Behavioral task
behavioral1
Sample
stub.exe
Resource
win7-20240704-en
General
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Target
stub.exe
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Size
3.1MB
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MD5
7f46a0abc34c2aa3ee8f1c5eaf9a06b5
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SHA1
b2a12244830c3f629b6e64ce475f0e69642342bd
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SHA256
9a5f6590db3998e9ddb4db7ac0bc83f648a62510042125cbc18a254fe2c3999b
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SHA512
b0b5faecd08c7efe8a90d4938df3ee2920f41dced9f652b828cbc314418ef22dfe3bb7fbe33328024296ebf632dacd67a977b5aa7279ee76f7838f385af1eb95
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SSDEEP
49152:hOTs6oxVdIbbUGIDFCug4vJWt1nTHHB72eh2NT:hGyVdI/UGIDFCug4x
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