Analysis
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max time kernel
135s -
max time network
145s -
platform
windows10-2004_x64 -
resource
win10v2004-20230220-en -
resource tags
arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system -
submitted
31-03-2023 20:45
Static task
static1
General
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Target
a683bfb95ea7e054978218856de9611cf412fc8f246fffae816657d023a1c51c.exe
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Size
259KB
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MD5
5f56b527d28648d14ab832413ec61659
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SHA1
79e0c4778f6c74c8c16acb8bb616b53f3f70b7fa
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SHA256
a683bfb95ea7e054978218856de9611cf412fc8f246fffae816657d023a1c51c
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SHA512
793704f50884ffe9793820ab8f6398f207b536c09edbcd4ada20523ac535412208255cb2a0ba1e8897abf895f5af360f605868fd1b2e3c4fdb480cd65267779e
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SSDEEP
3072:yCyD5NQAdrD7R6tzatjfdXqzFcpfe6hYNOfkE5SSWPREW5cRP5xet:vuhnl6t+trd6Zcpf5YXEwVuRP5At
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/4260-201-0x0000000000400000-0x0000000001AD8000-memory.dmp family_stealc behavioral1/memory/4260-222-0x0000000000400000-0x0000000001AD8000-memory.dmp family_stealc -
Downloads MZ/PE file
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
a683bfb95ea7e054978218856de9611cf412fc8f246fffae816657d023a1c51c.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Control Panel\International\Geo\Nation a683bfb95ea7e054978218856de9611cf412fc8f246fffae816657d023a1c51c.exe -
Loads dropped DLL 2 IoCs
Processes:
a683bfb95ea7e054978218856de9611cf412fc8f246fffae816657d023a1c51c.exepid process 4260 a683bfb95ea7e054978218856de9611cf412fc8f246fffae816657d023a1c51c.exe 4260 a683bfb95ea7e054978218856de9611cf412fc8f246fffae816657d023a1c51c.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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Program crash 1 IoCs
Processes:
WerFault.exepid pid_target process target process 3220 4260 WerFault.exe a683bfb95ea7e054978218856de9611cf412fc8f246fffae816657d023a1c51c.exe -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
a683bfb95ea7e054978218856de9611cf412fc8f246fffae816657d023a1c51c.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString a683bfb95ea7e054978218856de9611cf412fc8f246fffae816657d023a1c51c.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 a683bfb95ea7e054978218856de9611cf412fc8f246fffae816657d023a1c51c.exe -
Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 904 timeout.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
a683bfb95ea7e054978218856de9611cf412fc8f246fffae816657d023a1c51c.exepid process 4260 a683bfb95ea7e054978218856de9611cf412fc8f246fffae816657d023a1c51c.exe 4260 a683bfb95ea7e054978218856de9611cf412fc8f246fffae816657d023a1c51c.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
a683bfb95ea7e054978218856de9611cf412fc8f246fffae816657d023a1c51c.execmd.exedescription pid process target process PID 4260 wrote to memory of 4060 4260 a683bfb95ea7e054978218856de9611cf412fc8f246fffae816657d023a1c51c.exe cmd.exe PID 4260 wrote to memory of 4060 4260 a683bfb95ea7e054978218856de9611cf412fc8f246fffae816657d023a1c51c.exe cmd.exe PID 4260 wrote to memory of 4060 4260 a683bfb95ea7e054978218856de9611cf412fc8f246fffae816657d023a1c51c.exe cmd.exe PID 4060 wrote to memory of 904 4060 cmd.exe timeout.exe PID 4060 wrote to memory of 904 4060 cmd.exe timeout.exe PID 4060 wrote to memory of 904 4060 cmd.exe timeout.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\a683bfb95ea7e054978218856de9611cf412fc8f246fffae816657d023a1c51c.exe"C:\Users\Admin\AppData\Local\Temp\a683bfb95ea7e054978218856de9611cf412fc8f246fffae816657d023a1c51c.exe"1⤵
- Checks computer location settings
- 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\a683bfb95ea7e054978218856de9611cf412fc8f246fffae816657d023a1c51c.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
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4260 -s 23322⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4260 -ip 42601⤵
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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C:\ProgramData\mozglue.dllFilesize
593KB
MD5c8fd9be83bc728cc04beffafc2907fe9
SHA195ab9f701e0024cedfbd312bcfe4e726744c4f2e
SHA256ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
SHA512fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040
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C:\ProgramData\nss3.dllFilesize
2.0MB
MD51cc453cdf74f31e4d913ff9c10acdde2
SHA16e85eae544d6e965f15fa5c39700fa7202f3aafe
SHA256ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
SHA512dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571
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C:\Users\Admin\AppData\Local\Temp\Are.docxFilesize
11KB
MD5a33e5b189842c5867f46566bdbf7a095
SHA1e1c06359f6a76da90d19e8fd95e79c832edb3196
SHA2565abf8e3d1f78de7b09d7f6fb87f9e80e60caacf13ef3c1289665653dacd7c454
SHA512f2ad3812ec9b915e9618539b0f103f2e9acaad25fbbacd84941c954ce070af231324e83a4621e951c1dbae8d40d50410954e40dd52bbd46e34c54b0d1957407b
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memory/4260-134-0x0000000001D70000-0x0000000001D85000-memory.dmpFilesize
84KB
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memory/4260-135-0x0000000000400000-0x0000000001AD8000-memory.dmpFilesize
22.8MB
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memory/4260-137-0x0000000061E00000-0x0000000061EF3000-memory.dmpFilesize
972KB
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memory/4260-201-0x0000000000400000-0x0000000001AD8000-memory.dmpFilesize
22.8MB
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memory/4260-222-0x0000000000400000-0x0000000001AD8000-memory.dmpFilesize
22.8MB