Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    11-05-2024 08:17

General

  • Target

    dc126faa29a2e26dbd95134059e682c28afee0e1a3d2573584c8226d838f735d.exe

  • Size

    11.1MB

  • MD5

    0ad58678a408902fd64f7af414738868

  • SHA1

    c3f7da6f93660d26259ceafb4c4d13cb7160455e

  • SHA256

    dc126faa29a2e26dbd95134059e682c28afee0e1a3d2573584c8226d838f735d

  • SHA512

    2f441ca748ec8cd9e94a6759979caa64c30c1d10ba6931cf36288dd65596bc9445dec79d2b47bf3e2d9e82358a5ca05574513123c49f0eba23470585d3e68e54

  • SSDEEP

    12288:mSpmG/1+U3VGAnqy5iXBhULiprrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr:L/1+U3Q6ixyLi

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 6 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\dc126faa29a2e26dbd95134059e682c28afee0e1a3d2573584c8226d838f735d.exe
    "C:\Users\Admin\AppData\Local\Temp\dc126faa29a2e26dbd95134059e682c28afee0e1a3d2573584c8226d838f735d.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2960
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tkmnjecr\
      2⤵
        PID:2932
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xmelqotl.exe" C:\Windows\SysWOW64\tkmnjecr\
        2⤵
          PID:2168
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create tkmnjecr binPath= "C:\Windows\SysWOW64\tkmnjecr\xmelqotl.exe /d\"C:\Users\Admin\AppData\Local\Temp\dc126faa29a2e26dbd95134059e682c28afee0e1a3d2573584c8226d838f735d.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2920
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description tkmnjecr "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2644
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start tkmnjecr
          2⤵
          • Launches sc.exe
          PID:2636
        • 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:2548
      • C:\Windows\SysWOW64\tkmnjecr\xmelqotl.exe
        C:\Windows\SysWOW64\tkmnjecr\xmelqotl.exe /d"C:\Users\Admin\AppData\Local\Temp\dc126faa29a2e26dbd95134059e682c28afee0e1a3d2573584c8226d838f735d.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2280
        • 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:768

      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\xmelqotl.exe
        Filesize

        11.3MB

        MD5

        4b189c065a087b1f675b3e40f579ffd9

        SHA1

        2258a8f743fd0c382f310143e51bb2816b77291a

        SHA256

        9492fea4d3990f56c55e3c1506f1843e6321a79fd8b37aa64e155fd7b6c95326

        SHA512

        c3b055037a184cf85ee7de6bedea80c87090814cb2450034963cf2effa40a024d34b831044fee81f65b515f59a1d9dc6479006d9f638dbaeb28d386a6759e2bb

      • memory/768-39-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/768-41-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/768-40-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/768-32-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/768-42-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/768-43-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/768-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/768-17-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/768-31-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/768-14-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/768-11-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/768-18-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/768-20-0x00000000018D0000-0x0000000001ADF000-memory.dmp
        Filesize

        2.1MB

      • memory/768-51-0x00000000054E0000-0x00000000058EB000-memory.dmp
        Filesize

        4.0MB

      • memory/768-23-0x00000000018D0000-0x0000000001ADF000-memory.dmp
        Filesize

        2.1MB

      • memory/768-24-0x0000000000120000-0x0000000000126000-memory.dmp
        Filesize

        24KB

      • memory/768-27-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/768-30-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/768-44-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/768-45-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/768-37-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/768-34-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/768-35-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/768-36-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/768-38-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/768-33-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/768-46-0x0000000000130000-0x0000000000140000-memory.dmp
        Filesize

        64KB

      • memory/768-47-0x0000000000140000-0x0000000000145000-memory.dmp
        Filesize

        20KB

      • memory/768-54-0x00000000054E0000-0x00000000058EB000-memory.dmp
        Filesize

        4.0MB

      • memory/768-55-0x00000000001B0000-0x00000000001B7000-memory.dmp
        Filesize

        28KB

      • memory/768-50-0x0000000000140000-0x0000000000145000-memory.dmp
        Filesize

        20KB

      • memory/2280-15-0x0000000000400000-0x00000000004DA000-memory.dmp
        Filesize

        872KB

      • memory/2960-1-0x0000000000680000-0x0000000000780000-memory.dmp
        Filesize

        1024KB

      • memory/2960-4-0x0000000000400000-0x0000000000415000-memory.dmp
        Filesize

        84KB

      • memory/2960-7-0x0000000000400000-0x00000000004DA000-memory.dmp
        Filesize

        872KB

      • memory/2960-8-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/2960-9-0x0000000000400000-0x0000000000415000-memory.dmp
        Filesize

        84KB

      • memory/2960-2-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB