Analysis

  • max time kernel
    145s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-09-2024 10:51

General

  • Target

    892d52a127cf179e7f2430a3089d6751.exe

  • Size

    13.7MB

  • MD5

    892d52a127cf179e7f2430a3089d6751

  • SHA1

    37d424fbb05030b85372619f90d49dfb3163b516

  • SHA256

    0e9c337b32f1b91661c0aa92183242ca766a24f0e2ced39622076a00f07324db

  • SHA512

    80a284d3ec88d27f78d78cb40de26f0e57ab36c09ebc302dca668196f95c6cf4bd09181c1f2e64bc77e326a5f8994110075d185fc7b845e2314c54923a901960

  • SSDEEP

    12288:qkcLVukCo8F8JeMeMeMeMeMeMeMeMeMeMeMeMeMeMeMeMeMeMeMeMeMeMeMeMeMu:qkkYkCoD

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

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
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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 6 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\892d52a127cf179e7f2430a3089d6751.exe
    "C:\Users\Admin\AppData\Local\Temp\892d52a127cf179e7f2430a3089d6751.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3304
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wzfawsgj\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3532
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qtczngyh.exe" C:\Windows\SysWOW64\wzfawsgj\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2872
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create wzfawsgj binPath= "C:\Windows\SysWOW64\wzfawsgj\qtczngyh.exe /d\"C:\Users\Admin\AppData\Local\Temp\892d52a127cf179e7f2430a3089d6751.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4324
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description wzfawsgj "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2428
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start wzfawsgj
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4924
    • 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:1576
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3304 -s 1040
      2⤵
      • Program crash
      PID:1760
  • C:\Windows\SysWOW64\wzfawsgj\qtczngyh.exe
    C:\Windows\SysWOW64\wzfawsgj\qtczngyh.exe /d"C:\Users\Admin\AppData\Local\Temp\892d52a127cf179e7f2430a3089d6751.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1948
    • 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:1820
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1948 -s 520
      2⤵
      • Program crash
      PID:3988
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 3304 -ip 3304
    1⤵
      PID:2612
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 1948 -ip 1948
      1⤵
        PID:1044

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        14.0MB

        MD5

        134fb4dec5f0008c76e904b2371ca56e

        SHA1

        71be57e024a4cb5a13b75a8c542563ba87d52d4d

        SHA256

        00ce47fa829a8aba17216bec90b172cfdaf1dee157aaf09c542564e54e301922

        SHA512

        262c50325ab62402aecced86a289523ccc519a65a0954036544011da34653fcf52fc1c8ea7eb59caed0298e085a3b6f2d3e3751ed5e4d1df527a49f89628e369

      • memory/1820-42-0x0000000001BF0000-0x0000000001C00000-memory.dmp

        Filesize

        64KB

      • memory/1820-8-0x0000000000660000-0x0000000000675000-memory.dmp

        Filesize

        84KB

      • memory/1820-51-0x0000000007700000-0x0000000007B0B000-memory.dmp

        Filesize

        4.0MB

      • memory/1820-20-0x0000000002800000-0x0000000002A0F000-memory.dmp

        Filesize

        2.1MB

      • memory/1820-21-0x0000000001BE0000-0x0000000001BE6000-memory.dmp

        Filesize

        24KB

      • memory/1820-24-0x0000000001BF0000-0x0000000001C00000-memory.dmp

        Filesize

        64KB

      • memory/1820-27-0x0000000001BF0000-0x0000000001C00000-memory.dmp

        Filesize

        64KB

      • memory/1820-28-0x0000000001BF0000-0x0000000001C00000-memory.dmp

        Filesize

        64KB

      • memory/1820-14-0x0000000000660000-0x0000000000675000-memory.dmp

        Filesize

        84KB

      • memory/1820-15-0x0000000000660000-0x0000000000675000-memory.dmp

        Filesize

        84KB

      • memory/1820-18-0x0000000002800000-0x0000000002A0F000-memory.dmp

        Filesize

        2.1MB

      • memory/1820-47-0x0000000002BD0000-0x0000000002BD5000-memory.dmp

        Filesize

        20KB

      • memory/1820-52-0x0000000002BE0000-0x0000000002BE7000-memory.dmp

        Filesize

        28KB

      • memory/1820-48-0x0000000007700000-0x0000000007B0B000-memory.dmp

        Filesize

        4.0MB

      • memory/1820-44-0x0000000002BD0000-0x0000000002BD5000-memory.dmp

        Filesize

        20KB

      • memory/1820-43-0x0000000001BF0000-0x0000000001C00000-memory.dmp

        Filesize

        64KB

      • memory/1820-29-0x0000000001BF0000-0x0000000001C00000-memory.dmp

        Filesize

        64KB

      • memory/1820-41-0x0000000001BF0000-0x0000000001C00000-memory.dmp

        Filesize

        64KB

      • memory/1820-30-0x0000000001BF0000-0x0000000001C00000-memory.dmp

        Filesize

        64KB

      • memory/1820-40-0x0000000001BF0000-0x0000000001C00000-memory.dmp

        Filesize

        64KB

      • memory/1820-39-0x0000000001BF0000-0x0000000001C00000-memory.dmp

        Filesize

        64KB

      • memory/1820-38-0x0000000001BF0000-0x0000000001C00000-memory.dmp

        Filesize

        64KB

      • memory/1820-37-0x0000000001BF0000-0x0000000001C00000-memory.dmp

        Filesize

        64KB

      • memory/1820-36-0x0000000001BF0000-0x0000000001C00000-memory.dmp

        Filesize

        64KB

      • memory/1820-35-0x0000000001BF0000-0x0000000001C00000-memory.dmp

        Filesize

        64KB

      • memory/1820-34-0x0000000001BF0000-0x0000000001C00000-memory.dmp

        Filesize

        64KB

      • memory/1820-33-0x0000000001BF0000-0x0000000001C00000-memory.dmp

        Filesize

        64KB

      • memory/1820-32-0x0000000001BF0000-0x0000000001C00000-memory.dmp

        Filesize

        64KB

      • memory/1820-31-0x0000000001BF0000-0x0000000001C00000-memory.dmp

        Filesize

        64KB

      • memory/1948-10-0x0000000000400000-0x0000000002C6C000-memory.dmp

        Filesize

        40.4MB

      • memory/3304-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3304-2-0x00000000049B0000-0x00000000049C3000-memory.dmp

        Filesize

        76KB

      • memory/3304-11-0x0000000000400000-0x0000000002C6C000-memory.dmp

        Filesize

        40.4MB

      • memory/3304-12-0x00000000049B0000-0x00000000049C3000-memory.dmp

        Filesize

        76KB

      • memory/3304-13-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3304-1-0x0000000002CE0000-0x0000000002DE0000-memory.dmp

        Filesize

        1024KB