General
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Target
Client-built.exe
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Size
3.3MB
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MD5
8e8f5745eac3c56d32a09d56809e99bd
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SHA1
d59ee9536d644aef8e2a58c8d897d61a9a1a20af
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SHA256
ce05df66a802ab82a8a549e63bafe46905e55bbe6fcbf9a26aac3eb01f30e950
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SHA512
a60379692ac99eaaa6e4fa6442440002271fcf29c7c21c79a3e87bd469293ebe9bc1de4082276ce6647f1dfc35180617b47863297918b8a72fd5713c8d287fb5
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SSDEEP
49152:tv2lL26AaNeWgPhlmVqvMQ7XSKIqmrmzzZoGd7THHB72eh2NTr:tv2L26AaNeWgPhlmVqkQ7XSKIqmek
Malware Config
Extracted
quasar
1.4.1
byfron
192.168.112.130:4782
df713ee6-5b68-4e7e-aa35-15b1e48d3214
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encryption_key
2CB5EC3479A6A0C27E64B7436D90A3FA7E4A98FA
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install_name
WindowsUpdateHelper.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
WindowsUpdateHelper
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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: 185KB - Virtual size: 184KB
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