Behavioral task
behavioral1
Sample
Client-built.exe
Resource
win7-20240221-en
General
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Target
Client-built.exe
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Size
3.1MB
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MD5
5553dd5373c45a244ef0cfb4fd43556d
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SHA1
9b68a5a8c279c7894cf6b5b9435387e8d0fba630
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SHA256
eececbd1367c8ea656d97dad092f26fd6cf17c43220d21a1dc6792804319271a
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SHA512
0267245f56e3b604392082ccb051c0ff0a821319adcf076e97535db82d2a1af7401bc2069d392f05e572b4d0e2b1c9b8cff52fb221ce67eedf62d58f4f690f68
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SSDEEP
49152:fvtlL26AaNeWgPhlmVqvMQ7XSKcaH4jGd1THHB72eh2NT:fvTL26AaNeWgPhlmVqkQ7XSKcaY
Malware Config
Extracted
quasar
1.4.1
offices
xduser-38429.portmap.host:38429
be542dd0-53d2-4e9f-b697-eb7286a0c131
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encryption_key
31F1F6BB9519EE91794FC1867439C916B78A09B6
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install_name
mscvrthost.exe
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log_directory
Logs
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reconnect_delay
200
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startup_key
PC updates check
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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: 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