Behavioral task
behavioral1
Sample
Client-built.exe
Resource
win7-20240903-en
General
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Target
Client-built.exe
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Size
3.1MB
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MD5
00cafff0e897b2ac4d0bb4ea8171f87a
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SHA1
fa6224090a7a53f328f7bf74072776ce991f01bb
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SHA256
71db00e41487326acc2eb737a22faa26011d78ba242c408b108b0f7b8124b9f0
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SHA512
d4fb8277d5b48176542f318eaf9f202a12cc8a3a3bc825245bcda73ea78c6e4c2d6be2013901e5cb1c369f8eb86934bb4990781fd7b60681928e447761cc6979
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SSDEEP
49152:7v3lL26AaNeWgPhlmVqvMQ7XSKQERJ6BbR3LoGd6THHB72eh2NT:7v1L26AaNeWgPhlmVqkQ7XSKQERJ6j
Malware Config
Extracted
quasar
1.4.1
first
quasartestingxxx.hopto.org:4782
44382739-6e8e-4a03-b838-6ed9f8f4bf36
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encryption_key
59DD70006F5E5424ACBA442199524AA9815F439E
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install_name
Calculator.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
RtkAudUService86
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subdirectory
Calculator_UWP
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