Analysis

  • max time kernel
    142s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230824-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230824-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/08/2023, 11:40

General

  • Target

    8f37126c2aeb160eae109ee9371af841_mafia_JC.exe

  • Size

    3.8MB

  • MD5

    8f37126c2aeb160eae109ee9371af841

  • SHA1

    27b0b73093a8be6dd4e14dfecf24b17bb0030979

  • SHA256

    13695895cc67645c4266ee080b8980e1ba142090e303827e9798b7c269ded5f6

  • SHA512

    37776858bd14dfcb7c8e3a97cd6c0a3a1846bb1a0c17772e6f94ab7880f20f0107a84a6fd12fd6d48260ff04e003349205a13f5e2bb17daa43500a1c983e2515

  • SSDEEP

    98304:a8xMpv3AZEJFyoqRZgKeSNRmp9nVnKlrfGcv2IJaLf7sakL7xBG:7mpvAekozS2nVKlrf3v29LY9vH

Malware Config

Signatures

  • Glupteba

    Glupteba is a modular loader written in Golang with various components.

  • Glupteba payload 19 IoCs
  • Modifies Windows Firewall 1 TTPs 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops file in System32 directory 8 IoCs
  • Checks for VirtualBox DLLs, possible anti-VM trick 1 TTPs 1 IoCs

    Certain files are specific to VirtualBox VMs and can be used to detect execution in a VM.

  • Drops file in Windows directory 2 IoCs
  • GoLang User-Agent 3 IoCs

    Uses default user-agent string defined by GoLang HTTP packages.

  • Modifies data under HKEY_USERS 64 IoCs
  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 18 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8f37126c2aeb160eae109ee9371af841_mafia_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\8f37126c2aeb160eae109ee9371af841_mafia_JC.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:3020
    • C:\Users\Admin\AppData\Local\Temp\8f37126c2aeb160eae109ee9371af841_mafia_JC.exe
      "C:\Users\Admin\AppData\Local\Temp\8f37126c2aeb160eae109ee9371af841_mafia_JC.exe"
      2⤵
      • Adds Run key to start application
      • Checks for VirtualBox DLLs, possible anti-VM trick
      • Drops file in Windows directory
      • Modifies data under HKEY_USERS
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:544
      • C:\Windows\system32\cmd.exe
        C:\Windows\Sysnative\cmd.exe /C "netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4116
        • C:\Windows\system32\netsh.exe
          netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes
          4⤵
          • Modifies Windows Firewall
          PID:1784
      • C:\Windows\system32\cmd.exe
        C:\Windows\Sysnative\cmd.exe /C "netsh advfirewall firewall add rule name="CloudNet" dir=in action=allow program="C:\Users\Admin\AppData\Roaming\EpicNet Inc\CloudNet\cloudnet.exe" enable=yes"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4956
        • C:\Windows\system32\netsh.exe
          netsh advfirewall firewall add rule name="CloudNet" dir=in action=allow program="C:\Users\Admin\AppData\Roaming\EpicNet Inc\CloudNet\cloudnet.exe" enable=yes
          4⤵
          • Modifies Windows Firewall
          PID:4852
      • C:\Windows\rss\csrss.exe
        C:\Windows\rss\csrss.exe ""
        3⤵
        • Executes dropped EXE
        • Drops file in System32 directory
        • Modifies data under HKEY_USERS
        • Modifies system certificate store
        • Suspicious behavior: EnumeratesProcesses
        PID:5092

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Windows\rss\csrss.exe

          Filesize

          3.8MB

          MD5

          8f37126c2aeb160eae109ee9371af841

          SHA1

          27b0b73093a8be6dd4e14dfecf24b17bb0030979

          SHA256

          13695895cc67645c4266ee080b8980e1ba142090e303827e9798b7c269ded5f6

          SHA512

          37776858bd14dfcb7c8e3a97cd6c0a3a1846bb1a0c17772e6f94ab7880f20f0107a84a6fd12fd6d48260ff04e003349205a13f5e2bb17daa43500a1c983e2515

        • C:\Windows\rss\csrss.exe

          Filesize

          3.8MB

          MD5

          8f37126c2aeb160eae109ee9371af841

          SHA1

          27b0b73093a8be6dd4e14dfecf24b17bb0030979

          SHA256

          13695895cc67645c4266ee080b8980e1ba142090e303827e9798b7c269ded5f6

          SHA512

          37776858bd14dfcb7c8e3a97cd6c0a3a1846bb1a0c17772e6f94ab7880f20f0107a84a6fd12fd6d48260ff04e003349205a13f5e2bb17daa43500a1c983e2515

        • memory/544-11-0x0000000001040000-0x00000000013EE000-memory.dmp

          Filesize

          3.7MB

        • memory/544-7-0x0000000000400000-0x0000000000B24000-memory.dmp

          Filesize

          7.1MB

        • memory/544-12-0x0000000000400000-0x0000000000B24000-memory.dmp

          Filesize

          7.1MB

        • memory/544-15-0x0000000000400000-0x0000000000B24000-memory.dmp

          Filesize

          7.1MB

        • memory/3020-4-0x0000000000400000-0x0000000000B24000-memory.dmp

          Filesize

          7.1MB

        • memory/3020-5-0x0000000000400000-0x0000000000B24000-memory.dmp

          Filesize

          7.1MB

        • memory/3020-6-0x0000000001150000-0x00000000014F7000-memory.dmp

          Filesize

          3.7MB

        • memory/3020-8-0x0000000000400000-0x0000000000B24000-memory.dmp

          Filesize

          7.1MB

        • memory/3020-9-0x0000000001500000-0x0000000001BEF000-memory.dmp

          Filesize

          6.9MB

        • memory/3020-0-0x0000000000400000-0x0000000000B24000-memory.dmp

          Filesize

          7.1MB

        • memory/3020-3-0x0000000001500000-0x0000000001BEF000-memory.dmp

          Filesize

          6.9MB

        • memory/3020-2-0x0000000001150000-0x00000000014F7000-memory.dmp

          Filesize

          3.7MB

        • memory/5092-18-0x0000000000400000-0x0000000000B24000-memory.dmp

          Filesize

          7.1MB

        • memory/5092-20-0x0000000001500000-0x0000000001900000-memory.dmp

          Filesize

          4.0MB

        • memory/5092-21-0x0000000001900000-0x0000000001FEF000-memory.dmp

          Filesize

          6.9MB

        • memory/5092-22-0x0000000000400000-0x0000000000B24000-memory.dmp

          Filesize

          7.1MB

        • memory/5092-25-0x0000000000400000-0x0000000000B24000-memory.dmp

          Filesize

          7.1MB

        • memory/5092-26-0x0000000001500000-0x0000000001900000-memory.dmp

          Filesize

          4.0MB

        • memory/5092-27-0x0000000000400000-0x0000000000B24000-memory.dmp

          Filesize

          7.1MB

        • memory/5092-28-0x0000000000400000-0x0000000000B24000-memory.dmp

          Filesize

          7.1MB

        • memory/5092-29-0x0000000000400000-0x0000000000B24000-memory.dmp

          Filesize

          7.1MB

        • memory/5092-30-0x0000000000400000-0x0000000000B24000-memory.dmp

          Filesize

          7.1MB

        • memory/5092-31-0x0000000000400000-0x0000000000B24000-memory.dmp

          Filesize

          7.1MB

        • memory/5092-34-0x0000000000400000-0x0000000000B24000-memory.dmp

          Filesize

          7.1MB

        • memory/5092-35-0x0000000000400000-0x0000000000B24000-memory.dmp

          Filesize

          7.1MB

        • memory/5092-39-0x0000000000400000-0x0000000000B24000-memory.dmp

          Filesize

          7.1MB

        • memory/5092-40-0x0000000000400000-0x0000000000B24000-memory.dmp

          Filesize

          7.1MB