General
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Target
Client-built.exe
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Size
3.1MB
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MD5
ed07568d5264b51a52a4b4b35dd45f29
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SHA1
0b71c45db5976940e042834e8adc1acf0db7bb38
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SHA256
8b38789a6d9604f9315c77d58b7d214050604f72917e66e1a0a047e8403d20b2
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SHA512
9d4c39cadc6ee0321e20592556cdb99aa61719d7e70c1592ac461790331303e9ced4e19e8516d074117a1aa17b2de184f9a80e5c1acd4f9d1a91743ed2f2dd83
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SSDEEP
49152:WvRt62XlaSFNWPjljiFa2RoUYIzZ43+arRLoGd8THHB72eh2NT:Wvb62XlaSFNWPjljiFXRoUYI+3J
Malware Config
Extracted
quasar
1.4.1
Office04
127.0.0.1:4782
f7007fc1-3c9f-44f5-9f4a-a1b906b51b44
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encryption_key
97E9CFF0CDEC31A610D73E8D91954B5BF77F8F47
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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
Windows Update Checker
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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