Behavioral task
behavioral1
Sample
Client-built.exe
Resource
win7-20231129-en
General
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Target
Client-built.exe
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Size
3.1MB
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MD5
ae02283593dc891884170b46eb346a51
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SHA1
7fbb3b77f2be8fe31bca479b857d18c421edc75c
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SHA256
f4c8833b95732e318e0aa9264b6ec318f50154039775935798bbae9b9de6cafa
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SHA512
a57e2643e9dd167bd53596ac8be751cb66f7b28b87462e7fded3ee83fa8c8b962822c217fa27692e1a5252e1e862bbb758bf42e3fc8aac755019670fbdb5b66a
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SSDEEP
98304:ovxL26AaNeWgPhlmVqkQ7XSKmBRJ6BweYR:2/4SDEwpR
Malware Config
Extracted
quasar
1.4.1
Office04
littlebirdyy-26683.portmap.host:26683
91a6c51e-b9c8-459f-82b5-8fd3ea82ad14
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encryption_key
91837990C32A7683311E3E452264F10B98C1534B
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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
Microsoft Service
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subdirectory
SubDir
Signatures
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Quasar family
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Quasar payload 1 IoCs
Processes:
resource yara_rule sample family_quasar -
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
Processes:
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: 30KB - Virtual size: 29KB
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