Behavioral task
behavioral1
Sample
Client-built.exe
Resource
win7-20240903-en
General
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Target
Client-built.exe
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Size
3.1MB
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MD5
7bb67714c33aa3dc9fe346b859d3ffd8
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SHA1
686b76ded3573663ad629ce10ff3e8afa3545b07
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SHA256
723d899faef9b66d299b81d62e4962ce9168d4df373ef25ea0cd95fd59a2fa70
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SHA512
33872042221e5e339703c07252f66e7329eec2fcbbc03f52d78dae4d14229a6982856ef1f3a96ee0722aa3d69a24f30a4e29143f84de09383290bd32cb599090
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SSDEEP
49152:GvHI22SsaNYfdPBldt698dBcjHUCYa95fQFk/VLoGds4THHB72eh2NT:Gvo22SsaNYfdPBldt6+dBcjH2af
Malware Config
Extracted
quasar
1.4.1
Office04
165.227.31.192:22088
111510af-51e9-4206-84d6-4a8308fcde0b
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encryption_key
58663523DF152C6BB3C05371B4C69BB5A1242833
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install_name
WindowsSubSystemForAndroid.exe
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log_directory
Logger
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reconnect_delay
3000
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startup_key
WSL Startup
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subdirectory
Roaming
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