Analysis

  • max time kernel
    149s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    22-11-2024 17:19

General

  • Target

    6ab57929c7fb967824f95db9980c8b85cc6f112e2037b78d7e11e1760ee9870f.exe

  • Size

    172KB

  • MD5

    c795a6ac03536cab09f978bc5791a9b6

  • SHA1

    3e44e52011285caf407bf1a50175699cd4f3d673

  • SHA256

    6ab57929c7fb967824f95db9980c8b85cc6f112e2037b78d7e11e1760ee9870f

  • SHA512

    173fbfd25d69b2e2b5f2a8d7d814278a439d13ec6ec6c93a1b662126dd23295105eff9f05d1438f95863caa328a28a977a9aa85c68c09256e5a0b392e0adf2eb

  • SSDEEP

    3072:HTLTWx01rYIM9Nhrqzn150fkTCUuhGgrBXETBS:zLTz8ICNDfzUcGS

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.

  • 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
  • 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\6ab57929c7fb967824f95db9980c8b85cc6f112e2037b78d7e11e1760ee9870f.exe
    "C:\Users\Admin\AppData\Local\Temp\6ab57929c7fb967824f95db9980c8b85cc6f112e2037b78d7e11e1760ee9870f.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3044
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qdjiczxm\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2072
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\frdiflky.exe" C:\Windows\SysWOW64\qdjiczxm\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2500
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create qdjiczxm binPath= "C:\Windows\SysWOW64\qdjiczxm\frdiflky.exe /d\"C:\Users\Admin\AppData\Local\Temp\6ab57929c7fb967824f95db9980c8b85cc6f112e2037b78d7e11e1760ee9870f.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2844
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description qdjiczxm "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2764
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start qdjiczxm
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2124
    • 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\qdjiczxm\frdiflky.exe
    C:\Windows\SysWOW64\qdjiczxm\frdiflky.exe /d"C:\Users\Admin\AppData\Local\Temp\6ab57929c7fb967824f95db9980c8b85cc6f112e2037b78d7e11e1760ee9870f.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2648
    • 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:2616

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    11.4MB

    MD5

    ffb282362b048f590f8705a7fd2398e0

    SHA1

    e05c1c9640fa8492365e92f1c5fece7e556dae7f

    SHA256

    7b006c6bc30e389fc8407463b7c8b02615156a459b93e04b9f0f75c337970bd9

    SHA512

    a766eab11614867b2e89e2c5b04954247590eb150c636eb76aa07bef120cc2aa6fed9c47007eb117dc70df215934b110f65de9f90eccd1e77e8e2cc067666290

  • memory/2616-30-0x00000000001D0000-0x00000000001E0000-memory.dmp

    Filesize

    64KB

  • memory/2616-36-0x00000000001D0000-0x00000000001E0000-memory.dmp

    Filesize

    64KB

  • memory/2616-35-0x00000000001D0000-0x00000000001E0000-memory.dmp

    Filesize

    64KB

  • memory/2616-34-0x00000000001D0000-0x00000000001E0000-memory.dmp

    Filesize

    64KB

  • memory/2616-44-0x00000000001D0000-0x00000000001E0000-memory.dmp

    Filesize

    64KB

  • memory/2616-16-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2616-14-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2616-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2616-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2616-37-0x00000000001D0000-0x00000000001E0000-memory.dmp

    Filesize

    64KB

  • memory/2616-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2616-20-0x0000000001890000-0x0000000001A9F000-memory.dmp

    Filesize

    2.1MB

  • memory/2616-27-0x00000000001D0000-0x00000000001E0000-memory.dmp

    Filesize

    64KB

  • memory/2616-24-0x00000000001B0000-0x00000000001B6000-memory.dmp

    Filesize

    24KB

  • memory/2616-23-0x0000000001890000-0x0000000001A9F000-memory.dmp

    Filesize

    2.1MB

  • memory/2616-32-0x00000000001D0000-0x00000000001E0000-memory.dmp

    Filesize

    64KB

  • memory/2616-31-0x00000000001D0000-0x00000000001E0000-memory.dmp

    Filesize

    64KB

  • memory/2616-38-0x00000000001D0000-0x00000000001E0000-memory.dmp

    Filesize

    64KB

  • memory/2616-39-0x00000000001D0000-0x00000000001E0000-memory.dmp

    Filesize

    64KB

  • memory/2616-40-0x00000000001D0000-0x00000000001E0000-memory.dmp

    Filesize

    64KB

  • memory/2616-55-0x00000000001F0000-0x00000000001F7000-memory.dmp

    Filesize

    28KB

  • memory/2616-33-0x00000000001D0000-0x00000000001E0000-memory.dmp

    Filesize

    64KB

  • memory/2616-54-0x0000000005460000-0x000000000586B000-memory.dmp

    Filesize

    4.0MB

  • memory/2616-51-0x0000000005460000-0x000000000586B000-memory.dmp

    Filesize

    4.0MB

  • memory/2616-50-0x00000000001E0000-0x00000000001E5000-memory.dmp

    Filesize

    20KB

  • memory/2616-47-0x00000000001E0000-0x00000000001E5000-memory.dmp

    Filesize

    20KB

  • memory/2616-46-0x00000000001D0000-0x00000000001E0000-memory.dmp

    Filesize

    64KB

  • memory/2616-45-0x00000000001D0000-0x00000000001E0000-memory.dmp

    Filesize

    64KB

  • memory/2616-43-0x00000000001D0000-0x00000000001E0000-memory.dmp

    Filesize

    64KB

  • memory/2616-42-0x00000000001D0000-0x00000000001E0000-memory.dmp

    Filesize

    64KB

  • memory/2616-41-0x00000000001D0000-0x00000000001E0000-memory.dmp

    Filesize

    64KB

  • memory/2648-17-0x0000000000400000-0x000000000043F000-memory.dmp

    Filesize

    252KB

  • memory/3044-2-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/3044-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/3044-1-0x0000000000230000-0x0000000000330000-memory.dmp

    Filesize

    1024KB

  • memory/3044-8-0x0000000000400000-0x000000000043F000-memory.dmp

    Filesize

    252KB

  • memory/3044-3-0x0000000000400000-0x000000000043F000-memory.dmp

    Filesize

    252KB