Behavioral task
behavioral1
Sample
Client-built.exe
Resource
win7-20231023-en
General
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Target
Client-built.exe
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Size
349KB
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MD5
2207ba09525cf5c4b7b7e09359bd6118
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SHA1
2c266c94899b4cb038e812ed1c067b47979399bd
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SHA256
fe00b66746e04dc422da7033d22c5c4f516a41713de90c61580d4e4ec30469ed
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SHA512
628a46802656589b4b90285b927756f9855718487bc317b194304d751cf9b8262fa1f9c805ae5b194b4f279f17ef02b4cab370a6e728aef8f6bb992d3a6eadeb
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SSDEEP
6144:FKMJx4pweP7kJS3iCxPMQ0PTCo6t6RXzxNTpGbGttZoap9O:FKoS5xM3PTCoa6Jz9btkm9O
Malware Config
Extracted
quasar
1.3.0.0
Office04
223.27.104.5:4782
QSR_MUTEX_TKIGmUQNaov60j8Osd
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encryption_key
fNvCkOKAiWAMHbrA0e7Y
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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 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: 346KB - Virtual size: 345KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rsrc Size: 2KB - 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