Analysis

  • max time kernel
    73s
  • max time network
    75s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    03-09-2024 07:19

General

  • Target

    aqsfwoz.exe

  • Size

    11.8MB

  • MD5

    07f1415abcdb3eb7169afb3d85d9dae5

  • SHA1

    b44b0e5a810ce27106fb31a4f955210210c53929

  • SHA256

    256663a3854aa83f75a6ead0fdf1668833e9abe83a863f09544b7a7e71764414

  • SHA512

    6bf34ded56adba5af36256039e69f0157c344b99dbb4689325b6e55c4f1172a70fda4c7adcb2c908e402f91145722207aa01551dde93121289ccb49d2c48f447

  • SSDEEP

    6144:Mw0VDy74AW/47pwSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS:Mw0VD7AW/49

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.

  • 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 5 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\aqsfwoz.exe
    "C:\Users\Admin\AppData\Local\Temp\aqsfwoz.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2052
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vjwmfumm\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1032
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vbojcjwr.exe" C:\Windows\SysWOW64\vjwmfumm\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2352
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create vjwmfumm binPath= "C:\Windows\SysWOW64\vjwmfumm\vbojcjwr.exe /d\"C:\Users\Admin\AppData\Local\Temp\aqsfwoz.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3016
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description vjwmfumm "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2620
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start vjwmfumm
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2656
    • 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:2908
  • C:\Windows\SysWOW64\vjwmfumm\vbojcjwr.exe
    C:\Windows\SysWOW64\vjwmfumm\vbojcjwr.exe /d"C:\Users\Admin\AppData\Local\Temp\aqsfwoz.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2748
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • 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:2896

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    14.6MB

    MD5

    0b6833eac88372fe36ddb7217eca8b41

    SHA1

    240c3b81c19be5b09d140bbd9a35060f4a7a7573

    SHA256

    4a5face1152fe18fd167e2f785857e0e4266997ff8d74285fa920bcb83523ca8

    SHA512

    2d60e25ba50d496b3f359deb713e2c206edbffb6bd2233729ad0bba87cb247ba5bb6a3c0f6d3a6f5bcde3b58e3c58259490c62bff14769efff6f77280069519b

  • memory/2052-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2052-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2052-8-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2052-7-0x0000000000400000-0x000000000045A000-memory.dmp

    Filesize

    360KB

  • memory/2052-1-0x0000000000560000-0x0000000000660000-memory.dmp

    Filesize

    1024KB

  • memory/2748-14-0x0000000000400000-0x000000000045A000-memory.dmp

    Filesize

    360KB

  • memory/2896-50-0x0000000005800000-0x0000000005C0B000-memory.dmp

    Filesize

    4.0MB

  • memory/2896-43-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2896-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2896-16-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2896-17-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2896-19-0x0000000001C90000-0x0000000001E9F000-memory.dmp

    Filesize

    2.1MB

  • memory/2896-26-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2896-23-0x0000000000190000-0x0000000000196000-memory.dmp

    Filesize

    24KB

  • memory/2896-22-0x0000000001C90000-0x0000000001E9F000-memory.dmp

    Filesize

    2.1MB

  • memory/2896-34-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2896-49-0x00000000001F0000-0x00000000001F5000-memory.dmp

    Filesize

    20KB

  • memory/2896-13-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2896-46-0x00000000001F0000-0x00000000001F5000-memory.dmp

    Filesize

    20KB

  • memory/2896-45-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2896-44-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2896-10-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2896-42-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2896-41-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2896-40-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2896-39-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2896-38-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2896-37-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2896-36-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2896-35-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2896-33-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2896-32-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2896-31-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2896-30-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2896-29-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2896-54-0x0000000000200000-0x0000000000207000-memory.dmp

    Filesize

    28KB

  • memory/2896-53-0x0000000005800000-0x0000000005C0B000-memory.dmp

    Filesize

    4.0MB