General
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Target
YsterBeta (1).exe
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Size
3.1MB
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MD5
67ac5cc1e6f46f67a60ce5c60915d6d2
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SHA1
293dc38dfac829e1e48aa5140800b8aad8c1eea0
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SHA256
0ad0e315dd7377012efdd217452ec0b9d6de9556905f8120bb9f8b81a5be3b64
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SHA512
2f6f4fd380535f5995370a553980cbd7b2ad68ed96d1fc86d6a5312fbb451fddcb7d72c8902ba00f16f036f7562ff7fb48d953e589f6946e40d0a88d98f7a1e4
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SSDEEP
49152:rvyI22SsaNYfdPBldt698dBcjHUb80bRALoGduETHHB72eh2NT:rvf22SsaNYfdPBldt6+dBcjHUb8r+
Malware Config
Extracted
quasar
1.4.1
1
192.168.1.206:4782
3d594109-9b96-448b-a42f-083e0f32532c
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encryption_key
2356FE514435520CC763B0676425361D32814C71
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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
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 YsterBeta (1).exe
Files
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YsterBeta (1).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