Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-04-2024 13:20

General

  • Target

    6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd.exe

  • Size

    170KB

  • MD5

    f5fd4237e550503a8eab51ae35f147b6

  • SHA1

    869d44d58fb734b3692500dae1f42f0d6e3b3434

  • SHA256

    6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd

  • SHA512

    32327ca44e09d46ba8e656124f7480979b3eeb3769a94259d536a5223b2c532bd21654d8b4551d26265903f5c2be87a8da73d4571eee6fd9bfc887ea9e88350f

  • SSDEEP

    1536:Js5KSNeteSXSI4nZ7OyP8p7+C1xIhQ6M3dfUMJn325pDedDT50ZXXKVXRKX:e5ScSHCO1p7hiO4AI1edHK56lR

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.

  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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).

  • Program crash 2 IoCs
  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd.exe
    "C:\Users\Admin\AppData\Local\Temp\6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1460
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kdiqfnyz\
      2⤵
        PID:640
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qcsftsko.exe" C:\Windows\SysWOW64\kdiqfnyz\
        2⤵
          PID:2908
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create kdiqfnyz binPath= "C:\Windows\SysWOW64\kdiqfnyz\qcsftsko.exe /d\"C:\Users\Admin\AppData\Local\Temp\6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:664
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description kdiqfnyz "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4484
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start kdiqfnyz
          2⤵
          • Launches sc.exe
          PID:2332
        • 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:3472
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1460 -s 640
          2⤵
          • Program crash
          PID:2236
      • C:\Windows\SysWOW64\kdiqfnyz\qcsftsko.exe
        C:\Windows\SysWOW64\kdiqfnyz\qcsftsko.exe /d"C:\Users\Admin\AppData\Local\Temp\6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1056
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:4700
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1056 -s 508
          2⤵
          • Program crash
          PID:1684
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 1460 -ip 1460
        1⤵
          PID:4692
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 1056 -ip 1056
          1⤵
            PID:3744

          Network

          MITRE ATT&CK Matrix ATT&CK v13

          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

          1
          T1562

          Disable or Modify System Firewall

          1
          T1562.004

          Modify Registry

          1
          T1112

          Discovery

          Query Registry

          1
          T1012

          System Information Discovery

          2
          T1082

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            10.2MB

            MD5

            4afd30518858890d2e4cfcbd9eb9f48f

            SHA1

            29838fda0c85d9868945124467f069d6e8efa704

            SHA256

            557c980feb5b8fed0d67e34f83238bf2e50cc9dcb6c3bcee8bbbaefcdc825faa

            SHA512

            60401970ca19551d7085526b583fd144fe60c70c13caae9ceb3b7e3ead2aba76e926c50d8888b1d2aa759591fafe7373fe2bebeeb243d9078065b4251090f571

          • memory/1056-18-0x0000000000400000-0x0000000000474000-memory.dmp
            Filesize

            464KB

          • memory/1056-10-0x0000000000680000-0x0000000000780000-memory.dmp
            Filesize

            1024KB

          • memory/1056-11-0x0000000000400000-0x0000000000474000-memory.dmp
            Filesize

            464KB

          • memory/1460-1-0x0000000000670000-0x0000000000770000-memory.dmp
            Filesize

            1024KB

          • memory/1460-4-0x0000000000400000-0x0000000000474000-memory.dmp
            Filesize

            464KB

          • memory/1460-7-0x0000000000400000-0x0000000000474000-memory.dmp
            Filesize

            464KB

          • memory/1460-8-0x00000000005F0000-0x0000000000603000-memory.dmp
            Filesize

            76KB

          • memory/1460-2-0x00000000005F0000-0x0000000000603000-memory.dmp
            Filesize

            76KB

          • memory/4700-33-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/4700-37-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/4700-17-0x0000000001010000-0x0000000001025000-memory.dmp
            Filesize

            84KB

          • memory/4700-15-0x0000000001010000-0x0000000001025000-memory.dmp
            Filesize

            84KB

          • memory/4700-20-0x0000000002C00000-0x0000000002E0F000-memory.dmp
            Filesize

            2.1MB

          • memory/4700-23-0x0000000002C00000-0x0000000002E0F000-memory.dmp
            Filesize

            2.1MB

          • memory/4700-24-0x00000000023C0000-0x00000000023C6000-memory.dmp
            Filesize

            24KB

          • memory/4700-27-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/4700-30-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/4700-31-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/4700-32-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/4700-12-0x0000000001010000-0x0000000001025000-memory.dmp
            Filesize

            84KB

          • memory/4700-34-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/4700-35-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/4700-36-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/4700-16-0x0000000001010000-0x0000000001025000-memory.dmp
            Filesize

            84KB

          • memory/4700-38-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/4700-39-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/4700-40-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/4700-41-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/4700-42-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/4700-43-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/4700-44-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/4700-45-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/4700-46-0x00000000023D0000-0x00000000023E0000-memory.dmp
            Filesize

            64KB

          • memory/4700-47-0x00000000023E0000-0x00000000023E5000-memory.dmp
            Filesize

            20KB

          • memory/4700-50-0x00000000023E0000-0x00000000023E5000-memory.dmp
            Filesize

            20KB

          • memory/4700-51-0x0000000007C00000-0x000000000800B000-memory.dmp
            Filesize

            4.0MB

          • memory/4700-54-0x0000000007C00000-0x000000000800B000-memory.dmp
            Filesize

            4.0MB

          • memory/4700-55-0x00000000023F0000-0x00000000023F7000-memory.dmp
            Filesize

            28KB

          • memory/4700-59-0x0000000001010000-0x0000000001025000-memory.dmp
            Filesize

            84KB