Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    17-09-2024 10:48

General

  • Target

    1fde6a683afa19f2133e204b30283a29.exe

  • Size

    13.4MB

  • MD5

    1fde6a683afa19f2133e204b30283a29

  • SHA1

    e9578506ce5e793261b8eb26344d9a1c99149586

  • SHA256

    05cd14dc475523a662dd0e48e5fa5060c1e31584a88cdf0150cdae15c0611c74

  • SHA512

    4511077c0e7604d190a66a2b5609eefabf5d5db1a9c00e423ee9963c0ac6a18abe10f2fc9de87fc9bfcf07b399c5a774778d275e656282eb8bc2a4e164b1f92a

  • SSDEEP

    12288:AkcLVukCo8F8JeMeMeMeMeMeMeMeMeMeMeMeMeMeMeMeMeMeMeMeMeMeMeMeMeMc:AkkYkCoD

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

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\1fde6a683afa19f2133e204b30283a29.exe
    "C:\Users\Admin\AppData\Local\Temp\1fde6a683afa19f2133e204b30283a29.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2164
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zxryuycr\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2340
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\kzjnabq.exe" C:\Windows\SysWOW64\zxryuycr\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2968
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create zxryuycr binPath= "C:\Windows\SysWOW64\zxryuycr\kzjnabq.exe /d\"C:\Users\Admin\AppData\Local\Temp\1fde6a683afa19f2133e204b30283a29.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2280
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description zxryuycr "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2748
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start zxryuycr
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2804
    • 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:2736
  • C:\Windows\SysWOW64\zxryuycr\kzjnabq.exe
    C:\Windows\SysWOW64\zxryuycr\kzjnabq.exe /d"C:\Users\Admin\AppData\Local\Temp\1fde6a683afa19f2133e204b30283a29.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2992
    • 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:2892

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    11.9MB

    MD5

    4e84dd94471986c0e4394ab1daa30b6f

    SHA1

    693281b2dccc42e72ac99fdcdd442b815ed3acd4

    SHA256

    c4b55af5d6d9a0a9d6604889f2ebdcac22417116c6d4c2e5d0c3438c67f3d717

    SHA512

    d83a9a30deb06ff665ec2ee4904f18bcf45d94992ae171ca1817733f1da58afa10781722d550262161ee388f9effe38382726d45cffa08ff3e6276830b2a8894

  • memory/2164-1-0x0000000002D90000-0x0000000002E90000-memory.dmp

    Filesize

    1024KB

  • memory/2164-2-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2164-4-0x0000000000400000-0x0000000002C6C000-memory.dmp

    Filesize

    40.4MB

  • memory/2164-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2164-7-0x0000000000400000-0x0000000002C6C000-memory.dmp

    Filesize

    40.4MB

  • memory/2892-45-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2892-42-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2892-10-0x0000000000100000-0x0000000000115000-memory.dmp

    Filesize

    84KB

  • memory/2892-16-0x0000000000100000-0x0000000000115000-memory.dmp

    Filesize

    84KB

  • memory/2892-23-0x0000000000250000-0x0000000000256000-memory.dmp

    Filesize

    24KB

  • memory/2892-17-0x0000000000100000-0x0000000000115000-memory.dmp

    Filesize

    84KB

  • memory/2892-19-0x0000000001C10000-0x0000000001E1F000-memory.dmp

    Filesize

    2.1MB

  • memory/2892-53-0x00000000057A0000-0x0000000005BAB000-memory.dmp

    Filesize

    4.0MB

  • memory/2892-54-0x00000000002F0000-0x00000000002F7000-memory.dmp

    Filesize

    28KB

  • memory/2892-50-0x00000000057A0000-0x0000000005BAB000-memory.dmp

    Filesize

    4.0MB

  • memory/2892-49-0x0000000000270000-0x0000000000275000-memory.dmp

    Filesize

    20KB

  • memory/2892-46-0x0000000000270000-0x0000000000275000-memory.dmp

    Filesize

    20KB

  • memory/2892-13-0x0000000000100000-0x0000000000115000-memory.dmp

    Filesize

    84KB

  • memory/2892-44-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2892-43-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2892-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2892-41-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2892-40-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2892-39-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2892-38-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2892-37-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2892-36-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2892-35-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2892-34-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2892-33-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2892-32-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2892-31-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2892-30-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2892-29-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2892-22-0x0000000001C10000-0x0000000001E1F000-memory.dmp

    Filesize

    2.1MB

  • memory/2892-26-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2992-15-0x0000000000400000-0x0000000002C6C000-memory.dmp

    Filesize

    40.4MB