Analysis

  • max time kernel
    31s
  • max time network
    121s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    13-12-2020 07:35

General

  • Target

    c241a906e50c78a868140398932c5f47.exe

  • Size

    528KB

  • MD5

    c241a906e50c78a868140398932c5f47

  • SHA1

    16eae974827f9a84de6c82b99232cee06ced4b99

  • SHA256

    e1676964811c0a12d9a4ef474d150ea11c4141e608cce5aaedef7c019b6f555f

  • SHA512

    bb734fe4c4170d7815dfc209ed07a1aec618d065cd6d815e2a50a417a9ad5835e023f4e12954e932521c25ac4adfa61e7a408f7ebced89f10b5bb6504c2ae1bc

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
  • UPX packed file 2 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • 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.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c241a906e50c78a868140398932c5f47.exe
    "C:\Users\Admin\AppData\Local\Temp\c241a906e50c78a868140398932c5f47.exe"
    1⤵
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:508
    • C:\Users\Admin\AppData\Roaming\gferrfghvbc\bestof.exe
      bestof.exe
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3432

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\gferrfghvbc\bestof.exe

    MD5

    6ff0a848f7054de66fb740182bde821a

    SHA1

    f3f06eb53ef1feaa8975efc3ea5f2c4136574a4b

    SHA256

    4270b29d2c1ac8eebb7f0c4eedce17264e7df2ffa353867666408a79fd5dfbc7

    SHA512

    4c557d2f551be0940dbc4b18e6bbaf63016cb4dda9529e90d6a66b52f484a05a770743cb7f3eeac1d2b2162afe05ecd1913d151bab2ced407d77ceab0ffd2fff

  • C:\Users\Admin\AppData\Roaming\gferrfghvbc\bestof.exe

    MD5

    6ff0a848f7054de66fb740182bde821a

    SHA1

    f3f06eb53ef1feaa8975efc3ea5f2c4136574a4b

    SHA256

    4270b29d2c1ac8eebb7f0c4eedce17264e7df2ffa353867666408a79fd5dfbc7

    SHA512

    4c557d2f551be0940dbc4b18e6bbaf63016cb4dda9529e90d6a66b52f484a05a770743cb7f3eeac1d2b2162afe05ecd1913d151bab2ced407d77ceab0ffd2fff

  • memory/508-3-0x00000000009F0000-0x00000000009F1000-memory.dmp

    Filesize

    4KB

  • memory/508-2-0x00000000008F4000-0x00000000008F5000-memory.dmp

    Filesize

    4KB

  • memory/3432-12-0x0000000006850000-0x0000000006873000-memory.dmp

    Filesize

    140KB

  • memory/3432-15-0x0000000008FB0000-0x0000000008FB1000-memory.dmp

    Filesize

    4KB

  • memory/3432-8-0x00000000068E0000-0x00000000068E1000-memory.dmp

    Filesize

    4KB

  • memory/3432-9-0x0000000072630000-0x0000000072D1E000-memory.dmp

    Filesize

    6.9MB

  • memory/3432-10-0x0000000006640000-0x0000000006664000-memory.dmp

    Filesize

    144KB

  • memory/3432-11-0x0000000009070000-0x0000000009071000-memory.dmp

    Filesize

    4KB

  • memory/3432-4-0x0000000000000000-mapping.dmp

  • memory/3432-13-0x0000000009570000-0x0000000009571000-memory.dmp

    Filesize

    4KB

  • memory/3432-14-0x0000000008F70000-0x0000000008F71000-memory.dmp

    Filesize

    4KB

  • memory/3432-7-0x0000000006640000-0x0000000006641000-memory.dmp

    Filesize

    4KB

  • memory/3432-16-0x0000000009000000-0x0000000009001000-memory.dmp

    Filesize

    4KB

  • memory/3432-17-0x0000000009CA0000-0x0000000009CA1000-memory.dmp

    Filesize

    4KB

  • memory/3432-18-0x000000000A990000-0x000000000A991000-memory.dmp

    Filesize

    4KB

  • memory/3432-19-0x000000000AB60000-0x000000000AB61000-memory.dmp

    Filesize

    4KB

  • memory/3432-20-0x000000000B180000-0x000000000B181000-memory.dmp

    Filesize

    4KB

  • memory/3432-21-0x000000000B240000-0x000000000B241000-memory.dmp

    Filesize

    4KB

  • memory/3432-22-0x000000000B2D0000-0x000000000B2D1000-memory.dmp

    Filesize

    4KB

  • memory/3432-23-0x000000000B640000-0x000000000B641000-memory.dmp

    Filesize

    4KB

  • memory/3432-24-0x000000000B760000-0x000000000B761000-memory.dmp

    Filesize

    4KB