General
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Target
Client-built.exe
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Size
3.1MB
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MD5
cb9e331e962b60a93e14496d120515b3
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SHA1
51ecbe795ea6e156c061dd91afc2c1bc6e8adcb4
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SHA256
9b4870baf1a6e62580daceb460672b03cc4c002267686340969fd55aab71bbd7
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SHA512
6b9b6294de1308ebc902f48f4d3de77afef27a45d5eb6cffa256a765d6b22d09184411bed0029420379f4fd22c4b137c0b6d12ef97d4a7b18d59d7ea6a2317ef
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SSDEEP
49152:OT2vSuS4j2WraxltyP5luXSvnA5dosAmc67BxtWoGdlTHHB72eh2NT:OTASuS4j2WraxltyP5luXS/A5dose6A
Malware Config
Extracted
quasar
1.4.1
Office04
nexosmith1231-54169.portmap.host:54169
607f231f-37d7-40a6-8790-f623e2b7c3d5
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encryption_key
57AD3106034C3A8FFC913D430F88F63E17B5BC5D
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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
Quasar Client Startup
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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