General
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Target
Client-built.exe
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Size
3.1MB
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MD5
4d037c46eaf6b2e5ae5db85ef045c0d1
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SHA1
7bc3b6647192157a2cc4894f4c58365d9932a2cf
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SHA256
c18eadfdcee5050757e12c48fc44db31612863eb37db0fbc2dcbaad7ff5ae821
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SHA512
163d60321af8d3da76d10ea550b4c792dd0b6a18abe603ab049043246b2136fb2543f8089e3e5d3fbd6e6bfcf1786f4f7b8a96cb28e353cefbe1a2553e753ab3
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SSDEEP
49152:8vGlL26AaNeWgPhlmVqvMQ7XSKGSRJ6pbR3LoGd+THHB72eh2NTf:8vGL26AaNeWgPhlmVqkQ7XSKGSRJ6rP
Malware Config
Extracted
quasar
1.4.1
Office04
192.168.1.154:4782
ba502bba-c1c8-4a0b-95e6-4b1a3d5f551e
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encryption_key
7195172212FD0C3E2300AE89FC3318C365A0CFF8
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install_name
window security.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
window security
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subdirectory
C:\Windows\System32
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: 17KB - Virtual size: 16KB
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