Analysis Overview
SHA256
ad45dc2c9fc97361218341cbca268ec4fafabe0b8721bab4d35cf6b27cc2ad11
Threat Level: Known bad
The file ad45dc2c9fc97361218341cbca268ec4fafabe0b8721bab4d35cf6b27cc2ad11 was found to be: Known bad.
Malicious Activity Summary
Detected Djvu ransomware
Vidar
Djvu Ransomware
Executes dropped EXE
Downloads MZ/PE file
Checks computer location settings
Modifies file permissions
Adds Run key to start application
Looks up external IP address via web service
Suspicious use of SetThreadContext
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Creates scheduled task(s)
Modifies system certificate store
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-12-01 18:51
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2022-12-01 18:51
Reported
2022-12-01 18:55
Platform
win10v2004-20221111-en
Max time kernel
189s
Max time network
228s
Command Line
Signatures
Detected Djvu ransomware
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
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Djvu Ransomware
Vidar
Downloads MZ/PE file
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\bf18b1dc-6323-4c55-8ed9-f7b789a68ab0\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\bf18b1dc-6323-4c55-8ed9-f7b789a68ab0\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\bf18b1dc-6323-4c55-8ed9-f7b789a68ab0\build3.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\ad45dc2c9fc97361218341cbca268ec4fafabe0b8721bab4d35cf6b27cc2ad11.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\ad45dc2c9fc97361218341cbca268ec4fafabe0b8721bab4d35cf6b27cc2ad11.exe | N/A |
Modifies file permissions
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\icacls.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\a090649e-96d4-4ab0-bd60-e5acb88c286a\\ad45dc2c9fc97361218341cbca268ec4fafabe0b8721bab4d35cf6b27cc2ad11.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\ad45dc2c9fc97361218341cbca268ec4fafabe0b8721bab4d35cf6b27cc2ad11.exe | N/A |
Looks up external IP address via web service
| Description | Indicator | Process | Target |
| N/A | api.2ip.ua | N/A | N/A |
| N/A | api.2ip.ua | N/A | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 5032 set thread context of 3796 | N/A | C:\Users\Admin\AppData\Local\Temp\ad45dc2c9fc97361218341cbca268ec4fafabe0b8721bab4d35cf6b27cc2ad11.exe | C:\Users\Admin\AppData\Local\Temp\ad45dc2c9fc97361218341cbca268ec4fafabe0b8721bab4d35cf6b27cc2ad11.exe |
| PID 4784 set thread context of 4644 | N/A | C:\Users\Admin\AppData\Local\Temp\ad45dc2c9fc97361218341cbca268ec4fafabe0b8721bab4d35cf6b27cc2ad11.exe | C:\Users\Admin\AppData\Local\Temp\ad45dc2c9fc97361218341cbca268ec4fafabe0b8721bab4d35cf6b27cc2ad11.exe |
| PID 4396 set thread context of 2492 | N/A | C:\Users\Admin\AppData\Local\bf18b1dc-6323-4c55-8ed9-f7b789a68ab0\build2.exe | C:\Users\Admin\AppData\Local\bf18b1dc-6323-4c55-8ed9-f7b789a68ab0\build2.exe |
Enumerates physical storage devices
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
Modifies system certificate store
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349 | C:\Users\Admin\AppData\Local\Temp\ad45dc2c9fc97361218341cbca268ec4fafabe0b8721bab4d35cf6b27cc2ad11.exe | N/A |
| Set value (data) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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 | C:\Users\Admin\AppData\Local\Temp\ad45dc2c9fc97361218341cbca268ec4fafabe0b8721bab4d35cf6b27cc2ad11.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\ad45dc2c9fc97361218341cbca268ec4fafabe0b8721bab4d35cf6b27cc2ad11.exe
"C:\Users\Admin\AppData\Local\Temp\ad45dc2c9fc97361218341cbca268ec4fafabe0b8721bab4d35cf6b27cc2ad11.exe"
C:\Users\Admin\AppData\Local\Temp\ad45dc2c9fc97361218341cbca268ec4fafabe0b8721bab4d35cf6b27cc2ad11.exe
"C:\Users\Admin\AppData\Local\Temp\ad45dc2c9fc97361218341cbca268ec4fafabe0b8721bab4d35cf6b27cc2ad11.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\a090649e-96d4-4ab0-bd60-e5acb88c286a" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\ad45dc2c9fc97361218341cbca268ec4fafabe0b8721bab4d35cf6b27cc2ad11.exe
"C:\Users\Admin\AppData\Local\Temp\ad45dc2c9fc97361218341cbca268ec4fafabe0b8721bab4d35cf6b27cc2ad11.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\ad45dc2c9fc97361218341cbca268ec4fafabe0b8721bab4d35cf6b27cc2ad11.exe
"C:\Users\Admin\AppData\Local\Temp\ad45dc2c9fc97361218341cbca268ec4fafabe0b8721bab4d35cf6b27cc2ad11.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\bf18b1dc-6323-4c55-8ed9-f7b789a68ab0\build2.exe
"C:\Users\Admin\AppData\Local\bf18b1dc-6323-4c55-8ed9-f7b789a68ab0\build2.exe"
C:\Users\Admin\AppData\Local\bf18b1dc-6323-4c55-8ed9-f7b789a68ab0\build2.exe
"C:\Users\Admin\AppData\Local\bf18b1dc-6323-4c55-8ed9-f7b789a68ab0\build2.exe"
C:\Users\Admin\AppData\Local\bf18b1dc-6323-4c55-8ed9-f7b789a68ab0\build3.exe
"C:\Users\Admin\AppData\Local\bf18b1dc-6323-4c55-8ed9-f7b789a68ab0\build3.exe"
C:\Windows\SysWOW64\schtasks.exe
/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
C:\Windows\SysWOW64\schtasks.exe
/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
Network
| Country | Destination | Domain | Proto |
| N/A | 93.184.220.29:80 | tcp | |
| N/A | 8.248.99.254:80 | tcp | |
| N/A | 104.208.16.90:443 | tcp | |
| N/A | 8.248.99.254:80 | tcp | |
| N/A | 8.248.99.254:80 | tcp | |
| N/A | 104.80.225.205:443 | tcp | |
| N/A | 8.8.8.8:53 | api.2ip.ua | udp |
| N/A | 162.0.217.254:443 | api.2ip.ua | tcp |
| N/A | 8.8.8.8:53 | 164.2.77.40.in-addr.arpa | udp |
| N/A | 8.8.8.8:53 | 9.9.0.0.0.0.0.0.0.0.0.0.0.0.0.0.3.0.0.0.3.0.4.0.0.3.0.1.3.0.6.2.ip6.arpa | udp |
| N/A | 162.0.217.254:443 | api.2ip.ua | tcp |
| N/A | 8.247.211.254:80 | tcp | |
| N/A | 8.8.8.8:53 | crl.comodoca.com | udp |
| N/A | 172.64.155.188:80 | crl.comodoca.com | tcp |
| N/A | 8.8.8.8:53 | uaery.top | udp |
| N/A | 8.8.8.8:53 | fresherlights.com | udp |
| N/A | 186.182.55.44:80 | uaery.top | tcp |
| N/A | 200.46.66.71:80 | fresherlights.com | tcp |
| N/A | 200.46.66.71:80 | fresherlights.com | tcp |
| N/A | 8.8.8.8:53 | t.me | udp |
| N/A | 149.154.167.99:443 | t.me | tcp |
| N/A | 116.203.0.170:80 | 116.203.0.170 | tcp |
Files
memory/3796-132-0x0000000000000000-mapping.dmp
memory/3796-133-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5032-135-0x000000000074B000-0x00000000007DC000-memory.dmp
memory/3796-134-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5032-136-0x0000000002190000-0x00000000022AB000-memory.dmp
memory/3796-137-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3796-138-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3252-139-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\a090649e-96d4-4ab0-bd60-e5acb88c286a\ad45dc2c9fc97361218341cbca268ec4fafabe0b8721bab4d35cf6b27cc2ad11.exe
| MD5 | ace36f6407402a489fcf53a60ed8db49 |
| SHA1 | aa9a51c224a61e8d8169eebfe3fefac4bba17665 |
| SHA256 | ad45dc2c9fc97361218341cbca268ec4fafabe0b8721bab4d35cf6b27cc2ad11 |
| SHA512 | a17ee5e301f3403ca06480c90f8149a1ee78cede4b7e4cc51db7eb7ca89105471992b30cd60f3c9612b9c78a7a2c6efb9ecbe20b52179309b58440b3f809bff2 |
memory/4784-141-0x0000000000000000-mapping.dmp
memory/3796-142-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4644-143-0x0000000000000000-mapping.dmp
memory/4784-145-0x00000000021B4000-0x0000000002245000-memory.dmp
memory/4644-146-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4644-147-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4644-149-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4396-150-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\bf18b1dc-6323-4c55-8ed9-f7b789a68ab0\build2.exe
| MD5 | b9212ded69fae1fa1fb5d6db46a9fb76 |
| SHA1 | 58face4245646b1cd379ee49f03a701eab1642be |
| SHA256 | 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f |
| SHA512 | 09cab8ccedb9e53d6d2725e8b9dbbe8fa9552607a58d89876b6539a6612b2e7ac0440ef281971bec9191510915fa6264048510add493e6a862b0d3b4f006e342 |
C:\Users\Admin\AppData\Local\bf18b1dc-6323-4c55-8ed9-f7b789a68ab0\build2.exe
| MD5 | b9212ded69fae1fa1fb5d6db46a9fb76 |
| SHA1 | 58face4245646b1cd379ee49f03a701eab1642be |
| SHA256 | 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f |
| SHA512 | 09cab8ccedb9e53d6d2725e8b9dbbe8fa9552607a58d89876b6539a6612b2e7ac0440ef281971bec9191510915fa6264048510add493e6a862b0d3b4f006e342 |
memory/2492-153-0x0000000000000000-mapping.dmp
memory/2492-154-0x0000000000400000-0x000000000045F000-memory.dmp
C:\Users\Admin\AppData\Local\bf18b1dc-6323-4c55-8ed9-f7b789a68ab0\build2.exe
| MD5 | b9212ded69fae1fa1fb5d6db46a9fb76 |
| SHA1 | 58face4245646b1cd379ee49f03a701eab1642be |
| SHA256 | 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f |
| SHA512 | 09cab8ccedb9e53d6d2725e8b9dbbe8fa9552607a58d89876b6539a6612b2e7ac0440ef281971bec9191510915fa6264048510add493e6a862b0d3b4f006e342 |
memory/4396-156-0x000000000078E000-0x00000000007BA000-memory.dmp
memory/2492-157-0x0000000000400000-0x000000000045F000-memory.dmp
memory/4396-158-0x00000000006D0000-0x000000000071B000-memory.dmp
memory/2492-159-0x0000000000400000-0x000000000045F000-memory.dmp
memory/2492-160-0x0000000000400000-0x000000000045F000-memory.dmp
memory/1932-161-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\bf18b1dc-6323-4c55-8ed9-f7b789a68ab0\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\bf18b1dc-6323-4c55-8ed9-f7b789a68ab0\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/4636-164-0x0000000000000000-mapping.dmp
memory/2492-165-0x0000000061E00000-0x0000000061EF3000-memory.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/1072-185-0x0000000000000000-mapping.dmp