Behavioral task
behavioral1
Sample
Client-built.exe
Resource
win7-20241023-en
General
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Target
Client-built.exe
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Size
3.1MB
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MD5
9ff508735b3785e3697ad97896820845
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SHA1
01c2d68abbac2caefc163d389f43ec53798952cb
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SHA256
6470715a18148c46c345978216785766d8fa1548d3378dda685146d6e5cd6c7f
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SHA512
cf9ae7a63f1988c614d75b71da7244d3ea046120868dec2f6d85debd1d454a55531294da3cd02fb7e2fb02cca7f4457f819c06f9600dcc9940b11f45ea5c427b
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SSDEEP
49152:2vht62XlaSFNWPjljiFa2RoUYITrgCjhdGoGddTHHB72eh2NT:2vL62XlaSFNWPjljiFXRoUYITrgP
Malware Config
Extracted
quasar
1.4.1
Office04
192.168.1.82:4782
3783d7ca-3a06-404f-a250-4e9a22f8ac32
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encryption_key
47D9E81F01D52C405867EC357C00214579A008BB
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install_name
sysupdate32.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
sysupdate32
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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