA512

    c8e1747f5c8a4979372b1cab52b0c0d09c98bba2cbacf24fac9ca0d6a419e64100169e03cb0c8e865ad72018910e624a69cee3b77f5e30bd8761a1c09fbca41e

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\76448bb2fbeda3e0e7c2befbb66ca778.exe
    "C:\Users\Admin\AppData\Local\Temp\76448bb2fbeda3e0e7c2befbb66ca778.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:288
    • 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:752
      • 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:1552
        • 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:1600
          • C:\Windows\SysWOW64\PING.EXE
            ping 127.0.0.1 -n 3
            5⤵
            • Runs ping.exe
            PID:1452

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/288-1-0x0000000001EB0000-0x0000000001EC1000-memory.dmp

    Filesize

    68KB

  • memory/288-0-0x00000000006AB000-0x00000000006AC000-memory.dmp

    Filesize

    4KB

  • memory/752-8-0x0000000001010000-0x0000000001011000-memory.dmp

    Filesize

    4KB

  • memory/752-7-0x0000000073CE0000-0x00000000743CE000-memory.dmp

    Filesize

    6.9MB

  • memory/752-4-0x0000000000000000-mapping.dmp

  • memory/752-10-0x00000000004C0000-0x00000000004FA000-memory.dmp

    Filesize

    232KB

  • memory/752-11-0x0000000000520000-0x0000000000536000-memory.dmp

    Filesize

    88KB

  • memory/880-2-0x000007FEF6110000-0x000007FEF638A000-memory.dmp

    Filesize

    2.5MB

  • memory/1452-21-0x0000000000000000-mapping.dmp

  • memory/1552-12-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/1552-13-0x000000000042064E-mapping.dmp

  • memory/1552-16-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/1552-15-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/1552-17-0x0000000073D60000-0x000000007444E000-memory.dmp

    Filesize

    6.9MB

  • memory/1600-20-0x0000000000000000-mapping.dmp