General
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Target
Client-built.exe
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Size
3.1MB
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MD5
5b2ccc8a8d94dde2f51b8311e2548255
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SHA1
22edf1e9abd6902e1c9b424a548b6d52df20ae22
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SHA256
df11dd094952f12ea053085c7a7801326a58dc2ce42570b35b2fec98a7801808
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SHA512
78c8c5d54be2926744351846723903da6e51d517b70f1aac7312a6f29ce64663eb39db905a343a5ddef235c26d093c3e97bbd21abc27ebdf1bc4de257bb4a861
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SSDEEP
49152:DvRuf2NUaNmwzPWlvdaKM7ZxTwUsEdGWBeLLoBdLTHHB72eh2NT:Dvsf2NUaNmwzPWlvdaB7ZxTwUlGl
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