Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    03/09/2024, 17:42

General

  • Target

    57f6dbc4d6b680cfc1efb711e71be666540572c77e93555a246239227d463367.exe

  • Size

    414KB

  • MD5

    2b67e390e0b1d03d9b6e99d0271b8883

  • SHA1

    3c5dbe4222c43bbb6c8065142eb660a9c07af33e

  • SHA256

    57f6dbc4d6b680cfc1efb711e71be666540572c77e93555a246239227d463367

  • SHA512

    c040572536f174f22dd20308c754ee81fdb5fafe99f555575227113e7fdb67462eba5ecadbf645c2f6f6798b15d64b7950774d3d2340db76c06764210c26576b

  • SSDEEP

    3072:DaX5P74gWHs72AQo6ssNJb1SyLhzmqSWCXwwQS7tbdi2lA7MJZ4899kbKn4yixxb:W5jpWHs720fO0ysHR02lAMp9iK4dMt

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 6 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\57f6dbc4d6b680cfc1efb711e71be666540572c77e93555a246239227d463367.exe
    "C:\Users\Admin\AppData\Local\Temp\57f6dbc4d6b680cfc1efb711e71be666540572c77e93555a246239227d463367.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2508
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ddakqjf\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1800
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ileppyzz.exe" C:\Windows\SysWOW64\ddakqjf\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2240
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create ddakqjf binPath= "C:\Windows\SysWOW64\ddakqjf\ileppyzz.exe /d\"C:\Users\Admin\AppData\Local\Temp\57f6dbc4d6b680cfc1efb711e71be666540572c77e93555a246239227d463367.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1124
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description ddakqjf "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2988
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start ddakqjf
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3056
    • 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:2860
  • C:\Windows\SysWOW64\ddakqjf\ileppyzz.exe
    C:\Windows\SysWOW64\ddakqjf\ileppyzz.exe /d"C:\Users\Admin\AppData\Local\Temp\57f6dbc4d6b680cfc1efb711e71be666540572c77e93555a246239227d463367.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:2760

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    13.0MB

    MD5

    00fd1999521cef77e8efbd80dc285508

    SHA1

    27657fe4987248dfe2562726b2205b87da738ba4

    SHA256

    eb96bd96c44465514926b044c6e1d6820dbc4620defc0df49a81e12bc1281c16

    SHA512

    831eb3e00b1c34d76b109080cc7c2ecd5acc56eceebd965e4f37d105b93b4d8c8d230a4d208e686ff602a651b0c6686550e049ad1bb4cbf830adb59c9d30da4c

  • memory/2508-15-0x0000000000240000-0x0000000000253000-memory.dmp

    Filesize

    76KB

  • memory/2508-2-0x0000000000240000-0x0000000000253000-memory.dmp

    Filesize

    76KB

  • memory/2508-4-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2508-1-0x0000000000790000-0x0000000000890000-memory.dmp

    Filesize

    1024KB

  • memory/2508-16-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2508-14-0x0000000000400000-0x00000000005FB000-memory.dmp

    Filesize

    2.0MB

  • memory/2760-47-0x00000000001B0000-0x00000000001B5000-memory.dmp

    Filesize

    20KB

  • memory/2760-43-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2760-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2760-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2760-17-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2760-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2760-20-0x0000000001960000-0x0000000001B6F000-memory.dmp

    Filesize

    2.1MB

  • memory/2760-27-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2760-24-0x0000000000110000-0x0000000000116000-memory.dmp

    Filesize

    24KB

  • memory/2760-23-0x0000000001960000-0x0000000001B6F000-memory.dmp

    Filesize

    2.1MB

  • memory/2760-50-0x00000000001B0000-0x00000000001B5000-memory.dmp

    Filesize

    20KB

  • memory/2760-8-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2760-46-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2760-45-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2760-44-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2760-55-0x0000000000200000-0x0000000000207000-memory.dmp

    Filesize

    28KB

  • memory/2760-42-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2760-41-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2760-40-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2760-39-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2760-38-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2760-37-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2760-36-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2760-35-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2760-34-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2760-33-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2760-32-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2760-31-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2760-30-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2760-51-0x00000000054C0000-0x00000000058CB000-memory.dmp

    Filesize

    4.0MB

  • memory/2760-54-0x00000000054C0000-0x00000000058CB000-memory.dmp

    Filesize

    4.0MB

  • memory/2764-12-0x0000000000400000-0x00000000005FB000-memory.dmp

    Filesize

    2.0MB