Behavioral task
behavioral1
Sample
Client-built.exe
Resource
win7-20240221-en
General
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Target
Client-built.exe
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Size
3.1MB
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MD5
a8d386f60625a36569d271fa1a7e927e
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SHA1
9c7b3be9bde38d13a2b64f46ea0ad4609f351720
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SHA256
fb940da7e625a7e7b7d4e913f9e7acd83ba52103be0a7b98623000a48d41168e
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SHA512
aeb0d395a6e541a344459bea3c9f5aea51ef57ec089d58017eca27b7b8f2ad7a633dfdce31cbd67ad106cb71b9985e24a4b988b039e259c714aed48c82187ffc
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SSDEEP
49152:uvbI22SsaNYfdPBldt698dBcjH+ORJ6KbR3LoGdzQTHHB72eh2NT:uvk22SsaNYfdPBldt6+dBcjH+ORJ6k
Malware Config
Extracted
quasar
1.4.1
offf
91.22.255.243:4782
d3eb5eb7-abe6-4e1e-8467-07667e6bb118
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encryption_key
9954AE41F5CEAC39C977EBA3EE22C2C9481A45CC
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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 Client Startup
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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