General
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Target
pdf-xchange_viewer_XV-78H1.exe
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Size
2.3MB
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Sample
210620-nvtv6r37hn
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MD5
642fa01134fc21a4faa5595d45e3f554
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SHA1
53bc8673fcbb4c2e748684c2462d3f01483d8dfe
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SHA256
a1ac1de4af2199117a8218947092bd9e0e1c90f30b734dd35a92a18af6be36d6
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SHA512
c255c73abd76c9e453f8f7fe6971ca36d1a9b52494ce8c587a4210336f631967af7d048402455362121ec9d1f9fbada89c1a129bef7a592d65d4462de32bbda3
Static task
static1
Behavioral task
behavioral1
Sample
pdf-xchange_viewer_XV-78H1.exe
Resource
win7v20210408
Malware Config
Targets
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Target
pdf-xchange_viewer_XV-78H1.exe
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Size
2.3MB
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MD5
642fa01134fc21a4faa5595d45e3f554
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SHA1
53bc8673fcbb4c2e748684c2462d3f01483d8dfe
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SHA256
a1ac1de4af2199117a8218947092bd9e0e1c90f30b734dd35a92a18af6be36d6
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SHA512
c255c73abd76c9e453f8f7fe6971ca36d1a9b52494ce8c587a4210336f631967af7d048402455362121ec9d1f9fbada89c1a129bef7a592d65d4462de32bbda3
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Registers COM server for autorun
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Creates new service(s)
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Downloads MZ/PE file
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Drops file in Drivers directory
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Executes dropped EXE
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Sets service image path in registry
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Loads dropped DLL
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Adds Run key to start application
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Checks for any installed AV software in registry
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Checks installed software on the system
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Writes to the Master Boot Record (MBR)
Bootkits write to the MBR to gain persistence at a level below the operating system.
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Drops file in System32 directory
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MITRE ATT&CK Matrix ATT&CK v6
Persistence
Registry Run Keys / Startup Folder
3New Service
1Browser Extensions
1Bootkit
1Defense Evasion
Modify Registry
6Disabling Security Tools
1Install Root Certificate
1