Behavioral task
behavioral1
Sample
Client-built.exe
Resource
win7-20240419-en
General
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Target
Client-built.exe
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Size
3.1MB
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MD5
1fb05ef820095ff5e3e2b983f961ab7d
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SHA1
7bcf182863f90623cbf6d421edf4ef140d7088a1
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SHA256
6cf21856443fdd0c0c6e9b65bd641b3d20449f54247010899d2dcfbadeecce73
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SHA512
c2c1191023fde2bed2c53e8a643fc99832aa7b2ee3e7be5f54a423123db0f22ea2d9f67dac924116eedfdadf93ee29c79a9945999cd06e30ee7c976653cb7bb7
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SSDEEP
49152:ivBt62XlaSFNWPjljiFa2RoUYIR/xNESEmk/iiLoGdUTHHB72eh2NT:ivr62XlaSFNWPjljiFXRoUYIhxRs
Malware Config
Extracted
quasar
1.4.1
office
2.tcp.eu.ngrok.io:16096
755f883f-4d58-4349-bc9e-f21c4e163b6f
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encryption_key
EE65D8F2E429F4900E3A17963595716D863A2455
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install_name
office.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
office 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 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