General
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Target
fpsboost.exe
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Size
3.1MB
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MD5
4b0a87aa17e09b9b256778e5835df81e
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SHA1
1753d9599064cd178f2f7eb5a19a07ff16cfcb0b
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SHA256
d023fb98bf4acf159af48fc7ca89cbc961d9973951d759898c4e457551c5124a
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SHA512
d1567b26dda33b2483af88b331fa9a114eed34fcef0aca0bb6c5ecc06347eb00c5b90a0ece42d5babd66b7bd065c56a69f377dc98d9bb852c99c6af03ac95346
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SSDEEP
49152:3vCI22SsaNYfdPBldt698dBcjH01t63BxcaoGdE0THHB72eh2NT:3vP22SsaNYfdPBldt6+dBcjH06h
Malware Config
Extracted
quasar
1.4.1
Office04
10.0.0.142:4782
64ac45dd-986d-493d-bcde-8cc45c6bf3fd
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encryption_key
744A523222A399388FFCC81A069056F4C705F404
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install_name
Client.exe
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log_directory
Logs
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reconnect_delay
1
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startup_key
Quasar Client Startup
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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 fpsboost.exe
Files
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fpsboost.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