Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20-07-2024 22:08

General

  • Target

    61e48789ffe85d3f4ad3a4b35888db4760d2cac61f032befe8284f94b32684aa.exe

  • Size

    292KB

  • MD5

    cd2867400d86adf084a13deec86d2c39

  • SHA1

    92263b1eef5d2e25cfb0c5060f3b9e25cd69779f

  • SHA256

    61e48789ffe85d3f4ad3a4b35888db4760d2cac61f032befe8284f94b32684aa

  • SHA512

    3b6225ea43362c8c468f3bf37cd2365ae447efe7c1a347504ef10aeead0e0c602f5bae3270efe738ee82630880a4b8637904c484eabd85eb22670764f4479d4b

  • SSDEEP

    3072:Aw2bSHEENJRNgwkvXKATeyRhJLcXm65tz3CnfBpg23ic9gvL4Z:L2bNWJRz2Xnh+H5t7CnJp7uj4

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
  • 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).

  • 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
  • Modifies data under HKEY_USERS 6 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\61e48789ffe85d3f4ad3a4b35888db4760d2cac61f032befe8284f94b32684aa.exe
    "C:\Users\Admin\AppData\Local\Temp\61e48789ffe85d3f4ad3a4b35888db4760d2cac61f032befe8284f94b32684aa.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1932
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ztdndtmq\
      2⤵
        PID:4176
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dxxpscgs.exe" C:\Windows\SysWOW64\ztdndtmq\
        2⤵
          PID:4652
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ztdndtmq binPath= "C:\Windows\SysWOW64\ztdndtmq\dxxpscgs.exe /d\"C:\Users\Admin\AppData\Local\Temp\61e48789ffe85d3f4ad3a4b35888db4760d2cac61f032befe8284f94b32684aa.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1020
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ztdndtmq "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2308
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ztdndtmq
          2⤵
          • Launches sc.exe
          PID:1840
        • 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
          PID:4132
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1932 -s 772
          2⤵
          • Program crash
          PID:1936
      • C:\Windows\SysWOW64\ztdndtmq\dxxpscgs.exe
        C:\Windows\SysWOW64\ztdndtmq\dxxpscgs.exe /d"C:\Users\Admin\AppData\Local\Temp\61e48789ffe85d3f4ad3a4b35888db4760d2cac61f032befe8284f94b32684aa.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1648
        • 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:3596
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1648 -s 512
          2⤵
          • Program crash
          PID:1000
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 1932 -ip 1932
        1⤵
          PID:5068
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 1648 -ip 1648
          1⤵
            PID:1260

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            10.8MB

            MD5

            6f2c4a6123afe24e3332f8efbbb9921f

            SHA1

            561ca2eb562770555f78f2b1c79748d425e2452c

            SHA256

            866186a12f403520b6cdd3de5406354aadf73c1213a96874a843a2ce07c20d7c

            SHA512

            ce50f8ba1eacf26ad3b0cc765d71438901d87c8784630a24d8b744be917baa5726ea49c20be7fbe3f8f3ce0603c9eabd2538ce7b0f1f9fcd5925bc95f7b9caea

          • memory/1648-15-0x0000000000400000-0x0000000002462000-memory.dmp
            Filesize

            32.4MB

          • memory/1932-2-0x0000000002610000-0x0000000002623000-memory.dmp
            Filesize

            76KB

          • memory/1932-3-0x0000000000400000-0x0000000000415000-memory.dmp
            Filesize

            84KB

          • memory/1932-7-0x0000000000400000-0x0000000002462000-memory.dmp
            Filesize

            32.4MB

          • memory/1932-9-0x0000000000400000-0x0000000000415000-memory.dmp
            Filesize

            84KB

          • memory/1932-8-0x0000000002610000-0x0000000002623000-memory.dmp
            Filesize

            76KB

          • memory/1932-1-0x00000000026E0000-0x00000000027E0000-memory.dmp
            Filesize

            1024KB

          • memory/3596-41-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3596-36-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3596-13-0x00000000009A0000-0x00000000009B5000-memory.dmp
            Filesize

            84KB

          • memory/3596-43-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3596-52-0x0000000002DE0000-0x0000000002DE7000-memory.dmp
            Filesize

            28KB

          • memory/3596-51-0x0000000007780000-0x0000000007B8B000-memory.dmp
            Filesize

            4.0MB

          • memory/3596-48-0x0000000007780000-0x0000000007B8B000-memory.dmp
            Filesize

            4.0MB

          • memory/3596-47-0x0000000002DD0000-0x0000000002DD5000-memory.dmp
            Filesize

            20KB

          • memory/3596-44-0x0000000002DD0000-0x0000000002DD5000-memory.dmp
            Filesize

            20KB

          • memory/3596-42-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3596-11-0x00000000009A0000-0x00000000009B5000-memory.dmp
            Filesize

            84KB

          • memory/3596-40-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3596-39-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3596-38-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3596-37-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3596-14-0x00000000009A0000-0x00000000009B5000-memory.dmp
            Filesize

            84KB

          • memory/3596-35-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3596-33-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3596-32-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3596-31-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3596-30-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3596-29-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3596-28-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3596-27-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3596-24-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3596-21-0x0000000001F60000-0x0000000001F66000-memory.dmp
            Filesize

            24KB

          • memory/3596-20-0x0000000002800000-0x0000000002A0F000-memory.dmp
            Filesize

            2.1MB

          • memory/3596-34-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3596-17-0x0000000002800000-0x0000000002A0F000-memory.dmp
            Filesize

            2.1MB