Analysis

  • max time kernel
    102s
  • max time network
    101s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    04-11-2020 06:43

General

  • Target

    5a240ce26f7d1fe78e27aeaa03d9fc5c.exe

  • Size

    582KB

  • MD5

    5a240ce26f7d1fe78e27aeaa03d9fc5c

  • SHA1

    e10aee112742f06ba80f407f42d225faf5f7e638

  • SHA256

    82987b4e0e8c616f7100a6421800b283354a22882b83abe0375acb24a924aaa8

  • SHA512

    97a8c7f9480fa41cbeb550f89222554050ac1844da33d011e3e6cbbf9daadf7a9a35cc54f8f186df5114ac0d0aa1c2c680fbc1e4b475a393eb70ea0e75cdbbd8

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\5a240ce26f7d1fe78e27aeaa03d9fc5c.exe
    "C:\Users\Admin\AppData\Local\Temp\5a240ce26f7d1fe78e27aeaa03d9fc5c.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:536
    • 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:864
      • C:\Windows\SysWOW64\cmd.exe
        "cmd.exe" /C ping 127.0.0.1 -n 3 > nul & del ""
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1624
        • C:\Windows\SysWOW64\PING.EXE
          ping 127.0.0.1 -n 3
          4⤵
          • Runs ping.exe
          PID:1112

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/536-1-0x0000000003ED0000-0x0000000003EE1000-memory.dmp

    Filesize

    68KB

  • memory/536-0-0x00000000024FD000-0x00000000024FE000-memory.dmp

    Filesize

    4KB

  • memory/864-6-0x00000000024ED000-0x00000000024EE000-memory.dmp

    Filesize

    4KB

  • memory/864-4-0x0000000000000000-mapping.dmp

  • memory/864-7-0x0000000003CF0000-0x0000000003D01000-memory.dmp

    Filesize

    68KB

  • memory/864-8-0x0000000003EE0000-0x0000000003EF1000-memory.dmp

    Filesize

    68KB

  • memory/864-9-0x0000000073BB0000-0x000000007429E000-memory.dmp

    Filesize

    6.9MB

  • memory/864-10-0x0000000004050000-0x0000000004074000-memory.dmp

    Filesize

    144KB

  • memory/864-11-0x00000000065A0000-0x00000000065C2000-memory.dmp

    Filesize

    136KB

  • memory/1112-14-0x0000000000000000-mapping.dmp

  • memory/1296-2-0x000007FEF81B0000-0x000007FEF842A000-memory.dmp

    Filesize

    2.5MB

  • memory/1624-12-0x0000000000000000-mapping.dmp