Analysis
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max time kernel
112s -
max time network
112s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
08-12-2024 18:21
General
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Target
Client-built.exe
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Size
3.3MB
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MD5
8c5730b295d95613fffd0b6d45ccbf3b
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SHA1
4db0f81fd90a0d4a1a5fb3814fb41b4018a2c9c3
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SHA256
05cdc11f58a3ebde589ad04a1ab071522b946261092d5bd47fb7a8971593f4aa
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SHA512
91d1a5e8043b5bcb205098644ddeef5eb87d0532ef404e03a8f44ad0731008f28303982afcbb1f6616822096de8aba759182a2d1a74cc2020f70597e71f29db2
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SSDEEP
49152:wvuI22SsaNYfdPBldt698dBcjHpMWoeBxbaoGdsTHHB72eh2NTN:wvD22SsaNYfdPBldt6+dBcjHzo7
Malware Config
Extracted
Family
quasar
Version
1.4.1
Botnet
Office04
C2
45.200.148.155:6060
Mutex
4b3820e0-d123-49d9-b51e-3c4daa4f6874
Attributes
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encryption_key
F8879E9B26846C57C99B6F152F74703E1CC15B8B
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install_name
Client.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
SecurityHealthSystray.exe
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subdirectory
SubDir
Signatures
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Quasar family
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Quasar payload 2 IoCs
resource yara_rule behavioral1/memory/1008-1-0x0000000000560000-0x00000000008B2000-memory.dmp family_quasar behavioral1/files/0x0007000000023cb7-7.dat family_quasar -
Executes dropped EXE 1 IoCs
pid Process 3852 Client.exe -
Drops file in System32 directory 5 IoCs
description ioc Process File created C:\Windows\system32\SubDir\Client.exe Client-built.exe File opened for modification C:\Windows\system32\SubDir\Client.exe Client-built.exe File opened for modification C:\Windows\system32\SubDir Client-built.exe File opened for modification C:\Windows\system32\SubDir\Client.exe Client.exe File opened for modification C:\Windows\system32\SubDir Client.exe -
Checks SCSI registry key(s) 3 TTPs 6 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 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 -
Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 2396 schtasks.exe 396 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 884 taskmgr.exe 884 taskmgr.exe 884 taskmgr.exe 884 taskmgr.exe 884 taskmgr.exe 884 taskmgr.exe 884 taskmgr.exe 884 taskmgr.exe 884 taskmgr.exe 884 taskmgr.exe 884 taskmgr.exe 884 taskmgr.exe 884 taskmgr.exe 884 taskmgr.exe -
Suspicious use of AdjustPrivilegeToken 10 IoCs
description pid Process Token: SeDebugPrivilege 1008 Client-built.exe Token: SeDebugPrivilege 3852 Client.exe Token: SeDebugPrivilege 4892 taskmgr.exe Token: SeSystemProfilePrivilege 4892 taskmgr.exe Token: SeCreateGlobalPrivilege 4892 taskmgr.exe Token: 33 4892 taskmgr.exe Token: SeIncBasePriorityPrivilege 4892 taskmgr.exe Token: SeDebugPrivilege 884 taskmgr.exe Token: SeSystemProfilePrivilege 884 taskmgr.exe Token: SeCreateGlobalPrivilege 884 taskmgr.exe -
Suspicious use of FindShellTrayWindow 64 IoCs
pid Process 3852 Client.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe -
Suspicious use of SendNotifyMessage 64 IoCs
pid Process 3852 Client.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe 4892 taskmgr.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 1008 wrote to memory of 2396 1008 Client-built.exe 83 PID 1008 wrote to memory of 2396 1008 Client-built.exe 83 PID 1008 wrote to memory of 3852 1008 Client-built.exe 85 PID 1008 wrote to memory of 3852 1008 Client-built.exe 85 PID 3852 wrote to memory of 396 3852 Client.exe 86 PID 3852 wrote to memory of 396 3852 Client.exe 86 -
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\Client-built.exe"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1008 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "SecurityHealthSystray.exe" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
PID:2396
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C:\Windows\system32\SubDir\Client.exe"C:\Windows\system32\SubDir\Client.exe"2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:3852 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "SecurityHealthSystray.exe" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
PID:396
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C:\Windows\system32\taskmgr.exe"C:\Windows\system32\taskmgr.exe" /41⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:4892
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C:\Windows\system32\taskmgr.exe"C:\Windows\system32\taskmgr.exe" /41⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:884
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
64KB
MD5d2fb266b97caff2086bf0fa74eddb6b2
SHA12f0061ce9c51b5b4fbab76b37fc6a540be7f805d
SHA256b09f68b61d9ff5a7c7c8b10eee9447d4813ee0e866346e629e788cd4adecb66a
SHA512c3ba95a538c1d266beb83334af755c34ce642a4178ab0f2e5f7822fd6821d3b68862a8b58f167a9294e6d913b08c1054a69b5d7aec2efdb3cf9796ed84de21a8
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Filesize
4B
MD5f49655f856acb8884cc0ace29216f511
SHA1cb0f1f87ec0455ec349aaa950c600475ac7b7b6b
SHA2567852fce59c67ddf1d6b8b997eaa1adfac004a9f3a91c37295de9223674011fba
SHA512599e93d25b174524495ed29653052b3590133096404873318f05fd68f4c9a5c9a3b30574551141fbb73d7329d6be342699a17f3ae84554bab784776dfda2d5f8
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Filesize
944B
MD56bd369f7c74a28194c991ed1404da30f
SHA10f8e3f8ab822c9374409fe399b6bfe5d68cbd643
SHA256878947d0ec814fe7c343cdebc05eebf00eb14f3023bdb3809a559e17f399fe5d
SHA5128fc5f073dc9fa1e1ae47c60a5f06e0a48709fd6a4302dffaa721858409e7bde64bc6856d3fb28891090516d1a7afc542579de287778b5755eafe75cc67d45d93
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Filesize
3.3MB
MD58c5730b295d95613fffd0b6d45ccbf3b
SHA14db0f81fd90a0d4a1a5fb3814fb41b4018a2c9c3
SHA25605cdc11f58a3ebde589ad04a1ab071522b946261092d5bd47fb7a8971593f4aa
SHA51291d1a5e8043b5bcb205098644ddeef5eb87d0532ef404e03a8f44ad0731008f28303982afcbb1f6616822096de8aba759182a2d1a74cc2020f70597e71f29db2