General
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Target
Client-built.exe
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Size
3.1MB
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MD5
71a0c5a5adf0e31a9a7d5049df30a0c9
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SHA1
254b10c776de6eb00bb4f8bd6af6f2fad7504d93
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SHA256
40c3cebca3629128e5dcce153360e7063ce9cec2772cefeb54c27b439933b3f9
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SHA512
22446cf5b4bbad57476c48e7874ccb9fae1b81d76bfeba401db0b53e780bfbd8f75fd96cffe39481924e8a3927826be032dbefc658b69b3967abeeb736edd20a
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SSDEEP
49152:KvOI22SsaNYfdPBldt698dBcjHXtIvNno/dGNTHHB72eh2NT:Kvj22SsaNYfdPBldt6+dBcjHdIvh
Malware Config
Extracted
quasar
1.4.1
Optimizer
Sanael-41038.portmap.host:41038
837a9b4d-50cb-4e50-a095-4855bd7434de
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encryption_key
CCDD1275F74D60DB1CA20789B7A96E00FB350813
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install_name
clean.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
Nexus Optimizer
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subdirectory
Optimizer
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