Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08-09-2024 02:37

General

  • Target

    569edae4e4c7f5df590c7ee0a96210942e2be22be73beda9bc1528addca234f4.exe

  • Size

    399KB

  • MD5

    f7ae445081e10267d2cec9b6b0e2d375

  • SHA1

    e12892ea4d092e4b959617c6d00356ee23da0797

  • SHA256

    569edae4e4c7f5df590c7ee0a96210942e2be22be73beda9bc1528addca234f4

  • SHA512

    194a260edb0ce0d6c9b74484b55d64e8d593c990ca647acf4c24dd4b58abee0e586485fb06970557d83cc97159933b55a9fa3cc9316f52c28d86552aa039ab04

  • SSDEEP

    6144:ztRdHbfGeyTf8CJH1ci6aZRVDqQP4n48rMI8gVzuhZIIQFa0lw:ztRdHbfByTU3OTBtP44cMYW

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\569edae4e4c7f5df590c7ee0a96210942e2be22be73beda9bc1528addca234f4.exe
    "C:\Users\Admin\AppData\Local\Temp\569edae4e4c7f5df590c7ee0a96210942e2be22be73beda9bc1528addca234f4.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4144
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\oqbvhyem\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1424
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wuefhdgm.exe" C:\Windows\SysWOW64\oqbvhyem\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4964
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create oqbvhyem binPath= "C:\Windows\SysWOW64\oqbvhyem\wuefhdgm.exe /d\"C:\Users\Admin\AppData\Local\Temp\569edae4e4c7f5df590c7ee0a96210942e2be22be73beda9bc1528addca234f4.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:5012
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description oqbvhyem "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4032
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start oqbvhyem
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:372
    • 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:4884
  • C:\Windows\SysWOW64\oqbvhyem\wuefhdgm.exe
    C:\Windows\SysWOW64\oqbvhyem\wuefhdgm.exe /d"C:\Users\Admin\AppData\Local\Temp\569edae4e4c7f5df590c7ee0a96210942e2be22be73beda9bc1528addca234f4.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2792
    • 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:4768

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    13.8MB

    MD5

    a52ca16d4c6d4d60108b43f0e5cb9020

    SHA1

    507191f5248a8cb29dd49793f1f03701bfba9576

    SHA256

    f9af325ad94ffbcee0f737193fb438b117934b5a9cc800d11f9ce18570048bb2

    SHA512

    468cc0f13fd2de7bd918b5d6b3932aab9f16cf08a1b2d05b14f1f8bfe86db3a3ddf432d9749225cf1ca396177f218850331e5374fc8dff1e4112e0b7b1136d29

  • memory/2792-12-0x0000000000400000-0x000000000247C000-memory.dmp

    Filesize

    32.5MB

  • memory/4144-2-0x00000000041B0000-0x00000000041C3000-memory.dmp

    Filesize

    76KB

  • memory/4144-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/4144-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/4144-8-0x00000000041B0000-0x00000000041C3000-memory.dmp

    Filesize

    76KB

  • memory/4144-7-0x0000000000400000-0x000000000247C000-memory.dmp

    Filesize

    32.5MB

  • memory/4144-1-0x0000000002560000-0x0000000002660000-memory.dmp

    Filesize

    1024KB

  • memory/4768-40-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4768-34-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4768-14-0x0000000000940000-0x0000000000955000-memory.dmp

    Filesize

    84KB

  • memory/4768-20-0x0000000002800000-0x0000000002A0F000-memory.dmp

    Filesize

    2.1MB

  • memory/4768-51-0x0000000007740000-0x0000000007B4B000-memory.dmp

    Filesize

    4.0MB

  • memory/4768-47-0x0000000001FD0000-0x0000000001FD5000-memory.dmp

    Filesize

    20KB

  • memory/4768-44-0x0000000001FD0000-0x0000000001FD5000-memory.dmp

    Filesize

    20KB

  • memory/4768-43-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4768-42-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4768-41-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4768-11-0x0000000000940000-0x0000000000955000-memory.dmp

    Filesize

    84KB

  • memory/4768-39-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4768-38-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4768-36-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4768-35-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4768-15-0x0000000000940000-0x0000000000955000-memory.dmp

    Filesize

    84KB

  • memory/4768-33-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4768-32-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4768-31-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4768-30-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4768-28-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4768-27-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4768-24-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4768-52-0x0000000001FE0000-0x0000000001FE7000-memory.dmp

    Filesize

    28KB

  • memory/4768-49-0x0000000007740000-0x0000000007B4B000-memory.dmp

    Filesize

    4.0MB

  • memory/4768-37-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4768-29-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4768-17-0x0000000002800000-0x0000000002A0F000-memory.dmp

    Filesize

    2.1MB

  • memory/4768-21-0x00000000009F0000-0x00000000009F6000-memory.dmp

    Filesize

    24KB