General
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Target
memz_trojan_download_(destructive)
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Size
183KB
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Sample
230417-r5vcdaef57
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MD5
ab62294399f29597e150176f0991245d
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SHA1
342c2ff65c1b3361fe7276e033ab05bb6a22ce65
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SHA256
e3f703b6940042d6fdca2770167b6497e9e574e8960f2f8a6b8b428752b7958a
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SHA512
a1c4c3267bc77b01ffabcaeeff8eeb6214d6d8e354993c3bb439ed86332870eb1f691a28376c856b89e15bcea76ebb47c35c4e0f7a790767dd444f7dc9ecb447
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SSDEEP
3072:Wv+5ZPCJN0CDgs8jVcNBYL9HA5KIXLzCv4F36BUysH9S:Wv+5ZPCJNWs8jVcNBYoKIH7F36BUysHc
Static task
static1
Behavioral task
behavioral1
Sample
memz_trojan_download_(destructive).js
Resource
win10v2004-20230220-en
Malware Config
Targets
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Target
memz_trojan_download_(destructive)
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Size
183KB
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MD5
ab62294399f29597e150176f0991245d
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SHA1
342c2ff65c1b3361fe7276e033ab05bb6a22ce65
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SHA256
e3f703b6940042d6fdca2770167b6497e9e574e8960f2f8a6b8b428752b7958a
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SHA512
a1c4c3267bc77b01ffabcaeeff8eeb6214d6d8e354993c3bb439ed86332870eb1f691a28376c856b89e15bcea76ebb47c35c4e0f7a790767dd444f7dc9ecb447
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SSDEEP
3072:Wv+5ZPCJN0CDgs8jVcNBYL9HA5KIXLzCv4F36BUysH9S:Wv+5ZPCJNWs8jVcNBYoKIH7F36BUysHc
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BazarBackdoor
Stealthy backdoor targeting corporate networks, believed to be developed by Trickbot's authors.
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Bazar/Team9 Backdoor payload
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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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Modifies RDP port number used by Windows
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Sets service image path in registry
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Checks BIOS information in registry
BIOS information is often read in order to detect sandboxing environments.
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Executes dropped EXE
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Loads dropped DLL
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Modifies file permissions
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Registers COM server for autorun
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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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Drops Chrome extension
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Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
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Legitimate hosting services abused for malware hosting/C2
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Looks up external IP address via web service
Uses a legitimate IP lookup service to find the infected system's external IP.
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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 Enterprise v6
Persistence
Bootkit
1New Service
1Registry Run Keys / Startup Folder
3Scheduled Task
1Defense Evasion
Disabling Security Tools
1File and Directory Permissions Modification
1Install Root Certificate
1Modify Registry
5Web Service
1