Analysis
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max time kernel
133s -
max time network
135s -
platform
windows10_x64 -
resource
win10v20210408 -
submitted
16-05-2021 05:40
Static task
static1
Behavioral task
behavioral1
Sample
b709c7ff171266b05d8242d56cd0496bdb1f2406bb44526e74f445e8a764c29c.dll
Resource
win7v20210410
General
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Target
b709c7ff171266b05d8242d56cd0496bdb1f2406bb44526e74f445e8a764c29c.dll
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Size
260KB
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MD5
055467c6d6254905484fa72179b94c81
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SHA1
02e0e6b226c48e80b0be7adf32a3bb225438f6a5
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SHA256
b709c7ff171266b05d8242d56cd0496bdb1f2406bb44526e74f445e8a764c29c
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SHA512
9a73bf6c598447a1c2727b6733fcabc385912d0b89d76bab54a70e2a1e03235056f7d3e096022c57881ee6ca6f2fb6c108f75946dfa9265d2b1447b9e522f119
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
Processes:
rundll32Srv.exeDesktopLayer.exepid process 2508 rundll32Srv.exe 2760 DesktopLayer.exe -
Processes:
resource yara_rule C:\Windows\SysWOW64\rundll32Srv.exe upx C:\Windows\SysWOW64\rundll32Srv.exe upx behavioral2/memory/2508-119-0x0000000000400000-0x000000000042E000-memory.dmp upx C:\Program Files (x86)\Microsoft\DesktopLayer.exe upx C:\Program Files (x86)\Microsoft\DesktopLayer.exe 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 created C:\Program Files (x86)\Microsoft\DesktopLayer.exe rundll32Srv.exe File opened for modification C:\Program Files (x86)\Microsoft\DesktopLayer.exe rundll32Srv.exe File opened for modification C:\Program Files (x86)\Microsoft\px9560.tmp rundll32Srv.exe -
Processes:
iexplore.exeIEXPLORE.EXEdescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Internet Explorer\Main\FullScreen = "no" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "327371105" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Internet Explorer\FlipAhead\NextUpdateDate = "327371274" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Internet Explorer\Main iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Internet Explorer\DomainSuggestion iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Internet Explorer\FlipAhead iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Internet Explorer\HistoryJournalCertificate iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive\{F1B35EDE-B6A1-11EB-B2DB-F634F559A0EA} = "0" iexplore.exe Set value (data) \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000 iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Internet Explorer\Main IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Internet Explorer\HistoryJournalCertificate\NextUpdateDate = "327371162" iexplore.exe -
Suspicious behavior: EnumeratesProcesses 8 IoCs
Processes:
DesktopLayer.exepid process 2760 DesktopLayer.exe 2760 DesktopLayer.exe 2760 DesktopLayer.exe 2760 DesktopLayer.exe 2760 DesktopLayer.exe 2760 DesktopLayer.exe 2760 DesktopLayer.exe 2760 DesktopLayer.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
iexplore.exepid process 3028 iexplore.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
Processes:
iexplore.exepid process 3028 iexplore.exe -
Suspicious use of SetWindowsHookEx 6 IoCs
Processes:
iexplore.exeIEXPLORE.EXEpid process 3028 iexplore.exe 3028 iexplore.exe 2928 IEXPLORE.EXE 2928 IEXPLORE.EXE 2928 IEXPLORE.EXE 2928 IEXPLORE.EXE -
Suspicious use of WriteProcessMemory 14 IoCs
Processes:
rundll32.exerundll32.exerundll32Srv.exeDesktopLayer.exeiexplore.exedescription pid process target process PID 508 wrote to memory of 3292 508 rundll32.exe rundll32.exe PID 508 wrote to memory of 3292 508 rundll32.exe rundll32.exe PID 508 wrote to memory of 3292 508 rundll32.exe rundll32.exe PID 3292 wrote to memory of 2508 3292 rundll32.exe rundll32Srv.exe PID 3292 wrote to memory of 2508 3292 rundll32.exe rundll32Srv.exe PID 3292 wrote to memory of 2508 3292 rundll32.exe rundll32Srv.exe PID 2508 wrote to memory of 2760 2508 rundll32Srv.exe DesktopLayer.exe PID 2508 wrote to memory of 2760 2508 rundll32Srv.exe DesktopLayer.exe PID 2508 wrote to memory of 2760 2508 rundll32Srv.exe DesktopLayer.exe PID 2760 wrote to memory of 3028 2760 DesktopLayer.exe iexplore.exe PID 2760 wrote to memory of 3028 2760 DesktopLayer.exe iexplore.exe PID 3028 wrote to memory of 2928 3028 iexplore.exe IEXPLORE.EXE PID 3028 wrote to memory of 2928 3028 iexplore.exe IEXPLORE.EXE PID 3028 wrote to memory of 2928 3028 iexplore.exe IEXPLORE.EXE
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\b709c7ff171266b05d8242d56cd0496bdb1f2406bb44526e74f445e8a764c29c.dll,#11⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\b709c7ff171266b05d8242d56cd0496bdb1f2406bb44526e74f445e8a764c29c.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:3028 CREDAT:82945 /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.exeMD5
ff5e1f27193ce51eec318714ef038bef
SHA1b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6
SHA256fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320
SHA512c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a
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C:\Program Files (x86)\Microsoft\DesktopLayer.exeMD5
ff5e1f27193ce51eec318714ef038bef
SHA1b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6
SHA256fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320
SHA512c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a
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C:\Windows\SysWOW64\rundll32Srv.exeMD5
ff5e1f27193ce51eec318714ef038bef
SHA1b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6
SHA256fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320
SHA512c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a
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C:\Windows\SysWOW64\rundll32Srv.exeMD5
ff5e1f27193ce51eec318714ef038bef
SHA1b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6
SHA256fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320
SHA512c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a
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memory/2508-115-0x0000000000000000-mapping.dmp
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memory/2508-118-0x00000000001E0000-0x00000000001EF000-memory.dmpFilesize
60KB
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memory/2508-119-0x0000000000400000-0x000000000042E000-memory.dmpFilesize
184KB
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memory/2760-120-0x0000000000000000-mapping.dmp
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memory/2760-123-0x0000000000500000-0x0000000000501000-memory.dmpFilesize
4KB
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memory/2928-128-0x0000000000000000-mapping.dmp
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memory/3028-124-0x0000000000000000-mapping.dmp
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memory/3028-127-0x00007FFAA2FD0000-0x00007FFAA303B000-memory.dmpFilesize
428KB
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memory/3292-114-0x0000000000000000-mapping.dmp