Behavioral task
behavioral1
Sample
Client-built.exe
Resource
win10-20240404-en
Behavioral task
behavioral2
Sample
Client-built.exe
Resource
win10v2004-20240426-en
General
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Target
Client-built.exe
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Size
3.1MB
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MD5
dd2f556310eccb91f1b3a3b3d7c52c44
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SHA1
c0032a0894ea23bba4dc36e37dd26eca25e1ac81
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SHA256
3797626bb8fb9703283002f9fe59c8e0b55292a180efdae1b8b3faace9f6c899
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SHA512
79a11a3154894485cec74c202105653deb1c53d19ef26f1b33214fda58e52a01774f3c6d332c8068a94c08ffa2afc02c8dca8d2ad10c2d98d219792ab019f1a3
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SSDEEP
49152:zvelL26AaNeWgPhlmVqvMQ7XSKOqRJ6kbR3LoGd9uTHHB72eh2NT:zvOL26AaNeWgPhlmVqkQ7XSKOqRJ6u
Malware Config
Extracted
quasar
1.4.1
FUD
runderscore00-61208.portmap.host:61208
41104e3a-44c7-4cb0-8bde-1a3c82e695fa
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encryption_key
0185F96AF587188E173301C437AB89C8912A9718
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install_name
$sxr-powershell.exe
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log_directory
$sxr-Logs
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reconnect_delay
3000
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startup_key
Powershell
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subdirectory
$sxr-seroxen2
Signatures
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Quasar family
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Quasar payload 1 IoCs
Processes:
resource yara_rule sample family_quasar -
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
Processes:
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