Analysis

  • max time kernel
    87s
  • max time network
    86s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    01-11-2020 06:50

General

  • Target

    f59ce75e906cc93d49e938df886d1c68.exe

  • Size

    796KB

  • MD5

    f59ce75e906cc93d49e938df886d1c68

  • SHA1

    694063b4a344d2ea2deecc59b7deaa69e9037461

  • SHA256

    3199411c6b716321009ffc3c3ccd88b406d2f90b9504bf147647c8e3c7773578

  • SHA512

    038742fa6896fba93f6773aef2264d441159eac054e5602005037ee7df2f8d2906d0081998c4ae7a03ae2c4194bb7d23c185e5809635659e09490d8623d90df5

Malware Config

Signatures

  • RedLine

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

  • RedLine Payload 2 IoCs
  • Executes dropped EXE 1 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.

  • 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 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f59ce75e906cc93d49e938df886d1c68.exe
    "C:\Users\Admin\AppData\Local\Temp\f59ce75e906cc93d49e938df886d1c68.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:2028
    • C:\Users\Admin\AppData\Roaming\gfersesurity\bestof.exe
      bestof.exe
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2008
      • C:\Windows\SysWOW64\cmd.exe
        "cmd.exe" /C ping 127.0.0.1 -n 3 > nul & del ""
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1716
        • C:\Windows\SysWOW64\PING.EXE
          ping 127.0.0.1 -n 3
          4⤵
          • Runs ping.exe
          PID:1928

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

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

    MD5

    6943b3380427465a7998ddf3a96945a0

    SHA1

    abb680ef5e005da1610828d518c15a250b001fd9

    SHA256

    94e489927f1f04b50d80382b4ebbb245d8b0cd55f36dac8d7de3c543cbf361fb

    SHA512

    5c8fb35986df56b3f6f7b850a98455ab3d767372b57838d54c9faf280826975a0f2a0828fa977469a3d5e02ce9f7bea23e8b574cf793f4264f385e871de8277d

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

    MD5

    6943b3380427465a7998ddf3a96945a0

    SHA1

    abb680ef5e005da1610828d518c15a250b001fd9

    SHA256

    94e489927f1f04b50d80382b4ebbb245d8b0cd55f36dac8d7de3c543cbf361fb

    SHA512

    5c8fb35986df56b3f6f7b850a98455ab3d767372b57838d54c9faf280826975a0f2a0828fa977469a3d5e02ce9f7bea23e8b574cf793f4264f385e871de8277d

  • memory/1084-2-0x000007FEF6510000-0x000007FEF678A000-memory.dmp

    Filesize

    2.5MB

  • memory/1716-18-0x0000000000000000-mapping.dmp

  • memory/1928-19-0x0000000000000000-mapping.dmp

  • memory/2008-11-0x0000000002449000-0x000000000244A000-memory.dmp

    Filesize

    4KB

  • memory/2008-12-0x0000000003DD0000-0x0000000003DE1000-memory.dmp

    Filesize

    68KB

  • memory/2008-13-0x0000000003DD0000-0x0000000003DE1000-memory.dmp

    Filesize

    68KB

  • memory/2008-14-0x0000000073FA0000-0x000000007468E000-memory.dmp

    Filesize

    6.9MB

  • memory/2008-15-0x0000000004020000-0x0000000004044000-memory.dmp

    Filesize

    144KB

  • memory/2008-16-0x0000000004050000-0x0000000004072000-memory.dmp

    Filesize

    136KB

  • memory/2008-8-0x0000000000000000-mapping.dmp

  • memory/2028-0-0x0000000002527000-0x0000000002528000-memory.dmp

    Filesize

    4KB

  • memory/2028-1-0x0000000003D20000-0x0000000003D31000-memory.dmp

    Filesize

    68KB