Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    04/09/2024, 09:47

General

  • Target

    a8264147bc22a02d977fa5d57b3169ccbc313dc35ba2b788da0cb7dce84f0b02.exe

  • Size

    190KB

  • MD5

    62947f28aedffbba7b8424fa764d33ac

  • SHA1

    baca398418a7e83b07ae924694897428660f936a

  • SHA256

    a8264147bc22a02d977fa5d57b3169ccbc313dc35ba2b788da0cb7dce84f0b02

  • SHA512

    5be7ecc2c6ec5056cc9db02fb0e8f694154a55bafa96f2943ead5c2b0730ddbcb82739ea6b2769fb93fee62bc15a9b2bc30de24d90dcc40cc64be6186f2b9279

  • SSDEEP

    3072:aH+lBBpz9/vh9yx37T/xvyNvypa7spopsUyqpr3xFbQ:nBpz9/vh9yxrbxvyN/pdJtz

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\a8264147bc22a02d977fa5d57b3169ccbc313dc35ba2b788da0cb7dce84f0b02.exe
    "C:\Users\Admin\AppData\Local\Temp\a8264147bc22a02d977fa5d57b3169ccbc313dc35ba2b788da0cb7dce84f0b02.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2156
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\eveornwt\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:904
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zgnqftmw.exe" C:\Windows\SysWOW64\eveornwt\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:688
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create eveornwt binPath= "C:\Windows\SysWOW64\eveornwt\zgnqftmw.exe /d\"C:\Users\Admin\AppData\Local\Temp\a8264147bc22a02d977fa5d57b3169ccbc313dc35ba2b788da0cb7dce84f0b02.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3028
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description eveornwt "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3348
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start eveornwt
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2936
    • 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:1028
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2156 -s 600
      2⤵
      • Program crash
      PID:3740
  • C:\Windows\SysWOW64\eveornwt\zgnqftmw.exe
    C:\Windows\SysWOW64\eveornwt\zgnqftmw.exe /d"C:\Users\Admin\AppData\Local\Temp\a8264147bc22a02d977fa5d57b3169ccbc313dc35ba2b788da0cb7dce84f0b02.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3316
    • 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:4428
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3316 -s 560
      2⤵
      • Program crash
      PID:4948
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 2156 -ip 2156
    1⤵
      PID:2240
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 3316 -ip 3316
      1⤵
        PID:3792

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        11.2MB

        MD5

        f7c61c79a172faa8d746f3ba08206bb4

        SHA1

        6c84ebc490bdba5bc7d2616c8713ce1d557ff3f4

        SHA256

        1092e58af9b20c11d6ffbaefb93e1614c5ee5b708b64260f9c922ea137317372

        SHA512

        9150e6537d1c2a7a8f4dff8e34ee353620d6dc261cbf1c0d205d84aae1bc37c2e8b9509558154b70f19ba094471c5c58253cd2a30264c94ef4f314125c03da4d

      • memory/2156-2-0x0000000002290000-0x00000000022A3000-memory.dmp

        Filesize

        76KB

      • memory/2156-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2156-7-0x0000000000400000-0x0000000000437000-memory.dmp

        Filesize

        220KB

      • memory/2156-9-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2156-8-0x0000000002290000-0x00000000022A3000-memory.dmp

        Filesize

        76KB

      • memory/2156-1-0x00000000005E0000-0x00000000006E0000-memory.dmp

        Filesize

        1024KB

      • memory/3316-15-0x0000000000400000-0x0000000000437000-memory.dmp

        Filesize

        220KB

      • memory/4428-41-0x0000000001BC0000-0x0000000001BD0000-memory.dmp

        Filesize

        64KB

      • memory/4428-36-0x0000000001BC0000-0x0000000001BD0000-memory.dmp

        Filesize

        64KB

      • memory/4428-13-0x0000000000640000-0x0000000000655000-memory.dmp

        Filesize

        84KB

      • memory/4428-31-0x0000000001BC0000-0x0000000001BD0000-memory.dmp

        Filesize

        64KB

      • memory/4428-52-0x0000000001BE0000-0x0000000001BE7000-memory.dmp

        Filesize

        28KB

      • memory/4428-48-0x0000000007300000-0x000000000770B000-memory.dmp

        Filesize

        4.0MB

      • memory/4428-47-0x0000000001BD0000-0x0000000001BD5000-memory.dmp

        Filesize

        20KB

      • memory/4428-44-0x0000000001BD0000-0x0000000001BD5000-memory.dmp

        Filesize

        20KB

      • memory/4428-43-0x0000000001BC0000-0x0000000001BD0000-memory.dmp

        Filesize

        64KB

      • memory/4428-42-0x0000000001BC0000-0x0000000001BD0000-memory.dmp

        Filesize

        64KB

      • memory/4428-11-0x0000000000640000-0x0000000000655000-memory.dmp

        Filesize

        84KB

      • memory/4428-40-0x0000000001BC0000-0x0000000001BD0000-memory.dmp

        Filesize

        64KB

      • memory/4428-39-0x0000000001BC0000-0x0000000001BD0000-memory.dmp

        Filesize

        64KB

      • memory/4428-38-0x0000000001BC0000-0x0000000001BD0000-memory.dmp

        Filesize

        64KB

      • memory/4428-37-0x0000000001BC0000-0x0000000001BD0000-memory.dmp

        Filesize

        64KB

      • memory/4428-14-0x0000000000640000-0x0000000000655000-memory.dmp

        Filesize

        84KB

      • memory/4428-35-0x0000000001BC0000-0x0000000001BD0000-memory.dmp

        Filesize

        64KB

      • memory/4428-34-0x0000000001BC0000-0x0000000001BD0000-memory.dmp

        Filesize

        64KB

      • memory/4428-33-0x0000000001BC0000-0x0000000001BD0000-memory.dmp

        Filesize

        64KB

      • memory/4428-32-0x0000000001BC0000-0x0000000001BD0000-memory.dmp

        Filesize

        64KB

      • memory/4428-30-0x0000000001BC0000-0x0000000001BD0000-memory.dmp

        Filesize

        64KB

      • memory/4428-29-0x0000000001BC0000-0x0000000001BD0000-memory.dmp

        Filesize

        64KB

      • memory/4428-27-0x0000000001BC0000-0x0000000001BD0000-memory.dmp

        Filesize

        64KB

      • memory/4428-51-0x0000000007300000-0x000000000770B000-memory.dmp

        Filesize

        4.0MB

      • memory/4428-24-0x0000000001BC0000-0x0000000001BD0000-memory.dmp

        Filesize

        64KB

      • memory/4428-21-0x0000000001BB0000-0x0000000001BB6000-memory.dmp

        Filesize

        24KB

      • memory/4428-20-0x0000000002400000-0x000000000260F000-memory.dmp

        Filesize

        2.1MB

      • memory/4428-28-0x0000000001BC0000-0x0000000001BD0000-memory.dmp

        Filesize

        64KB

      • memory/4428-18-0x0000000002400000-0x000000000260F000-memory.dmp

        Filesize

        2.1MB