Analysis
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max time kernel
117s -
max time network
118s -
platform
windows7_x64 -
resource
win7-20240708-en -
resource tags
arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system -
submitted
15-08-2024 17:39
Static task
static1
Behavioral task
behavioral1
Sample
b778d988c1488f76d50f8ff1cd1bf1a0N.dll
Resource
win7-20240708-en
General
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Target
b778d988c1488f76d50f8ff1cd1bf1a0N.dll
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Size
239KB
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MD5
b778d988c1488f76d50f8ff1cd1bf1a0
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SHA1
f077bebd347155e9ec5597a4a935ddf19534e37c
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SHA256
46951b0b1862936557aa8b0154ad81485eb20b60ff694568ff94f03009d2dc05
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SHA512
e5e165423b4f2858e97bb44ffcc0d5cbcd62880ff31bd1c92699bd2ecb3a8f9995fb0200cdf82fedf90cc3c8bbf6108a06699b208c36d83f2b9ccba99578e0ea
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SSDEEP
3072:i+W9sQxFt0A3Yx09SQ9N4PXbHcnzZzzZvPn2lQBV+UdE+rECWp7hK5uQ:jW7Vr3sIVNVN35LBV+UdvrEFp7hK1
Malware Config
Signatures
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Detects Floxif payload 1 IoCs
resource yara_rule behavioral1/files/0x00090000000120f9-1.dat floxif -
ACProtect 1.3x - 1.4x DLL software 1 IoCs
Detects file using ACProtect software.
resource yara_rule behavioral1/files/0x00090000000120f9-1.dat acprotect -
Loads dropped DLL 1 IoCs
pid Process 2076 regsvr32.exe -
Modifies system executable filetype association 2 TTPs 4 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shellex\ContextMenuHandlers\RUShellExt regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shellex\ContextMenuHandlers\RUShellExt\ = "{2C5515DC-2A7E-4BFD-B813-CACC2B685EB7}" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shellex\ContextMenuHandlers\RUShellExt regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shellex\ContextMenuHandlers\RUShellExt\ = "{2C5515DC-2A7E-4BFD-B813-CACC2B685EB7}" regsvr32.exe -
resource yara_rule behavioral1/files/0x00090000000120f9-1.dat upx behavioral1/memory/2076-3-0x0000000000260000-0x0000000000290000-memory.dmp upx behavioral1/memory/2076-5-0x0000000000260000-0x0000000000290000-memory.dmp upx -
Drops file in Program Files directory 1 IoCs
description ioc Process File created C:\Program Files\Common Files\System\symsrv.dll regsvr32.exe -
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 -
Modifies registry class 17 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{2C5515DC-2A7E-4BFD-B813-CACC2B685EB7}\InprocServer32 regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\AppID\{1D928D64-60D3-4FAC-B810-C4D9D8A680CF} regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\AppID\RUExt.DLL\AppID = "{1D928D64-60D3-4FAC-B810-C4D9D8A680CF}" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{2C5515DC-2A7E-4BFD-B813-CACC2B685EB7}\ = "RUShellExt Class" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{2C5515DC-2A7E-4BFD-B813-CACC2B685EB7}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\b778d988c1488f76d50f8ff1cd1bf1a0N.dll" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{2C5515DC-2A7E-4BFD-B813-CACC2B685EB7}\InprocServer32\ThreadingModel = "Apartment" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shellex\ContextMenuHandlers\RUShellExt\ = "{2C5515DC-2A7E-4BFD-B813-CACC2B685EB7}" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Folder\ShellEx\ContextMenuHandlers\RUShellExt\ = "{2C5515DC-2A7E-4BFD-B813-CACC2B685EB7}" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\AppID\{1D928D64-60D3-4FAC-B810-C4D9D8A680CF}\ = "RUExt" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Msi.Package\shellex\ContextMenuHandlers\RUShellExt\ = "{2C5515DC-2A7E-4BFD-B813-CACC2B685EB7}" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\AppID\RUExt.DLL regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{2C5515DC-2A7E-4BFD-B813-CACC2B685EB7} regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shellex\ContextMenuHandlers\RUShellExt regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Msi.Package\shellex\ContextMenuHandlers\RUShellExt regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shellex\ContextMenuHandlers\RUShellExt regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shellex\ContextMenuHandlers\RUShellExt\ = "{2C5515DC-2A7E-4BFD-B813-CACC2B685EB7}" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Folder\ShellEx\ContextMenuHandlers\RUShellExt regsvr32.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 2076 regsvr32.exe -
Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 2624 wrote to memory of 2076 2624 regsvr32.exe 30 PID 2624 wrote to memory of 2076 2624 regsvr32.exe 30 PID 2624 wrote to memory of 2076 2624 regsvr32.exe 30 PID 2624 wrote to memory of 2076 2624 regsvr32.exe 30 PID 2624 wrote to memory of 2076 2624 regsvr32.exe 30 PID 2624 wrote to memory of 2076 2624 regsvr32.exe 30 PID 2624 wrote to memory of 2076 2624 regsvr32.exe 30
Processes
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\b778d988c1488f76d50f8ff1cd1bf1a0N.dll1⤵
- Suspicious use of WriteProcessMemory
PID:2624 -
C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\b778d988c1488f76d50f8ff1cd1bf1a0N.dll2⤵
- Loads dropped DLL
- Modifies system executable filetype association
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
PID:2076
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
67KB
MD57574cf2c64f35161ab1292e2f532aabf
SHA114ba3fa927a06224dfe587014299e834def4644f
SHA256de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA5124db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab