Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-10-2024 05:29

General

  • Target

    e6047ee3e2b7715bf8aa2ed7be60c9d7.exe

  • Size

    238KB

  • MD5

    e6047ee3e2b7715bf8aa2ed7be60c9d7

  • SHA1

    8754c4ec41c424aca4e8e4d4f0dc69e0b6b08808

  • SHA256

    6622b3119c7f0e8c1228b18773cd76721c77a3fd7d871c8943974a034652b8a0

  • SHA512

    31458e228c2d778ad9eaf14fc7debec7bd00db22941d2fd5f29fa73b5f2f076210fd45db2fccd43851f0ce9ca02b77328047470dbd5258343f5e6f31211e965f

  • SSDEEP

    6144:mwDpmSK310WEb9GBW73mIX/MIos0Vdh1aQ:moppM10WSKY2IQVdz

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.

  • Creates new service(s) 2 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e6047ee3e2b7715bf8aa2ed7be60c9d7.exe
    "C:\Users\Admin\AppData\Local\Temp\e6047ee3e2b7715bf8aa2ed7be60c9d7.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4452
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ywwskhqt\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:5000
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fdsatjea.exe" C:\Windows\SysWOW64\ywwskhqt\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4920
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create ywwskhqt binPath= "C:\Windows\SysWOW64\ywwskhqt\fdsatjea.exe /d\"C:\Users\Admin\AppData\Local\Temp\e6047ee3e2b7715bf8aa2ed7be60c9d7.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1908
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description ywwskhqt "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1240
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start ywwskhqt
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3016
    • 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:4500
  • C:\Windows\SysWOW64\ywwskhqt\fdsatjea.exe
    C:\Windows\SysWOW64\ywwskhqt\fdsatjea.exe /d"C:\Users\Admin\AppData\Local\Temp\e6047ee3e2b7715bf8aa2ed7be60c9d7.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3612
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      PID:1384

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    14.3MB

    MD5

    75e50106f475dd009997f5818cadbb4a

    SHA1

    dfd59de2f1fbc50bfcd919ff46bdcca73bc844e9

    SHA256

    9b4458333dac534f86cdeadaee98f8bb365325948394120df7b54133a7675bf7

    SHA512

    9512b948f15a150af30f64743b95b71f087f46a74439f1c295243ed5567e9aaed0edfd1e5bb13c5c0ec6499ac70e705fae5c20ac7dd9a9f9b2616a0d9a160322

  • memory/1384-39-0x0000000001B30000-0x0000000001B40000-memory.dmp

    Filesize

    64KB

  • memory/1384-22-0x0000000002400000-0x000000000260F000-memory.dmp

    Filesize

    2.1MB

  • memory/1384-25-0x0000000002400000-0x000000000260F000-memory.dmp

    Filesize

    2.1MB

  • memory/1384-46-0x0000000001B30000-0x0000000001B40000-memory.dmp

    Filesize

    64KB

  • memory/1384-26-0x0000000001B20000-0x0000000001B26000-memory.dmp

    Filesize

    24KB

  • memory/1384-10-0x0000000000560000-0x0000000000575000-memory.dmp

    Filesize

    84KB

  • memory/1384-29-0x0000000001B30000-0x0000000001B40000-memory.dmp

    Filesize

    64KB

  • memory/1384-32-0x0000000001B30000-0x0000000001B40000-memory.dmp

    Filesize

    64KB

  • memory/1384-47-0x0000000001B30000-0x0000000001B40000-memory.dmp

    Filesize

    64KB

  • memory/1384-33-0x0000000001B30000-0x0000000001B40000-memory.dmp

    Filesize

    64KB

  • memory/1384-16-0x0000000000560000-0x0000000000575000-memory.dmp

    Filesize

    84KB

  • memory/1384-17-0x0000000000560000-0x0000000000575000-memory.dmp

    Filesize

    84KB

  • memory/1384-56-0x0000000007340000-0x000000000774B000-memory.dmp

    Filesize

    4.0MB

  • memory/1384-57-0x00000000029E0000-0x00000000029E7000-memory.dmp

    Filesize

    28KB

  • memory/1384-53-0x0000000007340000-0x000000000774B000-memory.dmp

    Filesize

    4.0MB

  • memory/1384-52-0x00000000029D0000-0x00000000029D5000-memory.dmp

    Filesize

    20KB

  • memory/1384-49-0x00000000029D0000-0x00000000029D5000-memory.dmp

    Filesize

    20KB

  • memory/1384-48-0x0000000001B30000-0x0000000001B40000-memory.dmp

    Filesize

    64KB

  • memory/1384-34-0x0000000001B30000-0x0000000001B40000-memory.dmp

    Filesize

    64KB

  • memory/1384-35-0x0000000001B30000-0x0000000001B40000-memory.dmp

    Filesize

    64KB

  • memory/1384-40-0x0000000001B30000-0x0000000001B40000-memory.dmp

    Filesize

    64KB

  • memory/1384-44-0x0000000001B30000-0x0000000001B40000-memory.dmp

    Filesize

    64KB

  • memory/1384-43-0x0000000001B30000-0x0000000001B40000-memory.dmp

    Filesize

    64KB

  • memory/1384-42-0x0000000001B30000-0x0000000001B40000-memory.dmp

    Filesize

    64KB

  • memory/1384-41-0x0000000001B30000-0x0000000001B40000-memory.dmp

    Filesize

    64KB

  • memory/1384-45-0x0000000001B30000-0x0000000001B40000-memory.dmp

    Filesize

    64KB

  • memory/1384-36-0x0000000001B30000-0x0000000001B40000-memory.dmp

    Filesize

    64KB

  • memory/1384-38-0x0000000001B30000-0x0000000001B40000-memory.dmp

    Filesize

    64KB

  • memory/1384-37-0x0000000001B30000-0x0000000001B40000-memory.dmp

    Filesize

    64KB

  • memory/3612-15-0x0000000000400000-0x0000000000443000-memory.dmp

    Filesize

    268KB

  • memory/3612-9-0x0000000000400000-0x0000000000443000-memory.dmp

    Filesize

    268KB

  • memory/4452-1-0x0000000000670000-0x0000000000770000-memory.dmp

    Filesize

    1024KB

  • memory/4452-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/4452-13-0x0000000000400000-0x0000000000443000-memory.dmp

    Filesize

    268KB

  • memory/4452-14-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/4452-12-0x0000000002050000-0x0000000002063000-memory.dmp

    Filesize

    76KB

  • memory/4452-8-0x0000000000670000-0x0000000000770000-memory.dmp

    Filesize

    1024KB

  • memory/4452-2-0x0000000002050000-0x0000000002063000-memory.dmp

    Filesize

    76KB