General
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Target
CatClient.exe
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Size
3.1MB
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MD5
8eb39f19628f17443965a12581b797cd
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SHA1
d61da7ff18f902f92007469b8dcd0d12717d5467
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SHA256
36b4e99d908e219e6bd63531e92745428ccad3cf48b25ac5af1b8af2bfc72301
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SHA512
178fbf3e21dfa7f41c196fe924174943811360b5f22ae077b119402eb1d6024ed25bede750083bc3a9c12319aa9e476eae34fd478b9fd58d72f86ab8f001745d
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SSDEEP
49152:qvdt62XlaSFNWPjljiFa2RoUYI5bHZmzXzoGdziTHHB72eh2NT:qvf62XlaSFNWPjljiFXRoUYI5bHOD
Malware Config
Extracted
quasar
1.4.1
ForHefSus
14.167.99.222:2801
139c249c-088f-44e1-bf81-855136c050c2
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encryption_key
3A98AFBF624611E0E6774B656D289B2554336F31
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install_name
CatClient.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
CatClient
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subdirectory
Client
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 CatClient.exe
Files
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CatClient.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