General
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Target
Client-built.exe
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Size
3.1MB
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MD5
a7bfdffa0b5f88f5b16081746cd6f73a
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SHA1
3d31a0e592821f99735ad1677062290e1d38e648
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SHA256
19dabea0bfc499b562a1b82579ff46dd5310403cde90110d64476e6303d518e1
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SHA512
a30ee81e07463684753d884ea5da1098507d5ba972d9f6354d001c7bcf8c611930740482698330cad985ede11da82aeb120b07606368e5dadb805cd32cd660b0
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SSDEEP
49152:rvqI22SsaNYfdPBldt698dBcjHPCi1JnLoGdtTHHB72eh2NT:rvH22SsaNYfdPBldt6+dBcjHPCy
Malware Config
Extracted
quasar
1.4.1
Office04
127.0.0.1:35221
58393935-dd6f-401f-8b46-cb2948abc20e
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encryption_key
E7E8DC90EA655C9B08C3C5B00196CA0322A2C8C3
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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
Quasar 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