Behavioral task
behavioral1
Sample
Client-built.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
Client-built.exe
Resource
win10-20240221-en
Behavioral task
behavioral3
Sample
Client-built.exe
Resource
win10v2004-20240319-en
General
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Target
Client-built.exe
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Size
3.1MB
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MD5
6efb136f01bd7beeec9603924b79f5d0
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SHA1
8794dd0e858759eea062ebc227417f712a8d2af0
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SHA256
3ad07a1878c8b77f9fc0143d8f88c240d8d0b986d015d4c0cd881ad9c0d572e1
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SHA512
102ca624f0fefff74f4e9a6d5a173861b3887f24e608245370adabc11cd385805ed18f5208ab5a33f05131a42edf04d234b146184e954e9d83f40b8149353548
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SSDEEP
49152:2vtt62XlaSFNWPjljiFa2RoUYInH8FEFUCk/bvLoGdrjTHHB72eh2NT:2vP62XlaSFNWPjljiFXRoUYIH8dz
Malware Config
Extracted
quasar
1.4.1
Office04
91.92.254.40:4782
56928f7b-c5c9-4b24-af59-8c509ce1d27e
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encryption_key
60574F1741A0786C827AF49C652AB3A7DA0533D1
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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
Windows System
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subdirectory
SubDir
Signatures
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Quasar family
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Quasar payload 1 IoCs
resource yara_rule sample family_quasar -
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource Client-built.exe
Files
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Client-built.exe.exe windows:4 windows x86 arch:x86
f34d5f2d4577ed6d9ceec516c1f5a744
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_NO_SEH
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE
Imports
mscoree
_CorExeMain
Sections
.text Size: 3.1MB - Virtual size: 3.1MB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rsrc Size: 3KB - Virtual size: 2KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 512B - Virtual size: 12B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ