Analysis
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max time kernel
234s -
max time network
252s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
18/08/2024, 21:19
Behavioral task
behavioral1
Sample
Client-built.exe
Resource
win7-20240705-en
General
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Target
Client-built.exe
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Size
3.3MB
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MD5
449c9192baa7503151f8bb30aa32153b
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SHA1
3906a9de42cb337d89e49542660f38144138d7ba
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SHA256
2d43f484fc7f954ecd5da337017ab2eb58c26ef39ec07e9bf5d53af63c9c4db8
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SHA512
c1fe393d34f2af903c755c9d18faeb71193ef6ceb285d1900c2b6df1798346f927367ab32c5b2de5f39e47b781f8a94224642effe2400323f7a0153a0c7fa624
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SSDEEP
49152:N6LFXL5Z8hlPKxXavYPBdjSx7sx+5I2jEyTHHB72eh2NT1:N6p5Z8hlPKxXavIXc7sx0ux
Malware Config
Extracted
quasar
1.4.1
SKIDS
147.185.221.22:6712
9dcff5fc-a88b-409b-a00a-590c080de54a
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encryption_key
36CF4D30A4E867DAD17ECBDA8EC17D90EA239A59
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install_name
Windows Host Process.exe
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log_directory
Windows-Logs
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reconnect_delay
3000
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startup_key
Windows Host Process
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subdirectory
Windows
Signatures
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Quasar payload 2 IoCs
resource yara_rule behavioral2/memory/1840-1-0x0000000000D90000-0x00000000010E8000-memory.dmp family_quasar behavioral2/files/0x000700000002359f-6.dat family_quasar -
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-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation Windows Host Process.exe -
Executes dropped EXE 1 IoCs
pid Process 3980 Windows Host Process.exe -
Drops file in System32 directory 5 IoCs
description ioc Process File created C:\Windows\system32\Windows\Windows Host Process.exe Client-built.exe File opened for modification C:\Windows\system32\Windows\Windows Host Process.exe Client-built.exe File opened for modification C:\Windows\system32\Windows Client-built.exe File opened for modification C:\Windows\system32\Windows\Windows Host Process.exe Windows Host Process.exe File opened for modification C:\Windows\system32\Windows Windows Host Process.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs
Adversaries may check for Internet connectivity on compromised systems.
pid Process 4912 PING.EXE -
Runs ping.exe 1 TTPs 1 IoCs
pid Process 4912 PING.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 4548 schtasks.exe 2356 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 1840 Client-built.exe Token: SeDebugPrivilege 3980 Windows Host Process.exe -
Suspicious use of FindShellTrayWindow 4 IoCs
pid Process 3980 Windows Host Process.exe 3980 Windows Host Process.exe 3980 Windows Host Process.exe 3980 Windows Host Process.exe -
Suspicious use of SendNotifyMessage 4 IoCs
pid Process 3980 Windows Host Process.exe 3980 Windows Host Process.exe 3980 Windows Host Process.exe 3980 Windows Host Process.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 3980 Windows Host Process.exe -
Suspicious use of WriteProcessMemory 14 IoCs
description pid Process procid_target PID 1840 wrote to memory of 4548 1840 Client-built.exe 93 PID 1840 wrote to memory of 4548 1840 Client-built.exe 93 PID 1840 wrote to memory of 3980 1840 Client-built.exe 95 PID 1840 wrote to memory of 3980 1840 Client-built.exe 95 PID 3980 wrote to memory of 2356 3980 Windows Host Process.exe 100 PID 3980 wrote to memory of 2356 3980 Windows Host Process.exe 100 PID 3980 wrote to memory of 4208 3980 Windows Host Process.exe 108 PID 3980 wrote to memory of 4208 3980 Windows Host Process.exe 108 PID 3980 wrote to memory of 1192 3980 Windows Host Process.exe 110 PID 3980 wrote to memory of 1192 3980 Windows Host Process.exe 110 PID 1192 wrote to memory of 2744 1192 cmd.exe 112 PID 1192 wrote to memory of 2744 1192 cmd.exe 112 PID 1192 wrote to memory of 4912 1192 cmd.exe 113 PID 1192 wrote to memory of 4912 1192 cmd.exe 113 -
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:1840 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
PID:4548
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C:\Windows\system32\Windows\Windows Host Process.exe"C:\Windows\system32\Windows\Windows Host Process.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3980 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
PID:2356
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /delete /tn "Windows Host Process" /f3⤵PID:4208
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\bx6FdaD96gxH.bat" "3⤵
- Suspicious use of WriteProcessMemory
PID:1192 -
C:\Windows\system32\chcp.comchcp 650014⤵PID:2744
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C:\Windows\system32\PING.EXEping -n 10 localhost4⤵
- System Network Configuration Discovery: Internet Connection Discovery
- Runs ping.exe
PID:4912
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4280,i,10065386245627775856,6567048529106473151,262144 --variations-seed-version --mojo-platform-channel-handle=4316 /prefetch:81⤵PID:4584
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
215B
MD5bceb5c01be57a249cb983921d8ab6409
SHA1dc7e3b73f1712958968bddb9865cefa44b1e6678
SHA25689596be1ef525b7a9db4104be661842177a9c9225b795d0efadbec6473dda978
SHA5125b7a8a3ad63bafe5359f43e92394df997695e024c0cd97683a6d22d6ab6c0d222acb8465457a47d2f87c0ed3f011a150c4db03e9fb9cceecbb0d021a0972dbb5
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Filesize
3.3MB
MD5449c9192baa7503151f8bb30aa32153b
SHA13906a9de42cb337d89e49542660f38144138d7ba
SHA2562d43f484fc7f954ecd5da337017ab2eb58c26ef39ec07e9bf5d53af63c9c4db8
SHA512c1fe393d34f2af903c755c9d18faeb71193ef6ceb285d1900c2b6df1798346f927367ab32c5b2de5f39e47b781f8a94224642effe2400323f7a0153a0c7fa624