Analysis
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max time kernel
140s -
max time network
123s -
platform
windows7_x64 -
resource
win7-20240508-en -
resource tags
arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system -
submitted
04-06-2024 01:01
Behavioral task
behavioral1
Sample
a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.exe
Resource
win10v2004-20240508-en
General
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Target
a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.exe
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Size
91KB
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MD5
3d0540f21135b4ae6f6835eec3479053
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SHA1
4c630e0a53a18706dccfbc6752ec5b6837514533
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SHA256
a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f
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SHA512
4d1e4795aea29aba27c29f97579d66fba42ca37361e1a877d3eba3961bd01314bbd038490c877095092fb4d03beba7dc8e17198e192a692feec4d568a58d689d
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SSDEEP
1536:N5VzcfA/6LrVpL74gfh16ntnY3WBJsVICh2FxixCUh6+ghR2LG+Loz8RXLNZngIL:/V2A/gVh74gpg63W+22XDgD2a+LH5LPP
Malware Config
Signatures
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UPX dump on OEP (original entry point) 5 IoCs
Processes:
resource yara_rule behavioral1/memory/1728-0-0x0000000000B20000-0x0000000000B38000-memory.dmp UPX behavioral1/memory/1728-15-0x0000000000B20000-0x0000000000B38000-memory.dmp UPX C:\Windows\CTS.exe UPX behavioral1/memory/2052-17-0x0000000000FD0000-0x0000000000FE8000-memory.dmp UPX behavioral1/memory/2052-22-0x0000000000FD0000-0x0000000000FE8000-memory.dmp UPX -
Executes dropped EXE 2 IoCs
Processes:
FsmWysgMwmTWXAZ.exeCTS.exepid process 2012 FsmWysgMwmTWXAZ.exe 2052 CTS.exe -
Loads dropped DLL 2 IoCs
Processes:
a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.exepid process 1728 a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.exe 1728 a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Processes:
resource yara_rule behavioral1/memory/1728-0-0x0000000000B20000-0x0000000000B38000-memory.dmp upx behavioral1/memory/1728-15-0x0000000000B20000-0x0000000000B38000-memory.dmp upx C:\Windows\CTS.exe upx behavioral1/memory/2052-17-0x0000000000FD0000-0x0000000000FE8000-memory.dmp upx behavioral1/memory/2052-22-0x0000000000FD0000-0x0000000000FE8000-memory.dmp upx -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" CTS.exe -
Drops file in Windows directory 2 IoCs
Processes:
a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.exeCTS.exedescription pid process Token: SeDebugPrivilege 1728 a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.exe Token: SeDebugPrivilege 2052 CTS.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.exedescription pid process target process PID 1728 wrote to memory of 2012 1728 a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.exe FsmWysgMwmTWXAZ.exe PID 1728 wrote to memory of 2012 1728 a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.exe FsmWysgMwmTWXAZ.exe PID 1728 wrote to memory of 2012 1728 a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.exe FsmWysgMwmTWXAZ.exe PID 1728 wrote to memory of 2012 1728 a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.exe FsmWysgMwmTWXAZ.exe PID 1728 wrote to memory of 2052 1728 a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.exe CTS.exe PID 1728 wrote to memory of 2052 1728 a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.exe CTS.exe PID 1728 wrote to memory of 2052 1728 a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.exe CTS.exe PID 1728 wrote to memory of 2052 1728 a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.exe"C:\Users\Admin\AppData\Local\Temp\a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.exe"1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1728 -
C:\Users\Admin\AppData\Local\Temp\FsmWysgMwmTWXAZ.exeC:\Users\Admin\AppData\Local\Temp\FsmWysgMwmTWXAZ.exe2⤵
- Executes dropped EXE
PID:2012
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C:\Windows\CTS.exe"C:\Windows\CTS.exe"2⤵
- Executes dropped EXE
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:2052
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
27KB
MD5a6749b968461644db5cc0ecceffb224a
SHA12795aa37b8586986a34437081351cdd791749a90
SHA256720023737d7ff700818f55612ba069a609a5ddea646bb3509b615ee3523a4ca2
SHA5122a276816290746ed914af9cf6427aef31ce9395b8e9937090e329a8f74fb84c62d15b196e13346caa086842b3f5f549b9eb20cbf422d18c9c1b63e6342ea90b4
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Filesize
64KB
MD5ae6ce17005c63b7e9bf15a2a21abb315
SHA19b6bdfb9d648fa422f54ec07b8c8ea70389c09eb
SHA2564a3387a54eeca83f3a8ff1f5f282f7966c9e7bfe159c8eb45444cab01b3e167e
SHA512c883a5f599540d636efc8c0abc05aab7bad0aa1b10ab507f43f18e0fba905a10b94ff2f1ba10ae0fee15cc1b90a165a768dc078fda0ac27474f0eef66f6a11af