General
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Target
Client-built.exe
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Size
3.1MB
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MD5
c94e39405f4ff6b5e5bcd0f221f7602d
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SHA1
1ed42e129448fe9c0e078c292b9638747c82c5d7
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SHA256
20e4551dddd4f64d90e97da62dc0befde72128d2b3995e251fb12c734b5c686b
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SHA512
19f420aca31adf075dfb32897c6efdbd6aa5d1129ee110bd19411e662bb3c0eff40f44dc639a40d3a2a67eb4a3cfd7ee024589caf9604ad439b08d46745cec94
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SSDEEP
49152:WvVuf2NUaNmwzPWlvdaKM7ZxTwEjRJ6EbR3LoGdFBCTHHB72eh2NT:Wvgf2NUaNmwzPWlvdaB7ZxTwEjRJ6O
Malware Config
Extracted
quasar
1.4.1
Office04
138.0.54.91:4782
192.168.3.5:4782
208.67.222.222:4782
63563c99-67f3-4d20-8c7f-230c3d970b36
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encryption_key
E22572FBAE45F5F894074ED475A27E306499B335
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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 Link
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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