General
- Target SteamUpdate.exe 1.23.5-7.89.msi
- Size 96.5MB
- Sample260602-24s32af16m
- SHA256 0b303d320b87fb4de99537b1651eb27020a0e94fe8720a0a2b5332a135c6ade5
- MD5 5c68ec0a481d4cc2d8c9cdbed5303b6c
- SHA1 fe4b8fbb13d0e1271ffd7013342dec8169cf1064
- SHA512 1b9932d33e82dea2494115f4c06db28629f5be2f5c6d45363530aea47f26cd07d7b0866d03ae860cd26fb26bc052112ec7bb6dac5719085415a71bb48285adc7
- SSDEEP 3145728:CUrkKPAYXqEFvqdlFLlYmyGW0UKRSyLFxP2:CUdhXqwvaHlYm1W0UiXLLP
- TLSH T1842833577751D77AC05CAC3F34327579D313CE0A089824AAA86ABD08057B768263FBF9
- MD5 SHA1 SHA512 SSDEEP TLSH
Static task
static1
Behavioral task
behavioral1
Sample
SteamUpdate.exe 1.23.5-7.89.msi
Resource
win10v2004-20260513-en
Behavioral task
behavioral2
Sample
SteamUpdate.exe 1.23.5-7.89.msi
Resource
win10ltsc2021-20260513-en
Behavioral task
behavioral3
Sample
SteamUpdate.exe 1.23.5-7.89.msi
Resource
win11-20260513-en
Malware Config
Targets
-
- Target SteamUpdate.exe 1.23.5-7.89.msi
- Size 96.5MB
- SHA256 0b303d320b87fb4de99537b1651eb27020a0e94fe8720a0a2b5332a135c6ade5
- MD5 5c68ec0a481d4cc2d8c9cdbed5303b6c
- SHA1 fe4b8fbb13d0e1271ffd7013342dec8169cf1064
- SHA512 1b9932d33e82dea2494115f4c06db28629f5be2f5c6d45363530aea47f26cd07d7b0866d03ae860cd26fb26bc052112ec7bb6dac5719085415a71bb48285adc7
- SSDEEP 3145728:CUrkKPAYXqEFvqdlFLlYmyGW0UKRSyLFxP2:CUdhXqwvaHlYm1W0UiXLLP
- TLSH T1842833577751D77AC05CAC3F34327579D313CE0A089824AAA86ABD08057B768263FBF9
- MD5 SHA1 SHA512 SSDEEP TLSH
-
Command and Scripting Interpreter: PowerShell
Run Powershell to get system information as a root user.
-
Modifies Windows Firewall
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Event Triggered Execution: Component Object Model Hijacking
Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.
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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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Badlisted process makes network request
Network request originating from process or tool commonly abused by malware.
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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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Contacts third-party web service commonly abused for C2
Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.
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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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Obfuscated Files or Information: Command Obfuscation
Adversaries may obfuscate content during command execution to impede detection.
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Enumerates processes with tasklist
MITRE ATT&CK Enterprise v16
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Event Triggered Execution
2Component Object Model Hijacking
1Netsh Helper DLL
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Event Triggered Execution
2Component Object Model Hijacking
1Netsh Helper DLL
1Defense Evasion
Hide Artifacts
1Ignore Process Interrupts
1Impair Defenses
1Disable or Modify System Firewall
1Modify Registry
2Obfuscated Files or Information
1Command Obfuscation
1Subvert Trust Controls
1Install Root Certificate
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1Discovery
Browser Information Discovery
1Peripheral Device Discovery
2Process Discovery
1Query Registry
5System Information Discovery
6System Location Discovery
1System Language Discovery
1System Network Configuration Discovery
1Wi-Fi Discovery
1