Analysis

  • max time kernel
    163s
  • max time network
    169s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    26-03-2022 00:38

General

  • Target

    b87961b51b3b2958a9b2a0dd6e0f56edb0efb52fdcc68aa553097c2ea5f52e4e.exe

  • Size

    285KB

  • MD5

    44104370647086089833d115c55f6d7f

  • SHA1

    502c3678a36c7433bc402f787cc0f0c7cc7eec29

  • SHA256

    b87961b51b3b2958a9b2a0dd6e0f56edb0efb52fdcc68aa553097c2ea5f52e4e

  • SHA512

    a91ca5aa9dfa02f35ef2344b3485e28ab55f41fc4d0f38a9d176b959e10cbfdba8a79b304d67ec3e1478ed9270e3e79855bd352a932e3845e8141ac471b2b29e

Score
10/10

Malware Config

Extracted

Family

systembc

C2

advertrex20.xyz:4044

gentexman37.xyz:4044

Signatures

  • SystemBC

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

  • Executes dropped EXE 1 IoCs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Uses Tor communications 1 TTPs

    Malware can proxy its traffic through Tor for more anonymity.

  • Drops file in Windows directory 2 IoCs
  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b87961b51b3b2958a9b2a0dd6e0f56edb0efb52fdcc68aa553097c2ea5f52e4e.exe
    "C:\Users\Admin\AppData\Local\Temp\b87961b51b3b2958a9b2a0dd6e0f56edb0efb52fdcc68aa553097c2ea5f52e4e.exe"
    1⤵
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    PID:3764
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3764 -s 484
      2⤵
      • Program crash
      PID:1792
  • C:\ProgramData\cauvd\limaxgj.exe
    C:\ProgramData\cauvd\limaxgj.exe start
    1⤵
    • Executes dropped EXE
    PID:3836
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 3764 -ip 3764
    1⤵
      PID:2516

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\cauvd\limaxgj.exe

      MD5

      44104370647086089833d115c55f6d7f

      SHA1

      502c3678a36c7433bc402f787cc0f0c7cc7eec29

      SHA256

      b87961b51b3b2958a9b2a0dd6e0f56edb0efb52fdcc68aa553097c2ea5f52e4e

      SHA512

      a91ca5aa9dfa02f35ef2344b3485e28ab55f41fc4d0f38a9d176b959e10cbfdba8a79b304d67ec3e1478ed9270e3e79855bd352a932e3845e8141ac471b2b29e

    • C:\ProgramData\cauvd\limaxgj.exe

      MD5

      44104370647086089833d115c55f6d7f

      SHA1

      502c3678a36c7433bc402f787cc0f0c7cc7eec29

      SHA256

      b87961b51b3b2958a9b2a0dd6e0f56edb0efb52fdcc68aa553097c2ea5f52e4e

      SHA512

      a91ca5aa9dfa02f35ef2344b3485e28ab55f41fc4d0f38a9d176b959e10cbfdba8a79b304d67ec3e1478ed9270e3e79855bd352a932e3845e8141ac471b2b29e

    • memory/3764-130-0x0000000004790000-0x0000000004796000-memory.dmp

      Filesize

      24KB

    • memory/3764-131-0x00000000047A0000-0x00000000047A9000-memory.dmp

      Filesize

      36KB

    • memory/3764-132-0x0000000000400000-0x00000000046C7000-memory.dmp

      Filesize

      66.8MB

    • memory/3836-135-0x0000000004830000-0x0000000004839000-memory.dmp

      Filesize

      36KB

    • memory/3836-136-0x0000000000400000-0x00000000046C7000-memory.dmp

      Filesize

      66.8MB