Analysis
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max time kernel
15s -
max time network
141s -
platform
windows7_x64 -
resource
win7-20231215-en -
resource tags
arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system -
submitted
25/12/2023, 23:11
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
42666e61f8c187a3e1881f9fcf99c508.dll
Resource
win7-20231215-en
11 signatures
150 seconds
General
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Target
42666e61f8c187a3e1881f9fcf99c508.dll
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Size
392KB
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MD5
42666e61f8c187a3e1881f9fcf99c508
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SHA1
5d92eacf49b4a501190caaa2b62be404bcc56983
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SHA256
5c2c5645b8423fefc02c2fc73a0d24a0a18d3258c64a7ba39cbee1691c8f1708
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SHA512
c478c719e2d93eea72e462a899e4b7252e554742f563a3845da5725543789870572e72306eb9df345e4596d1a139dc7abd0e84b321edba11ece4eba8e194f9a5
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SSDEEP
6144:BdSOvikWQ4/nL4+sEBC6mywRw/YgnX+I9ABFe:fikWbj5sEBCTywiKIiBFe
Malware Config
Signatures
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Modifies WinLogon for persistence 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "userinit.exe,c:\\program files (x86)\\microsoft\\watermark.exe" svchost.exe -
Executes dropped EXE 6 IoCs
pid Process 2672 rundll32mgr.exe 2844 rundll32mgrmgr.exe 2956 WaterMark.exe 2952 WaterMark.exe 2868 WaterMarkmgr.exe 1948 WaterMark.exe -
Loads dropped DLL 12 IoCs
pid Process 2156 rundll32.exe 2156 rundll32.exe 2672 rundll32mgr.exe 2672 rundll32mgr.exe 2672 rundll32mgr.exe 2844 rundll32mgrmgr.exe 2672 rundll32mgr.exe 2844 rundll32mgrmgr.exe 2956 WaterMark.exe 2956 WaterMark.exe 2868 WaterMarkmgr.exe 2868 WaterMarkmgr.exe -
resource yara_rule behavioral1/memory/2672-20-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral1/memory/2672-30-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral1/memory/2844-32-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral1/memory/2844-37-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral1/memory/2956-67-0x0000000000120000-0x0000000000157000-memory.dmp upx behavioral1/memory/2868-71-0x0000000000400000-0x0000000000437000-memory.dmp upx behavioral1/memory/2956-63-0x0000000000120000-0x0000000000157000-memory.dmp upx behavioral1/memory/2868-82-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral1/memory/1948-90-0x0000000000400000-0x0000000000464000-memory.dmp upx behavioral1/memory/1948-99-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral1/memory/2956-86-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral1/memory/2952-115-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral1/memory/2956-145-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral1/memory/1948-156-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral1/memory/2672-41-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral1/memory/2844-34-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral1/memory/2844-27-0x0000000000400000-0x0000000000437000-memory.dmp upx behavioral1/memory/2672-26-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral1/memory/2672-23-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral1/memory/2952-164-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral1/memory/1948-421-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral1/memory/2956-423-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral1/memory/2952-443-0x0000000000400000-0x0000000000421000-memory.dmp upx -
Drops file in System32 directory 4 IoCs
description ioc Process File created C:\Windows\SysWOW64\rundll32mgr.exe rundll32.exe File created C:\Windows\SysWOW64\rundll32mgrmgr.exe rundll32mgr.exe File created C:\Windows\SysWOW64\dmlconf.dat svchost.exe File opened for modification C:\Windows\SysWOW64\dmlconf.dat svchost.exe -
Drops file in Program Files directory 15 IoCs
description ioc Process File created C:\Program Files (x86)\Microsoft\WaterMark.exe rundll32mgrmgr.exe File created C:\Program Files (x86)\Microsoft\WaterMarkmgr.exe WaterMark.exe File opened for modification C:\Program Files (x86)\Microsoft\px64FA.tmp WaterMarkmgr.exe File created C:\Program Files (x86)\Microsoft\WaterMark.exe WaterMarkmgr.exe File opened for modification C:\Program Files (x86)\Microsoft\px624C.tmp rundll32mgr.exe File opened for modification C:\Program Files\7-Zip\7-zip.dll svchost.exe File opened for modification C:\Program Files\7-Zip\7-zip32.dll svchost.exe File opened for modification C:\Program Files\7-Zip\7z.exe svchost.exe File created C:\Program Files (x86)\Microsoft\WaterMark.exe rundll32mgr.exe File created C:\Program Files (x86)\Microsoft\WaterMarkmgr.exe WaterMark.exe File created C:\Program Files (x86)\Microsoft\WaterMarkmgr.exe WaterMark.exe File opened for modification C:\Program Files (x86)\Microsoft\WaterMark.exe svchost.exe File opened for modification C:\Program Files (x86)\Microsoft\px624C.tmp rundll32mgrmgr.exe File opened for modification C:\Program Files\7-Zip\7z.dll svchost.exe File opened for modification C:\Program Files (x86)\Microsoft\WaterMark.exe rundll32mgr.exe -
Suspicious behavior: EnumeratesProcesses 25 IoCs
pid Process 2956 WaterMark.exe 2956 WaterMark.exe 1948 WaterMark.exe 1948 WaterMark.exe 2952 WaterMark.exe 2952 WaterMark.exe 2956 WaterMark.exe 1948 WaterMark.exe 1948 WaterMark.exe 2956 WaterMark.exe 1948 WaterMark.exe 2956 WaterMark.exe 2956 WaterMark.exe 1948 WaterMark.exe 2956 WaterMark.exe 2956 WaterMark.exe 1948 WaterMark.exe 1948 WaterMark.exe 2952 WaterMark.exe 2952 WaterMark.exe 2952 WaterMark.exe 2952 WaterMark.exe 2452 svchost.exe 2952 WaterMark.exe 2952 WaterMark.exe -
Suspicious use of AdjustPrivilegeToken 5 IoCs
description pid Process Token: SeDebugPrivilege 2956 WaterMark.exe Token: SeDebugPrivilege 1948 WaterMark.exe Token: SeDebugPrivilege 2952 WaterMark.exe Token: SeDebugPrivilege 2452 svchost.exe Token: SeDebugPrivilege 2368 svchost.exe -
Suspicious use of UnmapMainImage 6 IoCs
pid Process 2672 rundll32mgr.exe 2844 rundll32mgrmgr.exe 2952 WaterMark.exe 2956 WaterMark.exe 2868 WaterMarkmgr.exe 1948 WaterMark.exe -
Suspicious use of WriteProcessMemory 64 IoCs
description pid Process procid_target PID 2512 wrote to memory of 2156 2512 rundll32.exe 16 PID 2512 wrote to memory of 2156 2512 rundll32.exe 16 PID 2512 wrote to memory of 2156 2512 rundll32.exe 16 PID 2512 wrote to memory of 2156 2512 rundll32.exe 16 PID 2512 wrote to memory of 2156 2512 rundll32.exe 16 PID 2512 wrote to memory of 2156 2512 rundll32.exe 16 PID 2512 wrote to memory of 2156 2512 rundll32.exe 16 PID 2156 wrote to memory of 2672 2156 rundll32.exe 28 PID 2156 wrote to memory of 2672 2156 rundll32.exe 28 PID 2156 wrote to memory of 2672 2156 rundll32.exe 28 PID 2156 wrote to memory of 2672 2156 rundll32.exe 28 PID 2672 wrote to memory of 2844 2672 rundll32mgr.exe 27 PID 2672 wrote to memory of 2844 2672 rundll32mgr.exe 27 PID 2672 wrote to memory of 2844 2672 rundll32mgr.exe 27 PID 2672 wrote to memory of 2844 2672 rundll32mgr.exe 27 PID 2672 wrote to memory of 2956 2672 rundll32mgr.exe 26 PID 2672 wrote to memory of 2956 2672 rundll32mgr.exe 26 PID 2672 wrote to memory of 2956 2672 rundll32mgr.exe 26 PID 2672 wrote to memory of 2956 2672 rundll32mgr.exe 26 PID 2844 wrote to memory of 2952 2844 rundll32mgrmgr.exe 25 PID 2844 wrote to memory of 2952 2844 rundll32mgrmgr.exe 25 PID 2844 wrote to memory of 2952 2844 rundll32mgrmgr.exe 25 PID 2844 wrote to memory of 2952 2844 rundll32mgrmgr.exe 25 PID 2956 wrote to memory of 2868 2956 WaterMark.exe 24 PID 2956 wrote to memory of 2868 2956 WaterMark.exe 24 PID 2956 wrote to memory of 2868 2956 WaterMark.exe 24 PID 2956 wrote to memory of 2868 2956 WaterMark.exe 24 PID 2868 wrote to memory of 1948 2868 WaterMarkmgr.exe 23 PID 2868 wrote to memory of 1948 2868 WaterMarkmgr.exe 23 PID 2868 wrote to memory of 1948 2868 WaterMarkmgr.exe 23 PID 2868 wrote to memory of 1948 2868 WaterMarkmgr.exe 23 PID 2956 wrote to memory of 2920 2956 WaterMark.exe 20 PID 2956 wrote to memory of 2920 2956 WaterMark.exe 20 PID 1948 wrote to memory of 1760 1948 WaterMark.exe 21 PID 2956 wrote to memory of 2920 2956 WaterMark.exe 20 PID 2956 wrote to memory of 2920 2956 WaterMark.exe 20 PID 1948 wrote to memory of 1760 1948 WaterMark.exe 21 PID 1948 wrote to memory of 1760 1948 WaterMark.exe 21 PID 1948 wrote to memory of 1760 1948 WaterMark.exe 21 PID 2956 wrote to memory of 2920 2956 WaterMark.exe 20 PID 2952 wrote to memory of 1644 2952 WaterMark.exe 22 PID 1948 wrote to memory of 1760 1948 WaterMark.exe 21 PID 2956 wrote to memory of 2920 2956 WaterMark.exe 20 PID 2956 wrote to memory of 2920 2956 WaterMark.exe 20 PID 2956 wrote to memory of 2920 2956 WaterMark.exe 20 PID 2956 wrote to memory of 2920 2956 WaterMark.exe 20 PID 2956 wrote to memory of 2920 2956 WaterMark.exe 20 PID 1948 wrote to memory of 1760 1948 WaterMark.exe 21 PID 1948 wrote to memory of 1760 1948 WaterMark.exe 21 PID 1948 wrote to memory of 1760 1948 WaterMark.exe 21 PID 1948 wrote to memory of 1760 1948 WaterMark.exe 21 PID 1948 wrote to memory of 1760 1948 WaterMark.exe 21 PID 2952 wrote to memory of 1644 2952 WaterMark.exe 22 PID 2952 wrote to memory of 1644 2952 WaterMark.exe 22 PID 2952 wrote to memory of 1644 2952 WaterMark.exe 22 PID 2952 wrote to memory of 1644 2952 WaterMark.exe 22 PID 2952 wrote to memory of 1644 2952 WaterMark.exe 22 PID 2952 wrote to memory of 1644 2952 WaterMark.exe 22 PID 2952 wrote to memory of 1644 2952 WaterMark.exe 22 PID 2952 wrote to memory of 1644 2952 WaterMark.exe 22 PID 2952 wrote to memory of 1644 2952 WaterMark.exe 22 PID 2956 wrote to memory of 2452 2956 WaterMark.exe 38 PID 1948 wrote to memory of 1032 1948 WaterMark.exe 39 PID 2956 wrote to memory of 2452 2956 WaterMark.exe 38
Processes
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalService1⤵PID:976
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs1⤵PID:844
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted1⤵PID:820
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C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\42666e61f8c187a3e1881f9fcf99c508.dll,#11⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:2156 -
C:\Windows\SysWOW64\rundll32mgr.exeC:\Windows\SysWOW64\rundll32mgr.exe2⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2672
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\42666e61f8c187a3e1881f9fcf99c508.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:2512
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted1⤵PID:756
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k RPCSS1⤵PID:680
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C:\Windows\SysWOW64\svchost.exeC:\Windows\system32\svchost.exe1⤵PID:2920
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C:\Windows\SysWOW64\svchost.exeC:\Windows\system32\svchost.exe1⤵
- Modifies WinLogon for persistence
- Drops file in System32 directory
- Drops file in Program Files directory
PID:1760
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C:\Windows\SysWOW64\svchost.exeC:\Windows\system32\svchost.exe1⤵PID:1644
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C:\Program Files (x86)\Microsoft\WaterMark.exe"C:\Program Files (x86)\Microsoft\WaterMark.exe"1⤵
- Executes dropped EXE
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1948 -
C:\Windows\SysWOW64\svchost.exeC:\Windows\system32\svchost.exe2⤵PID:1032
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C:\Program Files (x86)\Microsoft\WaterMarkmgr.exe"C:\Program Files (x86)\Microsoft\WaterMarkmgr.exe"1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2868
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C:\Program Files (x86)\Microsoft\WaterMark.exe"C:\Program Files (x86)\Microsoft\WaterMark.exe"1⤵
- Executes dropped EXE
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2952 -
C:\Windows\SysWOW64\svchost.exeC:\Windows\system32\svchost.exe2⤵
- Suspicious use of AdjustPrivilegeToken
PID:2368
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C:\Program Files (x86)\Microsoft\WaterMark.exe"C:\Program Files (x86)\Microsoft\WaterMark.exe"1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2956 -
C:\Windows\SysWOW64\svchost.exeC:\Windows\system32\svchost.exe2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2452
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C:\Windows\SysWOW64\rundll32mgrmgr.exeC:\Windows\SysWOW64\rundll32mgrmgr.exe1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2844
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k DcomLaunch1⤵PID:604
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C:\Windows\system32\lsm.exeC:\Windows\system32\lsm.exe1⤵PID:492
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C:\Windows\system32\lsass.exeC:\Windows\system32\lsass.exe1⤵PID:484
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C:\Windows\system32\services.exeC:\Windows\system32\services.exe1⤵PID:468
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C:\Windows\system32\winlogon.exewinlogon.exe1⤵PID:424
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C:\Windows\system32\csrss.exe%SystemRoot%\system32\csrss.exe ObjectDirectory=\Windows SharedSection=1024,20480,768 Windows=On SubSystemType=Windows ServerDll=basesrv,1 ServerDll=winsrv:UserServerDllInitialization,3 ServerDll=winsrv:ConServerDllInitialization,2 ServerDll=sxssrv,4 ProfileControl=Off MaxRequestThreads=161⤵PID:388
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C:\Windows\system32\wininit.exewininit.exe1⤵PID:376
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C:\Windows\system32\csrss.exe%SystemRoot%\system32\csrss.exe ObjectDirectory=\Windows SharedSection=1024,20480,768 Windows=On SubSystemType=Windows ServerDll=basesrv,1 ServerDll=winsrv:UserServerDllInitialization,3 ServerDll=winsrv:ConServerDllInitialization,2 ServerDll=sxssrv,4 ProfileControl=Off MaxRequestThreads=161⤵PID:340
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C:\Windows\System32\smss.exe\SystemRoot\System32\smss.exe1⤵PID:260