Analysis Overview
SHA256
6b29cfbf1c17a42cddb1ba0c59e12415c6f92e4d7a6801843d962dd3450da691
Threat Level: Known bad
The file 6b29cfbf1c17a42cddb1ba0c59e12415c6f92e4d7a6801843d962dd3450da691 was found to be: Known bad.
Malicious Activity Summary
Vidar
Detected Djvu ransomware
Djvu Ransomware
Downloads MZ/PE file
Loads dropped DLL
Executes dropped EXE
Modifies file permissions
Reads user/profile data of web browsers
Accesses cryptocurrency files/wallets, possible credential harvesting
Looks up external IP address via web service
Checks installed software on the system
Accesses 2FA software files, possible credential harvesting
Adds Run key to start application
Suspicious use of SetThreadContext
Enumerates physical storage devices
Checks processor information in registry
Suspicious use of WriteProcessMemory
Delays execution with timeout.exe
Suspicious behavior: EnumeratesProcesses
Creates scheduled task(s)
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2023-03-31 08:19
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2023-03-31 08:19
Reported
2023-03-31 08:22
Platform
win10-20230220-en
Max time kernel
146s
Max time network
127s
Command Line
Signatures
Detected Djvu ransomware
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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\4f4ac943-c0ed-4bd4-9784-35cbc9ed6a0e\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\4f4ac943-c0ed-4bd4-9784-35cbc9ed6a0e\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\4f4ac943-c0ed-4bd4-9784-35cbc9ed6a0e\build3.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\4f4ac943-c0ed-4bd4-9784-35cbc9ed6a0e\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\4f4ac943-c0ed-4bd4-9784-35cbc9ed6a0e\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-1-5-21-1311743041-1167936498-546579926-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\a5fd23ca-886b-4271-80e6-5c02441d1fc5\\6b29cfbf1c17a42cddb1ba0c59e12415c6f92e4d7a6801843d962dd3450da691.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\6b29cfbf1c17a42cddb1ba0c59e12415c6f92e4d7a6801843d962dd3450da691.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 2564 | N/A | C:\Users\Admin\AppData\Local\Temp\6b29cfbf1c17a42cddb1ba0c59e12415c6f92e4d7a6801843d962dd3450da691.exe | C:\Users\Admin\AppData\Local\Temp\6b29cfbf1c17a42cddb1ba0c59e12415c6f92e4d7a6801843d962dd3450da691.exe |
| PID 388 set thread context of 4660 | N/A | C:\Users\Admin\AppData\Local\Temp\6b29cfbf1c17a42cddb1ba0c59e12415c6f92e4d7a6801843d962dd3450da691.exe | C:\Users\Admin\AppData\Local\Temp\6b29cfbf1c17a42cddb1ba0c59e12415c6f92e4d7a6801843d962dd3450da691.exe |
| PID 3928 set thread context of 4100 | N/A | C:\Users\Admin\AppData\Local\4f4ac943-c0ed-4bd4-9784-35cbc9ed6a0e\build2.exe | C:\Users\Admin\AppData\Local\4f4ac943-c0ed-4bd4-9784-35cbc9ed6a0e\build2.exe |
Enumerates physical storage devices
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Users\Admin\AppData\Local\4f4ac943-c0ed-4bd4-9784-35cbc9ed6a0e\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\4f4ac943-c0ed-4bd4-9784-35cbc9ed6a0e\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\6b29cfbf1c17a42cddb1ba0c59e12415c6f92e4d7a6801843d962dd3450da691.exe
"C:\Users\Admin\AppData\Local\Temp\6b29cfbf1c17a42cddb1ba0c59e12415c6f92e4d7a6801843d962dd3450da691.exe"
C:\Users\Admin\AppData\Local\Temp\6b29cfbf1c17a42cddb1ba0c59e12415c6f92e4d7a6801843d962dd3450da691.exe
"C:\Users\Admin\AppData\Local\Temp\6b29cfbf1c17a42cddb1ba0c59e12415c6f92e4d7a6801843d962dd3450da691.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\a5fd23ca-886b-4271-80e6-5c02441d1fc5" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\6b29cfbf1c17a42cddb1ba0c59e12415c6f92e4d7a6801843d962dd3450da691.exe
"C:\Users\Admin\AppData\Local\Temp\6b29cfbf1c17a42cddb1ba0c59e12415c6f92e4d7a6801843d962dd3450da691.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\6b29cfbf1c17a42cddb1ba0c59e12415c6f92e4d7a6801843d962dd3450da691.exe
"C:\Users\Admin\AppData\Local\Temp\6b29cfbf1c17a42cddb1ba0c59e12415c6f92e4d7a6801843d962dd3450da691.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\4f4ac943-c0ed-4bd4-9784-35cbc9ed6a0e\build2.exe
"C:\Users\Admin\AppData\Local\4f4ac943-c0ed-4bd4-9784-35cbc9ed6a0e\build2.exe"
C:\Users\Admin\AppData\Local\4f4ac943-c0ed-4bd4-9784-35cbc9ed6a0e\build2.exe
"C:\Users\Admin\AppData\Local\4f4ac943-c0ed-4bd4-9784-35cbc9ed6a0e\build2.exe"
C:\Users\Admin\AppData\Local\4f4ac943-c0ed-4bd4-9784-35cbc9ed6a0e\build3.exe
"C:\Users\Admin\AppData\Local\4f4ac943-c0ed-4bd4-9784-35cbc9ed6a0e\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\4f4ac943-c0ed-4bd4-9784-35cbc9ed6a0e\build2.exe" & exit
C:\Windows\SysWOW64\timeout.exe
timeout /t 6
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | api.2ip.ua | udp |
| NL | 162.0.217.254:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | 254.217.0.162.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 254.210.247.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 68.32.18.104.in-addr.arpa | udp |
| NL | 162.0.217.254:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | uaery.top | udp |
| US | 8.8.8.8:53 | zexeq.com | udp |
| AL | 95.107.163.44:80 | uaery.top | tcp |
| KR | 211.40.39.251:80 | zexeq.com | tcp |
| US | 8.8.8.8:53 | 44.163.107.95.in-addr.arpa | udp |
| KR | 211.40.39.251:80 | zexeq.com | tcp |
| US | 8.8.8.8:53 | 251.39.40.211.in-addr.arpa | udp |
| US | 8.8.8.8:53 | t.me | udp |
| NL | 149.154.167.99:443 | t.me | tcp |
| DE | 78.47.168.170:80 | 78.47.168.170 | tcp |
| US | 8.8.8.8:53 | 99.167.154.149.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 22.249.124.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 170.168.47.78.in-addr.arpa | udp |
| US | 52.182.143.208:443 | tcp | |
| NL | 84.53.175.11:80 | tcp | |
| US | 8.8.8.8:53 | 86.8.109.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 254.177.238.8.in-addr.arpa | udp |
| US | 93.184.220.29:80 | tcp |
Files
memory/2496-122-0x00000000023D0000-0x00000000024EB000-memory.dmp
memory/2564-124-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2564-123-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2564-125-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2564-133-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\a5fd23ca-886b-4271-80e6-5c02441d1fc5\6b29cfbf1c17a42cddb1ba0c59e12415c6f92e4d7a6801843d962dd3450da691.exe
| MD5 | 000cdd6ad80463f0968baee750081753 |
| SHA1 | 7226a1d8fa00db3020575dbdc93d9b51330b055d |
| SHA256 | 6b29cfbf1c17a42cddb1ba0c59e12415c6f92e4d7a6801843d962dd3450da691 |
| SHA512 | 16516e18395e4e70642c3df5c6c7917fef0d38b965f0698ef9b4cc5d1609c654e2c4e549d2e6adc24672007187318b03fed4023b03dff17938f358a621937304 |
memory/2564-137-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4660-141-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4660-142-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | ee7ad9d8f28e0558a94e667206e8a271 |
| SHA1 | b49a079526da92d55f2d1bc66659836c0f90a086 |
| SHA256 | 9eeeef2cbd8192c6586ffa64114ad0c3e8e5ab3a73817e1044895517c6eba712 |
| SHA512 | 0c1596e7b8e54e0cce8139a339c4c34f5f9391ce0b7051673abe7a43f174f292e0d3267b1ce1186247535941b416962b6fe63cb03855ddea254cf09fddad3223 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | b735e06079b8d003591a4c89d8196865 |
| SHA1 | 5bb8893d92c4ea1c3f07db25adb08e796311e9ca |
| SHA256 | a461facbcb1fdb5674e6b7f3c7599d903a4dd29c913750de95988b9f6b5e21f1 |
| SHA512 | 10600ebb4a2795f5e82668bf5f9c0ecd81641ef8e253c34305465d0ca70000d672889a3b0a7f4f353dfbe767a126a4b8c9a5a91a49d66c85715a6999654e16ed |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | 6a3b8331e801f083b403b0857ed8d574 |
| SHA1 | 48d275731f1dbd0630d1ca55a1b05f149a011d1f |
| SHA256 | 98651a2da4a4613bc2a03c4128926fe6b05f1af8a7a21e1fedec75db013706a0 |
| SHA512 | 7527b8857707c8822e4b7f5049ddc9b4c49933e68535690746d84b7f0187a10f36e874719bdb1bf3ba8b035568a7cbafd687b80c4621dc35552d73f7e497071d |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | 9c1b17303571baf36248285c09b2b7c1 |
| SHA1 | 235dc1d0b7cd979ed93a7063ca7b134d37214af1 |
| SHA256 | 316622e854476146020a7299d78fa55ab412a8a2ea890aca63a91dac260ede81 |
| SHA512 | e54e19d946c173c353cd6350c649f6e59ae9eadc932cd27f3834def6264ab79a7bda172533822e3acbc37311fec182ee9ada7232b56cad2a3b4712e752c7c9c2 |
memory/4660-147-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4660-149-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4660-148-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\4f4ac943-c0ed-4bd4-9784-35cbc9ed6a0e\build2.exe
| MD5 | aa18968e6cfbdc382ada6a3ed2852085 |
| SHA1 | 4a41fa1a182916d5790aa2071106b3441d64468d |
| SHA256 | c165c8db38ef8dd8c33d103b5ee78e9ddafd8081ff0c7c035fa5251f970e6cfb |
| SHA512 | 8ffdacca2b003438fd4874e7c88beedb6ad8cf9cd5b36fda5907751e06a85a829e7d9ce7335fb59590462f78054722bccba511b21db838368c661d993000a845 |
C:\Users\Admin\AppData\Local\4f4ac943-c0ed-4bd4-9784-35cbc9ed6a0e\build2.exe
| MD5 | aa18968e6cfbdc382ada6a3ed2852085 |
| SHA1 | 4a41fa1a182916d5790aa2071106b3441d64468d |
| SHA256 | c165c8db38ef8dd8c33d103b5ee78e9ddafd8081ff0c7c035fa5251f970e6cfb |
| SHA512 | 8ffdacca2b003438fd4874e7c88beedb6ad8cf9cd5b36fda5907751e06a85a829e7d9ce7335fb59590462f78054722bccba511b21db838368c661d993000a845 |
memory/4660-160-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4660-162-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4660-163-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4100-165-0x0000000000400000-0x000000000046C000-memory.dmp
memory/3928-168-0x0000000004690000-0x00000000046E7000-memory.dmp
memory/4100-167-0x0000000000400000-0x000000000046C000-memory.dmp
C:\Users\Admin\AppData\Local\4f4ac943-c0ed-4bd4-9784-35cbc9ed6a0e\build2.exe
| MD5 | aa18968e6cfbdc382ada6a3ed2852085 |
| SHA1 | 4a41fa1a182916d5790aa2071106b3441d64468d |
| SHA256 | c165c8db38ef8dd8c33d103b5ee78e9ddafd8081ff0c7c035fa5251f970e6cfb |
| SHA512 | 8ffdacca2b003438fd4874e7c88beedb6ad8cf9cd5b36fda5907751e06a85a829e7d9ce7335fb59590462f78054722bccba511b21db838368c661d993000a845 |
memory/4100-169-0x0000000000400000-0x000000000046C000-memory.dmp
memory/4100-170-0x0000000000400000-0x000000000046C000-memory.dmp
memory/4660-176-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\4f4ac943-c0ed-4bd4-9784-35cbc9ed6a0e\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\4f4ac943-c0ed-4bd4-9784-35cbc9ed6a0e\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/4660-180-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4100-191-0x0000000061E00000-0x0000000061EF3000-memory.dmp
\ProgramData\nss3.dll
| MD5 | 1cc453cdf74f31e4d913ff9c10acdde2 |
| SHA1 | 6e85eae544d6e965f15fa5c39700fa7202f3aafe |
| SHA256 | ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5 |
| SHA512 | dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571 |
\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/4100-235-0x0000000000400000-0x000000000046C000-memory.dmp
memory/4100-249-0x0000000000400000-0x000000000046C000-memory.dmp
memory/4100-251-0x0000000000400000-0x000000000046C000-memory.dmp
memory/4100-252-0x0000000000400000-0x000000000046C000-memory.dmp