Analysis
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max time kernel
144s -
max time network
146s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
18-12-2024 02:55
Behavioral task
behavioral1
Sample
bro.exe
Resource
win10v2004-20241007-en
General
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Target
bro.exe
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Size
47KB
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MD5
83fc5776b79aad95fecd322f11f80187
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SHA1
412ccb9ab9e743907eef7be3b47568decefbd15f
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SHA256
e87744178fba28b505eccbf4847a77f84877a8bd8f50ce17f5f6f68a0ea41327
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SHA512
1552e626f349c66f7e555326e68d97aa87a4971b6c4b912514f1bfa39036d17c9295e88e0f49c349cac2758974e060535044ea4d09a25f2949f45ab79f0c838b
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SSDEEP
768:MuY69T3kH1jWUvTqRmo2qbRc4wmDPItjd0axq0bE6zrvtOoqJ/UBDZ0x:MuY69T34y2AwmMtjZHbE6/vgMd0x
Malware Config
Extracted
asyncrat
0.5.8
Default
desktop-ukmnq5d-wasda.at.remote.it:33006
tTT9mCTiJnq9
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delay
3
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install
true
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install_file
roar.exe
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install_folder
%AppData%
Signatures
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Asyncrat family
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Async RAT payload 1 IoCs
resource yara_rule behavioral1/files/0x000a000000023b8f-11.dat family_asyncrat -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation bro.exe -
Executes dropped EXE 1 IoCs
pid Process 1680 roar.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 6 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language schtasks.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language timeout.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language roar.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language bro.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe -
Delays execution with timeout.exe 1 IoCs
pid Process 324 timeout.exe -
Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 1176 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 23 IoCs
pid Process 680 bro.exe 680 bro.exe 680 bro.exe 680 bro.exe 680 bro.exe 680 bro.exe 680 bro.exe 680 bro.exe 680 bro.exe 680 bro.exe 680 bro.exe 680 bro.exe 680 bro.exe 680 bro.exe 680 bro.exe 680 bro.exe 680 bro.exe 680 bro.exe 680 bro.exe 680 bro.exe 680 bro.exe 680 bro.exe 680 bro.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 680 bro.exe Token: SeDebugPrivilege 1680 roar.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 680 wrote to memory of 5072 680 bro.exe 84 PID 680 wrote to memory of 5072 680 bro.exe 84 PID 680 wrote to memory of 5072 680 bro.exe 84 PID 680 wrote to memory of 4108 680 bro.exe 86 PID 680 wrote to memory of 4108 680 bro.exe 86 PID 680 wrote to memory of 4108 680 bro.exe 86 PID 5072 wrote to memory of 1176 5072 cmd.exe 88 PID 5072 wrote to memory of 1176 5072 cmd.exe 88 PID 5072 wrote to memory of 1176 5072 cmd.exe 88 PID 4108 wrote to memory of 324 4108 cmd.exe 89 PID 4108 wrote to memory of 324 4108 cmd.exe 89 PID 4108 wrote to memory of 324 4108 cmd.exe 89 PID 4108 wrote to memory of 1680 4108 cmd.exe 90 PID 4108 wrote to memory of 1680 4108 cmd.exe 90 PID 4108 wrote to memory of 1680 4108 cmd.exe 90
Processes
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C:\Users\Admin\AppData\Local\Temp\bro.exe"C:\Users\Admin\AppData\Local\Temp\bro.exe"1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:680 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "roar" /tr '"C:\Users\Admin\AppData\Roaming\roar.exe"' & exit2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5072 -
C:\Windows\SysWOW64\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "roar" /tr '"C:\Users\Admin\AppData\Roaming\roar.exe"'3⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:1176
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8EB3.tmp.bat""2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4108 -
C:\Windows\SysWOW64\timeout.exetimeout 33⤵
- System Location Discovery: System Language Discovery
- Delays execution with timeout.exe
PID:324
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C:\Users\Admin\AppData\Roaming\roar.exe"C:\Users\Admin\AppData\Roaming\roar.exe"3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1680
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
148B
MD5370d5ab30ba900feadda73f1f0522646
SHA117fde6200f0c5f1b8322de802f65a890075c44df
SHA256ed363f3947567a904a25eb790879a97062f11ef483a4bfad8587df32af73370d
SHA5124cd94be7e6a2e42433c386baf2faf11b61dd3f2115c1a7845532e94928eb912dfa2c5c829b9dec929154081dd52785ceff79113c85990f3337ff5d6d9f6890dc
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Filesize
47KB
MD583fc5776b79aad95fecd322f11f80187
SHA1412ccb9ab9e743907eef7be3b47568decefbd15f
SHA256e87744178fba28b505eccbf4847a77f84877a8bd8f50ce17f5f6f68a0ea41327
SHA5121552e626f349c66f7e555326e68d97aa87a4971b6c4b912514f1bfa39036d17c9295e88e0f49c349cac2758974e060535044ea4d09a25f2949f45ab79f0c838b