Behavioral task
behavioral1
Sample
Client-built.exe
Resource
win7-20241010-en
General
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Target
Client-built.exe
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Size
3.1MB
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MD5
4cc332d69d4f37340aabf54173ae8365
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SHA1
072242c54690924193b29fe8ffb046bef8d393a1
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SHA256
1e9796e9439e51cac6936a87fb043cf85d837ece6f26e383bb39e68e1a40d3e5
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SHA512
50817fb9f83135156b79b97aa64c753be3495195f16f6acf456961669b4a09b6862dce4da77f61af4cbf01acc0d580d7fde106642098c6291a0982b407f29905
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SSDEEP
49152:CvmI22SsaNYfdPBldt698dBcjHsCS1JmLoGd1THHB72eh2NT:Cvr22SsaNYfdPBldt6+dBcjHsC1
Malware Config
Extracted
quasar
1.4.1
Office04
5.20.104.111:4782
beca179f-e7d8-40de-ba85-d1fd906529dd
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encryption_key
66CB84A8DB676E9F5F54FDDB146D727FB936CCFD
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install_name
Client.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
Microsoft Defender
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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