Analysis
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max time kernel
86s -
max time network
81s -
platform
windows7_x64 -
resource
win7 -
submitted
09-07-2020 09:53
Static task
static1
Behavioral task
behavioral1
Sample
yaca (2).dll
Resource
win7
windows7_x64
0 signatures
0 seconds
General
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Target
yaca (2).dll
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Size
196KB
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MD5
5a2ea810181d7bb18b403aa34bf18ad8
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SHA1
27b6d828de99f9457142b828f1ddda096ca6c162
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SHA256
ceafed22728ab72aa4a74dc2fc96d54b85ec0432ef0c97a4497075cc802109d3
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SHA512
f2b21218484eeea579bdcee66aacac7c254007db664c4a788250fb846eeb2891fe3b0102ce916236cb6aa5c5a0714991b978abd7f3074d6c426ae72ad81d5ce7
Malware Config
Signatures
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description ioc Process Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\LowRegistry iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\BrowserEmulation\LowMic iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\IETld\LowMic iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\InternetRegistry iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Main iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Main\FullScreen = "no" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Toolbar iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\GPU iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\MINIE\TabBandWidth = "500" iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\MINIE\TabBandWidth = "500" iexplore.exe Set value (data) \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\MFV = 01000000d08c9ddf0115d1118c7a00c04fc297eb010000001b0829a874ca164698fa08cb019bbab800000000020000000000106600000001000020000000f7d5b843f844014271cf63f16f6ec3397fcb2fc11206442ab1cafaace8404c12000000000e80000000020000200000004cb1992a35e885214c3dc84a28cca97ef5b087cd82f5bfb9a4cc17e3f70f166c900000005f0aa8d3713153e35920e4952d4172d00fc4c91923c7904fd7aac253a088a91cb7ff6ded65b696054a9bb6356152757ef23232dde59fb6955cb54ac2baa69d699fc0839a330f0f1e0db32c9dce63c674784ec0f52232bc331191f9fea2ab474e45a0a590ab4afcf56df5e749f78c6a420d17a14f27957dda680c65a82d5239accdc2c3f207b60251c4bc14308cc55f7c400000002d263e834b256d53f6c99a912ae555fd3c110edacff23b5da4e902ea44dbb07587134060bb719de139d350fd46356764bb10fa7c6ec3d5092af29a3457cc48d8 iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive\{31F6C581-C1CA-11EA-A718-5E3E1FB29FB8} = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\PageSetup iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Toolbar iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Main\FullScreen = "no" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\InternetRegistry iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Zoom iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\IETld\LowMic iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\IntelliForms iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\GPU iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\MINIE iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Main iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\LowRegistry iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\PageSetup iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Zoom iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\LowRegistry\DOMStorage iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Main IEXPLORE.EXE Set value (data) \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = 20a8feedd655d601 iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Main IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running" IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\BrowserEmulation\LowMic iexplore.exe Set value (data) \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb010000001b0829a874ca164698fa08cb019bbab800000000020000000000106600000001000020000000615acb405bf6996babf219f1d18a4bba05eeae5fe97f7346361d289be37f28c7000000000e8000000002000020000000bbc937a6086ecae4641be3cf86e29036ee87a6259990b84c0c8e3b3c2e702492200000000420fa7b0acbdefe815a6e28a6f4441db62fe2c399f6a2d7292f135a0835c2ab4000000041d0b43bb6562fa054cabee3cb923f8c69ca363a9e75e41351a494038a8dbfacb677dda4d24637c0fe280b540c2d8b77693affb2d95ee532101c45de96bca0dc iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive\{17177FC1-C1CA-11EA-A718-5E3E1FB29FB8} = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\IntelliForms iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\LowRegistry\DOMStorage iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\MINIE iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NTPFirstRun = "1" iexplore.exe -
Suspicious use of WriteProcessMemory 19 IoCs
description pid Process procid_target PID 1124 wrote to memory of 1204 1124 rundll32.exe 24 PID 1124 wrote to memory of 1204 1124 rundll32.exe 24 PID 1124 wrote to memory of 1204 1124 rundll32.exe 24 PID 1124 wrote to memory of 1204 1124 rundll32.exe 24 PID 1124 wrote to memory of 1204 1124 rundll32.exe 24 PID 1124 wrote to memory of 1204 1124 rundll32.exe 24 PID 1124 wrote to memory of 1204 1124 rundll32.exe 24 PID 296 wrote to memory of 1664 296 iexplore.exe 28 PID 296 wrote to memory of 1664 296 iexplore.exe 28 PID 296 wrote to memory of 1664 296 iexplore.exe 28 PID 296 wrote to memory of 1664 296 iexplore.exe 28 PID 296 wrote to memory of 2028 296 iexplore.exe 32 PID 296 wrote to memory of 2028 296 iexplore.exe 32 PID 296 wrote to memory of 2028 296 iexplore.exe 32 PID 296 wrote to memory of 2028 296 iexplore.exe 32 PID 2024 wrote to memory of 320 2024 iexplore.exe 34 PID 2024 wrote to memory of 320 2024 iexplore.exe 34 PID 2024 wrote to memory of 320 2024 iexplore.exe 34 PID 2024 wrote to memory of 320 2024 iexplore.exe 34 -
Suspicious use of SetWindowsHookEx 8 IoCs
pid Process 296 iexplore.exe 296 iexplore.exe 1664 IEXPLORE.EXE 1664 IEXPLORE.EXE 2024 iexplore.exe 2024 iexplore.exe 320 IEXPLORE.EXE 320 IEXPLORE.EXE -
Suspicious use of FindShellTrayWindow 2 IoCs
pid Process 296 iexplore.exe 2024 iexplore.exe -
Checks whether UAC is enabled 4 IoCs
description ioc Process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA IEXPLORE.EXE Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA iexplore.exe Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA IEXPLORE.EXE Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA iexplore.exe
Processes
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C:\Windows\system32\rundll32.exerundll32.exe "C:\Users\Admin\AppData\Local\Temp\yaca (2).dll",#11⤵
- Suspicious use of WriteProcessMemory
PID:1124 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe "C:\Users\Admin\AppData\Local\Temp\yaca (2).dll",#12⤵PID:1204
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C:\Program Files\Internet Explorer\iexplore.exe"C:\Program Files\Internet Explorer\iexplore.exe" -Embedding1⤵
- Modifies Internet Explorer settings
- Suspicious use of WriteProcessMemory
- Suspicious use of SetWindowsHookEx
- Suspicious use of FindShellTrayWindow
- Checks whether UAC is enabled
PID:296 -
C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:296 CREDAT:275457 /prefetch:22⤵
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
- Checks whether UAC is enabled
PID:1664
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C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:296 CREDAT:537609 /prefetch:22⤵PID:2028
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C:\Program Files\Internet Explorer\iexplore.exe"C:\Program Files\Internet Explorer\iexplore.exe" -Embedding1⤵
- Modifies Internet Explorer settings
- Suspicious use of WriteProcessMemory
- Suspicious use of SetWindowsHookEx
- Suspicious use of FindShellTrayWindow
- Checks whether UAC is enabled
PID:2024 -
C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2024 CREDAT:275457 /prefetch:22⤵
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
- Checks whether UAC is enabled
PID:320
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