General
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Target
LastExternal.exe
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Size
3.1MB
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MD5
d89bcb84ff94321d131f8f826a7177f5
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SHA1
3612cb183adeb6225f7ae0ac4425e8072baebb9c
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SHA256
7c7d0a81bb0037aa2d509217e0464572444cb79154470e72f364755fab99b7d4
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SHA512
2830d50245e266338a90163e9945a91623bc839d0d4657cdd6d6d8b8970c981e0eeaa1778f2ed5ecf61bcd870c03aa0a9d2e6dce0be461d13e6dfad17db7cf0d
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SSDEEP
49152:yv6Y52fyaSZOrPWluWBuGG5g5h0kxG1v1LoGKd+THHB72eh2NT:yvP52fyaSZOrPWluWBDG5g5h0kxK
Malware Config
Extracted
quasar
1.4.1
Cw2
127.0.0.1:8080
eeb96fcd-c654-4ba2-9a84-d3d5cfa5eee3
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encryption_key
7A857EF3A3EB39AF399F1F3800FB9F842DC83C9E
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install_name
Client.exe
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log_directory
Logs
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reconnect_delay
1
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startup_key
W
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subdirectory
SubDir
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 LastExternal.exe
Files
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LastExternal.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