Analysis

  • max time kernel
    149s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    27-04-2022 17:55

General

  • Target

    e1d879e9b873962cde3f42e555a2583eca3c135d1f63aebfbbf3dd95f77a30cf.exe

  • Size

    89KB

  • MD5

    223f824fbc8cacd41d0e119034c1d043

  • SHA1

    3b8e9eff67bc8f37431b26dbcde55e0c1767519d

  • SHA256

    e1d879e9b873962cde3f42e555a2583eca3c135d1f63aebfbbf3dd95f77a30cf

  • SHA512

    849c3d8345b4fcb22afc6786052e06cfa9cb5ac853a318e91be934dbeda7a15ebc068d2d6e2f8b2ad0d7fd88e30660f71703557512175808656c64e337d688e1

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.

  • suricata: ET MALWARE Observed SystemBC CnC Domain in DNS Query

    suricata: ET MALWARE Observed SystemBC CnC Domain in DNS Query

  • 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\e1d879e9b873962cde3f42e555a2583eca3c135d1f63aebfbbf3dd95f77a30cf.exe
    "C:\Users\Admin\AppData\Local\Temp\e1d879e9b873962cde3f42e555a2583eca3c135d1f63aebfbbf3dd95f77a30cf.exe"
    1⤵
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    PID:4304
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4304 -s 964
      2⤵
      • Program crash
      PID:4256
  • C:\ProgramData\pvpaxi\cpfurq.exe
    C:\ProgramData\pvpaxi\cpfurq.exe start
    1⤵
    • Executes dropped EXE
    PID:3804
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4304 -ip 4304
    1⤵
      PID:2060

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Command and Control

    Connection Proxy

    1
    T1090

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\pvpaxi\cpfurq.exe
      Filesize

      89KB

      MD5

      223f824fbc8cacd41d0e119034c1d043

      SHA1

      3b8e9eff67bc8f37431b26dbcde55e0c1767519d

      SHA256

      e1d879e9b873962cde3f42e555a2583eca3c135d1f63aebfbbf3dd95f77a30cf

      SHA512

      849c3d8345b4fcb22afc6786052e06cfa9cb5ac853a318e91be934dbeda7a15ebc068d2d6e2f8b2ad0d7fd88e30660f71703557512175808656c64e337d688e1

    • C:\ProgramData\pvpaxi\cpfurq.exe
      Filesize

      89KB

      MD5

      223f824fbc8cacd41d0e119034c1d043

      SHA1

      3b8e9eff67bc8f37431b26dbcde55e0c1767519d

      SHA256

      e1d879e9b873962cde3f42e555a2583eca3c135d1f63aebfbbf3dd95f77a30cf

      SHA512

      849c3d8345b4fcb22afc6786052e06cfa9cb5ac853a318e91be934dbeda7a15ebc068d2d6e2f8b2ad0d7fd88e30660f71703557512175808656c64e337d688e1

    • memory/3804-135-0x0000000003163000-0x0000000003169000-memory.dmp
      Filesize

      24KB

    • memory/3804-136-0x0000000003020000-0x0000000003029000-memory.dmp
      Filesize

      36KB

    • memory/3804-137-0x0000000000400000-0x0000000002FA2000-memory.dmp
      Filesize

      43.6MB

    • memory/4304-131-0x0000000004CE0000-0x0000000004CE9000-memory.dmp
      Filesize

      36KB

    • memory/4304-130-0x0000000003048000-0x000000000304F000-memory.dmp
      Filesize

      28KB

    • memory/4304-132-0x0000000000400000-0x0000000002FA2000-memory.dmp
      Filesize

      43.6MB