Analysis

  • max time kernel
    119s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    18-09-2024 21:46

General

  • Target

    a6be4a8bc3e95b9f707e9b35bdd31dcfae4aa4c88dc8fb7187353908002976d3N.exe

  • Size

    71KB

  • MD5

    c3c6af010d771458681fd41cdafa8990

  • SHA1

    48ee35b3354051a816ea68430836c8eaab5e8184

  • SHA256

    a6be4a8bc3e95b9f707e9b35bdd31dcfae4aa4c88dc8fb7187353908002976d3

  • SHA512

    070e1669564535e656e20ca9b14662613d14764773486694dc0ced8c9d08448c69d2ceaa88b9f08b546352f288e71b1832231982f9895d3a8b7b02bfabee82ae

  • SSDEEP

    1536:Dkes21VCy1nTxSYg3CXTjFWL9ddpIHUc:DDVCyFxSYACXFMpI0

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.

  • Windows security bypass 2 TTPs 1 IoCs
  • 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.

  • 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 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a6be4a8bc3e95b9f707e9b35bdd31dcfae4aa4c88dc8fb7187353908002976d3N.exe
    "C:\Users\Admin\AppData\Local\Temp\a6be4a8bc3e95b9f707e9b35bdd31dcfae4aa4c88dc8fb7187353908002976d3N.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1172
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mcqjxkbh\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2456
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gnmzhhpt.exe" C:\Windows\SysWOW64\mcqjxkbh\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2464
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create mcqjxkbh binPath= "C:\Windows\SysWOW64\mcqjxkbh\gnmzhhpt.exe /d\"C:\Users\Admin\AppData\Local\Temp\a6be4a8bc3e95b9f707e9b35bdd31dcfae4aa4c88dc8fb7187353908002976d3N.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2080
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description mcqjxkbh "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2640
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start mcqjxkbh
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2792
    • 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:2584
  • C:\Windows\SysWOW64\mcqjxkbh\gnmzhhpt.exe
    C:\Windows\SysWOW64\mcqjxkbh\gnmzhhpt.exe /d"C:\Users\Admin\AppData\Local\Temp\a6be4a8bc3e95b9f707e9b35bdd31dcfae4aa4c88dc8fb7187353908002976d3N.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3008
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Windows security bypass
      • 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:2172

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    11.6MB

    MD5

    b6a9b70e36e16ad39da8f621d8be88b5

    SHA1

    03efd4c045b34bc0c2b0d51ec58e10550074c06f

    SHA256

    a92e39efea1aecd9aa613a1228de624382331d1102849cc240ef161f48ce0526

    SHA512

    e87a3e4a9fd988dd2f1f04f524830945ce0212d0817c780648d5c4d57928bee0830302b6fe4eed438e420b4ef075214c37a1b11ed96bacb454ff9374fb130ffe

  • memory/2172-6-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2172-5-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2172-3-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2172-8-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2172-9-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2172-11-0x0000000001910000-0x0000000001B1F000-memory.dmp

    Filesize

    2.1MB

  • memory/2172-14-0x0000000001910000-0x0000000001B1F000-memory.dmp

    Filesize

    2.1MB

  • memory/2172-15-0x00000000000A0000-0x00000000000A6000-memory.dmp

    Filesize

    24KB

  • memory/2172-18-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2172-21-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2172-28-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2172-41-0x0000000000100000-0x0000000000105000-memory.dmp

    Filesize

    20KB

  • memory/2172-38-0x0000000000100000-0x0000000000105000-memory.dmp

    Filesize

    20KB

  • memory/2172-37-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2172-36-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2172-35-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2172-34-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2172-33-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2172-32-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2172-31-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2172-30-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2172-29-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2172-27-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2172-26-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2172-25-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2172-24-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2172-23-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2172-22-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2172-42-0x00000000054E0000-0x00000000058EB000-memory.dmp

    Filesize

    4.0MB

  • memory/2172-46-0x00000000002B0000-0x00000000002B7000-memory.dmp

    Filesize

    28KB

  • memory/2172-45-0x00000000054E0000-0x00000000058EB000-memory.dmp

    Filesize

    4.0MB