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General
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Target
vcac.exe
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Size
24.2MB
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Sample
231011-f1gpyadf85
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MD5
60db2af267aaa16ab82007ce5dc80685
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SHA1
2c9ea81aac005653e0f49deaf7635d69300ef644
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SHA256
e4b0092942132b80858e5364222a3da3303456764192aeb3717311b54610b7fd
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SHA512
3b127f1f0cc3381a61344cc319e2d99af1a906717c485972df881096a36b7c567c26d71b65424d34e4ca84624ee8924de6bf376edb47c819cadf2d6b93a9d101
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SSDEEP
98304:qKBbBWIgWljGxRB/LL6vc22SsaNYfdPBldt6+dBcjHVCU688cIyGOk3ta:P4xRBjgB7j4U6gl
Behavioral task
behavioral1
Sample
vcac.exe
Resource
win7-20230831-en
Malware Config
Extracted
quasar
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reconnect_delay
1
Targets
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Target
vcac.exe
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Size
24.2MB
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MD5
60db2af267aaa16ab82007ce5dc80685
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SHA1
2c9ea81aac005653e0f49deaf7635d69300ef644
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SHA256
e4b0092942132b80858e5364222a3da3303456764192aeb3717311b54610b7fd
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SHA512
3b127f1f0cc3381a61344cc319e2d99af1a906717c485972df881096a36b7c567c26d71b65424d34e4ca84624ee8924de6bf376edb47c819cadf2d6b93a9d101
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SSDEEP
98304:qKBbBWIgWljGxRB/LL6vc22SsaNYfdPBldt6+dBcjHVCU688cIyGOk3ta:P4xRBjgB7j4U6gl
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Quasar payload
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Possible privilege escalation attempt
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Drops startup file
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Executes dropped EXE
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Loads dropped DLL
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Modifies file permissions
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Adds Run key to start application
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Legitimate hosting services abused for malware hosting/C2
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Writes to the Master Boot Record (MBR)
Bootkits write to the MBR to gain persistence at a level below the operating system.
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Drops file in System32 directory
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Pre-OS Boot
1Bootkit
1Scheduled Task/Job
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1