General
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Target
RNSM00431.7z
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Size
21.6MB
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Sample
241026-pv82nssjcr
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MD5
51b913c77686e4d72c6754fe38eb847d
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SHA1
33085b7950a0200a22a2c7f5ac7edd2c2cfed2ea
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SHA256
df972b858ff10bcabbcef5ec116549330919b30d5be3cd5aaefef3e8e33726a6
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SHA512
efb2431c3408deb0f707f55bec8a11432aa2bee55395f2776d58e48875591dc816fc5c562e91133bea43ea60cb5463c2b2982fbea80f3f776174d6628a984bca
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SSDEEP
393216:0xeeAqc18J3CjLlhFUxA4zILUS5bvPsgYSk0Fg2zYBgtR7BSQM5pwuxNzSy2AHm:0xeeQA3slhFUOHNF5bkVuaux0y4RN2AG
Static task
static1
Behavioral task
behavioral1
Sample
RNSM00431.7z
Resource
win10v2004-20241007-en
Malware Config
Targets
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Target
RNSM00431.7z
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Size
21.6MB
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MD5
51b913c77686e4d72c6754fe38eb847d
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SHA1
33085b7950a0200a22a2c7f5ac7edd2c2cfed2ea
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SHA256
df972b858ff10bcabbcef5ec116549330919b30d5be3cd5aaefef3e8e33726a6
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SHA512
efb2431c3408deb0f707f55bec8a11432aa2bee55395f2776d58e48875591dc816fc5c562e91133bea43ea60cb5463c2b2982fbea80f3f776174d6628a984bca
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SSDEEP
393216:0xeeAqc18J3CjLlhFUxA4zILUS5bvPsgYSk0Fg2zYBgtR7BSQM5pwuxNzSy2AHm:0xeeQA3slhFUOHNF5bkVuaux0y4RN2AG
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Asyncrat family
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Modifies WinLogon for persistence
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Detected Nirsoft tools
Free utilities often used by attackers which can steal passwords, product keys, etc.
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NirSoft WebBrowserPassView
Password recovery tool for various web browsers
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Renames multiple (2195) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Disables Task Manager via registry modification
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Credentials from Password Stores: Windows Credential Manager
Suspicious access to Credentials History.
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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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Drops desktop.ini file(s)
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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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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 autorun.inf file
Malware can abuse Windows Autorun to spread further via attached volumes.
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Sets desktop wallpaper using registry
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Credential Access
Credentials from Password Stores
2Credentials from Web Browsers
1Windows Credential Manager
1Unsecured Credentials
1Credentials In Files
1