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Analysis
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max time kernel
229s -
max time network
294s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
16/12/2022, 12:38
Static task
static1
Behavioral task
behavioral1
Sample
BraveBrowserSetup.exe
Resource
win7-20221111-en
General
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Target
BraveBrowserSetup.exe
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Size
309.1MB
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MD5
931195d97525e56b81273de435a1b23a
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SHA1
a7b1888845db32aceb0c0d8a98a448e94ac95d0a
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SHA256
bd06228669802c5ee2f00c900dd17efd1763780b17f05346d5ddcf6ead24297b
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SHA512
c53b492d548f9cbd1f35aff646fe5344b141bf226aa78eb39c05914ff2704fd4cd9c5ed336967354b3311db487f60271374783ef6d485187ea714cd506912792
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SSDEEP
24576:jgo+DDRIgvlC+pKc8zDkfxUXtWjPMBzuxK2:M5DDRISrxUcjPMBzuxv
Malware Config
Signatures
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Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation BraveBrowserSetup.exe Key value queried \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation BraveBrowserSetup.exe -
Loads dropped DLL 2 IoCs
pid Process 4272 BraveBrowserSetup.exe 4272 BraveBrowserSetup.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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Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 2044 set thread context of 4272 2044 BraveBrowserSetup.exe 90 -
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.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 BraveBrowserSetup.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString BraveBrowserSetup.exe -
Delays execution with timeout.exe 1 IoCs
pid Process 3716 timeout.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 456 powershell.exe 456 powershell.exe 4272 BraveBrowserSetup.exe 4272 BraveBrowserSetup.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2044 BraveBrowserSetup.exe Token: SeDebugPrivilege 456 powershell.exe -
Suspicious use of WriteProcessMemory 18 IoCs
description pid Process procid_target PID 2044 wrote to memory of 456 2044 BraveBrowserSetup.exe 81 PID 2044 wrote to memory of 456 2044 BraveBrowserSetup.exe 81 PID 2044 wrote to memory of 456 2044 BraveBrowserSetup.exe 81 PID 2044 wrote to memory of 4272 2044 BraveBrowserSetup.exe 90 PID 2044 wrote to memory of 4272 2044 BraveBrowserSetup.exe 90 PID 2044 wrote to memory of 4272 2044 BraveBrowserSetup.exe 90 PID 2044 wrote to memory of 4272 2044 BraveBrowserSetup.exe 90 PID 2044 wrote to memory of 4272 2044 BraveBrowserSetup.exe 90 PID 2044 wrote to memory of 4272 2044 BraveBrowserSetup.exe 90 PID 2044 wrote to memory of 4272 2044 BraveBrowserSetup.exe 90 PID 2044 wrote to memory of 4272 2044 BraveBrowserSetup.exe 90 PID 2044 wrote to memory of 4272 2044 BraveBrowserSetup.exe 90 PID 4272 wrote to memory of 4508 4272 BraveBrowserSetup.exe 92 PID 4272 wrote to memory of 4508 4272 BraveBrowserSetup.exe 92 PID 4272 wrote to memory of 4508 4272 BraveBrowserSetup.exe 92 PID 4508 wrote to memory of 3716 4508 cmd.exe 94 PID 4508 wrote to memory of 3716 4508 cmd.exe 94 PID 4508 wrote to memory of 3716 4508 cmd.exe 94
Processes
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C:\Users\Admin\AppData\Local\Temp\BraveBrowserSetup.exe"C:\Users\Admin\AppData\Local\Temp\BraveBrowserSetup.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2044 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:456
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C:\Users\Admin\AppData\Local\Temp\BraveBrowserSetup.exeC:\Users\Admin\AppData\Local\Temp\BraveBrowserSetup.exe2⤵
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4272 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\BraveBrowserSetup.exe" & exit3⤵
- Suspicious use of WriteProcessMemory
PID:4508 -
C:\Windows\SysWOW64\timeout.exetimeout /t 64⤵
- Delays execution with timeout.exe
PID:3716
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
133KB
MD58f73c08a9660691143661bf7332c3c27
SHA137fa65dd737c50fda710fdbde89e51374d0c204a
SHA2563fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
SHA5120042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89
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Filesize
1.2MB
MD5bfac4e3c5908856ba17d41edcd455a51
SHA18eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA256e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
SHA5122565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66