Analysis

  • max time kernel
    149s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    21-12-2024 17:44

General

  • Target

    cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe

  • Size

    167KB

  • MD5

    c2dd5c2437c8dfee1e944b43354c2345

  • SHA1

    6b4275b19ac0d4c976beee7b774ffe304376da8f

  • SHA256

    cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c

  • SHA512

    892e044aa9fa4b29912c70a927cb6d72f952c333662cc22a08649aa1f639be53f54ab4409a2f5305ce8651ff2c7503609542748c8b9960a1260e505664070e36

  • SSDEEP

    3072:HWt4tFAaLDnwOa8aCj9LRnj1A752+HoALd1HHX:2ALDwB8awTnj3+HoiP

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.info

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Tofsee family
  • 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
  • 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.

  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe
    "C:\Users\Admin\AppData\Local\Temp\cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2996
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\cswgkrzv\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2740
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\iclvilqc.exe" C:\Windows\SysWOW64\cswgkrzv\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2912
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create cswgkrzv binPath= "C:\Windows\SysWOW64\cswgkrzv\iclvilqc.exe /d\"C:\Users\Admin\AppData\Local\Temp\cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2656
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description cswgkrzv "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2820
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start cswgkrzv
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2332
    • 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:2516
  • C:\Windows\SysWOW64\cswgkrzv\iclvilqc.exe
    C:\Windows\SysWOW64\cswgkrzv\iclvilqc.exe /d"C:\Users\Admin\AppData\Local\Temp\cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2596
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Windows security bypass
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:2496

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    13.1MB

    MD5

    97dfce62c3b72c03be57883b1ef9007c

    SHA1

    2b640bc7f0f3914d4c2f2222693f31e468b6b461

    SHA256

    768edff7fbe238680d522cbfa99a7582713527674950582882bebc9fd276d210

    SHA512

    c87bdcea7c1b03064ced5fd11ba2a151a0db980522628540c46544445e803f4ab9e7acb5ced87e50d661e5a5b17da3ae1f5abe93d4675972ad88d6831c9991df

  • memory/2496-11-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

  • memory/2496-16-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

  • memory/2496-14-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

  • memory/2496-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2496-18-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

  • memory/2596-17-0x0000000000400000-0x00000000004B0000-memory.dmp

    Filesize

    704KB

  • memory/2996-1-0x0000000000630000-0x0000000000730000-memory.dmp

    Filesize

    1024KB

  • memory/2996-3-0x0000000000400000-0x00000000004B0000-memory.dmp

    Filesize

    704KB

  • memory/2996-2-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2996-10-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2996-9-0x0000000000400000-0x00000000004B0000-memory.dmp

    Filesize

    704KB