Analysis

  • max time kernel
    150s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240704-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08-07-2024 15:22

General

  • Target

    SecuriteInfo.com.Win32.CrypterX-gen.13041.27911.exe

  • Size

    165KB

  • MD5

    56781772c92e1822beec9faee18fadc9

  • SHA1

    889af8e28ecda1df1e79c1f4abe533959b29a9db

  • SHA256

    4f0a6b89e63437c52a7adf09a15950b3ba5b9d1d7c8791a8559721ae24875894

  • SHA512

    7a46f160e3881578c8991ed07a746696738eb994b8f161796ef87081d1d6345927149f168197300750862564b672abaf522db193aa43d980aeef2abd115a460f

  • SSDEEP

    3072:jJLNXOgUQ4IiNpjhmD/Sc11y5Td0Cfq/UVwE7wQWLc:NLNXXUki1mTUmH

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.

  • Creates new service(s) 2 TTPs
  • Modifies Windows Firewall 2 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.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 1 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).

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • Program crash 2 IoCs
  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.CrypterX-gen.13041.27911.exe
    "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.CrypterX-gen.13041.27911.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1132
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qawhfqy\
      2⤵
        PID:3036
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dtpezrpx.exe" C:\Windows\SysWOW64\qawhfqy\
        2⤵
          PID:3216
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create qawhfqy binPath= "C:\Windows\SysWOW64\qawhfqy\dtpezrpx.exe /d\"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.CrypterX-gen.13041.27911.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1960
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description qawhfqy "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2004
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start qawhfqy
          2⤵
          • Launches sc.exe
          PID:4232
        • 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
          • Event Triggered Execution: Netsh Helper DLL
          PID:1572
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1132 -s 1040
          2⤵
          • Program crash
          PID:5088
      • C:\Windows\SysWOW64\qawhfqy\dtpezrpx.exe
        C:\Windows\SysWOW64\qawhfqy\dtpezrpx.exe /d"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.CrypterX-gen.13041.27911.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:224
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:2068
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 224 -s 516
          2⤵
          • Program crash
          PID:3112
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 1132 -ip 1132
        1⤵
          PID:4064
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 224 -ip 224
          1⤵
            PID:2496

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            14.9MB

            MD5

            a1b73937b8f36117f7bf8eb51d315ebb

            SHA1

            5d3c0d643498898bb3fca4189624ae4df1ecb54c

            SHA256

            c1c548bbab24b987f5ea4b7ba42cd5927c3a5ffde20b7a1650fb730fd77fcad4

            SHA512

            ad1c275f0281d2371f03c6c15f8816ead81e98227458b772a5757518b8949c9dbb774101600df99d39bd5971ef2ba09fea1da3bb0cd6fb875c57d4f81470950b

          • memory/224-18-0x0000000000400000-0x00000000004C4000-memory.dmp
            Filesize

            784KB

          • memory/224-12-0x0000000000400000-0x00000000004C4000-memory.dmp
            Filesize

            784KB

          • memory/224-11-0x0000000000400000-0x00000000004C4000-memory.dmp
            Filesize

            784KB

          • memory/1132-2-0x0000000002210000-0x0000000002223000-memory.dmp
            Filesize

            76KB

          • memory/1132-4-0x0000000000400000-0x0000000000415000-memory.dmp
            Filesize

            84KB

          • memory/1132-7-0x0000000000400000-0x00000000004C4000-memory.dmp
            Filesize

            784KB

          • memory/1132-9-0x0000000000400000-0x0000000000415000-memory.dmp
            Filesize

            84KB

          • memory/1132-8-0x0000000002210000-0x0000000002223000-memory.dmp
            Filesize

            76KB

          • memory/1132-1-0x0000000000770000-0x0000000000870000-memory.dmp
            Filesize

            1024KB

          • memory/2068-46-0x00000000021F0000-0x0000000002200000-memory.dmp
            Filesize

            64KB

          • memory/2068-38-0x00000000021F0000-0x0000000002200000-memory.dmp
            Filesize

            64KB

          • memory/2068-15-0x0000000000B30000-0x0000000000B45000-memory.dmp
            Filesize

            84KB

          • memory/2068-45-0x00000000021F0000-0x0000000002200000-memory.dmp
            Filesize

            64KB

          • memory/2068-55-0x0000000002DE0000-0x0000000002DE7000-memory.dmp
            Filesize

            28KB

          • memory/2068-51-0x0000000007900000-0x0000000007D0B000-memory.dmp
            Filesize

            4.0MB

          • memory/2068-50-0x0000000002DD0000-0x0000000002DD5000-memory.dmp
            Filesize

            20KB

          • memory/2068-47-0x0000000002DD0000-0x0000000002DD5000-memory.dmp
            Filesize

            20KB

          • memory/2068-13-0x0000000000B30000-0x0000000000B45000-memory.dmp
            Filesize

            84KB

          • memory/2068-44-0x00000000021F0000-0x0000000002200000-memory.dmp
            Filesize

            64KB

          • memory/2068-43-0x00000000021F0000-0x0000000002200000-memory.dmp
            Filesize

            64KB

          • memory/2068-42-0x00000000021F0000-0x0000000002200000-memory.dmp
            Filesize

            64KB

          • memory/2068-41-0x00000000021F0000-0x0000000002200000-memory.dmp
            Filesize

            64KB

          • memory/2068-40-0x00000000021F0000-0x0000000002200000-memory.dmp
            Filesize

            64KB

          • memory/2068-39-0x00000000021F0000-0x0000000002200000-memory.dmp
            Filesize

            64KB

          • memory/2068-16-0x0000000000B30000-0x0000000000B45000-memory.dmp
            Filesize

            84KB

          • memory/2068-37-0x00000000021F0000-0x0000000002200000-memory.dmp
            Filesize

            64KB

          • memory/2068-36-0x00000000021F0000-0x0000000002200000-memory.dmp
            Filesize

            64KB

          • memory/2068-35-0x00000000021F0000-0x0000000002200000-memory.dmp
            Filesize

            64KB

          • memory/2068-33-0x00000000021F0000-0x0000000002200000-memory.dmp
            Filesize

            64KB

          • memory/2068-31-0x00000000021F0000-0x0000000002200000-memory.dmp
            Filesize

            64KB

          • memory/2068-32-0x00000000021F0000-0x0000000002200000-memory.dmp
            Filesize

            64KB

          • memory/2068-30-0x00000000021F0000-0x0000000002200000-memory.dmp
            Filesize

            64KB

          • memory/2068-54-0x0000000007900000-0x0000000007D0B000-memory.dmp
            Filesize

            4.0MB

          • memory/2068-27-0x00000000021F0000-0x0000000002200000-memory.dmp
            Filesize

            64KB

          • memory/2068-24-0x0000000000BF0000-0x0000000000BF6000-memory.dmp
            Filesize

            24KB

          • memory/2068-23-0x0000000002A00000-0x0000000002C0F000-memory.dmp
            Filesize

            2.1MB

          • memory/2068-34-0x00000000021F0000-0x0000000002200000-memory.dmp
            Filesize

            64KB

          • memory/2068-21-0x0000000002A00000-0x0000000002C0F000-memory.dmp
            Filesize

            2.1MB