General
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Target
Byfron.exe
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Size
3.1MB
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MD5
cb12954abfb20424cfc22e1c189ddfa9
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SHA1
dc8cb9d361cebb1a4ca13ce904cdd7136c9255c2
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SHA256
29bd747b03d4cc850e0c0733b4ff15a29ecd61de57701e4e6cc7aed90b83ef56
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SHA512
54dafd06e682eef74fd9d1377917429b1b304bb0be185f32406dbdea56d6afd8047a213f3e40191a817931077ee448993d9adc6228a1ab042fee52b9ebac611f
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SSDEEP
49152:kv8Y52fyaSZOrPWluWBuGG5g5hVtmfmzK0oGdT3THHB72eh2NT:kvF52fyaSZOrPWluWBDG5g5hVtmm
Malware Config
Extracted
quasar
1.4.1
ohio
idk:4782
5c7d6a36-dffc-4ec3-8525-ba9161772945
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encryption_key
7930C3883BFB3E417BEC9036B64E581CD2465EFE
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install_name
Byfron.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
Balls
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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 Byfron.exe
Files
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Byfron.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