Analysis

  • max time kernel
    144s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15-04-2024 23:00

General

  • Target

    f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe

  • Size

    13.1MB

  • MD5

    f21f4614358cdb18bcc75489077f6e50

  • SHA1

    3fbcc2f1bd4dce604cfb468ef882ce93388f1015

  • SHA256

    7a975f0197744ff65ed0c6ab56576c5b40bf11176e6f43f9945072a9bb3660e0

  • SHA512

    95f8f87568983cc69a13b4d023520364e52ceb241474aeb1bd4a91b59d483b002653c15b0bb6b9b8aff76f363a305aabc03872696440f76f0e2e1e71431583c5

  • SSDEEP

    49152:Yjrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrj:e

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Creates new service(s) 1 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
  • 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).

  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1616
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\smacvtjr\
      2⤵
        PID:3972
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vhicxtur.exe" C:\Windows\SysWOW64\smacvtjr\
        2⤵
          PID:2892
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create smacvtjr binPath= "C:\Windows\SysWOW64\smacvtjr\vhicxtur.exe /d\"C:\Users\Admin\AppData\Local\Temp\f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1456
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description smacvtjr "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:3800
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start smacvtjr
          2⤵
          • Launches sc.exe
          PID:1604
        • 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
          PID:4124
      • C:\Windows\SysWOW64\smacvtjr\vhicxtur.exe
        C:\Windows\SysWOW64\smacvtjr\vhicxtur.exe /d"C:\Users\Admin\AppData\Local\Temp\f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2120
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          PID:4336
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4396 --field-trial-handle=2280,i,4114443225282860369,4764091921472631035,262144 --variations-seed-version /prefetch:8
        1⤵
          PID:4468

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          12.0MB

          MD5

          494d6c5871990741477b194be024793d

          SHA1

          46f311ec27da687404ee0e1fdd16f422983992bb

          SHA256

          0b3518a5cf0c37ac2aa85ce62306dfcc375fffe217c7760ae254a0fe3e8ccae1

          SHA512

          f00d670fed31c6967a186592e1e82222abbe9c13d88a97fc2e8ad6a969ad96d4d5af8703944120ad2015cbb6f2ecd3b7509812ae28eebe2eb474c98320ec96e6

        • memory/1616-0-0x0000000000400000-0x000000000041E000-memory.dmp

          Filesize

          120KB

        • memory/1616-2-0x0000000000400000-0x000000000041E000-memory.dmp

          Filesize

          120KB

        • memory/1616-3-0x0000000000500000-0x0000000000501000-memory.dmp

          Filesize

          4KB

        • memory/1616-1-0x00000000004F0000-0x00000000004F1000-memory.dmp

          Filesize

          4KB

        • memory/1616-6-0x0000000000400000-0x000000000041E000-memory.dmp

          Filesize

          120KB

        • memory/2120-8-0x0000000000400000-0x000000000041E000-memory.dmp

          Filesize

          120KB

        • memory/2120-9-0x0000000000580000-0x0000000000581000-memory.dmp

          Filesize

          4KB

        • memory/2120-13-0x0000000000400000-0x000000000041E000-memory.dmp

          Filesize

          120KB

        • memory/4336-11-0x0000000000A90000-0x0000000000AA5000-memory.dmp

          Filesize

          84KB

        • memory/4336-16-0x0000000000A90000-0x0000000000AA5000-memory.dmp

          Filesize

          84KB

        • memory/4336-17-0x0000000000A90000-0x0000000000AA5000-memory.dmp

          Filesize

          84KB

        • memory/4336-18-0x0000000000A90000-0x0000000000AA5000-memory.dmp

          Filesize

          84KB