General
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Target
brandmar.exe
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Size
14.8MB
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Sample
231121-2s5yfshg6z
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MD5
11c31a8b40db0bac16f603ca47e5b0cf
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SHA1
f1160754ef8dea27aae887e426bd3b5c0f90722e
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SHA256
02c6afc6297dce33b1a7b9db1be1002387d0744222471657c224b763b06e03c0
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SHA512
cfaf78e625d5ed6254d3fb45bd786a937eea9b95645f58bfd37904bfe4991e2599de82266583ce7b367abd20cf87b1b52166918e02264bd5bae0d337d4fa6a7a
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SSDEEP
393216:rexbl6e6TvVmR/i+W7F/+8HVi5vcPF07zvrRl:rexZp0mRa+W7F/p1i5KF0PrR
Static task
static1
Behavioral task
behavioral1
Sample
brandmar.exe
Resource
win7-20231023-en
Behavioral task
behavioral2
Sample
brandmar.exe
Resource
win10v2004-20231025-en
Malware Config
Extracted
smokeloader
up3
Extracted
smokeloader
2020
http://host-file-host6.com/
http://host-host-file8.com/
Targets
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Target
brandmar.exe
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Size
14.8MB
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MD5
11c31a8b40db0bac16f603ca47e5b0cf
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SHA1
f1160754ef8dea27aae887e426bd3b5c0f90722e
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SHA256
02c6afc6297dce33b1a7b9db1be1002387d0744222471657c224b763b06e03c0
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SHA512
cfaf78e625d5ed6254d3fb45bd786a937eea9b95645f58bfd37904bfe4991e2599de82266583ce7b367abd20cf87b1b52166918e02264bd5bae0d337d4fa6a7a
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SSDEEP
393216:rexbl6e6TvVmR/i+W7F/+8HVi5vcPF07zvrRl:rexZp0mRa+W7F/p1i5KF0PrR
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DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
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Glupteba payload
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PrivateLoader
PrivateLoader is a downloader sold as a pay-per-install malware distribution service.
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Suspicious use of NtCreateUserProcessOtherParentProcess
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Identifies VirtualBox via ACPI registry values (likely anti-VM)
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Modifies boot configuration data using bcdedit
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XMRig Miner payload
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Downloads MZ/PE file
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Drops file in Drivers directory
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Modifies Windows Firewall
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Possible attempt to disable PatchGuard
Rootkits can use kernel patching to embed themselves in an operating system.
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Stops running service(s)
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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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Drops startup file
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Executes dropped EXE
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Loads dropped DLL
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Adds Run key to start application
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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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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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Drops file in System32 directory
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Suspicious use of NtSetInformationThreadHideFromDebugger
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Suspicious use of SetThreadContext
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
3Windows Service
3Scheduled Task/Job
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
3Windows Service
3Scheduled Task/Job
1Defense Evasion
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Impair Defenses
6Disable or Modify Tools
4Modify Registry
7Subvert Trust Controls
1Install Root Certificate
1Virtualization/Sandbox Evasion
1