Analysis
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max time kernel
101s -
max time network
146s -
platform
windows11-21h2_x64 -
resource
win11-20250313-en -
resource tags
arch:x64arch:x86image:win11-20250313-enlocale:en-usos:windows11-21h2-x64system -
submitted
28/03/2025, 09:58
Static task
static1
Behavioral task
behavioral1
Sample
GTAC-Server-Win32-1.7.0.zip
Resource
win11-20250313-en
Behavioral task
behavioral2
Sample
GTAC-Server-Win32-1.7.0.zip
Resource
win7-20240903-en
General
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Target
GTAC-Server-Win32-1.7.0.zip
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Size
8.1MB
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MD5
5b5ab0f3d0748132c9d5ac29ffa7d4ed
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SHA1
a98e900d05e3d72fc3493f832d00771811ebddef
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SHA256
1ebefbd518bca8250bfaa65253f49085d68f7dc98b916f3a6dde487402a8be86
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SHA512
8991b14d172b2445815badf085e899d368b60a4e1978bd37e647750d13524f34818c3035ad85151fdcea3d23d863e6c1438173be60d18fcb4e2bd5098360f59a
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SSDEEP
196608:mSLKBkqWl9IPm5kXwI63dHkUCxX1ue70pmnfXaModIPP6vKsrtbb5Z:+218mhHR2l7Q7dhrNb5Z
Malware Config
Signatures
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Modifies registry class 4 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3712238951-2226310826-298817577-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\History\CachePrefix = "Visited:" BackgroundTransferHost.exe Key created \REGISTRY\USER\S-1-5-21-3712238951-2226310826-298817577-1000_Classes\Local Settings\MuiCache BackgroundTransferHost.exe Set value (str) \REGISTRY\USER\S-1-5-21-3712238951-2226310826-298817577-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\Content\CachePrefix BackgroundTransferHost.exe Set value (str) \REGISTRY\USER\S-1-5-21-3712238951-2226310826-298817577-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\Cookies\CachePrefix = "Cookie:" BackgroundTransferHost.exe
Processes
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C:\Windows\Explorer.exeC:\Windows\Explorer.exe /idlist,,C:\Users\Admin\AppData\Local\Temp\GTAC-Server-Win32-1.7.0.zip1⤵PID:5464
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C:\Windows\system32\BackgroundTransferHost.exe"BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.131⤵
- Modifies registry class
PID:3824
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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:6004
Network
MITRE ATT&CK Matrix
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\AC\BackgroundTransferApi\ad0a66c9-0822-4925-a516-7a20e4061071.down_data
Filesize555KB
MD55683c0028832cae4ef93ca39c8ac5029
SHA1248755e4e1db552e0b6f8651b04ca6d1b31a86fb
SHA256855abd360d8a8d6974eba92b70cbd09ce519bc8773439993f9ab37cb6847309e
SHA512aba434bd29be191c823b02ea9b639beb10647bbe7759bbffdaa790dfb1ec2c58d74c525ef11aacda209e4effe322d1d3a07b115446c8914b07a3bce4d8a0e2c3