Analysis

  • max time kernel
    149s
  • max time network
    157s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    05/09/2024, 23:41

General

  • Target

    569edae4e4c7f5df590c7ee0a96210942e2be22be73beda9bc1528addca234f4.exe

  • Size

    399KB

  • MD5

    f7ae445081e10267d2cec9b6b0e2d375

  • SHA1

    e12892ea4d092e4b959617c6d00356ee23da0797

  • SHA256

    569edae4e4c7f5df590c7ee0a96210942e2be22be73beda9bc1528addca234f4

  • SHA512

    194a260edb0ce0d6c9b74484b55d64e8d593c990ca647acf4c24dd4b58abee0e586485fb06970557d83cc97159933b55a9fa3cc9316f52c28d86552aa039ab04

  • SSDEEP

    6144:ztRdHbfGeyTf8CJH1ci6aZRVDqQP4n48rMI8gVzuhZIIQFa0lw:ztRdHbfByTU3OTBtP44cMYW

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) 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).

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • Program crash 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\569edae4e4c7f5df590c7ee0a96210942e2be22be73beda9bc1528addca234f4.exe
    "C:\Users\Admin\AppData\Local\Temp\569edae4e4c7f5df590c7ee0a96210942e2be22be73beda9bc1528addca234f4.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2720
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ldhpnlre\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4548
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xjvaxdcq.exe" C:\Windows\SysWOW64\ldhpnlre\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2056
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create ldhpnlre binPath= "C:\Windows\SysWOW64\ldhpnlre\xjvaxdcq.exe /d\"C:\Users\Admin\AppData\Local\Temp\569edae4e4c7f5df590c7ee0a96210942e2be22be73beda9bc1528addca234f4.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2948
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description ldhpnlre "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2964
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start ldhpnlre
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1884
    • 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
      • Event Triggered Execution: Netsh Helper DLL
      • System Location Discovery: System Language Discovery
      PID:4848
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2720 -s 708
      2⤵
      • Program crash
      PID:3524
  • C:\Windows\SysWOW64\ldhpnlre\xjvaxdcq.exe
    C:\Windows\SysWOW64\ldhpnlre\xjvaxdcq.exe /d"C:\Users\Admin\AppData\Local\Temp\569edae4e4c7f5df590c7ee0a96210942e2be22be73beda9bc1528addca234f4.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1216
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      PID:2180
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1216 -s 540
      2⤵
      • Program crash
      PID:1560
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 2720 -ip 2720
    1⤵
      PID:4908
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 1216 -ip 1216
      1⤵
        PID:852

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\xjvaxdcq.exe

        Filesize

        11.0MB

        MD5

        43087b5e62f824860bdb99a1285db976

        SHA1

        4fccae611b9cacf47ff29193af3c38c7ed5ad89d

        SHA256

        a8e7684df7948974524a3d350d60a7e23fe54b7558a9ef254c00e06d79ad09ff

        SHA512

        b2c8d6b1066d6402ae8c6b5269de3bc732fb4527426e8e3449a93e3115fe5db454e0b4d2aaf991e6eb29cdee27a7b34d54025ebe49961b5eeb46c6275ededde9

      • memory/1216-15-0x0000000000400000-0x000000000247C000-memory.dmp

        Filesize

        32.5MB

      • memory/2180-41-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/2180-40-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/2180-51-0x0000000007040000-0x000000000744B000-memory.dmp

        Filesize

        4.0MB

      • memory/2180-27-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/2180-20-0x0000000002000000-0x000000000220F000-memory.dmp

        Filesize

        2.1MB

      • memory/2180-11-0x0000000000190000-0x00000000001A5000-memory.dmp

        Filesize

        84KB

      • memory/2180-13-0x0000000000190000-0x00000000001A5000-memory.dmp

        Filesize

        84KB

      • memory/2180-14-0x0000000000190000-0x00000000001A5000-memory.dmp

        Filesize

        84KB

      • memory/2180-21-0x00000000003F0000-0x00000000003F6000-memory.dmp

        Filesize

        24KB

      • memory/2180-17-0x0000000002000000-0x000000000220F000-memory.dmp

        Filesize

        2.1MB

      • memory/2180-49-0x0000000007040000-0x000000000744B000-memory.dmp

        Filesize

        4.0MB

      • memory/2180-52-0x00000000025D0000-0x00000000025D7000-memory.dmp

        Filesize

        28KB

      • memory/2180-47-0x00000000017F0000-0x00000000017F5000-memory.dmp

        Filesize

        20KB

      • memory/2180-45-0x00000000017F0000-0x00000000017F5000-memory.dmp

        Filesize

        20KB

      • memory/2180-43-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/2180-42-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/2180-24-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/2180-28-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/2180-39-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/2180-38-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/2180-37-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/2180-36-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/2180-35-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/2180-34-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/2180-33-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/2180-32-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/2180-31-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/2180-30-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/2180-29-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/2720-1-0x00000000027B0000-0x00000000028B0000-memory.dmp

        Filesize

        1024KB

      • memory/2720-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2720-2-0x00000000025C0000-0x00000000025D3000-memory.dmp

        Filesize

        76KB

      • memory/2720-7-0x0000000000400000-0x000000000247C000-memory.dmp

        Filesize

        32.5MB

      • memory/2720-9-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2720-8-0x00000000025C0000-0x00000000025D3000-memory.dmp

        Filesize

        76KB