Overview
overview
10Static
static
yymshdsdsd...Fx.dll
windows7-x64
1yymshdsdsd...Fx.dll
windows10-2004-x64
1yymshdsdsd...er.dll
windows7-x64
10yymshdsdsd...er.dll
windows10-2004-x64
10yymshdsdsd...??.exe
windows7-x64
10yymshdsdsd...??.exe
windows10-2004-x64
10yymshdsdsd...jd.dll
windows7-x64
10yymshdsdsd...jd.dll
windows10-2004-x64
10yymshdsdsd...sa.dll
windows7-x64
1yymshdsdsd...sa.dll
windows10-2004-x64
1yymshdsdsd...dc.dll
windows7-x64
1yymshdsdsd...dc.dll
windows10-2004-x64
3Analysis
-
max time kernel
106s -
max time network
143s -
platform
windows7_x64 -
resource
win7-20220715-en -
resource tags
arch:x64arch:x86image:win7-20220715-enlocale:en-usos:windows7-x64system -
submitted
18-07-2022 18:19
Static task
static1
Behavioral task
behavioral1
Sample
yymshdsdsdrj_gr/FluorineFx.dll
Resource
win7-20220715-en
Behavioral task
behavioral2
Sample
yymshdsdsdrj_gr/FluorineFx.dll
Resource
win10v2004-20220414-en
Behavioral task
behavioral3
Sample
yymshdsdsdrj_gr/Net7Cracker.dll
Resource
win7-20220718-en
Behavioral task
behavioral4
Sample
yymshdsdsdrj_gr/Net7Cracker.dll
Resource
win10v2004-20220414-en
Behavioral task
behavioral5
Sample
yymshdsdsdrj_gr/YY???????.exe
Resource
win7-20220718-en
Behavioral task
behavioral6
Sample
yymshdsdsdrj_gr/YY???????.exe
Resource
win10v2004-20220718-en
Behavioral task
behavioral7
Sample
yymshdsdsdrj_gr/pljd.dll
Resource
win7-20220715-en
Behavioral task
behavioral8
Sample
yymshdsdsdrj_gr/pljd.dll
Resource
win10v2004-20220718-en
Behavioral task
behavioral9
Sample
yymshdsdsdrj_gr/rsa.dll
Resource
win7-20220715-en
Behavioral task
behavioral10
Sample
yymshdsdsdrj_gr/rsa.dll
Resource
win10v2004-20220414-en
Behavioral task
behavioral11
Sample
yymshdsdsdrj_gr/udc.dll
Resource
win7-20220718-en
Behavioral task
behavioral12
Sample
yymshdsdsdrj_gr/udc.dll
Resource
win10v2004-20220414-en
General
-
Target
yymshdsdsdrj_gr/pljd.dll
-
Size
3.2MB
-
MD5
bcdb5cecfbc0beda561dbeb150eb08df
-
SHA1
2714308e995db1a5ba77696b321b8fb72650e5e3
-
SHA256
7c17f25b8621980b6a84856578923fc1f4a37ff42eb7e8626308dc49ad7d6d03
-
SHA512
a630f4fa700d4057b680c335d0ab33fea518284cd076c085b33506c9f712b24f0deadf15e393c249f05efde244edddb6a1a36a99cedc4342de5d628b2da7b43d
Malware Config
Signatures
-
Executes dropped EXE 2 IoCs
Processes:
rundll32Srv.exeDesktopLayer.exepid process 1968 rundll32Srv.exe 2016 DesktopLayer.exe -
Processes:
resource yara_rule \Windows\SysWOW64\rundll32Srv.exe upx C:\Windows\SysWOW64\rundll32Srv.exe upx C:\Windows\SysWOW64\rundll32Srv.exe upx \Program Files (x86)\Microsoft\DesktopLayer.exe upx C:\Program Files (x86)\Microsoft\DesktopLayer.exe upx behavioral7/memory/1968-65-0x0000000000400000-0x000000000042E000-memory.dmp upx C:\Program Files (x86)\Microsoft\DesktopLayer.exe upx behavioral7/memory/2016-68-0x0000000000400000-0x000000000042E000-memory.dmp upx -
Loads dropped DLL 2 IoCs
Processes:
rundll32.exerundll32Srv.exepid process 1148 rundll32.exe 1968 rundll32Srv.exe -
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\px4F1.tmp rundll32Srv.exe File created C:\Program Files (x86)\Microsoft\DesktopLayer.exe rundll32Srv.exe File opened for modification C:\Program Files (x86)\Microsoft\DesktopLayer.exe rundll32Srv.exe -
Program crash 1 IoCs
Processes:
WerFault.exepid pid_target process target process 112 1148 WerFault.exe rundll32.exe -
Processes:
iexplore.exeIEXPLORE.EXEdescription ioc process Set value (int) \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0" iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\Toolbar iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\InternetRegistry iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\IETld\LowMic iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\Zoom iexplore.exe Set value (data) \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000 iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\Main iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\PageSetup iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive\{85BDA411-06C7-11ED-B318-E2ADD9BA1437} = "0" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\IntelliForms iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\Main IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\ iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\DomainSuggestion iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "364933935" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\LowRegistry iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\Main\FullScreen = "no" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\GPU iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\LowRegistry\DOMStorage iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\BrowserEmulation\LowMic iexplore.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
DesktopLayer.exepid process 2016 DesktopLayer.exe 2016 DesktopLayer.exe 2016 DesktopLayer.exe 2016 DesktopLayer.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
Processes:
iexplore.exepid process 1616 iexplore.exe -
Suspicious use of SetWindowsHookEx 6 IoCs
Processes:
iexplore.exeIEXPLORE.EXEpid process 1616 iexplore.exe 1616 iexplore.exe 1716 IEXPLORE.EXE 1716 IEXPLORE.EXE 1716 IEXPLORE.EXE 1716 IEXPLORE.EXE -
Suspicious use of WriteProcessMemory 27 IoCs
Processes:
rundll32.exerundll32.exerundll32Srv.exeDesktopLayer.exeiexplore.exedescription pid process target process PID 2024 wrote to memory of 1148 2024 rundll32.exe rundll32.exe PID 2024 wrote to memory of 1148 2024 rundll32.exe rundll32.exe PID 2024 wrote to memory of 1148 2024 rundll32.exe rundll32.exe PID 2024 wrote to memory of 1148 2024 rundll32.exe rundll32.exe PID 2024 wrote to memory of 1148 2024 rundll32.exe rundll32.exe PID 2024 wrote to memory of 1148 2024 rundll32.exe rundll32.exe PID 2024 wrote to memory of 1148 2024 rundll32.exe rundll32.exe PID 1148 wrote to memory of 1968 1148 rundll32.exe rundll32Srv.exe PID 1148 wrote to memory of 1968 1148 rundll32.exe rundll32Srv.exe PID 1148 wrote to memory of 1968 1148 rundll32.exe rundll32Srv.exe PID 1148 wrote to memory of 1968 1148 rundll32.exe rundll32Srv.exe PID 1148 wrote to memory of 112 1148 rundll32.exe WerFault.exe PID 1148 wrote to memory of 112 1148 rundll32.exe WerFault.exe PID 1148 wrote to memory of 112 1148 rundll32.exe WerFault.exe PID 1148 wrote to memory of 112 1148 rundll32.exe WerFault.exe PID 1968 wrote to memory of 2016 1968 rundll32Srv.exe DesktopLayer.exe PID 1968 wrote to memory of 2016 1968 rundll32Srv.exe DesktopLayer.exe PID 1968 wrote to memory of 2016 1968 rundll32Srv.exe DesktopLayer.exe PID 1968 wrote to memory of 2016 1968 rundll32Srv.exe DesktopLayer.exe PID 2016 wrote to memory of 1616 2016 DesktopLayer.exe iexplore.exe PID 2016 wrote to memory of 1616 2016 DesktopLayer.exe iexplore.exe PID 2016 wrote to memory of 1616 2016 DesktopLayer.exe iexplore.exe PID 2016 wrote to memory of 1616 2016 DesktopLayer.exe iexplore.exe PID 1616 wrote to memory of 1716 1616 iexplore.exe IEXPLORE.EXE PID 1616 wrote to memory of 1716 1616 iexplore.exe IEXPLORE.EXE PID 1616 wrote to memory of 1716 1616 iexplore.exe IEXPLORE.EXE PID 1616 wrote to memory of 1716 1616 iexplore.exe IEXPLORE.EXE
Processes
-
C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\yymshdsdsdrj_gr\pljd.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:2024 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\yymshdsdsdrj_gr\pljd.dll,#12⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:1148 -
C:\Windows\SysWOW64\rundll32Srv.exeC:\Windows\SysWOW64\rundll32Srv.exe3⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:1968 -
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
PID:2016 -
C:\Program Files\Internet Explorer\iexplore.exe"C:\Program Files\Internet Explorer\iexplore.exe"5⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1616 -
C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1616 CREDAT:275457 /prefetch:26⤵
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:1716 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1148 -s 2403⤵
- Program crash
PID:112
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
-
Filesize
55KB
MD5ff5e1f27193ce51eec318714ef038bef
SHA1b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6
SHA256fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320
SHA512c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a
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Filesize
55KB
MD5ff5e1f27193ce51eec318714ef038bef
SHA1b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6
SHA256fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320
SHA512c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a
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Filesize
602B
MD5b8b51786ce006af3ab9128a0bd237176
SHA124f5fe72ccb9a84d305fdf7d13c0854ab3e0af05
SHA2567eddc9f6499d99070c46627035750f3db79a78272b8a6635f6d64c22a506f594
SHA51282e21b0324d8cda0df794413a8816ff6454245def6e271e0aaac3003816f5b9d74fb2fb7d592f86d0975c51cd02af4348b4f9b2cb329af7a4fa60271a99505cf
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Filesize
55KB
MD5ff5e1f27193ce51eec318714ef038bef
SHA1b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6
SHA256fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320
SHA512c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a
-
Filesize
55KB
MD5ff5e1f27193ce51eec318714ef038bef
SHA1b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6
SHA256fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320
SHA512c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a
-
Filesize
55KB
MD5ff5e1f27193ce51eec318714ef038bef
SHA1b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6
SHA256fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320
SHA512c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a
-
Filesize
55KB
MD5ff5e1f27193ce51eec318714ef038bef
SHA1b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6
SHA256fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320
SHA512c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a