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
e231e7e16fa712910defa79ade814d98
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SHA1
2a0e9c86ec93a113de72e04c9d0194cee4e9ebf2
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SHA256
cd6ab78b3ebf7f7f3997bf6fa5b94d36cc9340c2749da42b6fe0ca26021544f9
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SHA512
dd93fe753102b5876b6e2d93fe0124b9a917d0228f728efe3bf757593f907fe4427f857a0cbd71721ec214308e3cb94f1078e5b5443641571efb47577ce6995a
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SSDEEP
49152:Pv3I22SsaNYfdPBldt698dBcjHYiRJ6pbR3LoGdkTHHB72eh2NT:Pv422SsaNYfdPBldt6+dBcjHYiRJ6r
Malware Config
Extracted
quasar
1.4.1
first
37.225.64.186:4782
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