General
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Target
Client-built.exe
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Size
3.1MB
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MD5
68a376fc7e9f5b9e51f152e9782f4431
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SHA1
876a1e862414cf310f9fda1c8728ce4c68c0b616
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SHA256
f41729681dcb0b5aa76c5d0d339c47df4fd7bdf120c64616c0851dd16d68ab9f
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SHA512
46a74afc0c8350690d0e8ef460b183848fe62ba389162476c6632afe1e93bc1b674dd00efab0fb2811acaf9b3cec18895fc498f063463b1f5a500911e6858ed1
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SSDEEP
49152:evaY52fyaSZOrPWluWBuGG5g5hHMkaC4npoGda0BTHHB72eh2NT:evv52fyaSZOrPWluWBDG5g5hHMk2
Malware Config
Extracted
quasar
1.4.1
Office04
10.0.0.34:4800
366cc5a6-9875-43f5-b406-b422373aa69b
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encryption_key
13765B0E8E4F6CB0053DA8B5123C9FA10F47987B
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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
bob
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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