Analysis

  • max time kernel
    143s
  • max time network
    141s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    17-09-2024 10:54

General

  • Target

    c12c0818b3943d544dde026c24b31163.exe

  • Size

    12.2MB

  • MD5

    c12c0818b3943d544dde026c24b31163

  • SHA1

    846bb3c582a475ceca650dc0cb7b21e1c0a46faf

  • SHA256

    fda2cf0c4eabc5b1a0dfb821ea8605b71d190b2e46f9c13fe17a344357c0fd87

  • SHA512

    90093573f77c50742763fcbe7ad2a71e72ba726e3cf6e4e7513773d2189ba14654163218d29847d81e166888d517864330b04201516073e88aa37581837a27db

  • SSDEEP

    12288:jtfqkWH3ZIQqcggggggggggggggggggggggggggggggggggggggggggggggggggM:jY1HpLq

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.

  • 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\c12c0818b3943d544dde026c24b31163.exe
    "C:\Users\Admin\AppData\Local\Temp\c12c0818b3943d544dde026c24b31163.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1780
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\eeuazjvs\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2564
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\aqbfrzfo.exe" C:\Windows\SysWOW64\eeuazjvs\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2816
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create eeuazjvs binPath= "C:\Windows\SysWOW64\eeuazjvs\aqbfrzfo.exe /d\"C:\Users\Admin\AppData\Local\Temp\c12c0818b3943d544dde026c24b31163.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2644
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description eeuazjvs "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2980
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start eeuazjvs
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2624
    • 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:2556
  • C:\Windows\SysWOW64\eeuazjvs\aqbfrzfo.exe
    C:\Windows\SysWOW64\eeuazjvs\aqbfrzfo.exe /d"C:\Users\Admin\AppData\Local\Temp\c12c0818b3943d544dde026c24b31163.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2216
    • 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:2480

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    14.3MB

    MD5

    79fa4471ba1cae41aebe977fc6ae3507

    SHA1

    7ee7ea45eeebe8870efecb54f379e1bd3a9ab16d

    SHA256

    1a6e28f1ea780c0d60dbd6c7316ddb8678820f5d92ce453d263e923f2e4c589a

    SHA512

    dd8b136a264bafa1dea840ebb61321caf9d3440e1588c21d4fc0ac84b9f582993cffbe07103d4cfbb2c9ed4ad85440d9ef6098f3c4cd213d98966495107013ae

  • memory/1780-2-0x00000000003A0000-0x00000000003B3000-memory.dmp

    Filesize

    76KB

  • memory/1780-4-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1780-8-0x00000000003A0000-0x00000000003B3000-memory.dmp

    Filesize

    76KB

  • memory/1780-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1780-7-0x0000000000400000-0x0000000002C6C000-memory.dmp

    Filesize

    40.4MB

  • memory/1780-1-0x0000000000230000-0x0000000000330000-memory.dmp

    Filesize

    1024KB

  • memory/2216-17-0x0000000000400000-0x0000000002C6C000-memory.dmp

    Filesize

    40.4MB

  • memory/2480-47-0x0000000000140000-0x0000000000145000-memory.dmp

    Filesize

    20KB

  • memory/2480-42-0x0000000000130000-0x0000000000140000-memory.dmp

    Filesize

    64KB

  • memory/2480-16-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2480-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2480-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2480-24-0x0000000000120000-0x0000000000126000-memory.dmp

    Filesize

    24KB

  • memory/2480-27-0x0000000000130000-0x0000000000140000-memory.dmp

    Filesize

    64KB

  • memory/2480-23-0x0000000001DD0000-0x0000000001FDF000-memory.dmp

    Filesize

    2.1MB

  • memory/2480-20-0x0000000001DD0000-0x0000000001FDF000-memory.dmp

    Filesize

    2.1MB

  • memory/2480-50-0x0000000000140000-0x0000000000145000-memory.dmp

    Filesize

    20KB

  • memory/2480-14-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2480-46-0x0000000000130000-0x0000000000140000-memory.dmp

    Filesize

    64KB

  • memory/2480-45-0x0000000000130000-0x0000000000140000-memory.dmp

    Filesize

    64KB

  • memory/2480-44-0x0000000000130000-0x0000000000140000-memory.dmp

    Filesize

    64KB

  • memory/2480-43-0x0000000000130000-0x0000000000140000-memory.dmp

    Filesize

    64KB

  • memory/2480-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2480-41-0x0000000000130000-0x0000000000140000-memory.dmp

    Filesize

    64KB

  • memory/2480-40-0x0000000000130000-0x0000000000140000-memory.dmp

    Filesize

    64KB

  • memory/2480-39-0x0000000000130000-0x0000000000140000-memory.dmp

    Filesize

    64KB

  • memory/2480-38-0x0000000000130000-0x0000000000140000-memory.dmp

    Filesize

    64KB

  • memory/2480-37-0x0000000000130000-0x0000000000140000-memory.dmp

    Filesize

    64KB

  • memory/2480-36-0x0000000000130000-0x0000000000140000-memory.dmp

    Filesize

    64KB

  • memory/2480-35-0x0000000000130000-0x0000000000140000-memory.dmp

    Filesize

    64KB

  • memory/2480-34-0x0000000000130000-0x0000000000140000-memory.dmp

    Filesize

    64KB

  • memory/2480-33-0x0000000000130000-0x0000000000140000-memory.dmp

    Filesize

    64KB

  • memory/2480-32-0x0000000000130000-0x0000000000140000-memory.dmp

    Filesize

    64KB

  • memory/2480-31-0x0000000000130000-0x0000000000140000-memory.dmp

    Filesize

    64KB

  • memory/2480-30-0x0000000000130000-0x0000000000140000-memory.dmp

    Filesize

    64KB

  • memory/2480-54-0x00000000057B0000-0x0000000005BBB000-memory.dmp

    Filesize

    4.0MB

  • memory/2480-51-0x00000000057B0000-0x0000000005BBB000-memory.dmp

    Filesize

    4.0MB

  • memory/2480-55-0x00000000001D0000-0x00000000001D7000-memory.dmp

    Filesize

    28KB