General
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Target
RNSM00481.7z
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Size
91.0MB
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Sample
240916-rt67sssfjm
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MD5
b5fd3ccf036ee81814eee3b9f0e54643
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SHA1
7aae850b68fe3234ec0e835113db033f57ab779d
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SHA256
d73798bca8ae78c37444470da1322fe301418fb534417877d988751bf1da5e18
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SHA512
f900ad590f822410eb30c9a43b886eae95aa0af44dba2a5bf8779471df410ae4ddf19328c17a5a3578a1fde272771231c9b5ea53218d44e925936d3be264ee90
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SSDEEP
1572864:MN+sx1CnlGBt7cSjEZn+G6Yawe/IO1ZT5K605B5W79ldy2IkuNcyaG9fA:Mwsx1ulyBCnYYaw8/T5wBQ/uNfaIA
Static task
static1
Behavioral task
behavioral1
Sample
RNSM00481.7z
Resource
win10v2004-20240802-en
Malware Config
Extracted
C:\ProgramData\Package Cache\{4d8dcf8c-a72a-43e1-9833-c12724db736e}\ReadMe.txt
Extracted
C:\ProgramData\Package Cache\{ef5af41f-d68c-48f7-bfb0-5055718601fc}\ReadMe.txt
Extracted
agenttesla
https://api.telegram.org/bot1923270472:AAFHljVp-f8Q5-X0iy70Vfe0aTch5THPa-U/sendDocument
Extracted
C:\WzEgyMggM.README.txt
blackmatter
http://blackmax7su6mbwtcyo3xwtpfxpm356jjqrs34y4crcytpw7mifuedyd.onion/WBO0PqltgJ/46f53c1a25a576184e0429cd24bfcd36
http://supp24yy6a66hwszu2piygicgwzdtbwftb76htfj7vnip3getgqnzxid.onion/LA60VOT96UX8HHOG
Extracted
C:\info.hta
class='mark'>[email protected]</span></div>
class='mark'>[email protected]
[email protected]</span></div>
http://www.w3.org/TR/html4/strict.dtd'>
Targets
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Target
RNSM00481.7z
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Size
91.0MB
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MD5
b5fd3ccf036ee81814eee3b9f0e54643
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SHA1
7aae850b68fe3234ec0e835113db033f57ab779d
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SHA256
d73798bca8ae78c37444470da1322fe301418fb534417877d988751bf1da5e18
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SHA512
f900ad590f822410eb30c9a43b886eae95aa0af44dba2a5bf8779471df410ae4ddf19328c17a5a3578a1fde272771231c9b5ea53218d44e925936d3be264ee90
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SSDEEP
1572864:MN+sx1CnlGBt7cSjEZn+G6Yawe/IO1ZT5K605B5W79ldy2IkuNcyaG9fA:Mwsx1ulyBCnYYaw8/T5wBQ/uNfaIA
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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BlackMatter Ransomware
BlackMatter ransomware group claims to be Darkside and REvil succesor.
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Detected Mount Locker ransomware
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Detects Zeppelin payload
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GandCrab payload
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Modifies WinLogon for persistence
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MountLocker Ransomware
Ransomware family first seen in late 2020, which threatens to leak files if ransom is not paid.
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Zeppelin Ransomware
Ransomware-as-a-service (RaaS) written in Delphi and first seen in 2019.
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AgentTesla payload
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Deletes shadow copies
Ransomware often targets backup files to inhibit system recovery.
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Modifies boot configuration data using bcdedit
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Command and Scripting Interpreter: PowerShell
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
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Disables Task Manager via registry modification
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Modifies Windows Firewall
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Possible privilege escalation attempt
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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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Modifies file permissions
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Adds Run key to start application
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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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Indicator Removal: File Deletion
Adversaries may delete files left behind by the actions of their intrusion activity.
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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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Uses Tor communications
Malware can proxy its traffic through Tor for more anonymity.
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Sets desktop wallpaper using registry
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MITRE ATT&CK Enterprise v15
Execution
Command and Scripting Interpreter
3PowerShell
1Scheduled Task/Job
1Scheduled Task
1Windows Management Instrumentation
1Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Create or Modify System Process
1Windows Service
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Create or Modify System Process
1Windows Service
1Scheduled Task/Job
1Scheduled Task
1Defense Evasion
Direct Volume Access
1File and Directory Permissions Modification
1Hide Artifacts
1Hidden Files and Directories
1Impair Defenses
1Disable or Modify System Firewall
1Indicator Removal
4File Deletion
4Modify Registry
3