Analysis

  • max time kernel
    29s
  • max time network
    29s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    01-11-2020 07:10

General

  • Target

    c5f9ffd8890ca4722cd2f6ebdc39566f.exe

  • Size

    778KB

  • MD5

    c5f9ffd8890ca4722cd2f6ebdc39566f

  • SHA1

    ddeaf76ff2426dc3a7202dc3e84ed4bcbfa97893

  • SHA256

    1ba87aa4f285a9e9cf905da0bc041df4eed434e6bff38aa189387dae4ba90dc5

  • SHA512

    9c0c3811139a8d35ef2debaea44bad4ab34055394d578ac7fc2646b0c2eaa786a3ddf0fa283a134f551ea254ec1ebdecd22940434e783ba10666299cce069694

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\c5f9ffd8890ca4722cd2f6ebdc39566f.exe
    "C:\Users\Admin\AppData\Local\Temp\c5f9ffd8890ca4722cd2f6ebdc39566f.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:2036
    • 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:2012
      • C:\Windows\SysWOW64\cmd.exe
        "cmd.exe" /C ping 127.0.0.1 -n 3 > nul & del ""
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1696
        • C:\Windows\SysWOW64\PING.EXE
          ping 127.0.0.1 -n 3
          4⤵
          • Runs ping.exe
          PID:1080

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

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/1080-18-0x0000000000000000-mapping.dmp

  • memory/1696-16-0x0000000000000000-mapping.dmp

  • memory/1936-2-0x000007FEF6B90000-0x000007FEF6E0A000-memory.dmp

    Filesize

    2.5MB

  • memory/2012-8-0x00000000024E9000-0x00000000024EA000-memory.dmp

    Filesize

    4KB

  • memory/2012-9-0x0000000003B50000-0x0000000003B61000-memory.dmp

    Filesize

    68KB

  • memory/2012-10-0x0000000003DF0000-0x0000000003E01000-memory.dmp

    Filesize

    68KB

  • memory/2012-11-0x0000000074640000-0x0000000074D2E000-memory.dmp

    Filesize

    6.9MB

  • memory/2012-12-0x0000000003F10000-0x0000000003F34000-memory.dmp

    Filesize

    144KB

  • memory/2012-13-0x0000000006630000-0x0000000006652000-memory.dmp

    Filesize

    136KB

  • memory/2012-4-0x0000000000000000-mapping.dmp

  • memory/2036-0-0x00000000024B7000-0x00000000024B8000-memory.dmp

    Filesize

    4KB

  • memory/2036-1-0x0000000003CB0000-0x0000000003CC1000-memory.dmp

    Filesize

    68KB