Analysis

  • max time kernel
    146s
  • max time network
    156s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    08/11/2022, 06:55

General

  • Target

    597b728407b2c1a91d5a49d0bc9a9c55.exe

  • Size

    32KB

  • MD5

    597b728407b2c1a91d5a49d0bc9a9c55

  • SHA1

    a3589bc875751b10363ba56c559948781429a57a

  • SHA256

    4eceaf21c15e9755c7ea6dae9613bebe2462f4e85322a8e7d521e277e8bb1f13

  • SHA512

    964c7e5e90c96e2fd286cfee1f8d115abbdccf5cc8068a075fba2f964a1594b78dd69daa42ba8ad2fac58a99d6f9b3ee76f2d1d6a9d1ee744a5330cb9d978c43

  • SSDEEP

    768:HqPzUdiJ8dayafVcCSWYVYnPrryFbnpoJo2ECpKc6lUZ1Fg:YLJ8dayaaupDobnpo2Ip0

Score
10/10

Malware Config

Extracted

Family

systembc

C2

45.182.189.231:443

Signatures

  • SystemBC

    SystemBC is a proxy and remote administration tool first seen in 2019.

  • Executes dropped EXE 1 IoCs
  • Drops file in Windows directory 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\597b728407b2c1a91d5a49d0bc9a9c55.exe
    "C:\Users\Admin\AppData\Local\Temp\597b728407b2c1a91d5a49d0bc9a9c55.exe"
    1⤵
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    PID:1928
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {E2DF8F9A-C242-48A2-85E1-1B50737A6552} S-1-5-18:NT AUTHORITY\System:Service:
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1860
    • C:\ProgramData\sxnjs\njfdvsf.exe
      C:\ProgramData\sxnjs\njfdvsf.exe start
      2⤵
      • Executes dropped EXE
      PID:1112

Network

        MITRE ATT&CK Matrix

        Replay Monitor

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        Downloads

        • C:\ProgramData\sxnjs\njfdvsf.exe

          Filesize

          32KB

          MD5

          597b728407b2c1a91d5a49d0bc9a9c55

          SHA1

          a3589bc875751b10363ba56c559948781429a57a

          SHA256

          4eceaf21c15e9755c7ea6dae9613bebe2462f4e85322a8e7d521e277e8bb1f13

          SHA512

          964c7e5e90c96e2fd286cfee1f8d115abbdccf5cc8068a075fba2f964a1594b78dd69daa42ba8ad2fac58a99d6f9b3ee76f2d1d6a9d1ee744a5330cb9d978c43

        • C:\ProgramData\sxnjs\njfdvsf.exe

          Filesize

          32KB

          MD5

          597b728407b2c1a91d5a49d0bc9a9c55

          SHA1

          a3589bc875751b10363ba56c559948781429a57a

          SHA256

          4eceaf21c15e9755c7ea6dae9613bebe2462f4e85322a8e7d521e277e8bb1f13

          SHA512

          964c7e5e90c96e2fd286cfee1f8d115abbdccf5cc8068a075fba2f964a1594b78dd69daa42ba8ad2fac58a99d6f9b3ee76f2d1d6a9d1ee744a5330cb9d978c43

        • memory/1928-54-0x00000000762B1000-0x00000000762B3000-memory.dmp

          Filesize

          8KB