General
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Target
Client-built.exe
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Size
3.1MB
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MD5
9c00b45ded73955c5f1585d2dacda29e
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SHA1
089ca4845ca27922cb8935a3ed55bf584e6b9d39
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SHA256
4e8b0e513cdf314182e7c8a6ac2510a450c6120ecc9c67f2ab70d182c45a4808
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SHA512
9ddecda2dd899cfc631ad0a5c4e519c12b34dd4aa8d7ce8bd87c3bcf0fc6c6ae74f0822fb8b41983a6f50a9a8682d95328ad4aa9cb61a0f23631b85480eb9042
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SSDEEP
49152:Wvkt62XlaSFNWPjljiFa2RoUYIBXX6MBxdyoGdhTHHB72eh2NT:Wv462XlaSFNWPjljiFXRoUYIx6T
Malware Config
Extracted
quasar
1.4.1
byfron
127.0.0.1:1:7131
3efcc8e1-a97e-4157-bc36-7a44aca917f4
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encryption_key
DBAD37936F3351524FEE1F8F4322BFD49CA23651
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install_name
byfron.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
byfron
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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