Behavioral task
behavioral1
Sample
stub.exe
Resource
win7-20240705-en
General
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Target
stub.exe
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Size
3.1MB
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MD5
38be66c3ba0ace4e34f571548609a10b
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SHA1
24296cadea958c17d84d217aaa7d266b9da7d662
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SHA256
0493069631426138f6273d4977d58cf1f2a28c4b78f16484079e9cff5a686af4
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SHA512
523b22089a80edff7a59ce9cc2fd6d0513abcb346f7872c10c2f5e46434ac64c83eca58a1b3c417bee6dd10730c364019efc84bdaba58a64429356fa9ac83392
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SSDEEP
49152:1OTNHwW6Z4TIlgjQ9saFMxJWt1VLTHHB72eh2NT:1Gd6ZAIlgjQ9saWv
Malware Config
Extracted
quasar
1.4.1
Office04
147.185.221.20:9835
b4d50a7e-6565-4a91-88b4-651c141cfd4f
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encryption_key
99DD896C463A5DEFC60E5185D43A6893ACB75CFB
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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 stub.exe
Files
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stub.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