Behavioral task
behavioral1
Sample
Bootstrapper_v2.19 (3).exe
Resource
win7-20241023-en
Behavioral task
behavioral2
Sample
Bootstrapper_v2.19 (3).exe
Resource
win10v2004-20250129-en
General
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Target
Bootstrapper_v2.19 (3).exe
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Size
3.1MB
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MD5
ef984ec5aacb3939bbe64180c7e1f84c
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SHA1
25eb03b44465cd9b44da6d422df703bb41abd0e1
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SHA256
9a67ba0b0977ff291dc341c37a862d73242d005d5ac38ad1e7583f2d30273d41
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SHA512
d338d4ddb9073e2aebbf29a20ae83c02e979e4284d85dc905506dd098d36aa94f39483895f3e96619d33aad2dd34f537acf42eb6ba00756441d699eefff956d6
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SSDEEP
49152:3vSI22SsaNYfdPBldt698dBcjHbqRJ65bR3LoGdLTHHB72eh2NT:3v/22SsaNYfdPBldt6+dBcjHbqRJ67
Malware Config
Extracted
quasar
1.4.1
Office04
26.20.187.152:4782
035609b7-5296-42b1-ba51-47722e1900ad
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encryption_key
EF9AF063C4E9C62FBBA2D6F12350A5C2F573D811
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install_name
Bootstrapper_v2.19.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
Microsoft
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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 Bootstrapper_v2.19 (3).exe
Files
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Bootstrapper_v2.19 (3).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