Analysis
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max time kernel
53s -
max time network
56s -
platform
windows10-1703_x64 -
resource
win10-20230220-en -
resource tags
arch:x64arch:x86image:win10-20230220-enlocale:en-usos:windows10-1703-x64system -
submitted
31-03-2023 19:15
Static task
static1
General
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Target
ffaa265d7e23d3fcd11b7e8819ac5e969327b3bd7047f9bd47bd21a1ee676217.exe
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Size
217KB
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MD5
b2460cb089ff6eda8ded75d9b858e718
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SHA1
f996dd360d386816f917054fba8d4c2eb6e75eed
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SHA256
ffaa265d7e23d3fcd11b7e8819ac5e969327b3bd7047f9bd47bd21a1ee676217
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SHA512
6b06d1f1015c1118776990b91892d6feafad67e725c53910124e32b1b0abcee6241e7b212c0a87d3f42bc589bbaeb209de238ad4aad57130d8be0649119d2b7c
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SSDEEP
3072:wyyt4UXN2aCnpU/1lfu4JftvXwz37qW5cVbQmP:5PUhCnpilTHvAz7SV0mP
Malware Config
Extracted
stealc
http://arthurmaes.top/410b5129171f10ea.php
Signatures
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Detects Stealc stealer 2 IoCs
Processes:
resource yara_rule behavioral1/memory/3200-160-0x0000000000400000-0x0000000000628000-memory.dmp family_stealc behavioral1/memory/3200-197-0x0000000000400000-0x0000000000628000-memory.dmp family_stealc -
Downloads MZ/PE file
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Loads dropped DLL 2 IoCs
Processes:
ffaa265d7e23d3fcd11b7e8819ac5e969327b3bd7047f9bd47bd21a1ee676217.exepid process 3200 ffaa265d7e23d3fcd11b7e8819ac5e969327b3bd7047f9bd47bd21a1ee676217.exe 3200 ffaa265d7e23d3fcd11b7e8819ac5e969327b3bd7047f9bd47bd21a1ee676217.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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Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
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Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
ffaa265d7e23d3fcd11b7e8819ac5e969327b3bd7047f9bd47bd21a1ee676217.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 ffaa265d7e23d3fcd11b7e8819ac5e969327b3bd7047f9bd47bd21a1ee676217.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString ffaa265d7e23d3fcd11b7e8819ac5e969327b3bd7047f9bd47bd21a1ee676217.exe -
Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 4668 timeout.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
ffaa265d7e23d3fcd11b7e8819ac5e969327b3bd7047f9bd47bd21a1ee676217.exepid process 3200 ffaa265d7e23d3fcd11b7e8819ac5e969327b3bd7047f9bd47bd21a1ee676217.exe 3200 ffaa265d7e23d3fcd11b7e8819ac5e969327b3bd7047f9bd47bd21a1ee676217.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
ffaa265d7e23d3fcd11b7e8819ac5e969327b3bd7047f9bd47bd21a1ee676217.execmd.exedescription pid process target process PID 3200 wrote to memory of 2956 3200 ffaa265d7e23d3fcd11b7e8819ac5e969327b3bd7047f9bd47bd21a1ee676217.exe cmd.exe PID 3200 wrote to memory of 2956 3200 ffaa265d7e23d3fcd11b7e8819ac5e969327b3bd7047f9bd47bd21a1ee676217.exe cmd.exe PID 3200 wrote to memory of 2956 3200 ffaa265d7e23d3fcd11b7e8819ac5e969327b3bd7047f9bd47bd21a1ee676217.exe cmd.exe PID 2956 wrote to memory of 4668 2956 cmd.exe timeout.exe PID 2956 wrote to memory of 4668 2956 cmd.exe timeout.exe PID 2956 wrote to memory of 4668 2956 cmd.exe timeout.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\ffaa265d7e23d3fcd11b7e8819ac5e969327b3bd7047f9bd47bd21a1ee676217.exe"C:\Users\Admin\AppData\Local\Temp\ffaa265d7e23d3fcd11b7e8819ac5e969327b3bd7047f9bd47bd21a1ee676217.exe"1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\ffaa265d7e23d3fcd11b7e8819ac5e969327b3bd7047f9bd47bd21a1ee676217.exe" & del "C:\ProgramData\*.dll"" & exit2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\timeout.exetimeout /t 53⤵
- Delays execution with timeout.exe
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\ProgramData\mozglue.dllFilesize
593KB
MD5c8fd9be83bc728cc04beffafc2907fe9
SHA195ab9f701e0024cedfbd312bcfe4e726744c4f2e
SHA256ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
SHA512fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040
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\ProgramData\mozglue.dllFilesize
593KB
MD5c8fd9be83bc728cc04beffafc2907fe9
SHA195ab9f701e0024cedfbd312bcfe4e726744c4f2e
SHA256ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
SHA512fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040
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\ProgramData\nss3.dllFilesize
2.0MB
MD51cc453cdf74f31e4d913ff9c10acdde2
SHA16e85eae544d6e965f15fa5c39700fa7202f3aafe
SHA256ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
SHA512dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571
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memory/3200-122-0x0000000000860000-0x0000000000875000-memory.dmpFilesize
84KB
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memory/3200-123-0x0000000061E00000-0x0000000061EF3000-memory.dmpFilesize
972KB
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memory/3200-160-0x0000000000400000-0x0000000000628000-memory.dmpFilesize
2.2MB
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memory/3200-197-0x0000000000400000-0x0000000000628000-memory.dmpFilesize
2.2MB