Analysis

  • max time kernel
    32s
  • max time network
    31s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    01-11-2020 07:21

General

  • Target

    b89909ca38cc8db3dfed14f8fbf992d3.exe

  • Size

    789KB

  • MD5

    b89909ca38cc8db3dfed14f8fbf992d3

  • SHA1

    7f41456dd12f38cc6b18dc73d130a86df82f2614

  • SHA256

    1902d4a7a8bc2008c71d9806065bc9b8ec069169fc6eb61a64799dab46aaef3c

  • SHA512

    81da8d01f3bad0c763de1bd4fcdf70bd540ff7f321013451a1b1025ffcfba5e1e1e1f57a77e9456bf41c1d1d9f7d6558f3edaac82e7650d7428d6180c895312f

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\b89909ca38cc8db3dfed14f8fbf992d3.exe
    "C:\Users\Admin\AppData\Local\Temp\b89909ca38cc8db3dfed14f8fbf992d3.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:1056
    • 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:1664
      • C:\Windows\SysWOW64\cmd.exe
        "cmd.exe" /C ping 127.0.0.1 -n 3 > nul & del ""
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1956
        • C:\Windows\SysWOW64\PING.EXE
          ping 127.0.0.1 -n 3
          4⤵
          • Runs ping.exe
          PID:472

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/472-18-0x0000000000000000-mapping.dmp

  • memory/1056-0-0x0000000002487000-0x0000000002488000-memory.dmp

    Filesize

    4KB

  • memory/1056-1-0x0000000003E00000-0x0000000003E11000-memory.dmp

    Filesize

    68KB

  • memory/1440-2-0x000007FEF7DF0000-0x000007FEF806A000-memory.dmp

    Filesize

    2.5MB

  • memory/1664-6-0x00000000027A9000-0x00000000027AA000-memory.dmp

    Filesize

    4KB

  • memory/1664-7-0x0000000003C80000-0x0000000003C91000-memory.dmp

    Filesize

    68KB

  • memory/1664-8-0x0000000003E50000-0x0000000003E61000-memory.dmp

    Filesize

    68KB

  • memory/1664-9-0x0000000073D10000-0x00000000743FE000-memory.dmp

    Filesize

    6.9MB

  • memory/1664-10-0x0000000002720000-0x0000000002744000-memory.dmp

    Filesize

    144KB

  • memory/1664-16-0x0000000002750000-0x0000000002772000-memory.dmp

    Filesize

    136KB

  • memory/1664-4-0x0000000000000000-mapping.dmp

  • memory/1956-17-0x0000000000000000-mapping.dmp