Analysis

  • max time kernel
    29s
  • max time network
    26s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    04-11-2020 06:37

General

  • Target

    22f75e559af6136493fde864eb0dcaff.exe

  • Size

    582KB

  • MD5

    22f75e559af6136493fde864eb0dcaff

  • SHA1

    893afa552f13649d3d5c2bb221a0226b3ca1b9a5

  • SHA256

    8adbfd848073831a188b34f13917203fc74c7fed85cc3fe64084f1c87b602a57

  • SHA512

    4b4b0ceb9a2b3de18a111ce82371232d190b46b18569911c4c7bdd0654f3a319aea57a7ec60ae53b7fa547d6495c686c2e2c4a21993dc7ff3c099806934cfcee

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\22f75e559af6136493fde864eb0dcaff.exe
    "C:\Users\Admin\AppData\Local\Temp\22f75e559af6136493fde864eb0dcaff.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:1700
    • 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:324
      • 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:548

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/324-10-0x000000000249D000-0x000000000249E000-memory.dmp

    Filesize

    4KB

  • memory/324-8-0x0000000000000000-mapping.dmp

  • memory/324-11-0x0000000003CA0000-0x0000000003CB1000-memory.dmp

    Filesize

    68KB

  • memory/324-12-0x0000000003E40000-0x0000000003E51000-memory.dmp

    Filesize

    68KB

  • memory/324-13-0x0000000074480000-0x0000000074B6E000-memory.dmp

    Filesize

    6.9MB

  • memory/324-14-0x00000000041B0000-0x00000000041D4000-memory.dmp

    Filesize

    144KB

  • memory/324-16-0x00000000041E0000-0x0000000004202000-memory.dmp

    Filesize

    136KB

  • memory/548-18-0x0000000000000000-mapping.dmp

  • memory/1308-2-0x000007FEF6920000-0x000007FEF6B9A000-memory.dmp

    Filesize

    2.5MB

  • memory/1620-17-0x0000000000000000-mapping.dmp

  • memory/1700-1-0x0000000003DD0000-0x0000000003DE1000-memory.dmp

    Filesize

    68KB

  • memory/1700-0-0x00000000027AD000-0x00000000027AE000-memory.dmp

    Filesize

    4KB