Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
  • submitted
    04/09/2024, 13:48

General

  • Target

    5df0c9e0e30e449d746c096a467d5217396a79a877be2081b7876af2a072fece.exe

  • Size

    191KB

  • MD5

    a8343b36fd866f4ec73184a55aebf791

  • SHA1

    9420445ca0f80f0714978bb158c10772a9eb8ec6

  • SHA256

    5df0c9e0e30e449d746c096a467d5217396a79a877be2081b7876af2a072fece

  • SHA512

    9081eb71127efc7dcaf1ba09d0390f71d344533c31c9c259cf495bc7c49c8609c25e4d54612a5becf5267494d035fee5d1e6f7e7a2552bee572f30ac6b4dc515

  • SSDEEP

    3072:7H+lBBpz9/vh9yxrVjljF5xFqeReI7pCpKeJNUWyqpvD3hyNQFFyb1:6Bpz9/vh9yxpBjFzzoK4WWJ9D3IGO

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\5df0c9e0e30e449d746c096a467d5217396a79a877be2081b7876af2a072fece.exe
    "C:\Users\Admin\AppData\Local\Temp\5df0c9e0e30e449d746c096a467d5217396a79a877be2081b7876af2a072fece.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2264
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qiewtuvn\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2712
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ykanbasw.exe" C:\Windows\SysWOW64\qiewtuvn\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2856
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create qiewtuvn binPath= "C:\Windows\SysWOW64\qiewtuvn\ykanbasw.exe /d\"C:\Users\Admin\AppData\Local\Temp\5df0c9e0e30e449d746c096a467d5217396a79a877be2081b7876af2a072fece.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3044
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description qiewtuvn "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2708
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start qiewtuvn
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3020
    • 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:2656
  • C:\Windows\SysWOW64\qiewtuvn\ykanbasw.exe
    C:\Windows\SysWOW64\qiewtuvn\ykanbasw.exe /d"C:\Users\Admin\AppData\Local\Temp\5df0c9e0e30e449d746c096a467d5217396a79a877be2081b7876af2a072fece.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2764
    • 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:2784

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    10.0MB

    MD5

    c926d627b03a7e815176ff791a549efa

    SHA1

    6c6f08e1c8330e7fe20d5c9f01f5792affef6985

    SHA256

    0168e58e1f991e0247220e8f8327c7e15b539c8a306d7a345dbe73fcfbd7feb0

    SHA512

    7359da01132d4cc6c26f08a7416025b2abb30ee547105591484c456734c9ca9437f86b5e63587b8eee042263297244b1786f281362c71b9bcb7eaeba506adc73

  • memory/2264-14-0x0000000000400000-0x0000000000437000-memory.dmp

    Filesize

    220KB

  • memory/2264-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2264-4-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2264-1-0x0000000000610000-0x0000000000710000-memory.dmp

    Filesize

    1024KB

  • memory/2264-15-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2264-16-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2764-13-0x0000000000400000-0x0000000000437000-memory.dmp

    Filesize

    220KB

  • memory/2784-30-0x0000000000180000-0x0000000000190000-memory.dmp

    Filesize

    64KB

  • memory/2784-47-0x00000000001D0000-0x00000000001D5000-memory.dmp

    Filesize

    20KB

  • memory/2784-11-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

  • memory/2784-17-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

  • memory/2784-18-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

  • memory/2784-24-0x00000000000F0000-0x00000000000F6000-memory.dmp

    Filesize

    24KB

  • memory/2784-27-0x0000000000180000-0x0000000000190000-memory.dmp

    Filesize

    64KB

  • memory/2784-23-0x00000000019B0000-0x0000000001BBF000-memory.dmp

    Filesize

    2.1MB

  • memory/2784-20-0x00000000019B0000-0x0000000001BBF000-memory.dmp

    Filesize

    2.1MB

  • memory/2784-31-0x0000000000180000-0x0000000000190000-memory.dmp

    Filesize

    64KB

  • memory/2784-8-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

  • memory/2784-55-0x0000000000220000-0x0000000000227000-memory.dmp

    Filesize

    28KB

  • memory/2784-54-0x00000000054B0000-0x00000000058BB000-memory.dmp

    Filesize

    4.0MB

  • memory/2784-51-0x00000000054B0000-0x00000000058BB000-memory.dmp

    Filesize

    4.0MB

  • memory/2784-50-0x00000000001D0000-0x00000000001D5000-memory.dmp

    Filesize

    20KB

  • memory/2784-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2784-46-0x0000000000180000-0x0000000000190000-memory.dmp

    Filesize

    64KB

  • memory/2784-45-0x0000000000180000-0x0000000000190000-memory.dmp

    Filesize

    64KB

  • memory/2784-44-0x0000000000180000-0x0000000000190000-memory.dmp

    Filesize

    64KB

  • memory/2784-43-0x0000000000180000-0x0000000000190000-memory.dmp

    Filesize

    64KB

  • memory/2784-42-0x0000000000180000-0x0000000000190000-memory.dmp

    Filesize

    64KB

  • memory/2784-41-0x0000000000180000-0x0000000000190000-memory.dmp

    Filesize

    64KB

  • memory/2784-40-0x0000000000180000-0x0000000000190000-memory.dmp

    Filesize

    64KB

  • memory/2784-39-0x0000000000180000-0x0000000000190000-memory.dmp

    Filesize

    64KB

  • memory/2784-38-0x0000000000180000-0x0000000000190000-memory.dmp

    Filesize

    64KB

  • memory/2784-37-0x0000000000180000-0x0000000000190000-memory.dmp

    Filesize

    64KB

  • memory/2784-36-0x0000000000180000-0x0000000000190000-memory.dmp

    Filesize

    64KB

  • memory/2784-35-0x0000000000180000-0x0000000000190000-memory.dmp

    Filesize

    64KB

  • memory/2784-34-0x0000000000180000-0x0000000000190000-memory.dmp

    Filesize

    64KB

  • memory/2784-33-0x0000000000180000-0x0000000000190000-memory.dmp

    Filesize

    64KB

  • memory/2784-32-0x0000000000180000-0x0000000000190000-memory.dmp

    Filesize

    64KB