Analysis

  • max time kernel
    136s
  • max time network
    138s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    04-11-2020 06:41

General

  • Target

    9c2827e7f7a4c9a7c47e88f052c070b1.exe

  • Size

    582KB

  • MD5

    9c2827e7f7a4c9a7c47e88f052c070b1

  • SHA1

    eb6d77adf05e13c95cce107d4e6e59df0a42f673

  • SHA256

    d7857e0b29661872c17e025785d8ec9074f580f9837ba148699756fecf2b1779

  • SHA512

    57f739684bae926ef6d0a90dc1db828a9917e12aa5b235d7a4f0780d62b86a631f4aa4eaeae0fa7e610eed0051aca806969987e7457e071a100b9e79fdc2e607

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\9c2827e7f7a4c9a7c47e88f052c070b1.exe
    "C:\Users\Admin\AppData\Local\Temp\9c2827e7f7a4c9a7c47e88f052c070b1.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:1880
    • 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:760
      • C:\Windows\SysWOW64\cmd.exe
        "cmd.exe" /C ping 127.0.0.1 -n 3 > nul & del ""
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1620
        • C:\Windows\SysWOW64\PING.EXE
          ping 127.0.0.1 -n 3
          4⤵
          • Runs ping.exe
          PID:1580

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

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

    MD5

    651026d3f1f58ca2718cac5272a53192

    SHA1

    f975cb02d4f348ae6cd3fd112b746445bd653e87

    SHA256

    fdc884b306b56d605844a30990a565fed93cbbf6d15c04c524ee606fbb1d8931

    SHA512

    9fe5bf0e4df06c0c67db69d6002366ee9897bdeb9c89940657f64852e9c287f1a2fc7ec2fac4377e77f97781045a4cc080318d2ec9e628da6ed9829a0ef929c3

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

    MD5

    651026d3f1f58ca2718cac5272a53192

    SHA1

    f975cb02d4f348ae6cd3fd112b746445bd653e87

    SHA256

    fdc884b306b56d605844a30990a565fed93cbbf6d15c04c524ee606fbb1d8931

    SHA512

    9fe5bf0e4df06c0c67db69d6002366ee9897bdeb9c89940657f64852e9c287f1a2fc7ec2fac4377e77f97781045a4cc080318d2ec9e628da6ed9829a0ef929c3

  • memory/760-6-0x000000000239D000-0x000000000239E000-memory.dmp

    Filesize

    4KB

  • memory/760-4-0x0000000000000000-mapping.dmp

  • memory/760-7-0x0000000003D70000-0x0000000003D81000-memory.dmp

    Filesize

    68KB

  • memory/760-8-0x0000000003F50000-0x0000000003F61000-memory.dmp

    Filesize

    68KB

  • memory/760-9-0x0000000073B30000-0x000000007421E000-memory.dmp

    Filesize

    6.9MB

  • memory/760-10-0x0000000002350000-0x0000000002374000-memory.dmp

    Filesize

    144KB

  • memory/760-11-0x0000000003CE0000-0x0000000003D02000-memory.dmp

    Filesize

    136KB

  • memory/780-2-0x000007FEF7810000-0x000007FEF7A8A000-memory.dmp

    Filesize

    2.5MB

  • memory/1580-13-0x0000000000000000-mapping.dmp

  • memory/1620-12-0x0000000000000000-mapping.dmp

  • memory/1880-1-0x0000000003CE0000-0x0000000003CF1000-memory.dmp

    Filesize

    68KB

  • memory/1880-0-0x00000000024DD000-0x00000000024DE000-memory.dmp

    Filesize

    4KB