Analysis

  • max time kernel
    149s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    21-09-2024 16:55

General

  • Target

    27ca44d4fca5a29c0018efeebbda04250739a546e4b7879bd5a547aaea1de80d.exe

  • Size

    415KB

  • MD5

    1c5083792acfccf5d90db80884569ace

  • SHA1

    6be243663a2d173dcd728146f2a3d1a5a974ff38

  • SHA256

    27ca44d4fca5a29c0018efeebbda04250739a546e4b7879bd5a547aaea1de80d

  • SHA512

    8af309adcaed0055ca8b2c879a1ff16e9d0d853ab3837c94719d09c03bf27b32125581f525ef99caa4488b184bfc5565b033333cd4af9e4240aa23963dd76a1b

  • SSDEEP

    6144:+nhYTBI6ONsWWqOaejSlD8viNV43Km3Wlz8+5FXCnFk:2aTy6OlO3GDyYnSC

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\27ca44d4fca5a29c0018efeebbda04250739a546e4b7879bd5a547aaea1de80d.exe
    "C:\Users\Admin\AppData\Local\Temp\27ca44d4fca5a29c0018efeebbda04250739a546e4b7879bd5a547aaea1de80d.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2276
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yxhqlzqv\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1664
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zgnqftmw.exe" C:\Windows\SysWOW64\yxhqlzqv\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2256
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create yxhqlzqv binPath= "C:\Windows\SysWOW64\yxhqlzqv\zgnqftmw.exe /d\"C:\Users\Admin\AppData\Local\Temp\27ca44d4fca5a29c0018efeebbda04250739a546e4b7879bd5a547aaea1de80d.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1980
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description yxhqlzqv "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2984
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start yxhqlzqv
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1884
    • 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:2640
  • C:\Windows\SysWOW64\yxhqlzqv\zgnqftmw.exe
    C:\Windows\SysWOW64\yxhqlzqv\zgnqftmw.exe /d"C:\Users\Admin\AppData\Local\Temp\27ca44d4fca5a29c0018efeebbda04250739a546e4b7879bd5a547aaea1de80d.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2236
    • 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:2396

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    12.2MB

    MD5

    71359947798278b71897d17217b62b19

    SHA1

    ca226a5c7c4f801d0009cbaf08481849ef184123

    SHA256

    9c9641bfb699f177abed8d4204b7d432e01e39775f0887c20829bdb8375d0985

    SHA512

    52a9028b80f45a53339883f70c34a3c067a3b46fcd53668b82840cf6f923c825874ab41dd06966dc39f111f8746c2a2217c60ef8d18877fe2dff89a31601daa5

  • memory/2236-12-0x0000000000400000-0x000000000247F000-memory.dmp

    Filesize

    32.5MB

  • memory/2276-16-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2276-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2276-1-0x0000000002530000-0x0000000002630000-memory.dmp

    Filesize

    1024KB

  • memory/2276-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2276-15-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2276-14-0x0000000000400000-0x000000000247F000-memory.dmp

    Filesize

    32.5MB

  • memory/2396-55-0x0000000000360000-0x0000000000367000-memory.dmp

    Filesize

    28KB

  • memory/2396-44-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2396-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2396-17-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2396-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2396-20-0x00000000018D0000-0x0000000001ADF000-memory.dmp

    Filesize

    2.1MB

  • memory/2396-37-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2396-36-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2396-50-0x00000000001C0000-0x00000000001C5000-memory.dmp

    Filesize

    20KB

  • memory/2396-51-0x00000000053B0000-0x00000000057BB000-memory.dmp

    Filesize

    4.0MB

  • memory/2396-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2396-47-0x00000000001C0000-0x00000000001C5000-memory.dmp

    Filesize

    20KB

  • memory/2396-54-0x00000000053B0000-0x00000000057BB000-memory.dmp

    Filesize

    4.0MB

  • memory/2396-46-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2396-45-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2396-8-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2396-43-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2396-42-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2396-41-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2396-40-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2396-39-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2396-38-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2396-35-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2396-34-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2396-33-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2396-32-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2396-31-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2396-30-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2396-27-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2396-24-0x0000000000150000-0x0000000000156000-memory.dmp

    Filesize

    24KB

  • memory/2396-23-0x00000000018D0000-0x0000000001ADF000-memory.dmp

    Filesize

    2.1MB