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
024cac9d34863ba8681ba53a22974d8b
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SHA1
f64ade2a2546caf8f1d7602d89ae22d014e43ae8
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SHA256
891d704ca82b9d6aceb0c42948c7f2a958ad3f0a543c88a8700607a0d0ee3a40
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SHA512
427c83d469c8c3ee542e999476aaafe4004eeff102ca6afb91e4ae0f9a8308e6b9619b08230a652204b991e8a140ef07529a127998f72a6db8dc462fd6de4cb3
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SSDEEP
49152:KvyI22SsaNYfdPBldt698dBcjHLFRJ6IbR3LoGdkTHHB72eh2NT:Kvf22SsaNYfdPBldt6+dBcjHLFRJ6i
Malware Config
Extracted
quasar
1.4.1
Office04
86.13.66.89:4782
584f887c-7024-4e16-a56b-684919f2613f
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encryption_key
F478C43DE74A681AD4F5AF6B28E598051B310CDC
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install_name
WPShell.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
Windows PowerShell
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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