Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    05-09-2024 09:46

General

  • Target

    2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2.exe

  • Size

    423KB

  • MD5

    b2e864c2f8f6e243822a5c133bb41061

  • SHA1

    5571df4cdc5b65cdc315c95ee52344dda7f12b20

  • SHA256

    2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2

  • SHA512

    32a6087702abe92daab3e2c194b07006f5b9d3cdf48c692d23775f0d75e2941882920767148564ac7fedc417beadb1ae75734f240d07bec30eb262ae4f534e73

  • SSDEEP

    6144:qc6OZDisWsD0Td2HJxO+m8PuG1R4WnWjrsaz:q1OZDisvwdaxO0PuG1R4CWs

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\2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2.exe
    "C:\Users\Admin\AppData\Local\Temp\2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2512
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\drukgtut\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1500
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vcfazttn.exe" C:\Windows\SysWOW64\drukgtut\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1972
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create drukgtut binPath= "C:\Windows\SysWOW64\drukgtut\vcfazttn.exe /d\"C:\Users\Admin\AppData\Local\Temp\2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2160
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description drukgtut "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2748
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start drukgtut
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2688
    • 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:2888
  • C:\Windows\SysWOW64\drukgtut\vcfazttn.exe
    C:\Windows\SysWOW64\drukgtut\vcfazttn.exe /d"C:\Users\Admin\AppData\Local\Temp\2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2668
    • 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:2808

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    11.9MB

    MD5

    57a370a3c9d8153daaf354c2a93e807f

    SHA1

    725692cc0351419495c2795b99e1a94c94299361

    SHA256

    2630ac035e1ff15ff73702b3bf372cfc5af2eae5b5c2b833f076df98cb6ab4a4

    SHA512

    f6e54d2dc29a40d2ba5c8d789e083f824c10acdc5be271bc054627dbfe786f73bc553a53481c427c515acef9a665d257e83a7040811231939db999b78b9ca93c

  • memory/2512-1-0x0000000000A40000-0x0000000000B40000-memory.dmp

    Filesize

    1024KB

  • memory/2512-4-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/2512-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2512-8-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/2512-2-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2668-17-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/2808-55-0x00000000001D0000-0x00000000001D7000-memory.dmp

    Filesize

    28KB

  • memory/2808-47-0x00000000001C0000-0x00000000001C5000-memory.dmp

    Filesize

    20KB

  • memory/2808-16-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2808-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2808-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2808-20-0x0000000001B20000-0x0000000001D2F000-memory.dmp

    Filesize

    2.1MB

  • memory/2808-27-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

  • memory/2808-24-0x00000000000F0000-0x00000000000F6000-memory.dmp

    Filesize

    24KB

  • memory/2808-23-0x0000000001B20000-0x0000000001D2F000-memory.dmp

    Filesize

    2.1MB

  • memory/2808-30-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

  • memory/2808-31-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

  • memory/2808-14-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2808-54-0x0000000005600000-0x0000000005A0B000-memory.dmp

    Filesize

    4.0MB

  • memory/2808-51-0x0000000005600000-0x0000000005A0B000-memory.dmp

    Filesize

    4.0MB

  • memory/2808-50-0x00000000001C0000-0x00000000001C5000-memory.dmp

    Filesize

    20KB

  • memory/2808-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2808-46-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

  • memory/2808-45-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

  • memory/2808-44-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

  • memory/2808-43-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

  • memory/2808-42-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

  • memory/2808-41-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

  • memory/2808-40-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

  • memory/2808-39-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

  • memory/2808-38-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

  • memory/2808-37-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

  • memory/2808-36-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

  • memory/2808-35-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

  • memory/2808-34-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

  • memory/2808-33-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB

  • memory/2808-32-0x0000000000100000-0x0000000000110000-memory.dmp

    Filesize

    64KB