Analysis Overview
SHA256
749e50f4f99b3ff91c4ae7055b9d87030dcec31892df92b0a6d96d7d151641d6
Threat Level: Known bad
The file 749e50f4f99b3ff91c4ae7055b9d87030dcec31892df92b0a6d96d7d151641d6 was found to be: Known bad.
Malicious Activity Summary
Vidar
Detected Djvu ransomware
Djvu Ransomware
Executes dropped EXE
Downloads MZ/PE file
Loads dropped DLL
Reads user/profile data of web browsers
Modifies file permissions
Checks computer location settings
Adds Run key to start application
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks installed software on the system
Looks up external IP address via web service
Accesses 2FA software files, possible credential harvesting
Suspicious use of SetThreadContext
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Checks processor information in registry
Delays execution with timeout.exe
Creates scheduled task(s)
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-11-29 23:56
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2022-11-29 23:56
Reported
2022-11-29 23:59
Platform
win10v2004-20220901-en
Max time kernel
90s
Max time network
139s
Command Line
Signatures
Detected Djvu ransomware
| Description | Indicator | Process | Target |
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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\c1ef469c-40de-4656-9a68-f574ced6e2b0\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\c1ef469c-40de-4656-9a68-f574ced6e2b0\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\c1ef469c-40de-4656-9a68-f574ced6e2b0\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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\749e50f4f99b3ff91c4ae7055b9d87030dcec31892df92b0a6d96d7d151641d6.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\749e50f4f99b3ff91c4ae7055b9d87030dcec31892df92b0a6d96d7d151641d6.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\c1ef469c-40de-4656-9a68-f574ced6e2b0\build2.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\c1ef469c-40de-4656-9a68-f574ced6e2b0\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\c1ef469c-40de-4656-9a68-f574ced6e2b0\build2.exe | N/A |
Modifies file permissions
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\icacls.exe | N/A |
Reads user/profile data of web browsers
Accesses 2FA software files, possible credential harvesting
Accesses cryptocurrency files/wallets, possible credential harvesting
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\3f4954b6-44ee-4194-a9f8-0c84eb16dd52\\749e50f4f99b3ff91c4ae7055b9d87030dcec31892df92b0a6d96d7d151641d6.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\749e50f4f99b3ff91c4ae7055b9d87030dcec31892df92b0a6d96d7d151641d6.exe | N/A |
Checks installed software on the system
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 |
| N/A | api.2ip.ua | N/A | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2496 set thread context of 4636 | N/A | C:\Users\Admin\AppData\Local\Temp\749e50f4f99b3ff91c4ae7055b9d87030dcec31892df92b0a6d96d7d151641d6.exe | C:\Users\Admin\AppData\Local\Temp\749e50f4f99b3ff91c4ae7055b9d87030dcec31892df92b0a6d96d7d151641d6.exe |
| PID 4068 set thread context of 1420 | N/A | C:\Users\Admin\AppData\Local\Temp\749e50f4f99b3ff91c4ae7055b9d87030dcec31892df92b0a6d96d7d151641d6.exe | C:\Users\Admin\AppData\Local\Temp\749e50f4f99b3ff91c4ae7055b9d87030dcec31892df92b0a6d96d7d151641d6.exe |
| PID 444 set thread context of 4444 | N/A | C:\Users\Admin\AppData\Local\c1ef469c-40de-4656-9a68-f574ced6e2b0\build2.exe | C:\Users\Admin\AppData\Local\c1ef469c-40de-4656-9a68-f574ced6e2b0\build2.exe |
Enumerates physical storage devices
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\c1ef469c-40de-4656-9a68-f574ced6e2b0\build2.exe | N/A |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Users\Admin\AppData\Local\c1ef469c-40de-4656-9a68-f574ced6e2b0\build2.exe | N/A |
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 |
Delays execution with timeout.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\timeout.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\749e50f4f99b3ff91c4ae7055b9d87030dcec31892df92b0a6d96d7d151641d6.exe
"C:\Users\Admin\AppData\Local\Temp\749e50f4f99b3ff91c4ae7055b9d87030dcec31892df92b0a6d96d7d151641d6.exe"
C:\Users\Admin\AppData\Local\Temp\749e50f4f99b3ff91c4ae7055b9d87030dcec31892df92b0a6d96d7d151641d6.exe
"C:\Users\Admin\AppData\Local\Temp\749e50f4f99b3ff91c4ae7055b9d87030dcec31892df92b0a6d96d7d151641d6.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\3f4954b6-44ee-4194-a9f8-0c84eb16dd52" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\749e50f4f99b3ff91c4ae7055b9d87030dcec31892df92b0a6d96d7d151641d6.exe
"C:\Users\Admin\AppData\Local\Temp\749e50f4f99b3ff91c4ae7055b9d87030dcec31892df92b0a6d96d7d151641d6.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\749e50f4f99b3ff91c4ae7055b9d87030dcec31892df92b0a6d96d7d151641d6.exe
"C:\Users\Admin\AppData\Local\Temp\749e50f4f99b3ff91c4ae7055b9d87030dcec31892df92b0a6d96d7d151641d6.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\c1ef469c-40de-4656-9a68-f574ced6e2b0\build2.exe
"C:\Users\Admin\AppData\Local\c1ef469c-40de-4656-9a68-f574ced6e2b0\build2.exe"
C:\Users\Admin\AppData\Local\c1ef469c-40de-4656-9a68-f574ced6e2b0\build2.exe
"C:\Users\Admin\AppData\Local\c1ef469c-40de-4656-9a68-f574ced6e2b0\build2.exe"
C:\Users\Admin\AppData\Local\c1ef469c-40de-4656-9a68-f574ced6e2b0\build3.exe
"C:\Users\Admin\AppData\Local\c1ef469c-40de-4656-9a68-f574ced6e2b0\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"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\c1ef469c-40de-4656-9a68-f574ced6e2b0\build2.exe" & exit
C:\Windows\SysWOW64\timeout.exe
timeout /t 6
Network
| Country | Destination | Domain | Proto |
| N/A | 8.8.8.8:53 | api.2ip.ua | udp |
| N/A | 162.0.217.254:443 | api.2ip.ua | tcp |
| N/A | 162.0.217.254:443 | api.2ip.ua | tcp |
| N/A | 8.8.8.8:53 | uaery.top | udp |
| N/A | 8.8.8.8:53 | fresherlights.com | udp |
| N/A | 195.158.3.162:80 | uaery.top | tcp |
| N/A | 181.94.48.228:80 | fresherlights.com | tcp |
| N/A | 181.94.48.228:80 | 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 | 88.198.94.71:80 | 88.198.94.71 | tcp |
| N/A | 13.78.111.198:443 | tcp | |
| N/A | 8.238.110.126:80 | tcp | |
| N/A | 88.221.25.155:80 | tcp | |
| N/A | 88.221.25.155:80 | tcp | |
| N/A | 8.238.110.126:80 | tcp | |
| N/A | 8.247.211.254:80 | tcp | |
| N/A | 204.79.197.203:80 | tcp |
Files
memory/4636-132-0x0000000000000000-mapping.dmp
memory/4636-133-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2496-135-0x000000000079A000-0x000000000082C000-memory.dmp
memory/4636-134-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2496-136-0x00000000023D0000-0x00000000024EB000-memory.dmp
memory/4636-137-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4636-138-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4940-139-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\3f4954b6-44ee-4194-a9f8-0c84eb16dd52\749e50f4f99b3ff91c4ae7055b9d87030dcec31892df92b0a6d96d7d151641d6.exe
| MD5 | bab03c2ce9374981269596f8577cc553 |
| SHA1 | 30128f07491475d34ee8eead5dafbb73ef3fbb33 |
| SHA256 | 749e50f4f99b3ff91c4ae7055b9d87030dcec31892df92b0a6d96d7d151641d6 |
| SHA512 | f9926e020e7ee67b942253c95c4799866d73365b52d1c0c07c8c9af811880159c79a3a2c910a9f1c3479e637dadf404426643357771f6eedd9f825b51840ae17 |
memory/4068-141-0x0000000000000000-mapping.dmp
memory/4636-142-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1420-143-0x0000000000000000-mapping.dmp
memory/4068-146-0x000000000218E000-0x0000000002220000-memory.dmp
memory/1420-145-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1420-147-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | 916c512d221c683beeea9d5cb311b0b0 |
| SHA1 | bf0db4b1c4566275b629efb095b6ff8857b5748e |
| SHA256 | 64a36c1637d0a111152002a2c0385b0df9dd81b616b3f2073fbbe3f2975aa4d8 |
| SHA512 | af32cffea722438e9b17b08062dc2e209edc5417418964ead0b392bd502e1a647a8456b2ee2ea59faf69f93d0c6ea6f15949b6c30924db7da65b91cb18e8dc6c |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | dc505adc6c735e89b04f643a46624c8b |
| SHA1 | ecc04a991c9d3b049e0492dc59de93e8b684efb0 |
| SHA256 | 504195cd7300135426e312ac45a7d3e17fc383f894377cce689104bc03a50a78 |
| SHA512 | a538d7b01ab408b38de1ee50859b029d312e6a3bc5410521408c8c3bc0ba57912f46b5b273b23af3094434a8162f0e55c7a618f53bf61eacfa8749ed32ffbf76 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | 76e7d5bf61b2e80d159f88aa9798ce91 |
| SHA1 | 32a46de50c9c02b068e39cf49b78c7e2d5ace20d |
| SHA256 | 280fd6ae3ad21323199759814c4dd82329eb8f9847ed1fa2be145e83b4c88bf3 |
| SHA512 | 5efd8c64ac40ae006d2ce4509eb9e5f1448fb1156e914d303e8bc4dcfe1d94c57c7eae216b362877e7b644876656cc9e5c4cebfc905bab3f8b09cb1a051d69c4 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | fa7be45f45520577f029ec90186bc215 |
| SHA1 | 13a303d7e7ddeaada97123eafa3a89d55fd6ced1 |
| SHA256 | 7f3fd2750f0036ab2f838fa554a1fbe599a36510e848abb2e3468a27c45f0d33 |
| SHA512 | 39c90dac2207015c7317e0f49cfad8ec8667b08838161a7a710b0ae31777eccf3e4d1146cbdb2a8133d8a7e8fbd67e25e52bad17585c0c4df71bce6e343ee515 |
memory/1420-152-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\c1ef469c-40de-4656-9a68-f574ced6e2b0\build2.exe
| MD5 | b9212ded69fae1fa1fb5d6db46a9fb76 |
| SHA1 | 58face4245646b1cd379ee49f03a701eab1642be |
| SHA256 | 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f |
| SHA512 | 09cab8ccedb9e53d6d2725e8b9dbbe8fa9552607a58d89876b6539a6612b2e7ac0440ef281971bec9191510915fa6264048510add493e6a862b0d3b4f006e342 |
memory/444-153-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\c1ef469c-40de-4656-9a68-f574ced6e2b0\build2.exe
| MD5 | b9212ded69fae1fa1fb5d6db46a9fb76 |
| SHA1 | 58face4245646b1cd379ee49f03a701eab1642be |
| SHA256 | 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f |
| SHA512 | 09cab8ccedb9e53d6d2725e8b9dbbe8fa9552607a58d89876b6539a6612b2e7ac0440ef281971bec9191510915fa6264048510add493e6a862b0d3b4f006e342 |
memory/4444-156-0x0000000000000000-mapping.dmp
memory/4444-157-0x0000000000400000-0x000000000045F000-memory.dmp
memory/4444-159-0x0000000000400000-0x000000000045F000-memory.dmp
C:\Users\Admin\AppData\Local\c1ef469c-40de-4656-9a68-f574ced6e2b0\build2.exe
| MD5 | b9212ded69fae1fa1fb5d6db46a9fb76 |
| SHA1 | 58face4245646b1cd379ee49f03a701eab1642be |
| SHA256 | 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f |
| SHA512 | 09cab8ccedb9e53d6d2725e8b9dbbe8fa9552607a58d89876b6539a6612b2e7ac0440ef281971bec9191510915fa6264048510add493e6a862b0d3b4f006e342 |
memory/4444-160-0x0000000000400000-0x000000000045F000-memory.dmp
memory/444-162-0x00000000005F0000-0x000000000063B000-memory.dmp
memory/444-161-0x00000000004DD000-0x0000000000509000-memory.dmp
memory/4444-163-0x0000000000400000-0x000000000045F000-memory.dmp
memory/3900-164-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\c1ef469c-40de-4656-9a68-f574ced6e2b0\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\c1ef469c-40de-4656-9a68-f574ced6e2b0\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/3756-167-0x0000000000000000-mapping.dmp
memory/4444-168-0x0000000061E00000-0x0000000061EF3000-memory.dmp
C:\ProgramData\nss3.dll
| MD5 | 1cc453cdf74f31e4d913ff9c10acdde2 |
| SHA1 | 6e85eae544d6e965f15fa5c39700fa7202f3aafe |
| SHA256 | ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5 |
| SHA512 | dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571 |
C:\ProgramData\mozglue.dll
| MD5 | c8fd9be83bc728cc04beffafc2907fe9 |
| SHA1 | 95ab9f701e0024cedfbd312bcfe4e726744c4f2e |
| SHA256 | ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a |
| SHA512 | fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040 |
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/628-190-0x0000000000000000-mapping.dmp
memory/5024-191-0x0000000000000000-mapping.dmp
memory/4444-192-0x0000000000400000-0x000000000045F000-memory.dmp
memory/1384-193-0x0000000000000000-mapping.dmp
memory/1420-194-0x0000000000400000-0x0000000000537000-memory.dmp