Analysis

  • max time kernel
    164s
  • max time network
    185s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    19-06-2022 18:02

General

  • Target

    56cfd5956db2c918d9808739ee0529d998fdf99d7d80a3ea6200cef62fd2400e.exe

  • Size

    307KB

  • MD5

    0333fd1976f4e933b4c622af6932b6a2

  • SHA1

    231a09c00de679a7c659334656406f18086d66e6

  • SHA256

    56cfd5956db2c918d9808739ee0529d998fdf99d7d80a3ea6200cef62fd2400e

  • SHA512

    03ff82a042a65b88585956d46ea486252be405e1c3b774eb9ed49355213260c943deab8b356101dbb980d3c92d7bf857667fc3ba15fca2327b4a3cfaec14b560

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 14 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\56cfd5956db2c918d9808739ee0529d998fdf99d7d80a3ea6200cef62fd2400e.exe
    "C:\Users\Admin\AppData\Local\Temp\56cfd5956db2c918d9808739ee0529d998fdf99d7d80a3ea6200cef62fd2400e.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2304
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\pvqqngde\
      2⤵
        PID:4060
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ceieofly.exe" C:\Windows\SysWOW64\pvqqngde\
        2⤵
          PID:2804
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create pvqqngde binPath= "C:\Windows\SysWOW64\pvqqngde\ceieofly.exe /d\"C:\Users\Admin\AppData\Local\Temp\56cfd5956db2c918d9808739ee0529d998fdf99d7d80a3ea6200cef62fd2400e.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4700
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description pvqqngde "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4136
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start pvqqngde
          2⤵
          • Launches sc.exe
          PID:4976
        • 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:2336
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2304 -s 584
          2⤵
          • Program crash
          PID:4416
      • C:\Windows\SysWOW64\pvqqngde\ceieofly.exe
        C:\Windows\SysWOW64\pvqqngde\ceieofly.exe /d"C:\Users\Admin\AppData\Local\Temp\56cfd5956db2c918d9808739ee0529d998fdf99d7d80a3ea6200cef62fd2400e.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3464
        • 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:456
          • 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:636
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3464 -s 540
          2⤵
          • Program crash
          PID:1200
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 2304 -ip 2304
        1⤵
          PID:1044
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 3464 -ip 3464
          1⤵
            PID:892

          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\ceieofly.exe
            Filesize

            13.1MB

            MD5

            e58564434a0b62d3da176acfa6568263

            SHA1

            d7c02ec33c6fbaf3841d94f069a3764b4459e962

            SHA256

            2c0d84f94248d49783c429425388d7b5c21ff36ff5e55ba0fece54433aea7011

            SHA512

            6d3c46cd88d93741a485014772e58fff003f042df9756bd13835bc4f21b85e574b50ee20cdab1d9185bde991540961a19a51f746a6e54a9d0e253b8c26bfdd59

          • C:\Windows\SysWOW64\pvqqngde\ceieofly.exe
            Filesize

            13.1MB

            MD5

            e58564434a0b62d3da176acfa6568263

            SHA1

            d7c02ec33c6fbaf3841d94f069a3764b4459e962

            SHA256

            2c0d84f94248d49783c429425388d7b5c21ff36ff5e55ba0fece54433aea7011

            SHA512

            6d3c46cd88d93741a485014772e58fff003f042df9756bd13835bc4f21b85e574b50ee20cdab1d9185bde991540961a19a51f746a6e54a9d0e253b8c26bfdd59

          • memory/456-142-0x0000000000400000-0x0000000000415000-memory.dmp
            Filesize

            84KB

          • memory/456-153-0x0000000002400000-0x000000000260F000-memory.dmp
            Filesize

            2.1MB

          • memory/456-152-0x0000000000400000-0x0000000000415000-memory.dmp
            Filesize

            84KB

          • memory/456-156-0x0000000001770000-0x0000000001776000-memory.dmp
            Filesize

            24KB

          • memory/456-159-0x0000000001780000-0x0000000001790000-memory.dmp
            Filesize

            64KB

          • memory/456-162-0x00000000017F0000-0x00000000017F5000-memory.dmp
            Filesize

            20KB

          • memory/456-165-0x0000000007500000-0x000000000790B000-memory.dmp
            Filesize

            4.0MB

          • memory/456-168-0x00000000027D0000-0x00000000027D7000-memory.dmp
            Filesize

            28KB

          • memory/456-150-0x0000000000400000-0x0000000000415000-memory.dmp
            Filesize

            84KB

          • memory/456-141-0x0000000000000000-mapping.dmp
          • memory/636-177-0x0000000001200000-0x00000000012F1000-memory.dmp
            Filesize

            964KB

          • memory/636-171-0x0000000000000000-mapping.dmp
          • memory/636-172-0x0000000001200000-0x00000000012F1000-memory.dmp
            Filesize

            964KB

          • memory/2304-147-0x0000000002E8E000-0x0000000002E9C000-memory.dmp
            Filesize

            56KB

          • memory/2304-130-0x0000000002E8E000-0x0000000002E9C000-memory.dmp
            Filesize

            56KB

          • memory/2304-149-0x0000000000400000-0x0000000002C6C000-memory.dmp
            Filesize

            40.4MB

          • memory/2304-132-0x0000000000400000-0x0000000002C6C000-memory.dmp
            Filesize

            40.4MB

          • memory/2304-131-0x0000000002E10000-0x0000000002E23000-memory.dmp
            Filesize

            76KB

          • memory/2336-140-0x0000000000000000-mapping.dmp
          • memory/2804-134-0x0000000000000000-mapping.dmp
          • memory/3464-146-0x0000000002ED9000-0x0000000002EE7000-memory.dmp
            Filesize

            56KB

          • memory/3464-151-0x0000000000400000-0x0000000002C6C000-memory.dmp
            Filesize

            40.4MB

          • memory/3464-148-0x0000000000400000-0x0000000002C6C000-memory.dmp
            Filesize

            40.4MB

          • memory/3464-143-0x0000000002ED9000-0x0000000002EE7000-memory.dmp
            Filesize

            56KB

          • memory/4060-133-0x0000000000000000-mapping.dmp
          • memory/4136-137-0x0000000000000000-mapping.dmp
          • memory/4700-136-0x0000000000000000-mapping.dmp
          • memory/4976-138-0x0000000000000000-mapping.dmp