Analysis Overview
SHA256
543eda6720be01859cba156967c7b777ea0de68524e37dbbfe9b405ecd5df590
Threat Level: Known bad
The file 543eda6720be01859cba156967c7b777ea0de68524e37dbbfe9b405ecd5df590 was found to be: Known bad.
Malicious Activity Summary
Djvu Ransomware
Vidar
Detected Djvu ransomware
Downloads MZ/PE file
Modifies file permissions
Executes dropped EXE
Loads dropped DLL
Reads user/profile data of web browsers
Adds Run key to start application
Looks up external IP address via web service
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks installed software on the system
Accesses 2FA software files, possible credential harvesting
Suspicious use of SetThreadContext
Enumerates physical storage devices
Creates scheduled task(s)
Delays execution with timeout.exe
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Checks processor information in registry
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2023-03-28 04:55
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2023-03-28 04:55
Reported
2023-03-28 04:57
Platform
win10-20230220-en
Max time kernel
144s
Max time network
142s
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\daf37fd1-3676-41fe-a870-da4e7e1e0bce\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\daf37fd1-3676-41fe-a870-da4e7e1e0bce\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\daf37fd1-3676-41fe-a870-da4e7e1e0bce\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\daf37fd1-3676-41fe-a870-da4e7e1e0bce\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\daf37fd1-3676-41fe-a870-da4e7e1e0bce\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-1-5-21-3853465373-1718857667-1861325682-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\1c71e41a-00ca-4740-8138-6a989b5fe98c\\543eda6720be01859cba156967c7b777ea0de68524e37dbbfe9b405ecd5df590.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\543eda6720be01859cba156967c7b777ea0de68524e37dbbfe9b405ecd5df590.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 4668 set thread context of 4880 | N/A | C:\Users\Admin\AppData\Local\Temp\543eda6720be01859cba156967c7b777ea0de68524e37dbbfe9b405ecd5df590.exe | C:\Users\Admin\AppData\Local\Temp\543eda6720be01859cba156967c7b777ea0de68524e37dbbfe9b405ecd5df590.exe |
| PID 3876 set thread context of 944 | N/A | C:\Users\Admin\AppData\Local\Temp\543eda6720be01859cba156967c7b777ea0de68524e37dbbfe9b405ecd5df590.exe | C:\Users\Admin\AppData\Local\Temp\543eda6720be01859cba156967c7b777ea0de68524e37dbbfe9b405ecd5df590.exe |
| PID 1532 set thread context of 4456 | N/A | C:\Users\Admin\AppData\Local\daf37fd1-3676-41fe-a870-da4e7e1e0bce\build2.exe | C:\Users\Admin\AppData\Local\daf37fd1-3676-41fe-a870-da4e7e1e0bce\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\daf37fd1-3676-41fe-a870-da4e7e1e0bce\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\daf37fd1-3676-41fe-a870-da4e7e1e0bce\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\543eda6720be01859cba156967c7b777ea0de68524e37dbbfe9b405ecd5df590.exe
"C:\Users\Admin\AppData\Local\Temp\543eda6720be01859cba156967c7b777ea0de68524e37dbbfe9b405ecd5df590.exe"
C:\Users\Admin\AppData\Local\Temp\543eda6720be01859cba156967c7b777ea0de68524e37dbbfe9b405ecd5df590.exe
"C:\Users\Admin\AppData\Local\Temp\543eda6720be01859cba156967c7b777ea0de68524e37dbbfe9b405ecd5df590.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\1c71e41a-00ca-4740-8138-6a989b5fe98c" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\543eda6720be01859cba156967c7b777ea0de68524e37dbbfe9b405ecd5df590.exe
"C:\Users\Admin\AppData\Local\Temp\543eda6720be01859cba156967c7b777ea0de68524e37dbbfe9b405ecd5df590.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\543eda6720be01859cba156967c7b777ea0de68524e37dbbfe9b405ecd5df590.exe
"C:\Users\Admin\AppData\Local\Temp\543eda6720be01859cba156967c7b777ea0de68524e37dbbfe9b405ecd5df590.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\daf37fd1-3676-41fe-a870-da4e7e1e0bce\build2.exe
"C:\Users\Admin\AppData\Local\daf37fd1-3676-41fe-a870-da4e7e1e0bce\build2.exe"
C:\Users\Admin\AppData\Local\daf37fd1-3676-41fe-a870-da4e7e1e0bce\build2.exe
"C:\Users\Admin\AppData\Local\daf37fd1-3676-41fe-a870-da4e7e1e0bce\build2.exe"
C:\Users\Admin\AppData\Local\daf37fd1-3676-41fe-a870-da4e7e1e0bce\build3.exe
"C:\Users\Admin\AppData\Local\daf37fd1-3676-41fe-a870-da4e7e1e0bce\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\daf37fd1-3676-41fe-a870-da4e7e1e0bce\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 | 188.155.64.172.in-addr.arpa | udp |
| NL | 162.0.217.254:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | uaery.top | udp |
| IR | 80.210.25.252:80 | uaery.top | tcp |
| US | 8.8.8.8:53 | zexeq.com | udp |
| KW | 37.34.248.24:80 | zexeq.com | tcp |
| US | 8.8.8.8:53 | 252.25.210.80.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 24.248.34.37.in-addr.arpa | udp |
| KW | 37.34.248.24:80 | zexeq.com | tcp |
| US | 8.8.8.8:53 | t.me | udp |
| NL | 149.154.167.99:443 | t.me | tcp |
| DE | 116.203.10.236:80 | 116.203.10.236 | tcp |
| US | 8.8.8.8:53 | 99.167.154.149.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 36.249.124.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 236.10.203.116.in-addr.arpa | udp |
| US | 20.189.173.15:443 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 8.8.8.8:53 | 64.13.109.52.in-addr.arpa | udp |
Files
memory/4880-117-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4668-119-0x0000000002590000-0x00000000026AB000-memory.dmp
memory/4880-118-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4880-120-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4880-123-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\1c71e41a-00ca-4740-8138-6a989b5fe98c\543eda6720be01859cba156967c7b777ea0de68524e37dbbfe9b405ecd5df590.exe
| MD5 | 95f5fa7b06c3599d18cf580bba1ad041 |
| SHA1 | e420a046954a403db5e8ed4993f815f1cb432ed9 |
| SHA256 | 543eda6720be01859cba156967c7b777ea0de68524e37dbbfe9b405ecd5df590 |
| SHA512 | d0fa75cff951cee699f3b43bd31ad5f65abfb46f57486a82f96ff6789acb3bad775c8b535054b34820b99678b906b170c9196172031f9fc128b4056248c3c310 |
memory/4880-132-0x0000000000400000-0x0000000000537000-memory.dmp
memory/944-136-0x0000000000400000-0x0000000000537000-memory.dmp
memory/944-137-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | e5b1cc0ae5af6a8277d75cff4af2c5e8 |
| SHA1 | 4768fff3d4bbe02f89683b4a0e7b15b24b54eb9f |
| SHA256 | d950c0d748aae641d71b11cd1c519b289917c23bee1a2b6bc5c496fd8e5d4655 |
| SHA512 | 57a4737deeefac0124d73b52525993fecbbebd21a556ece87f8e79e845e07f037abb5e49f7458e8a010935c6691f18fbb913d77ecfb2ba902067788c483ec3d7 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | 72db6e9d738503a5133f4f60cb3e6a3e |
| SHA1 | 56d78a215297b9cf9abcca38f0a7be1b324bfb94 |
| SHA256 | fab8c4ed5470b63167f1d8101b75412c1ba69545ba65cb33fb7703969c3d9476 |
| SHA512 | 13435c81d116a8ccb5c3768be925cd4f62443f0c657ed0a8bbbbf967fc65cb3a6b22cac93b0612913e5a538db519c43c8e8dfd875e2ee3e7100de0c1effe8116 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | 3adac03b181d7980568dda0da0efc9de |
| SHA1 | a283c4c9bd26a65b8240d21708e57f5946778341 |
| SHA256 | 24c4973ced938b77d9670ac79eb76cd52411b17ab59ec78ba14c1b433f342933 |
| SHA512 | 6fbd2a32fc18606628ea56311764cd879a1196405dddd4d269ad6163b2ffdcf916786f1c0328f27ec089be5cb9b4ecb3542363f4dfb3df1c1b91a0e038b67241 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | 6b67d65cce19781be866927ba260c991 |
| SHA1 | f882b8b2220c084fd06bb2c2cdbb4db87ffb15a4 |
| SHA256 | f6523ec1f5a713c01b0bfc7675030124ec3a192b364e8a173b3bb3f8b69e8bff |
| SHA512 | d1450d8706212ce4849c6c27e04a23f7e4f3e4f8f8a67c385ce7dea290297f14c4db87b940c1fb9be0b7d71e139265ed936e06a63352e390d92d621470ea6c06 |
memory/944-142-0x0000000000400000-0x0000000000537000-memory.dmp
memory/944-143-0x0000000000400000-0x0000000000537000-memory.dmp
memory/944-144-0x0000000000400000-0x0000000000537000-memory.dmp
memory/944-148-0x0000000000400000-0x0000000000537000-memory.dmp
memory/944-151-0x0000000000400000-0x0000000000537000-memory.dmp
memory/944-150-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\daf37fd1-3676-41fe-a870-da4e7e1e0bce\build2.exe
| MD5 | 6b343cd7dea3ae28d0819bc55a2f86fe |
| SHA1 | cedd49849a5dd678d0a55da607e9b28a9680073c |
| SHA256 | 4240b655ed2af5ae8873b49e2e2d204383b2fd675c21f02527a9a4d9b719cd49 |
| SHA512 | 7c28ba260fe53879b6e8f69d65c4263d454d75033889162d000c421695e634aeb13f4d4c2b999934f8eb2e58d62913764f1590689925e120600155d8390d0a48 |
C:\Users\Admin\AppData\Local\daf37fd1-3676-41fe-a870-da4e7e1e0bce\build2.exe
| MD5 | 6b343cd7dea3ae28d0819bc55a2f86fe |
| SHA1 | cedd49849a5dd678d0a55da607e9b28a9680073c |
| SHA256 | 4240b655ed2af5ae8873b49e2e2d204383b2fd675c21f02527a9a4d9b719cd49 |
| SHA512 | 7c28ba260fe53879b6e8f69d65c4263d454d75033889162d000c421695e634aeb13f4d4c2b999934f8eb2e58d62913764f1590689925e120600155d8390d0a48 |
memory/4456-160-0x0000000000400000-0x000000000046C000-memory.dmp
memory/1532-163-0x00000000005F0000-0x0000000000647000-memory.dmp
memory/4456-162-0x0000000000400000-0x000000000046C000-memory.dmp
C:\Users\Admin\AppData\Local\daf37fd1-3676-41fe-a870-da4e7e1e0bce\build2.exe
| MD5 | 6b343cd7dea3ae28d0819bc55a2f86fe |
| SHA1 | cedd49849a5dd678d0a55da607e9b28a9680073c |
| SHA256 | 4240b655ed2af5ae8873b49e2e2d204383b2fd675c21f02527a9a4d9b719cd49 |
| SHA512 | 7c28ba260fe53879b6e8f69d65c4263d454d75033889162d000c421695e634aeb13f4d4c2b999934f8eb2e58d62913764f1590689925e120600155d8390d0a48 |
memory/4456-164-0x0000000000400000-0x000000000046C000-memory.dmp
C:\Users\Admin\AppData\Local\daf37fd1-3676-41fe-a870-da4e7e1e0bce\build3.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/944-171-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\daf37fd1-3676-41fe-a870-da4e7e1e0bce\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/4456-174-0x0000000000400000-0x000000000046C000-memory.dmp
memory/944-175-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4456-186-0x0000000061E00000-0x0000000061EF3000-memory.dmp
\ProgramData\nss3.dll
| MD5 | 1cc453cdf74f31e4d913ff9c10acdde2 |
| SHA1 | 6e85eae544d6e965f15fa5c39700fa7202f3aafe |
| SHA256 | ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5 |
| SHA512 | dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571 |
\ProgramData\mozglue.dll
| MD5 | c8fd9be83bc728cc04beffafc2907fe9 |
| SHA1 | 95ab9f701e0024cedfbd312bcfe4e726744c4f2e |
| SHA256 | ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a |
| SHA512 | fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040 |
memory/4456-228-0x0000000000400000-0x000000000046C000-memory.dmp
memory/4456-241-0x0000000000400000-0x000000000046C000-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/4456-244-0x0000000000400000-0x000000000046C000-memory.dmp
memory/4456-245-0x0000000000400000-0x000000000046C000-memory.dmp
memory/4456-246-0x0000000000400000-0x000000000046C000-memory.dmp