Analysis
- max time kernel
148s - max time network
143s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows - submitted
06/10/2026, 13:34
Behavioral task
behavioral1
Sample
jaffacakes118_Trojan-Downloader.Win32.Small.oi.dll
Resource
win10v2004-20260911-en
windows10-2004-x64
8 signatures
150 seconds
General
- Target jaffacakes118_Trojan-Downloader.Win32.Small.oi.dll
- Size 53KB
- Sample261006-qvecqsfb32
- SHA256 15b173d7d496e17bbffe13f856f5e5ac2f7860d3730a42ad0cf7c21f9f809f36
- MD5 6d753a5f9d0b5001c52453a22aeaa149
- SHA1 f7b4f4da7605b6013d3fabafe38efa2278540b4b
- SHA512 0f34768236007df807561efdd71031ffa30557322531e8899a3b0125b92a88601a3a3a9a6f8052dbe614c1b25472794b330a9e304a2aa857de960b0093baf199
- SSDEEP 1536:N1D1PEJ/K7vt2RgxKhoPlGa2v8/ey/5Eb0mY9kth:N1xPh7vaOKh0tn/eywY9kj
- TLSH T13933BE71F686E114F47A1A3845FE26AAD331FED22E96060E72CC3B9D0B749C95308B55
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-461973139-3212354679-1508698038-1000\Software\Microsoft\Windows\CurrentVersion\Run\Host regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Host regsvr32.exe - Installs/modifies Browser Helper Object 2 TTPs 5 IoCs
BHOs are DLL modules which act as plugins for Internet Explorer.
description ioc Process Key deleted \REGISTRY\MACHINE\SOFTWARE\WOW6432NODE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\BROWSER HELPER OBJECTS\{1FD49718-1D00-4B19-AF5F-070AF6D5D54C} regsvr32.exe Key deleted \REGISTRY\MACHINE\SOFTWARE\WOW6432NODE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\BROWSER HELPER OBJECTS\{31D09BA0-12F5-4CCE-BE8A-2923E76605DA} regsvr32.exe Key deleted \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{834261E1-DD97-4177-853B-C907E5D5BD6E} regsvr32.exe -
resource yara_rule behavioral2/memory/2388-0-0x0000000010000000-0x000000001001B000-memory.dmp upx - System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language regsvr32.exe -
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-461973139-3212354679-1508698038-1000\Software\Microsoft\Internet Explorer\Main\Search Page = "http://%68%6F%6D%65%70%61%67%65%2E%63%6F%6D\x01%00@%77%77%77%2E%65%2D%66%69%6E%64%65%72%2E%63%63/%73%65%61%72%63%68/" regsvr32.exe Set value (str) \REGISTRY\USER\S-1-5-21-461973139-3212354679-1508698038-1000\Software\Microsoft\Internet Explorer\SearchUrl\ = "http://%68%6F%6D%65%70%61%67%65%2E%63%6F%6D\x01%00@%77%77%77%2E%65%2D%66%69%6E%64%65%72%2E%63%63/%73%65%61%72%63%68/" regsvr32.exe Set value (str) \REGISTRY\USER\S-1-5-21-461973139-3212354679-1508698038-1000\Software\Microsoft\Internet Explorer\Search\SearchAssistant = "http://%68%6F%6D%65%70%61%67%65%2E%63%6F%6D\x01%00@%77%77%77%2E%65%2D%66%69%6E%64%65%72%2E%63%63/%73%65%61%72%63%68/" regsvr32.exe Set value (str) \REGISTRY\USER\S-1-5-21-461973139-3212354679-1508698038-1000\Software\Microsoft\Internet Explorer\Main\Default_Search_URL = "http://%68%6F%6D%65%70%61%67%65%2E%63%6F%6D\x01%00@%77%77%77%2E%65%2D%66%69%6E%64%65%72%2E%63%63/%73%65%61%72%63%68/" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\Default_Search_URL = "http://%68%6F%6D%65%70%61%67%65%2E%63%6F%6D\x01%00@%77%77%77%2E%65%2D%66%69%6E%64%65%72%2E%63%63/%73%65%61%72%63%68/" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\SearchUrl regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Search\ = "http://%68%6F%6D%65%70%61%67%65%2E%63%6F%6D\x01%00@%77%77%77%2E%65%2D%66%69%6E%64%65%72%2E%63%63/%73%65%61%72%63%68/" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Search\SearchAssistant = "http://%68%6F%6D%65%70%61%67%65%2E%63%6F%6D\x01%00@%77%77%77%2E%65%2D%66%69%6E%64%65%72%2E%63%63/%73%65%61%72%63%68/" regsvr32.exe Set value (str) \REGISTRY\USER\S-1-5-21-461973139-3212354679-1508698038-1000\Software\Microsoft\Internet Explorer\Search\ = "http://%68%6F%6D%65%70%61%67%65%2E%63%6F%6D\x01%00@%77%77%77%2E%65%2D%66%69%6E%64%65%72%2E%63%63/%73%65%61%72%63%68/" regsvr32.exe Set value (str) \REGISTRY\USER\S-1-5-21-461973139-3212354679-1508698038-1000\Software\Microsoft\Internet Explorer\Search\CustomizeSearch = "http://%68%6F%6D%65%70%61%67%65%2E%63%6F%6D\x01%00@%77%77%77%2E%65%2D%66%69%6E%64%65%72%2E%63%63/%73%65%61%72%63%68/" regsvr32.exe Set value (str) \REGISTRY\USER\S-1-5-21-461973139-3212354679-1508698038-1000\Software\Microsoft\Internet Explorer\Main\Search Bar = "http://%68%6F%6D%65%70%61%67%65%2E%63%6F%6D\x01%00@%77%77%77%2E%65%2D%66%69%6E%64%65%72%2E%63%63/%73%65%61%72%63%68/" regsvr32.exe Key created \REGISTRY\USER\S-1-5-21-461973139-3212354679-1508698038-1000\Software\Microsoft\Internet Explorer\SearchUrl regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Search regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\Search Bar = "http://%68%6F%6D%65%70%61%67%65%2E%63%6F%6D\x01%00@%77%77%77%2E%65%2D%66%69%6E%64%65%72%2E%63%63/%73%65%61%72%63%68/" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Search\CustomizeSearch = "http://%68%6F%6D%65%70%61%67%65%2E%63%6F%6D\x01%00@%77%77%77%2E%65%2D%66%69%6E%64%65%72%2E%63%63/%73%65%61%72%63%68/" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\SearchUrl\ = "http://%68%6F%6D%65%70%61%67%65%2E%63%6F%6D\x01%00@%77%77%77%2E%65%2D%66%69%6E%64%65%72%2E%63%63/%73%65%61%72%63%68/" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\Search Page = "http://%68%6F%6D%65%70%61%67%65%2E%63%6F%6D\x01%00@%77%77%77%2E%65%2D%66%69%6E%64%65%72%2E%63%63/%73%65%61%72%63%68/" regsvr32.exe Key created \REGISTRY\USER\S-1-5-21-461973139-3212354679-1508698038-1000\Software\Microsoft\Internet Explorer\Search regsvr32.exe - Modifies Internet Explorer start page 1 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-461973139-3212354679-1508698038-1000\Software\Microsoft\Internet Explorer\Main\Start Page = "http://%68%6F%6D%65%70%61%67%65%2E%63%6F%6D\x01%00@%77%77%77%2E%65%2D%66%69%6E%64%65%72%2E%63%63/%68%70/" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\Start Page = "http://%68%6F%6D%65%70%61%67%65%2E%63%6F%6D\x01%00@%77%77%77%2E%65%2D%66%69%6E%64%65%72%2E%63%63/%68%70/" regsvr32.exe - Modifies registry class 60 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{834261E1-DD97-4177-853B-C907E5D5BD6E}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\jaffacakes118_Trojan-Downloader.Win32.Small.oi.dll" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{834261E1-DD97-4177-853B-C907E5D5BD6E}\TypeLib regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{0B6EF17E-18E5-4449-86EA-64C82D596EAE}\TypeLib regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\AnalyzeIE.DOMPeek.1 regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{BD0022A3-A43F-4F44-B64F-53EA7575F097}\1.0\FLAGS regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\AnalyzeIE.DOMPeek\CLSID\ = "{834261E1-DD97-4177-853B-C907E5D5BD6E}" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{834261E1-DD97-4177-853B-C907E5D5BD6E}\VersionIndependentProgID regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{BD0022A3-A43F-4F44-B64F-53EA7575F097}\1.0\0\win32 regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{B1E68D42-02C4-465B-8368-5ED9B732E22D}\TypeLib\Version = "1.0" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{B1E68D42-02C4-465B-8368-5ED9B732E22D}\TypeLib\Version = "1.0" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{0B6EF17E-18E5-4449-86EA-64C82D596EAE}\ProxyStubClsid32 regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\AnalyzeIE.DOMPeek\CurVer regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{834261E1-DD97-4177-853B-C907E5D5BD6E}\ProgID\ = "AnalyzeIE.DOMPeek.1" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{834261E1-DD97-4177-853B-C907E5D5BD6E}\Programmable regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{BD0022A3-A43F-4F44-B64F-53EA7575F097}\1.0\ = "AnalyzeIE 1.0 Type Library" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{B1E68D42-02C4-465B-8368-5ED9B732E22D}\TypeLib\ = "{BD0022A3-A43F-4F44-B64F-53EA7575F097}" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{0B6EF17E-18E5-4449-86EA-64C82D596EAE}\TypeLib regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{0B6EF17E-18E5-4449-86EA-64C82D596EAE}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\AnalyzeIE.DOMPeek\CLSID regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{B1E68D42-02C4-465B-8368-5ED9B732E22D}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\AnalyzeIE.DOMPeek\ = "DOMPeek Class" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\AnalyzeIE.DOMPeek\CurVer\ = "AnalyzeIE.DOMPeek.1" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{834261E1-DD97-4177-853B-C907E5D5BD6E}\InprocServer32 regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{0B6EF17E-18E5-4449-86EA-64C82D596EAE}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\AnalyzeIE.DOMPeek.1\CLSID regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\AnalyzeIE.DOMPeek.1\CLSID\ = "{834261E1-DD97-4177-853B-C907E5D5BD6E}" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{834261E1-DD97-4177-853B-C907E5D5BD6E}\TypeLib\ = "{BD0022A3-A43F-4F44-B64F-53EA7575F097}" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{B1E68D42-02C4-465B-8368-5ED9B732E22D}\ = "IDocEventHandler" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{B1E68D42-02C4-465B-8368-5ED9B732E22D}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{0B6EF17E-18E5-4449-86EA-64C82D596EAE}\ = "IDOMPeek" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{0B6EF17E-18E5-4449-86EA-64C82D596EAE}\ProxyStubClsid32 regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{0B6EF17E-18E5-4449-86EA-64C82D596EAE}\TypeLib\Version = "1.0" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{834261E1-DD97-4177-853B-C907E5D5BD6E}\ = "DOMPeek Class" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{834261E1-DD97-4177-853B-C907E5D5BD6E}\ProgID regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{834261E1-DD97-4177-853B-C907E5D5BD6E}\VersionIndependentProgID\ = "AnalyzeIE.DOMPeek" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{BD0022A3-A43F-4F44-B64F-53EA7575F097}\1.0\HELPDIR\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{B1E68D42-02C4-465B-8368-5ED9B732E22D}\ProxyStubClsid32 regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{0B6EF17E-18E5-4449-86EA-64C82D596EAE}\TypeLib\ = "{BD0022A3-A43F-4F44-B64F-53EA7575F097}" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\AnalyzeIE.DOMPeek.1\ = "DOMPeek Class" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{BD0022A3-A43F-4F44-B64F-53EA7575F097}\1.0\HELPDIR regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{834261E1-DD97-4177-853B-C907E5D5BD6E}\InprocServer32\ThreadingModel = "Apartment" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{0B6EF17E-18E5-4449-86EA-64C82D596EAE}\TypeLib\Version = "1.0" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{0B6EF17E-18E5-4449-86EA-64C82D596EAE}\TypeLib\ = "{BD0022A3-A43F-4F44-B64F-53EA7575F097}" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{BD0022A3-A43F-4F44-B64F-53EA7575F097}\1.0\FLAGS\ = "0" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{B1E68D42-02C4-465B-8368-5ED9B732E22D}\TypeLib\ = "{BD0022A3-A43F-4F44-B64F-53EA7575F097}" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{834261E1-DD97-4177-853B-C907E5D5BD6E} regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{BD0022A3-A43F-4F44-B64F-53EA7575F097}\1.0\0\win32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\jaffacakes118_Trojan-Downloader.Win32.Small.oi.dll" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{B1E68D42-02C4-465B-8368-5ED9B732E22D} regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{B1E68D42-02C4-465B-8368-5ED9B732E22D}\ProxyStubClsid32 regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{B1E68D42-02C4-465B-8368-5ED9B732E22D}\TypeLib regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{0B6EF17E-18E5-4449-86EA-64C82D596EAE} regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{0B6EF17E-18E5-4449-86EA-64C82D596EAE}\ = "IDOMPeek" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{BD0022A3-A43F-4F44-B64F-53EA7575F097} regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{BD0022A3-A43F-4F44-B64F-53EA7575F097}\1.0 regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{0B6EF17E-18E5-4449-86EA-64C82D596EAE} regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{BD0022A3-A43F-4F44-B64F-53EA7575F097}\1.0\0 regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{B1E68D42-02C4-465B-8368-5ED9B732E22D}\TypeLib regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{B1E68D42-02C4-465B-8368-5ED9B732E22D} regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{B1E68D42-02C4-465B-8368-5ED9B732E22D}\ = "IDocEventHandler" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\AnalyzeIE.DOMPeek regsvr32.exe - Suspicious use of WriteProcessMemory 1 IoCs
description pid Process procid_target PID 824 wrote to memory of 2388 824 regsvr32.exe 89
Processes
-
C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan-Downloader.Win32.Small.oi.dll1⤵
- Suspicious use of WriteProcessMemory
PID:824 -
C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan-Downloader.Win32.Small.oi.dll2⤵
- Adds Run key to start application
- Installs/modifies Browser Helper Object
- System Location Discovery: System Language Discovery
- Modifies Internet Explorer settings
- Modifies Internet Explorer start page
- Modifies registry class
PID:2388
-