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
bb7a42f4595499e4cd801eacb252cae8
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SHA1
bd19e59cd8203d29fa232ea026189d245e07e886
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SHA256
f1360aa4d9adeff9ccff753f2996be1b827d7bc3a79549cc6635346ce3eb1da2
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SHA512
29f160c2a84e8b3dd86ba62e65e8d91d782f7b347900eb72198012af40353986e2ce01a85cbf288a6146192cdb12450e0ec72024a675509ee6c9e6d089bb2449
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SSDEEP
49152:mvRuf2NUaNmwzPWlvdaKM7ZxTwkQRJ6FbR3LoGd/ITHHB72eh2NT:mvsf2NUaNmwzPWlvdaB7ZxTwkQRJ6X
Malware Config
Extracted
quasar
1.4.1
Slave
140.238.91.110:38899
uk2.localto.net:38899:38899
276d9dc6-b19c-4958-8ac3-89586bd3b515
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encryption_key
ABCF70C37D1A79A01712038122D1532DF20DF72A
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install_name
Client.exe
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log_directory
Error Logs
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reconnect_delay
3000
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startup_key
WOS64
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subdirectory
Windows
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