Analysis
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max time kernel
141s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
19/01/2024, 05:20
Static task
static1
Behavioral task
behavioral1
Sample
66cc26408e43ea77955496d4a58f28ba.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
66cc26408e43ea77955496d4a58f28ba.exe
Resource
win10v2004-20231215-en
General
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Target
66cc26408e43ea77955496d4a58f28ba.exe
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Size
539KB
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MD5
66cc26408e43ea77955496d4a58f28ba
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SHA1
7b7cc4e6490cc53c166d984051c88562d789d2b0
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SHA256
a76ae5c657d3625259472b8bfa4e81a9e153c0772466fdd9f873bbe47795221e
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SHA512
b67aee4f15b2c9600be08f27d33fb48f589e17c55bc832646039fb9d013b687c073390858900765cc06fc44a3c42637fe55d1cf8d8957208203fc542374e7030
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SSDEEP
12288:nJPfSQm/MdrkaX21WWmv+gPRVtRIF3Z4mxxsDqVTVOCatReNv:JPfSJ/MB78U+gPRWQmXLVTz2R0
Malware Config
Signatures
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Sets DLL path for service in the registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\BRC_Services\Parameters\ServiceDll = "C:\\Windows\\system32\\brc_Server.dll" 66cc26408e43ea77955496d4a58f28ba.exe -
Loads dropped DLL 1 IoCs
pid Process 1788 svchost.exe -
Drops file in System32 directory 5 IoCs
description ioc Process File created C:\Windows\SysWOW64\brc_Server.exe 66cc26408e43ea77955496d4a58f28ba.exe File opened for modification C:\Windows\SysWOW64\brc_Server.exe 66cc26408e43ea77955496d4a58f28ba.exe File created C:\Windows\SysWOW64\brc_Server.dll 66cc26408e43ea77955496d4a58f28ba.exe File opened for modification C:\Windows\SysWOW64\brc_Server.dat 66cc26408e43ea77955496d4a58f28ba.exe File created C:\Windows\SysWOW64\brc_Server.dat 66cc26408e43ea77955496d4a58f28ba.exe -
Suspicious behavior: EnumeratesProcesses 10 IoCs
pid Process 4280 66cc26408e43ea77955496d4a58f28ba.exe 4280 66cc26408e43ea77955496d4a58f28ba.exe 4280 66cc26408e43ea77955496d4a58f28ba.exe 4280 66cc26408e43ea77955496d4a58f28ba.exe 4280 66cc26408e43ea77955496d4a58f28ba.exe 4280 66cc26408e43ea77955496d4a58f28ba.exe 4280 66cc26408e43ea77955496d4a58f28ba.exe 4280 66cc26408e43ea77955496d4a58f28ba.exe 4280 66cc26408e43ea77955496d4a58f28ba.exe 4280 66cc26408e43ea77955496d4a58f28ba.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\66cc26408e43ea77955496d4a58f28ba.exe"C:\Users\Admin\AppData\Local\Temp\66cc26408e43ea77955496d4a58f28ba.exe"1⤵
- Sets DLL path for service in the registry
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
PID:4280
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C:\Windows\SysWOW64\svchost.exeC:\Windows\SysWOW64\svchost.exe -k netsvcs1⤵
- Loads dropped DLL
PID:1788
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
184B
MD507b66e225c8dfde615498b8ff361c7fa
SHA1125219c328a852b157f0e3f18f01f4669b65f8cc
SHA256c02593a1769f660633bf5e0d231fb6cd99cf778a10092b72fd086cb794eb27d6
SHA512a4f9309733f7b9b2f35042d03c3fe726900cd13ea9e689036a721b7ead934f6b85721c7c010cc7f488f25df6ba91b3356c257e8a5364d53466c2329c20905ec3
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Filesize
236KB
MD5132a149e92a8bcebdd39f36c8ec98af4
SHA1b02f6cb49d92fda0456f5ef418740d64a2f22034
SHA25611909b929fb9e7ce8e906a0ff056390a886336274c0b335cbf25a2f9b941a44e
SHA512cae169d3d732d8c7ff0baa117a347900743983803e3ee86778e4141941e123658065ec411b87f203da3b0587711e26aafa160442c8f9a24bfa3c418807c17533
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Filesize
294KB
MD5c02f1933e42a965caced918d1cc40e97
SHA17fa6e5220c0671c25f1a3ecba7a66580a50eb7cf
SHA256d4beecf5029208a0aa0facabb0c4110550947feb604f46b4e6e97dc0869c40b4
SHA5123d5a5dfdb5342a9f694444e060122ca25340f30eb33e660ed21959488119003e24dfa42ab5cf0cbd2613797fec4364dd14040ff0a7e950d25f85f23e06d78c92