General
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Target
Client-built.exe
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Size
3.1MB
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MD5
bedf425c4a05bbe1630911df57e7df6a
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SHA1
4a9a36f51659ae39c9df7a43f509eccc948395b3
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SHA256
acc6975d71b6a5d2c58b54133f607cf3ecae828b2c92dde00870e48bf95b50ae
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SHA512
aa95f53cc3f4a1ecfec8a5ffc9763279768cb4f45109d583549dc2aa3caf63ed37811f97e5c70954aec31cdf199974860f60dc42421ba0160711b63b229eb814
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SSDEEP
49152:bv3I22SsaNYfdPBldt698dBcjHQ0W+sizoGdK0THHB72eh2NT:bv422SsaNYfdPBldt6+dBcjHTW+s26
Malware Config
Extracted
quasar
1.4.1
first
ZyloX-37288.portmap.host:4782
44382739-6e8e-4a03-b838-6ed9f8f4bf36
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encryption_key
59DD70006F5E5424ACBA442199524AA9815F439E
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install_name
Calculator.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
RtkAudUService86
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subdirectory
Calculator_UWP
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