Analysis

  • max time kernel
    147s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-09-2024 20:03

General

  • Target

    1b2c0acd5d2ba3645ad133e9a9ca7794343557c590225a1a400d8fcfe3bdf9cc.exe

  • Size

    213KB

  • MD5

    f9ad5be234e6344809c7ff448e159a7d

  • SHA1

    0415a25b3d0a26fdc3f860abbbc1ffc02524aed4

  • SHA256

    1b2c0acd5d2ba3645ad133e9a9ca7794343557c590225a1a400d8fcfe3bdf9cc

  • SHA512

    aefd78cd2dfe9bb61fa08cf80959b83ce8c14dcb6ff9230b8386b1e04965bec63bb4c4b5c2446990e3d6ec10963255b4bc34e280af22cc27bee653365f0cb3c5

  • SSDEEP

    3072:0ASCGfSRnbJBJyvE3gCD5aYTGnfH7g9aHlfwR+9pbQ:wfSRnbJBJywgFYTutoRE

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.

  • 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 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1b2c0acd5d2ba3645ad133e9a9ca7794343557c590225a1a400d8fcfe3bdf9cc.exe
    "C:\Users\Admin\AppData\Local\Temp\1b2c0acd5d2ba3645ad133e9a9ca7794343557c590225a1a400d8fcfe3bdf9cc.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3580
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qfjgmtcd\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2744
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hbgezczb.exe" C:\Windows\SysWOW64\qfjgmtcd\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:640
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create qfjgmtcd binPath= "C:\Windows\SysWOW64\qfjgmtcd\hbgezczb.exe /d\"C:\Users\Admin\AppData\Local\Temp\1b2c0acd5d2ba3645ad133e9a9ca7794343557c590225a1a400d8fcfe3bdf9cc.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3888
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description qfjgmtcd "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3424
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start qfjgmtcd
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:932
    • 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:5024
  • C:\Windows\SysWOW64\qfjgmtcd\hbgezczb.exe
    C:\Windows\SysWOW64\qfjgmtcd\hbgezczb.exe /d"C:\Users\Admin\AppData\Local\Temp\1b2c0acd5d2ba3645ad133e9a9ca7794343557c590225a1a400d8fcfe3bdf9cc.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4920
    • 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:1308

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    12.5MB

    MD5

    d517f69834d8574999d40c1fa4ce6a94

    SHA1

    b868e4bc883f36c28f58c8743e637ea7e5611d62

    SHA256

    447f87084ede96d61d0764da96d07a553625a61e4a0bbc6d5c47fbb64bc26be9

    SHA512

    3a39c57c68cc5f907cd79ef560a1335a775a81fb87f530242fb5ba9ac0305c77bb8e2467e23a670f4573d1aa45c553ef70db47c184203d3b72c0107c4f0c3247

  • memory/1308-45-0x0000000002750000-0x0000000002760000-memory.dmp

    Filesize

    64KB

  • memory/1308-37-0x0000000002750000-0x0000000002760000-memory.dmp

    Filesize

    64KB

  • memory/1308-22-0x0000000002400000-0x000000000260F000-memory.dmp

    Filesize

    2.1MB

  • memory/1308-46-0x0000000002750000-0x0000000002760000-memory.dmp

    Filesize

    64KB

  • memory/1308-25-0x0000000001BF0000-0x0000000001BF6000-memory.dmp

    Filesize

    24KB

  • memory/1308-28-0x0000000002750000-0x0000000002760000-memory.dmp

    Filesize

    64KB

  • memory/1308-31-0x0000000002750000-0x0000000002760000-memory.dmp

    Filesize

    64KB

  • memory/1308-33-0x0000000002750000-0x0000000002760000-memory.dmp

    Filesize

    64KB

  • memory/1308-34-0x0000000002750000-0x0000000002760000-memory.dmp

    Filesize

    64KB

  • memory/1308-14-0x0000000000880000-0x0000000000895000-memory.dmp

    Filesize

    84KB

  • memory/1308-35-0x0000000002750000-0x0000000002760000-memory.dmp

    Filesize

    64KB

  • memory/1308-18-0x0000000000880000-0x0000000000895000-memory.dmp

    Filesize

    84KB

  • memory/1308-19-0x0000000000880000-0x0000000000895000-memory.dmp

    Filesize

    84KB

  • memory/1308-44-0x0000000002750000-0x0000000002760000-memory.dmp

    Filesize

    64KB

  • memory/1308-52-0x0000000007440000-0x000000000784B000-memory.dmp

    Filesize

    4.0MB

  • memory/1308-56-0x00000000029F0000-0x00000000029F7000-memory.dmp

    Filesize

    28KB

  • memory/1308-51-0x00000000029E0000-0x00000000029E5000-memory.dmp

    Filesize

    20KB

  • memory/1308-48-0x00000000029E0000-0x00000000029E5000-memory.dmp

    Filesize

    20KB

  • memory/1308-24-0x0000000002400000-0x000000000260F000-memory.dmp

    Filesize

    2.1MB

  • memory/1308-32-0x0000000002750000-0x0000000002760000-memory.dmp

    Filesize

    64KB

  • memory/1308-47-0x0000000002750000-0x0000000002760000-memory.dmp

    Filesize

    64KB

  • memory/1308-42-0x0000000002750000-0x0000000002760000-memory.dmp

    Filesize

    64KB

  • memory/1308-43-0x0000000002750000-0x0000000002760000-memory.dmp

    Filesize

    64KB

  • memory/1308-41-0x0000000002750000-0x0000000002760000-memory.dmp

    Filesize

    64KB

  • memory/1308-55-0x0000000007440000-0x000000000784B000-memory.dmp

    Filesize

    4.0MB

  • memory/1308-40-0x0000000002750000-0x0000000002760000-memory.dmp

    Filesize

    64KB

  • memory/1308-39-0x0000000002750000-0x0000000002760000-memory.dmp

    Filesize

    64KB

  • memory/1308-38-0x0000000002750000-0x0000000002760000-memory.dmp

    Filesize

    64KB

  • memory/1308-36-0x0000000002750000-0x0000000002760000-memory.dmp

    Filesize

    64KB

  • memory/3580-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/3580-1-0x00000000006B0000-0x00000000007B0000-memory.dmp

    Filesize

    1024KB

  • memory/3580-7-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/3580-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/3580-8-0x0000000002180000-0x0000000002193000-memory.dmp

    Filesize

    76KB

  • memory/3580-2-0x0000000002180000-0x0000000002193000-memory.dmp

    Filesize

    76KB

  • memory/4920-16-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/4920-13-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/4920-11-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/4920-12-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB