Analysis

  • max time kernel
    144s
  • max time network
    148s
  • 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 17:46

General

  • Target

    04a4ae292035cdb08ed939c6d104477a71f19396bb413d8258e618bfe19e1018.exe

  • Size

    196KB

  • MD5

    10ca914ac3dffb4ea2fea05db291a14e

  • SHA1

    5aeaf990cd8c88d38a14677797261ac950d174cb

  • SHA256

    04a4ae292035cdb08ed939c6d104477a71f19396bb413d8258e618bfe19e1018

  • SHA512

    72fc17e3bbad99bdf05df0bd3e1f59a99de9c1ade75042f1e19af66e1d55b195e040f4473c74c549bc400f7cc70078ff00c132466cf677209657bfdf2d690827

  • SSDEEP

    3072:njZ0ppLMOIV1A5jzi+wV5ilKPInP3dkCEBKd8uy/Pkk4x:jiLoVF+MyKIP3dnCu

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\04a4ae292035cdb08ed939c6d104477a71f19396bb413d8258e618bfe19e1018.exe
    "C:\Users\Admin\AppData\Local\Temp\04a4ae292035cdb08ed939c6d104477a71f19396bb413d8258e618bfe19e1018.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2656
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hvexnhnb\
      2⤵
        PID:4092
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\uhsxwtuh.exe" C:\Windows\SysWOW64\hvexnhnb\
        2⤵
          PID:4676
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create hvexnhnb binPath= "C:\Windows\SysWOW64\hvexnhnb\uhsxwtuh.exe /d\"C:\Users\Admin\AppData\Local\Temp\04a4ae292035cdb08ed939c6d104477a71f19396bb413d8258e618bfe19e1018.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2548
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description hvexnhnb "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:948
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start hvexnhnb
          2⤵
          • Launches sc.exe
          PID:5088
        • 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:3392
      • C:\Windows\SysWOW64\hvexnhnb\uhsxwtuh.exe
        C:\Windows\SysWOW64\hvexnhnb\uhsxwtuh.exe /d"C:\Users\Admin\AppData\Local\Temp\04a4ae292035cdb08ed939c6d104477a71f19396bb413d8258e618bfe19e1018.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:340
        • 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:4940
          • 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:1848

      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\uhsxwtuh.exe
        Filesize

        12.6MB

        MD5

        7826818bd6e4ef79317af96b155a6d32

        SHA1

        7fd79afce3fc3e0cc1fa8c2fc2a576846b46e15b

        SHA256

        02cb73be9ac8526b5f21ed7d3fefe6ef407aea7167a3ced6151513ec9de97074

        SHA512

        8d98310dd8f56dab3d00da44383b6819c8926f7810ad677399b246cf614d5f09d3f7239d7ec680de302d93f8a125f2be33863fc769de63083ae89260b0ab19f7

      • C:\Windows\SysWOW64\hvexnhnb\uhsxwtuh.exe
        Filesize

        12.6MB

        MD5

        7826818bd6e4ef79317af96b155a6d32

        SHA1

        7fd79afce3fc3e0cc1fa8c2fc2a576846b46e15b

        SHA256

        02cb73be9ac8526b5f21ed7d3fefe6ef407aea7167a3ced6151513ec9de97074

        SHA512

        8d98310dd8f56dab3d00da44383b6819c8926f7810ad677399b246cf614d5f09d3f7239d7ec680de302d93f8a125f2be33863fc769de63083ae89260b0ab19f7

      • memory/340-307-0x0000000000881000-0x0000000000892000-memory.dmp
        Filesize

        68KB

      • memory/340-311-0x0000000000400000-0x000000000058B000-memory.dmp
        Filesize

        1.5MB

      • memory/340-290-0x0000000000590000-0x00000000006DA000-memory.dmp
        Filesize

        1.3MB

      • memory/340-287-0x0000000000881000-0x0000000000892000-memory.dmp
        Filesize

        68KB

      • memory/948-186-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/948-185-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/948-184-0x0000000000000000-mapping.dmp
      • memory/1848-519-0x0000000000A9259C-mapping.dmp
      • memory/2548-182-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2548-183-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2548-181-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2548-180-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2548-179-0x0000000000000000-mapping.dmp
      • memory/2656-136-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-165-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-132-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-133-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-134-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-135-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-115-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-137-0x0000000000620000-0x000000000076A000-memory.dmp
        Filesize

        1.3MB

      • memory/2656-138-0x00000000005E0000-0x00000000005F3000-memory.dmp
        Filesize

        76KB

      • memory/2656-139-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-140-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-141-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-142-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-143-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-144-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-145-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-146-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-147-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-148-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-149-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-150-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-151-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-152-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-153-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-154-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-155-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-156-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-157-0x0000000000400000-0x000000000058B000-memory.dmp
        Filesize

        1.5MB

      • memory/2656-158-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-159-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-160-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-161-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-162-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-163-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-164-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-131-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-116-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-117-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-118-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-119-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-120-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-228-0x0000000000400000-0x000000000058B000-memory.dmp
        Filesize

        1.5MB

      • memory/2656-225-0x00000000005E0000-0x00000000005F3000-memory.dmp
        Filesize

        76KB

      • memory/2656-121-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-122-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-123-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-124-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-125-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-130-0x0000000000766000-0x0000000000776000-memory.dmp
        Filesize

        64KB

      • memory/2656-129-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-128-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-127-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/2656-126-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/3392-219-0x0000000000000000-mapping.dmp
      • memory/4092-168-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/4092-171-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/4092-166-0x0000000000000000-mapping.dmp
      • memory/4092-167-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/4092-170-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/4092-169-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/4676-172-0x0000000000000000-mapping.dmp
      • memory/4676-175-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/4676-174-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/4676-176-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/4676-177-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/4676-173-0x00000000775D0000-0x000000007775E000-memory.dmp
        Filesize

        1.6MB

      • memory/4940-303-0x0000000000EE9A6B-mapping.dmp
      • memory/4940-387-0x0000000000EE0000-0x0000000000EF5000-memory.dmp
        Filesize

        84KB

      • memory/4940-484-0x0000000000EE0000-0x0000000000EF5000-memory.dmp
        Filesize

        84KB

      • memory/5088-201-0x0000000000000000-mapping.dmp