Analysis
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max time kernel
135s -
max time network
158s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
27-11-2022 19:38
Behavioral task
behavioral1
Sample
ARP_ɫվ.url
Resource
win7-20221111-en
Behavioral task
behavioral2
Sample
ARP_ɫվ.url
Resource
win10v2004-20220812-en
Behavioral task
behavioral3
Sample
սʬͻ/FSMON.dll
Resource
win7-20220812-en
Behavioral task
behavioral4
Sample
սʬͻ/FSMON.dll
Resource
win10v2004-20220901-en
Behavioral task
behavioral5
Sample
սʬͻ/սʬͻ.exe
Resource
win7-20220901-en
Behavioral task
behavioral6
Sample
սʬͻ/սʬͻ.exe
Resource
win10v2004-20220901-en
Behavioral task
behavioral7
Sample
.url
Resource
win7-20220901-en
Behavioral task
behavioral8
Sample
.url
Resource
win10v2004-20221111-en
General
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Target
սʬͻ/FSMON.dll
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Size
808KB
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MD5
a64b6bd81946099304da6f3be9610a50
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SHA1
98daddca2610e275f3beddd56f29973c3605debc
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SHA256
e0695337213c971ffd19328928cf1b701e2cd89f6bba3235f1330a7057872058
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SHA512
e291265dd126753cae479045b8830ca31d57d14adb5a682fa4bb5c704b27109298eed5528a3d845e0635da00120fa9554173bfc2f00c1fd5f2b3f057346ea7d8
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SSDEEP
24576:1NxD6TO4LhtzHcfMqEbn+kZC9AQfCcKBdzIb3cz24:74TXLLHcbe+USo0bsz24
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
Processes:
rundll32Srv.exeDesktopLayer.exepid process 2496 rundll32Srv.exe 2128 DesktopLayer.exe -
Processes:
resource yara_rule C:\Windows\SysWOW64\rundll32Srv.exe upx C:\Windows\SysWOW64\rundll32Srv.exe upx behavioral4/memory/2496-138-0x0000000000400000-0x000000000042E000-memory.dmp upx C:\Program Files (x86)\Microsoft\DesktopLayer.exe upx C:\Program Files (x86)\Microsoft\DesktopLayer.exe upx behavioral4/memory/2128-142-0x0000000000400000-0x000000000042E000-memory.dmp upx -
Drops file in System32 directory 1 IoCs
Processes:
rundll32.exedescription ioc process File created C:\Windows\SysWOW64\rundll32Srv.exe rundll32.exe -
Drops file in Program Files directory 3 IoCs
Processes:
rundll32Srv.exedescription ioc process File opened for modification C:\Program Files (x86)\Microsoft\DesktopLayer.exe rundll32Srv.exe File opened for modification C:\Program Files (x86)\Microsoft\pxE842.tmp rundll32Srv.exe File created C:\Program Files (x86)\Microsoft\DesktopLayer.exe rundll32Srv.exe -
Processes:
iexplore.exeIEXPLORE.EXEdescription ioc process Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\ iexplore.exe Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Internet Explorer\DomainSuggestion iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "705039993" IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "30999393" IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "705039993" IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion iexplore.exe Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames iexplore.exe Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\ iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Internet Explorer\Main IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "30999393" IEXPLORE.EXE Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "376429311" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch iexplore.exe Set value (data) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000 iexplore.exe Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Internet Explorer\VersionManager IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLLowDateTime = "1251635200" IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLHighDateTime = "50" IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Internet Explorer\Main iexplore.exe Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{4B2E3715-6F54-11ED-A0EE-E6C35CACCF0B} = "0" iexplore.exe -
Suspicious behavior: EnumeratesProcesses 8 IoCs
Processes:
DesktopLayer.exepid process 2128 DesktopLayer.exe 2128 DesktopLayer.exe 2128 DesktopLayer.exe 2128 DesktopLayer.exe 2128 DesktopLayer.exe 2128 DesktopLayer.exe 2128 DesktopLayer.exe 2128 DesktopLayer.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
iexplore.exepid process 3896 iexplore.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
Processes:
iexplore.exepid process 3896 iexplore.exe -
Suspicious use of SetWindowsHookEx 6 IoCs
Processes:
iexplore.exeIEXPLORE.EXEpid process 3896 iexplore.exe 3896 iexplore.exe 4884 IEXPLORE.EXE 4884 IEXPLORE.EXE 4884 IEXPLORE.EXE 4884 IEXPLORE.EXE -
Suspicious use of WriteProcessMemory 14 IoCs
Processes:
rundll32.exerundll32.exerundll32Srv.exeDesktopLayer.exeiexplore.exedescription pid process target process PID 1836 wrote to memory of 1496 1836 rundll32.exe rundll32.exe PID 1836 wrote to memory of 1496 1836 rundll32.exe rundll32.exe PID 1836 wrote to memory of 1496 1836 rundll32.exe rundll32.exe PID 1496 wrote to memory of 2496 1496 rundll32.exe rundll32Srv.exe PID 1496 wrote to memory of 2496 1496 rundll32.exe rundll32Srv.exe PID 1496 wrote to memory of 2496 1496 rundll32.exe rundll32Srv.exe PID 2496 wrote to memory of 2128 2496 rundll32Srv.exe DesktopLayer.exe PID 2496 wrote to memory of 2128 2496 rundll32Srv.exe DesktopLayer.exe PID 2496 wrote to memory of 2128 2496 rundll32Srv.exe DesktopLayer.exe PID 2128 wrote to memory of 3896 2128 DesktopLayer.exe iexplore.exe PID 2128 wrote to memory of 3896 2128 DesktopLayer.exe iexplore.exe PID 3896 wrote to memory of 4884 3896 iexplore.exe IEXPLORE.EXE PID 3896 wrote to memory of 4884 3896 iexplore.exe IEXPLORE.EXE PID 3896 wrote to memory of 4884 3896 iexplore.exe IEXPLORE.EXE
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\սʬͻ\FSMON.dll,#11⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\սʬͻ\FSMON.dll,#12⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32Srv.exeC:\Windows\SysWOW64\rundll32Srv.exe3⤵
- Executes dropped EXE
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
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C:\Program Files (x86)\Microsoft\DesktopLayer.exe"C:\Program Files (x86)\Microsoft\DesktopLayer.exe"4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Program Files\Internet Explorer\iexplore.exe"C:\Program Files\Internet Explorer\iexplore.exe"5⤵
- Modifies Internet Explorer settings
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:3896 CREDAT:17410 /prefetch:26⤵
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Program Files (x86)\Microsoft\DesktopLayer.exeFilesize
55KB
MD5ff5e1f27193ce51eec318714ef038bef
SHA1b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6
SHA256fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320
SHA512c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a
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C:\Program Files (x86)\Microsoft\DesktopLayer.exeFilesize
55KB
MD5ff5e1f27193ce51eec318714ef038bef
SHA1b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6
SHA256fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320
SHA512c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a
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C:\Windows\SysWOW64\rundll32Srv.exeFilesize
55KB
MD5ff5e1f27193ce51eec318714ef038bef
SHA1b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6
SHA256fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320
SHA512c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a
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C:\Windows\SysWOW64\rundll32Srv.exeFilesize
55KB
MD5ff5e1f27193ce51eec318714ef038bef
SHA1b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6
SHA256fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320
SHA512c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a
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memory/1496-133-0x0000000000000000-mapping.dmp
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memory/1496-137-0x0000000010000000-0x00000000100D2000-memory.dmpFilesize
840KB
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memory/1496-143-0x0000000010000000-0x00000000100D2000-memory.dmpFilesize
840KB
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memory/2128-139-0x0000000000000000-mapping.dmp
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memory/2128-142-0x0000000000400000-0x000000000042E000-memory.dmpFilesize
184KB
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memory/2496-134-0x0000000000000000-mapping.dmp
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memory/2496-138-0x0000000000400000-0x000000000042E000-memory.dmpFilesize
184KB