Analysis

  • max time kernel
    29s
  • max time network
    25s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    01-11-2020 06:59

General

  • Target

    de5b69163b3ee3da6e6b852e857bc7c4.exe

  • Size

    773KB

  • MD5

    de5b69163b3ee3da6e6b852e857bc7c4

  • SHA1

    cad75eb4beb9e3f5157df853cb023d8ebacd2b1e

  • SHA256

    07f0f8308cf0da73ba917e592bc6b746fba3078b2ac25a98760f4fc30952d869

  • SHA512

    e2f6d43cd0bd236223023d718bf5a61505c7fa6f0e6199c04dd232c28ef115ec7cc32f73a1279e3ebed6b1a8ade967600f6d315a23bc41e665c5ab5b25fedc47

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\de5b69163b3ee3da6e6b852e857bc7c4.exe
    "C:\Users\Admin\AppData\Local\Temp\de5b69163b3ee3da6e6b852e857bc7c4.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:1644
    • 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:1744
      • C:\Windows\SysWOW64\cmd.exe
        "cmd.exe" /C ping 127.0.0.1 -n 3 > nul & del ""
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:344
        • C:\Windows\SysWOW64\PING.EXE
          ping 127.0.0.1 -n 3
          4⤵
          • Runs ping.exe
          PID:752

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/344-13-0x0000000000000000-mapping.dmp

  • memory/752-14-0x0000000000000000-mapping.dmp

  • memory/1528-2-0x000007FEF7B10000-0x000007FEF7D8A000-memory.dmp

    Filesize

    2.5MB

  • memory/1644-1-0x0000000003E80000-0x0000000003E91000-memory.dmp

    Filesize

    68KB

  • memory/1644-0-0x00000000024B7000-0x00000000024B8000-memory.dmp

    Filesize

    4KB

  • memory/1744-6-0x00000000002A9000-0x00000000002AA000-memory.dmp

    Filesize

    4KB

  • memory/1744-8-0x0000000003D60000-0x0000000003D71000-memory.dmp

    Filesize

    68KB

  • memory/1744-9-0x00000000742F0000-0x00000000749DE000-memory.dmp

    Filesize

    6.9MB

  • memory/1744-10-0x0000000003CF0000-0x0000000003D14000-memory.dmp

    Filesize

    144KB

  • memory/1744-12-0x0000000003D20000-0x0000000003D42000-memory.dmp

    Filesize

    136KB

  • memory/1744-7-0x0000000003D60000-0x0000000003D71000-memory.dmp

    Filesize

    68KB

  • memory/1744-4-0x0000000000000000-mapping.dmp