Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20240419-en
  • resource tags

    arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
  • submitted
    21-05-2024 02:39

General

  • Target

    cc3ac85b3c5690d542ed9f3266b9bd83.exe

  • Size

    204KB

  • MD5

    cc3ac85b3c5690d542ed9f3266b9bd83

  • SHA1

    af14f36d9412a1c79453a622a5ad343cc01ca6f7

  • SHA256

    8eb33da353d3756d8cd4cb9308fd5ef72a9b35441bec41fd17c3f3ee508ea9ab

  • SHA512

    f250d0f37cd513dd6e647355bd1940d7210093eb27a1bf2d6dbe6ef8673af731c7dccef24c9948a36ac4e06a18803c9082fb7db7ba59a5ecbf94d064981c6a74

  • SSDEEP

    3072:hpBsWcSkjvEOx+ss6IR15t471Z6/MJlJnmd772g+iBGLYS:h87S4PIj54brGj+i6Y

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Windows security bypass 2 TTPs 1 IoCs
  • Creates new service(s) 2 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Launches sc.exe 3 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\cc3ac85b3c5690d542ed9f3266b9bd83.exe
    "C:\Users\Admin\AppData\Local\Temp\cc3ac85b3c5690d542ed9f3266b9bd83.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2424
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\arzpbtfr\
      2⤵
        PID:1656
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bqipusxp.exe" C:\Windows\SysWOW64\arzpbtfr\
        2⤵
          PID:2128
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create arzpbtfr binPath= "C:\Windows\SysWOW64\arzpbtfr\bqipusxp.exe /d\"C:\Users\Admin\AppData\Local\Temp\cc3ac85b3c5690d542ed9f3266b9bd83.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2712
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description arzpbtfr "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2672
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start arzpbtfr
          2⤵
          • Launches sc.exe
          PID:2788
        • C:\Windows\SysWOW64\netsh.exe
          "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
          2⤵
          • Modifies Windows Firewall
          PID:2920
      • C:\Windows\SysWOW64\arzpbtfr\bqipusxp.exe
        C:\Windows\SysWOW64\arzpbtfr\bqipusxp.exe /d"C:\Users\Admin\AppData\Local\Temp\cc3ac85b3c5690d542ed9f3266b9bd83.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2524
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:2688

      Network

      MITRE ATT&CK Matrix ATT&CK v13

      Execution

      System Services

      1
      T1569

      Service Execution

      1
      T1569.002

      Persistence

      Create or Modify System Process

      2
      T1543

      Windows Service

      2
      T1543.003

      Boot or Logon Autostart Execution

      1
      T1547

      Registry Run Keys / Startup Folder

      1
      T1547.001

      Privilege Escalation

      Create or Modify System Process

      2
      T1543

      Windows Service

      2
      T1543.003

      Boot or Logon Autostart Execution

      1
      T1547

      Registry Run Keys / Startup Folder

      1
      T1547.001

      Defense Evasion

      Impair Defenses

      2
      T1562

      Disable or Modify Tools

      1
      T1562.001

      Disable or Modify System Firewall

      1
      T1562.004

      Modify Registry

      2
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\bqipusxp.exe
        Filesize

        14.1MB

        MD5

        4578a67f371ae137b8a41d01d3f06b81

        SHA1

        afe56b6ba27b6a0bf5d29592447a835c64c3ee0f

        SHA256

        b10aaee7ac8b25bb949636f62b87881b5b2490f98c04227d4e0d360ef51e850d

        SHA512

        dfc98c0553c2f87075e0b36dd0ce73b00630f6cb2833fb3b6f90fc94b6d4d0661c4e87f48a6c162191249d70aad018ee21f46cca9ff1f958e35b0f2029cbe206

      • memory/2424-1-0x0000000000620000-0x0000000000720000-memory.dmp
        Filesize

        1024KB

      • memory/2424-3-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/2424-4-0x0000000000400000-0x0000000000415000-memory.dmp
        Filesize

        84KB

      • memory/2424-7-0x0000000000400000-0x000000000047D000-memory.dmp
        Filesize

        500KB

      • memory/2424-8-0x0000000000400000-0x0000000000415000-memory.dmp
        Filesize

        84KB

      • memory/2524-16-0x0000000000400000-0x000000000047D000-memory.dmp
        Filesize

        500KB

      • memory/2688-44-0x0000000000270000-0x0000000000280000-memory.dmp
        Filesize

        64KB

      • memory/2688-40-0x0000000000270000-0x0000000000280000-memory.dmp
        Filesize

        64KB

      • memory/2688-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2688-10-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2688-17-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2688-19-0x00000000018A0000-0x0000000001AAF000-memory.dmp
        Filesize

        2.1MB

      • memory/2688-49-0x0000000000280000-0x0000000000285000-memory.dmp
        Filesize

        20KB

      • memory/2688-54-0x0000000000290000-0x0000000000297000-memory.dmp
        Filesize

        28KB

      • memory/2688-51-0x0000000005620000-0x0000000005A2B000-memory.dmp
        Filesize

        4.0MB

      • memory/2688-46-0x0000000000280000-0x0000000000285000-memory.dmp
        Filesize

        20KB

      • memory/2688-45-0x0000000000270000-0x0000000000280000-memory.dmp
        Filesize

        64KB

      • memory/2688-15-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2688-43-0x0000000000270000-0x0000000000280000-memory.dmp
        Filesize

        64KB

      • memory/2688-42-0x0000000000270000-0x0000000000280000-memory.dmp
        Filesize

        64KB

      • memory/2688-41-0x0000000000270000-0x0000000000280000-memory.dmp
        Filesize

        64KB

      • memory/2688-13-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2688-39-0x0000000000270000-0x0000000000280000-memory.dmp
        Filesize

        64KB

      • memory/2688-38-0x0000000000270000-0x0000000000280000-memory.dmp
        Filesize

        64KB

      • memory/2688-37-0x0000000000270000-0x0000000000280000-memory.dmp
        Filesize

        64KB

      • memory/2688-36-0x0000000000270000-0x0000000000280000-memory.dmp
        Filesize

        64KB

      • memory/2688-35-0x0000000000270000-0x0000000000280000-memory.dmp
        Filesize

        64KB

      • memory/2688-34-0x0000000000270000-0x0000000000280000-memory.dmp
        Filesize

        64KB

      • memory/2688-33-0x0000000000270000-0x0000000000280000-memory.dmp
        Filesize

        64KB

      • memory/2688-32-0x0000000000270000-0x0000000000280000-memory.dmp
        Filesize

        64KB

      • memory/2688-31-0x0000000000270000-0x0000000000280000-memory.dmp
        Filesize

        64KB

      • memory/2688-30-0x0000000000270000-0x0000000000280000-memory.dmp
        Filesize

        64KB

      • memory/2688-29-0x0000000000270000-0x0000000000280000-memory.dmp
        Filesize

        64KB

      • memory/2688-26-0x0000000000270000-0x0000000000280000-memory.dmp
        Filesize

        64KB

      • memory/2688-23-0x0000000000110000-0x0000000000116000-memory.dmp
        Filesize

        24KB

      • memory/2688-22-0x00000000018A0000-0x0000000001AAF000-memory.dmp
        Filesize

        2.1MB

      • memory/2688-53-0x0000000005620000-0x0000000005A2B000-memory.dmp
        Filesize

        4.0MB