Behavioral task
behavioral1
Sample
Client-built.exe
Resource
win7-20240221-en
General
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Target
Client-built.exe
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Size
3.1MB
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MD5
eb8790c82d5096b84022449c2298c62a
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SHA1
12030a6f4988fb744328bc1963c7017207e40276
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SHA256
5bc8c6aa7ccb11de2b19cabc08c096025da18e7898c5e8227ef109c266820f82
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SHA512
d4d7ac397e023e6c08dfd6681e802d4c52d56a45a4e66acd53bc0138d3ed45f3930ef0d90cdeaafcf478d08ecab28cae61ffe5c571fa4c37be39497f16891464
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SSDEEP
49152:WvIt62XlaSFNWPjljiFa2RoUYIruW+dpfYoGdizZDTHHB72eh2NT:WvE62XlaSFNWPjljiFXRoUYI6W9
Malware Config
Extracted
quasar
1.4.1
Office04
192.168.1.240:4782
fcdb4cfb-dc40-4f51-b2c7-f723b5404e35
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encryption_key
1074AFFC8845D6B93DCAD37B9C170AE9CD58D08A
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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
Windowsstartup
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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