Analysis

  • max time kernel
    28s
  • max time network
    27s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    01-11-2020 07:31

General

  • Target

    fa4988669374b7f32ab387fe8029625e.exe

  • Size

    778KB

  • MD5

    fa4988669374b7f32ab387fe8029625e

  • SHA1

    982be59b08cbaae6aeddbc32ae55989ac551a917

  • SHA256

    951d7b367ca9c6742c6c48a017519323a9ee9b7c3ec0fed414aabcd5fc09c26f

  • SHA512

    68c329f9c888a9034a6f4be638b7d1bff5fda2167898f3d7526089c589b68a1e535c91e57a24af6fe0cc2911243ec188a2e370e54e45b85ecb3a0fed413bea1e

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\fa4988669374b7f32ab387fe8029625e.exe
    "C:\Users\Admin\AppData\Local\Temp\fa4988669374b7f32ab387fe8029625e.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:1924
    • 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:1060
      • C:\Windows\SysWOW64\cmd.exe
        "cmd.exe" /C ping 127.0.0.1 -n 3 > nul & del ""
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:904
        • C:\Windows\SysWOW64\PING.EXE
          ping 127.0.0.1 -n 3
          4⤵
          • Runs ping.exe
          PID:1644

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/532-2-0x000007FEF76B0000-0x000007FEF792A000-memory.dmp

    Filesize

    2.5MB

  • memory/904-13-0x0000000000000000-mapping.dmp

  • memory/1060-6-0x0000000000309000-0x000000000030A000-memory.dmp

    Filesize

    4KB

  • memory/1060-4-0x0000000000000000-mapping.dmp

  • memory/1060-7-0x0000000003AF0000-0x0000000003B01000-memory.dmp

    Filesize

    68KB

  • memory/1060-8-0x0000000003D90000-0x0000000003DA1000-memory.dmp

    Filesize

    68KB

  • memory/1060-9-0x0000000073D10000-0x00000000743FE000-memory.dmp

    Filesize

    6.9MB

  • memory/1060-10-0x0000000003B90000-0x0000000003BB4000-memory.dmp

    Filesize

    144KB

  • memory/1060-12-0x0000000003EE0000-0x0000000003F02000-memory.dmp

    Filesize

    136KB

  • memory/1644-14-0x0000000000000000-mapping.dmp

  • memory/1924-0-0x0000000002807000-0x0000000002808000-memory.dmp

    Filesize

    4KB

  • memory/1924-1-0x0000000003CE0000-0x0000000003CF1000-memory.dmp

    Filesize

    68KB