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Resubmissions

15/04/2024, 11:31

240415-nmzycsff4y 10

10/04/2024, 04:57

240410-fljwradc86 10

10/04/2024, 04:57

240410-flcsfadc82 10

10/04/2024, 04:57

240410-flb6xadc78 10

10/04/2024, 04:57

240410-flbkdadc77 10

19/12/2023, 13:06

231219-qcfg3sadbq 10

Analysis

  • max time kernel
    293s
  • max time network
    300s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    10/04/2024, 04:57

General

  • Target

    2d3ba7dd14b9a579b2626fa5baee19bd.exe

  • Size

    209KB

  • MD5

    2d3ba7dd14b9a579b2626fa5baee19bd

  • SHA1

    dd365103583cfb3c10b73efc6592f8b80c1d75e0

  • SHA256

    42a191ee4f9593db8f514cce85ad8b9d6533bc71983a9529e7a5d68764d21679

  • SHA512

    29efd1035df73572efea0d96017772481b9858855c12d1bb96fc6a4ccd49443a4bb0d1bd86c69dda4218f04e8855ec37c4515157b75a240a530792232c4f03c0

  • SSDEEP

    6144:YDnLgI91y1UkT57iJz/DpURWPSvHuUiYphu1UY:cnLh9yn52rpUR5vHuRYpM+Y

Score
10/10

Malware Config

Extracted

Family

systembc

C2

yan0212.com:4039

yan0212.net:4039

Signatures

  • SystemBC

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

  • Executes dropped EXE 1 IoCs
  • UPX packed file 1 IoCs

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

  • Looks up external IP address via web service 3 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
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2d3ba7dd14b9a579b2626fa5baee19bd.exe
    "C:\Users\Admin\AppData\Local\Temp\2d3ba7dd14b9a579b2626fa5baee19bd.exe"
    1⤵
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    PID:2300
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {4C9C7F6B-61F6-4EDD-B276-7CFDE5ED867F} S-1-5-18:NT AUTHORITY\System:Service:
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2104
    • C:\ProgramData\eurjc\avehx.exe
      C:\ProgramData\eurjc\avehx.exe start
      2⤵
      • Executes dropped EXE
      PID:2460

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\eurjc\avehx.exe

    Filesize

    209KB

    MD5

    2d3ba7dd14b9a579b2626fa5baee19bd

    SHA1

    dd365103583cfb3c10b73efc6592f8b80c1d75e0

    SHA256

    42a191ee4f9593db8f514cce85ad8b9d6533bc71983a9529e7a5d68764d21679

    SHA512

    29efd1035df73572efea0d96017772481b9858855c12d1bb96fc6a4ccd49443a4bb0d1bd86c69dda4218f04e8855ec37c4515157b75a240a530792232c4f03c0

  • memory/2300-1-0x00000000046A0000-0x00000000047A0000-memory.dmp

    Filesize

    1024KB

  • memory/2300-2-0x0000000000020000-0x0000000000029000-memory.dmp

    Filesize

    36KB

  • memory/2300-9-0x0000000000400000-0x00000000045F0000-memory.dmp

    Filesize

    65.9MB

  • memory/2300-13-0x00000000046A0000-0x00000000047A0000-memory.dmp

    Filesize

    1024KB

  • memory/2460-10-0x00000000047B0000-0x00000000048B0000-memory.dmp

    Filesize

    1024KB

  • memory/2460-12-0x0000000000400000-0x00000000045F0000-memory.dmp

    Filesize

    65.9MB

  • memory/2460-16-0x00000000047B0000-0x00000000048B0000-memory.dmp

    Filesize

    1024KB