Analysis
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max time kernel
59s -
max time network
54s -
platform
windows10-2004_x64 -
resource
win10v2004-20240730-en -
resource tags
arch:x64arch:x86image:win10v2004-20240730-enlocale:en-usos:windows10-2004-x64system -
submitted
31-07-2024 17:36
Errors
Reason
Machine shutdown
General
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Target
RuntimeBroker.exe
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Size
63KB
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MD5
f5a40491d3d4f90d1f414c932841741e
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SHA1
8f8a02955aa090e13d29138507446fe7e566a99a
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SHA256
fe2c786ed4dd2c76c6352623c6b46644a9a640eb1093fdadd53688f9940f6bdc
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SHA512
ede3a856ec9374c68c57b8d8ba3a44c124c115c5b56c7eee9c3699a37c49828c2bec5e26a917ce186f1d23b54f01f2651f1f099084a3a6a1f3ad9ec54f3c0476
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SSDEEP
1536:vZI9tj/J4cDzCAzVBOnhKfMZ4JGbbpwAiCkbnonGfkpqKmY7:vZctj/J4cDz5B8hfgGbbplWnoovz
Malware Config
Extracted
Family
asyncrat
Version
ChuWaWa 5.2
Botnet
ChuWaWa
C2
31.173.170.243:7777
Mutex
ChuWaWaRatMutex_penka
Attributes
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delay
1
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install
true
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install_file
RuntimeBroker.exe
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install_folder
%AppData%
aes.plain
Signatures
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Async RAT payload 1 IoCs
resource yara_rule behavioral1/files/0x000b000000023482-21.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-1-5-21-113082768-653872390-2867000172-1000\Control Panel\International\Geo\Nation RuntimeBroker.exe -
Executes dropped EXE 1 IoCs
pid Process 2044 RuntimeBroker.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Checks SCSI registry key(s) 3 TTPs 3 IoCs
SCSI information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000 taskmgr.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A taskmgr.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\FriendlyName taskmgr.exe -
Delays execution with timeout.exe 1 IoCs
pid Process 468 timeout.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-113082768-653872390-2867000172-1000_Classes\Local Settings taskmgr.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 3684 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 3932 RuntimeBroker.exe 3932 RuntimeBroker.exe 3932 RuntimeBroker.exe 3932 RuntimeBroker.exe 3932 RuntimeBroker.exe 3932 RuntimeBroker.exe 3932 RuntimeBroker.exe 3932 RuntimeBroker.exe 3932 RuntimeBroker.exe 3932 RuntimeBroker.exe 3932 RuntimeBroker.exe 3932 RuntimeBroker.exe 3932 RuntimeBroker.exe 3932 RuntimeBroker.exe 3932 RuntimeBroker.exe 3932 RuntimeBroker.exe 3932 RuntimeBroker.exe 3932 RuntimeBroker.exe 3932 RuntimeBroker.exe 3932 RuntimeBroker.exe 3932 RuntimeBroker.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 2396 taskmgr.exe -
Suspicious use of AdjustPrivilegeToken 7 IoCs
description pid Process Token: SeDebugPrivilege 3932 RuntimeBroker.exe Token: SeDebugPrivilege 3932 RuntimeBroker.exe Token: SeDebugPrivilege 2396 taskmgr.exe Token: SeSystemProfilePrivilege 2396 taskmgr.exe Token: SeCreateGlobalPrivilege 2396 taskmgr.exe Token: SeDebugPrivilege 2044 RuntimeBroker.exe Token: SeDebugPrivilege 2044 RuntimeBroker.exe -
Suspicious use of FindShellTrayWindow 64 IoCs
pid Process 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe -
Suspicious use of SendNotifyMessage 64 IoCs
pid Process 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe 2396 taskmgr.exe -
Suspicious use of WriteProcessMemory 10 IoCs
description pid Process procid_target PID 3932 wrote to memory of 1860 3932 RuntimeBroker.exe 86 PID 3932 wrote to memory of 1860 3932 RuntimeBroker.exe 86 PID 3932 wrote to memory of 3604 3932 RuntimeBroker.exe 88 PID 3932 wrote to memory of 3604 3932 RuntimeBroker.exe 88 PID 1860 wrote to memory of 3684 1860 cmd.exe 90 PID 1860 wrote to memory of 3684 1860 cmd.exe 90 PID 3604 wrote to memory of 468 3604 cmd.exe 91 PID 3604 wrote to memory of 468 3604 cmd.exe 91 PID 3604 wrote to memory of 2044 3604 cmd.exe 93 PID 3604 wrote to memory of 2044 3604 cmd.exe 93 -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\RuntimeBroker.exe"C:\Users\Admin\AppData\Local\Temp\RuntimeBroker.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3932 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "RuntimeBroker" /tr '"C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe"' & exit2⤵
- Suspicious use of WriteProcessMemory
PID:1860 -
C:\Windows\system32\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "RuntimeBroker" /tr '"C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe"'3⤵
- Scheduled Task/Job: Scheduled Task
PID:3684
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB4B9.tmp.bat""2⤵
- Suspicious use of WriteProcessMemory
PID:3604 -
C:\Windows\system32\timeout.exetimeout 33⤵
- Delays execution with timeout.exe
PID:468
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C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe"C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe"3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2044
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C:\Windows\system32\taskmgr.exe"C:\Windows\system32\taskmgr.exe" /41⤵
- Checks SCSI registry key(s)
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:2396
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C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding1⤵PID:2768
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
425B
MD5fff5cbccb6b31b40f834b8f4778a779a
SHA1899ed0377e89f1ed434cfeecc5bc0163ebdf0454
SHA256b8f7e4ed81764db56b9c09050f68c5a26af78d8a5e2443e75e0e1aa7cd2ccd76
SHA5121a188a14c667bc31d2651b220aa762be9cce4a75713217846fbe472a307c7bbc6e3c27617f75f489902a534d9184648d204d03ee956ac57b11aa90551248b8f9
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Filesize
157B
MD50d24c3ac9504d61b2494d0fb2747f726
SHA114f199893b3e9288a8f211c47bdfadb7009d9276
SHA256a292f2f0643127518db73e7df28aaa93fcf72553710cd8ad720d97e348def47c
SHA5121f0fe8eca417b391c73d601d56f2da5a07feffa522d472a43e939bdc01666ec4dc4986f9f3d46dca48c919585e37505256661b5c989eb5ec2919a935c8f6dd89
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Filesize
63KB
MD5f5a40491d3d4f90d1f414c932841741e
SHA18f8a02955aa090e13d29138507446fe7e566a99a
SHA256fe2c786ed4dd2c76c6352623c6b46644a9a640eb1093fdadd53688f9940f6bdc
SHA512ede3a856ec9374c68c57b8d8ba3a44c124c115c5b56c7eee9c3699a37c49828c2bec5e26a917ce186f1d23b54f01f2651f1f099084a3a6a1f3ad9ec54f3c0476