Behavioral task
behavioral1
Sample
$77-Client.exe
Resource
win10-20240404-en
Behavioral task
behavioral2
Sample
$77-Client.exe
Resource
win10v2004-20240802-en
General
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Target
$77-Client.exe
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Size
3.1MB
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MD5
acc9e9d547efe13b2b0be13cb14aa721
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SHA1
0a859b612ab726e7de353fe25ea862b38d23401f
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SHA256
719a7b316bfd202755b62a1a832ec1ef53a731dfa7e046d0cc92a797e414450f
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SHA512
e2225f526057068e6eb2c284c9e4429fd819923e52f9f8275a743feb5bb9c8519287cd3ce698761b717df6e3c870b21ff2a1eb2a61e29438d3d6f55e14588084
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SSDEEP
49152:2vBt62XlaSFNWPjljiFa2RoUYI8ZCq1J0LoGd+1THHB72eh2NT:2vr62XlaSFNWPjljiFXRoUYIiCn
Malware Config
Extracted
quasar
1.4.1
Slave
147.185.221.20:49485
725e8cd4-7df0-4c5f-8cad-7f42a47ec93d
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encryption_key
8A741B205625DDE1631E142A4F37B4EFE8EC3980
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install_name
$77-Client.exe
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log_directory
$77-Logs
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reconnect_delay
3000
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startup_key
$77-Client
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subdirectory
$77-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 $77-Client.exe
Files
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$77-Client.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