Analysis Overview
SHA256
b87856de071e050ce4e114417c5a41b1025cc41e9722da4be0791aef1ae05838
Threat Level: Shows suspicious behavior
The file dd2735c0c6c41563e86b234758b2b1b2 was found to be: Shows suspicious behavior.
Malicious Activity Summary
ACProtect 1.3x - 1.4x DLL software
Loads dropped DLL
UPX packed file
Checks computer location settings
Installs/modifies Browser Helper Object
Drops file in System32 directory
Unsigned PE
Modifies Internet Explorer settings
Modifies registry class
Modifies Control Panel
Modifies Internet Explorer start page
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-03-25 03:44
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-03-25 03:44
Reported
2024-03-25 03:46
Platform
win7-20240221-en
Max time kernel
119s
Max time network
119s
Command Line
Signatures
ACProtect 1.3x - 1.4x DLL software
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\dd2735c0c6c41563e86b234758b2b1b2.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\regsvr32.exe | N/A |
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Installs/modifies Browser Helper Object
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{E3422DF3-154C-42F1-BEED-DF45BEEB4B1A} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{E9DE5CC3-9347-4BB1-9D1B-320B77F7E9B2} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key deleted | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{E9DE5CC3-9347-4BB1-9D1B-320B77F7E9B2} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{A7E2C9D8-7F8C-49EC-96A3-1956727E4655} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key deleted | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{A7E2C9D8-7F8C-49EC-96A3-1956727E4655} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\dskrfuoui.dll | C:\Users\Admin\AppData\Local\Temp\dd2735c0c6c41563e86b234758b2b1b2.exe | N/A |
Modifies Control Panel
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Control Panel\International\Geo | C:\Users\Admin\AppData\Local\Temp\dd2735c0c6c41563e86b234758b2b1b2.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Control Panel\International | C:\Users\Admin\AppData\Local\Temp\dd2735c0c6c41563e86b234758b2b1b2.exe | N/A |
Modifies Internet Explorer settings
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Internet Explorer\Main\HOMEOldSP = "about:blank" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Internet Explorer\Main\Search Bar = "res://%43%3a%5c%57%69%6e%64%6f%77%73%5c%73%79%73%74%65%6d%33%32%5c%64%73%6b%72%66%75%6f%75%69%2e%64%6c%6c/%73%70%2e%68%74%6d%6c" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Internet Explorer\Main\Use Search Asst = "no" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Internet Explorer\Search\SearchAssistant = "res://%43%3a%5c%57%69%6e%64%6f%77%73%5c%73%79%73%74%65%6d%33%32%5c%64%73%6b%72%66%75%6f%75%69%2e%64%6c%6c/%73%70%2e%68%74%6d%6c" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (int) | \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Internet Explorer\Main\Use Custom Search URL = "1" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Internet Explorer\Main | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\MAIN\Use Search Asst = "no" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Internet Explorer\Search | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Main | C:\Users\Admin\AppData\Local\Temp\dd2735c0c6c41563e86b234758b2b1b2.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Internet Explorer\Search | C:\Users\Admin\AppData\Local\Temp\dd2735c0c6c41563e86b234758b2b1b2.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Internet Explorer\Main | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Internet Explorer\Main\Search Page = "res://%43%3a%5c%57%69%6e%64%6f%77%73%5c%73%79%73%74%65%6d%33%32%5c%64%73%6b%72%66%75%6f%75%69%2e%64%6c%6c/%73%70%2e%68%74%6d%6c" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Internet Explorer\Search | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\MAIN\Search Bar = "res://%43%3a%5c%57%69%6e%64%6f%77%73%5c%73%79%73%74%65%6d%33%32%5c%64%73%6b%72%66%75%6f%75%69%2e%64%6c%6c/%73%70%2e%68%74%6d%6c" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\MAIN\Use Custom Search URL = "1" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\MAIN\HOMEOldSP = "about:blank" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\MAIN\Search Page = "res://%43%3a%5c%57%69%6e%64%6f%77%73%5c%73%79%73%74%65%6d%33%32%5c%64%73%6b%72%66%75%6f%75%69%2e%64%6c%6c/%73%70%2e%68%74%6d%6c" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Search\SearchAssistant = "res://%43%3a%5c%57%69%6e%64%6f%77%73%5c%73%79%73%74%65%6d%33%32%5c%64%73%6b%72%66%75%6f%75%69%2e%64%6c%6c/%73%70%2e%68%74%6d%6c" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Modifies Internet Explorer start page
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Internet Explorer\Main\Start Page = "about:blank" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\MAIN\Start Page = "about:blank" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{ABB72AF8-D9FC-4142-B87F-568B557B199A}\InProcServer32\ = "C:\\Windows\\SysWow64\\dskrfuoui.dll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{A8F4A9CF-D586-4202-90EF-591930316FEB}\InProcServer32\ = "C:\\Windows\\SysWow64\\dskrfuoui.dll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\PROTOCOLS\Filter\text/html\CLSID = "{ABB72AF8-D9FC-4142-B87F-568B557B199A}" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\PROTOCOLS\Filter\text/plain | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{04081602-03AD-406A-AE93-A968FD573E6D}\InProcServer32\ = "C:\\Windows\\SysWow64\\dskrfuoui.dll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{A7E2C9D8-7F8C-49EC-96A3-1956727E4655}\InProcServer32\ = "C:\\Windows\\SysWow64\\dskrfuoui.dll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{E3422DF3-154C-42F1-BEED-DF45BEEB4B1A}\InProcServer32\ = "C:\\Windows\\SysWow64\\dskrfuoui.dll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{E9DE5CC3-9347-4BB1-9D1B-320B77F7E9B2} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{04081602-03AD-406A-AE93-A968FD573E6D}\InProcServer32 | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{04081602-03AD-406A-AE93-A968FD573E6D}\InProcServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{ABB72AF8-D9FC-4142-B87F-568B557B199A}\InProcServer32 | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{E9DE5CC3-9347-4BB1-9D1B-320B77F7E9B2}\InProcServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{E9DE5CC3-9347-4BB1-9D1B-320B77F7E9B2}\InProcServer32\ = "C:\\Windows\\SysWow64\\dskrfuoui.dll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{04081602-03AD-406A-AE93-A968FD573E6D} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{A8F4A9CF-D586-4202-90EF-591930316FEB} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{A7E2C9D8-7F8C-49EC-96A3-1956727E4655}\InProcServer32 | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{E3422DF3-154C-42F1-BEED-DF45BEEB4B1A}\InProcServer32 | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{E3422DF3-154C-42F1-BEED-DF45BEEB4B1A} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\PROTOCOLS\Filter\text/plain\CLSID = "{ABB72AF8-D9FC-4142-B87F-568B557B199A}" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{E9DE5CC3-9347-4BB1-9D1B-320B77F7E9B2}\InProcServer32 | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\PROTOCOLS\Filter\text/plain\CLSID = "{04081602-03AD-406A-AE93-A968FD573E6D}" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\PROTOCOLS\Filter\text/html\CLSID = "{A8F4A9CF-D586-4202-90EF-591930316FEB}" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\PROTOCOLS\Filter\text/plain\CLSID = "{A8F4A9CF-D586-4202-90EF-591930316FEB}" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\PROTOCOLS\Filter\text/html | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{A7E2C9D8-7F8C-49EC-96A3-1956727E4655}\InProcServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{A8F4A9CF-D586-4202-90EF-591930316FEB}\InProcServer32 | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{A7E2C9D8-7F8C-49EC-96A3-1956727E4655} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{A8F4A9CF-D586-4202-90EF-591930316FEB}\InProcServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{E3422DF3-154C-42F1-BEED-DF45BEEB4B1A}\InProcServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{ABB72AF8-D9FC-4142-B87F-568B557B199A} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{ABB72AF8-D9FC-4142-B87F-568B557B199A}\InProcServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\PROTOCOLS\Filter\text/html\CLSID = "{04081602-03AD-406A-AE93-A968FD573E6D}" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\dd2735c0c6c41563e86b234758b2b1b2.exe
"C:\Users\Admin\AppData\Local\Temp\dd2735c0c6c41563e86b234758b2b1b2.exe"
C:\Windows\SysWOW64\regsvr32.exe
regsvr32.exe /s C:\Windows\system32\dskrfuoui.dll
Network
Files
memory/2076-3-0x0000000010000000-0x0000000010013000-memory.dmp
\Windows\SysWOW64\dskrfuoui.dll
| MD5 | a432f83f41b0e513b8f14b99e579e5fb |
| SHA1 | f94d032dc9b76926f8c89d4438c3b4b2ebd34d1a |
| SHA256 | 448fc3bcb92e57ab40594427f1138d28856f6a5b33306df3030792d22f97566a |
| SHA512 | 0a05e57b5be4970262d5338bf6b1ccd844e5ec21c2edb3655105179facb42fbc45e3be1abc32bfd9b4b4669bf46d7cde47cdaa41c393c50d340b027fc42fd0ac |
memory/2076-4-0x0000000010000000-0x0000000010013000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-03-25 03:44
Reported
2024-03-25 03:46
Platform
win10v2004-20240226-en
Max time kernel
146s
Max time network
150s
Command Line
Signatures
ACProtect 1.3x - 1.4x DLL software
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\dd2735c0c6c41563e86b234758b2b1b2.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\regsvr32.exe | N/A |
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Installs/modifies Browser Helper Object
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{4957A9AF-2290-4762-A9E1-65F0917C9E5A} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key deleted | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{4957A9AF-2290-4762-A9E1-65F0917C9E5A} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{D8AD6363-C38A-436A-8942-C2B72EC13BB5} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key deleted | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{D8AD6363-C38A-436A-8942-C2B72EC13BB5} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{5F1ABF47-A9AB-42AA-9272-B548C6D5CA1D} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\dskrfuoui.dll | C:\Users\Admin\AppData\Local\Temp\dd2735c0c6c41563e86b234758b2b1b2.exe | N/A |
Modifies Control Panel
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo | C:\Users\Admin\AppData\Local\Temp\dd2735c0c6c41563e86b234758b2b1b2.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International | C:\Users\Admin\AppData\Local\Temp\dd2735c0c6c41563e86b234758b2b1b2.exe | N/A |
Modifies Internet Explorer settings
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\SOFTWARE\Microsoft\Internet Explorer\Main\HOMEOldSP = "about:blank" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Internet Explorer\Main | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\Search Bar = "res://%43%3a%5c%57%69%6e%64%6f%77%73%5c%73%79%73%74%65%6d%33%32%5c%64%73%6b%72%66%75%6f%75%69%2e%64%6c%6c/%73%70%2e%68%74%6d%6c" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Internet Explorer\Search | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Internet Explorer\Search | C:\Users\Admin\AppData\Local\Temp\dd2735c0c6c41563e86b234758b2b1b2.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\Software\Microsoft\Internet Explorer\Main | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Use Search Asst = "no" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\HOMEOldSP = "about:blank" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\Search Page = "res://%43%3a%5c%57%69%6e%64%6f%77%73%5c%73%79%73%74%65%6d%33%32%5c%64%73%6b%72%66%75%6f%75%69%2e%64%6c%6c/%73%70%2e%68%74%6d%6c" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Search Page = "res://%43%3a%5c%57%69%6e%64%6f%77%73%5c%73%79%73%74%65%6d%33%32%5c%64%73%6b%72%66%75%6f%75%69%2e%64%6c%6c/%73%70%2e%68%74%6d%6c" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Search Bar = "res://%43%3a%5c%57%69%6e%64%6f%77%73%5c%73%79%73%74%65%6d%33%32%5c%64%73%6b%72%66%75%6f%75%69%2e%64%6c%6c/%73%70%2e%68%74%6d%6c" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (int) | \REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Use Custom Search URL = "1" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\Software\Microsoft\Internet Explorer\Search | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\SOFTWARE\Microsoft\Internet Explorer\Search\SearchAssistant = "res://%43%3a%5c%57%69%6e%64%6f%77%73%5c%73%79%73%74%65%6d%33%32%5c%64%73%6b%72%66%75%6f%75%69%2e%64%6c%6c/%73%70%2e%68%74%6d%6c" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\Use Search Asst = "no" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\Use Custom Search URL = "1" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Search\SearchAssistant = "res://%43%3a%5c%57%69%6e%64%6f%77%73%5c%73%79%73%74%65%6d%33%32%5c%64%73%6b%72%66%75%6f%75%69%2e%64%6c%6c/%73%70%2e%68%74%6d%6c" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main | C:\Users\Admin\AppData\Local\Temp\dd2735c0c6c41563e86b234758b2b1b2.exe | N/A |
Modifies Internet Explorer start page
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Start Page = "about:blank" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\Start Page = "about:blank" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CBBF1C85-E728-48A2-9046-7F8EF056D8B4} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CBBF1C85-E728-48A2-9046-7F8EF056D8B4}\InProcServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CBBF1C85-E728-48A2-9046-7F8EF056D8B4}\InProcServer32 | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CBBF1C85-E728-48A2-9046-7F8EF056D8B4}\InProcServer32\ = "C:\\Windows\\SysWow64\\dskrfuoui.dll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D8AD6363-C38A-436A-8942-C2B72EC13BB5}\InProcServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5F1ABF47-A9AB-42AA-9272-B548C6D5CA1D} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5F1ABF47-A9AB-42AA-9272-B548C6D5CA1D}\InProcServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4957A9AF-2290-4762-A9E1-65F0917C9E5A} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\PROTOCOLS\Filter\text/plain | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D8AD6363-C38A-436A-8942-C2B72EC13BB5}\InProcServer32\ = "C:\\Windows\\SysWow64\\dskrfuoui.dll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\PROTOCOLS\Filter\text/html\CLSID = "{AF32DD22-CDE5-42F2-BDB4-18C83447AE57}" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\PROTOCOLS\Filter\text/plain\CLSID = "{AF32DD22-CDE5-42F2-BDB4-18C83447AE57}" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\PROTOCOLS\Filter\text/html\CLSID = "{8AFB9D84-3148-4B1E-A535-5CA9D4631B7F}" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8AFB9D84-3148-4B1E-A535-5CA9D4631B7F}\InProcServer32\ = "C:\\Windows\\SysWow64\\dskrfuoui.dll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{AF32DD22-CDE5-42F2-BDB4-18C83447AE57}\InProcServer32 | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{AF32DD22-CDE5-42F2-BDB4-18C83447AE57}\InProcServer32\ = "C:\\Windows\\SysWow64\\dskrfuoui.dll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5F1ABF47-A9AB-42AA-9272-B548C6D5CA1D}\InProcServer32 | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5F1ABF47-A9AB-42AA-9272-B548C6D5CA1D}\InProcServer32\ = "C:\\Windows\\SysWow64\\dskrfuoui.dll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D8AD6363-C38A-436A-8942-C2B72EC13BB5} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8AFB9D84-3148-4B1E-A535-5CA9D4631B7F} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4957A9AF-2290-4762-A9E1-65F0917C9E5A}\InProcServer32 | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4957A9AF-2290-4762-A9E1-65F0917C9E5A}\InProcServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{AF32DD22-CDE5-42F2-BDB4-18C83447AE57}\InProcServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8AFB9D84-3148-4B1E-A535-5CA9D4631B7F}\InProcServer32 | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\PROTOCOLS\Filter\text/html | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\PROTOCOLS\Filter\text/plain\CLSID = "{8AFB9D84-3148-4B1E-A535-5CA9D4631B7F}" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4957A9AF-2290-4762-A9E1-65F0917C9E5A}\InProcServer32\ = "C:\\Windows\\SysWow64\\dskrfuoui.dll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\PROTOCOLS\Filter\text/plain\CLSID = "{CBBF1C85-E728-48A2-9046-7F8EF056D8B4}" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{AF32DD22-CDE5-42F2-BDB4-18C83447AE57} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8AFB9D84-3148-4B1E-A535-5CA9D4631B7F}\InProcServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D8AD6363-C38A-436A-8942-C2B72EC13BB5}\InProcServer32 | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\PROTOCOLS\Filter\text/html\CLSID = "{CBBF1C85-E728-48A2-9046-7F8EF056D8B4}" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3844 wrote to memory of 2920 | N/A | C:\Users\Admin\AppData\Local\Temp\dd2735c0c6c41563e86b234758b2b1b2.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 3844 wrote to memory of 2920 | N/A | C:\Users\Admin\AppData\Local\Temp\dd2735c0c6c41563e86b234758b2b1b2.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 3844 wrote to memory of 2920 | N/A | C:\Users\Admin\AppData\Local\Temp\dd2735c0c6c41563e86b234758b2b1b2.exe | C:\Windows\SysWOW64\regsvr32.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\dd2735c0c6c41563e86b234758b2b1b2.exe
"C:\Users\Admin\AppData\Local\Temp\dd2735c0c6c41563e86b234758b2b1b2.exe"
C:\Windows\SysWOW64\regsvr32.exe
regsvr32.exe /s C:\Windows\system32\dskrfuoui.dll
C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3856 --field-trial-handle=2228,i,521073434451423547,2311651514500527526,262144 --variations-seed-version /prefetch:8
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 13.86.106.20.in-addr.arpa | udp |
| US | 20.231.121.79:80 | tcp | |
| US | 8.8.8.8:53 | 73.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 9.228.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.58.199.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 232.168.11.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 86.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.126.166.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 133.211.185.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 104.241.123.92.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 119.110.54.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 174.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 32.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 23.236.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 211.178.17.96.in-addr.arpa | udp |
| US | 13.107.246.64:443 | tcp | |
| US | 8.8.8.8:53 | chromewebstore.googleapis.com | udp |
| US | 8.8.8.8:53 | chromewebstore.googleapis.com | udp |
| GB | 172.217.169.74:443 | chromewebstore.googleapis.com | tcp |
| US | 8.8.8.8:53 | 74.169.217.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.135.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 57.169.31.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
Files
C:\Windows\SysWOW64\dskrfuoui.dll
| MD5 | a432f83f41b0e513b8f14b99e579e5fb |
| SHA1 | f94d032dc9b76926f8c89d4438c3b4b2ebd34d1a |
| SHA256 | 448fc3bcb92e57ab40594427f1138d28856f6a5b33306df3030792d22f97566a |
| SHA512 | 0a05e57b5be4970262d5338bf6b1ccd844e5ec21c2edb3655105179facb42fbc45e3be1abc32bfd9b4b4669bf46d7cde47cdaa41c393c50d340b027fc42fd0ac |
memory/2920-3-0x0000000010000000-0x0000000010013000-memory.dmp