Analysis Overview
SHA256
4d4fe27f46f12dd2baa917e11272423ba279e996ad44803389cdae8b70c5e9fc
Threat Level: Known bad
The file 4d4fe27f46f12dd2baa917e11272423ba279e996ad44803389cdae8b70c5e9fc was found to be: Known bad.
Malicious Activity Summary
Vidar
Djvu Ransomware
Detected Djvu ransomware
Downloads MZ/PE file
Reads user/profile data of web browsers
Executes dropped EXE
Loads dropped DLL
Modifies file permissions
Adds Run key to start application
Looks up external IP address via web service
Accesses cryptocurrency files/wallets, possible credential harvesting
Accesses 2FA software files, possible credential harvesting
Checks installed software on the system
Suspicious use of SetThreadContext
Enumerates physical storage devices
Creates scheduled task(s)
Suspicious use of WriteProcessMemory
Delays execution with timeout.exe
Checks processor information in registry
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2023-03-28 01:06
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2023-03-28 01:06
Reported
2023-03-28 01:09
Platform
win10-20230220-en
Max time kernel
143s
Max time network
125s
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\0a65f9dd-3c1b-45af-a1bc-123723edfb5e\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\0a65f9dd-3c1b-45af-a1bc-123723edfb5e\build3.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\0a65f9dd-3c1b-45af-a1bc-123723edfb5e\build2.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\0a65f9dd-3c1b-45af-a1bc-123723edfb5e\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\0a65f9dd-3c1b-45af-a1bc-123723edfb5e\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\\c025229c-0bf3-42e4-b8dd-3611149d37f4\\4d4fe27f46f12dd2baa917e11272423ba279e996ad44803389cdae8b70c5e9fc.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\4d4fe27f46f12dd2baa917e11272423ba279e996ad44803389cdae8b70c5e9fc.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 376 set thread context of 4268 | N/A | C:\Users\Admin\AppData\Local\Temp\4d4fe27f46f12dd2baa917e11272423ba279e996ad44803389cdae8b70c5e9fc.exe | C:\Users\Admin\AppData\Local\Temp\4d4fe27f46f12dd2baa917e11272423ba279e996ad44803389cdae8b70c5e9fc.exe |
| PID 3816 set thread context of 4756 | N/A | C:\Users\Admin\AppData\Local\Temp\4d4fe27f46f12dd2baa917e11272423ba279e996ad44803389cdae8b70c5e9fc.exe | C:\Users\Admin\AppData\Local\Temp\4d4fe27f46f12dd2baa917e11272423ba279e996ad44803389cdae8b70c5e9fc.exe |
| PID 1208 set thread context of 3576 | N/A | C:\Users\Admin\AppData\Local\0a65f9dd-3c1b-45af-a1bc-123723edfb5e\build2.exe | C:\Users\Admin\AppData\Local\0a65f9dd-3c1b-45af-a1bc-123723edfb5e\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\0a65f9dd-3c1b-45af-a1bc-123723edfb5e\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\0a65f9dd-3c1b-45af-a1bc-123723edfb5e\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\4d4fe27f46f12dd2baa917e11272423ba279e996ad44803389cdae8b70c5e9fc.exe
"C:\Users\Admin\AppData\Local\Temp\4d4fe27f46f12dd2baa917e11272423ba279e996ad44803389cdae8b70c5e9fc.exe"
C:\Users\Admin\AppData\Local\Temp\4d4fe27f46f12dd2baa917e11272423ba279e996ad44803389cdae8b70c5e9fc.exe
"C:\Users\Admin\AppData\Local\Temp\4d4fe27f46f12dd2baa917e11272423ba279e996ad44803389cdae8b70c5e9fc.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\c025229c-0bf3-42e4-b8dd-3611149d37f4" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\4d4fe27f46f12dd2baa917e11272423ba279e996ad44803389cdae8b70c5e9fc.exe
"C:\Users\Admin\AppData\Local\Temp\4d4fe27f46f12dd2baa917e11272423ba279e996ad44803389cdae8b70c5e9fc.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\4d4fe27f46f12dd2baa917e11272423ba279e996ad44803389cdae8b70c5e9fc.exe
"C:\Users\Admin\AppData\Local\Temp\4d4fe27f46f12dd2baa917e11272423ba279e996ad44803389cdae8b70c5e9fc.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\0a65f9dd-3c1b-45af-a1bc-123723edfb5e\build2.exe
"C:\Users\Admin\AppData\Local\0a65f9dd-3c1b-45af-a1bc-123723edfb5e\build2.exe"
C:\Users\Admin\AppData\Local\0a65f9dd-3c1b-45af-a1bc-123723edfb5e\build3.exe
"C:\Users\Admin\AppData\Local\0a65f9dd-3c1b-45af-a1bc-123723edfb5e\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\Local\0a65f9dd-3c1b-45af-a1bc-123723edfb5e\build2.exe
"C:\Users\Admin\AppData\Local\0a65f9dd-3c1b-45af-a1bc-123723edfb5e\build2.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\0a65f9dd-3c1b-45af-a1bc-123723edfb5e\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 |
| US | 8.8.8.8:53 | zexeq.com | udp |
| IQ | 185.95.186.58:80 | zexeq.com | tcp |
| BG | 151.251.19.81:80 | zexeq.com | tcp |
| US | 8.8.8.8:53 | 81.19.251.151.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 58.186.95.185.in-addr.arpa | udp |
| IQ | 185.95.186.58:80 | 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 | 22.249.124.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 236.10.203.116.in-addr.arpa | udp |
| IE | 20.50.73.11:443 | tcp | |
| NL | 8.238.179.126:80 | tcp | |
| US | 8.8.8.8:53 | 45.8.109.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 126.158.27.67.in-addr.arpa | udp |
Files
memory/4268-120-0x0000000000400000-0x0000000000537000-memory.dmp
memory/376-121-0x00000000025F0000-0x000000000270B000-memory.dmp
memory/4268-122-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4268-123-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4268-124-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\c025229c-0bf3-42e4-b8dd-3611149d37f4\4d4fe27f46f12dd2baa917e11272423ba279e996ad44803389cdae8b70c5e9fc.exe
| MD5 | 78ffa4992d526ce6024dc39a10359625 |
| SHA1 | df3ab3e7e04a4a7af313be76d310d3cc7c81f1fd |
| SHA256 | 4d4fe27f46f12dd2baa917e11272423ba279e996ad44803389cdae8b70c5e9fc |
| SHA512 | 66f01c35824d109c66c503c3363838fc466ddb3be6940251cec04f4c806143993dfe2f1722eecaf8c7ec2593954248fca6ba5752e8e56d6ca23092bc6622314a |
memory/4268-135-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4756-139-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4756-140-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | 4cf31dcdf7b062b037229757a8fff035 |
| SHA1 | 49745abf622e8584dba3903d656ac94d39c8949c |
| SHA256 | df96ce36c5a2990a941c65dde8e9e74ad40b57815b4718b37b1d1e384c26b152 |
| SHA512 | d9179434fa8e81b32362e2a73b5980656f86a34f4609099e8e64975b6521e16234ad8a6824aac140f10bd9f1607ea81ac154c374e17dd8bfb78208884bf7a808 |
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\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | e5b1cc0ae5af6a8277d75cff4af2c5e8 |
| SHA1 | 4768fff3d4bbe02f89683b4a0e7b15b24b54eb9f |
| SHA256 | d950c0d748aae641d71b11cd1c519b289917c23bee1a2b6bc5c496fd8e5d4655 |
| SHA512 | 57a4737deeefac0124d73b52525993fecbbebd21a556ece87f8e79e845e07f037abb5e49f7458e8a010935c6691f18fbb913d77ecfb2ba902067788c483ec3d7 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | 2567dcbc55b1d693f6758b795d51fccd |
| SHA1 | 4050b08f3b7dbbb553503e23761e55b94c999d32 |
| SHA256 | 2902dd9456c5f36cd4d7ceacee658d4a1bd8c2dadee8f6275994e98370b879d3 |
| SHA512 | c14b032056715b790296a237e655ef3d31be304188ee82c40c1e2353a8c4cf43336c77590517a63f794086301bd197cfdde36e942aa0c3e0971e950fd54f5930 |
memory/4756-145-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4756-146-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4756-147-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4756-151-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4756-154-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4756-153-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\0a65f9dd-3c1b-45af-a1bc-123723edfb5e\build2.exe
| MD5 | 6b343cd7dea3ae28d0819bc55a2f86fe |
| SHA1 | cedd49849a5dd678d0a55da607e9b28a9680073c |
| SHA256 | 4240b655ed2af5ae8873b49e2e2d204383b2fd675c21f02527a9a4d9b719cd49 |
| SHA512 | 7c28ba260fe53879b6e8f69d65c4263d454d75033889162d000c421695e634aeb13f4d4c2b999934f8eb2e58d62913764f1590689925e120600155d8390d0a48 |
C:\Users\Admin\AppData\Local\0a65f9dd-3c1b-45af-a1bc-123723edfb5e\build2.exe
| MD5 | 6b343cd7dea3ae28d0819bc55a2f86fe |
| SHA1 | cedd49849a5dd678d0a55da607e9b28a9680073c |
| SHA256 | 4240b655ed2af5ae8873b49e2e2d204383b2fd675c21f02527a9a4d9b719cd49 |
| SHA512 | 7c28ba260fe53879b6e8f69d65c4263d454d75033889162d000c421695e634aeb13f4d4c2b999934f8eb2e58d62913764f1590689925e120600155d8390d0a48 |
C:\Users\Admin\AppData\Local\0a65f9dd-3c1b-45af-a1bc-123723edfb5e\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\0a65f9dd-3c1b-45af-a1bc-123723edfb5e\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/4756-167-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/3576-172-0x0000000000400000-0x000000000046C000-memory.dmp
C:\Users\Admin\AppData\Local\0a65f9dd-3c1b-45af-a1bc-123723edfb5e\build2.exe
| MD5 | 6b343cd7dea3ae28d0819bc55a2f86fe |
| SHA1 | cedd49849a5dd678d0a55da607e9b28a9680073c |
| SHA256 | 4240b655ed2af5ae8873b49e2e2d204383b2fd675c21f02527a9a4d9b719cd49 |
| SHA512 | 7c28ba260fe53879b6e8f69d65c4263d454d75033889162d000c421695e634aeb13f4d4c2b999934f8eb2e58d62913764f1590689925e120600155d8390d0a48 |
memory/1208-175-0x0000000000710000-0x0000000000767000-memory.dmp
memory/3576-176-0x0000000000400000-0x000000000046C000-memory.dmp
memory/3576-174-0x0000000000400000-0x000000000046C000-memory.dmp
memory/4756-177-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3576-178-0x0000000000400000-0x000000000046C000-memory.dmp
memory/3576-189-0x0000000061E00000-0x0000000061EF3000-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/3576-231-0x0000000000400000-0x000000000046C000-memory.dmp
memory/3576-245-0x0000000000400000-0x000000000046C000-memory.dmp
memory/3576-246-0x0000000000400000-0x000000000046C000-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/3576-249-0x0000000000400000-0x000000000046C000-memory.dmp
memory/3576-250-0x0000000000400000-0x000000000046C000-memory.dmp