Analysis Overview
SHA256
ab25b9a451f0447951665c1a0a1d3f4009d3020d5450ddc66c5d01b49465a8f4
Threat Level: Known bad
The file ab25b9a451f0447951665c1a0a1d3f4009d3020d5450ddc66c5d01b49465a8f4 was found to be: Known bad.
Malicious Activity Summary
Djvu Ransomware
Vidar
Detected Djvu ransomware
Downloads MZ/PE file
Reads user/profile data of web browsers
Executes dropped EXE
Loads dropped DLL
Modifies file permissions
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks installed software on the system
Accesses 2FA software files, possible credential harvesting
Adds Run key to start application
Looks up external IP address via web service
Suspicious use of SetThreadContext
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Delays execution with timeout.exe
Creates scheduled task(s)
Checks processor information in registry
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2023-03-28 03:23
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2023-03-28 03:23
Reported
2023-03-28 03:26
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\add90eda-9a9e-4b1e-a104-aecd28f9fc4a\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\add90eda-9a9e-4b1e-a104-aecd28f9fc4a\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\add90eda-9a9e-4b1e-a104-aecd28f9fc4a\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\add90eda-9a9e-4b1e-a104-aecd28f9fc4a\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\add90eda-9a9e-4b1e-a104-aecd28f9fc4a\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-1-5-21-3346939869-2835594282-3775165920-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\8669c205-48ee-4a2d-867c-5e63017f45ee\\ab25b9a451f0447951665c1a0a1d3f4009d3020d5450ddc66c5d01b49465a8f4.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\ab25b9a451f0447951665c1a0a1d3f4009d3020d5450ddc66c5d01b49465a8f4.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 2208 set thread context of 4636 | N/A | C:\Users\Admin\AppData\Local\Temp\ab25b9a451f0447951665c1a0a1d3f4009d3020d5450ddc66c5d01b49465a8f4.exe | C:\Users\Admin\AppData\Local\Temp\ab25b9a451f0447951665c1a0a1d3f4009d3020d5450ddc66c5d01b49465a8f4.exe |
| PID 4552 set thread context of 1400 | N/A | C:\Users\Admin\AppData\Local\Temp\ab25b9a451f0447951665c1a0a1d3f4009d3020d5450ddc66c5d01b49465a8f4.exe | C:\Users\Admin\AppData\Local\Temp\ab25b9a451f0447951665c1a0a1d3f4009d3020d5450ddc66c5d01b49465a8f4.exe |
| PID 3636 set thread context of 4404 | N/A | C:\Users\Admin\AppData\Local\add90eda-9a9e-4b1e-a104-aecd28f9fc4a\build2.exe | C:\Users\Admin\AppData\Local\add90eda-9a9e-4b1e-a104-aecd28f9fc4a\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\add90eda-9a9e-4b1e-a104-aecd28f9fc4a\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\add90eda-9a9e-4b1e-a104-aecd28f9fc4a\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\ab25b9a451f0447951665c1a0a1d3f4009d3020d5450ddc66c5d01b49465a8f4.exe
"C:\Users\Admin\AppData\Local\Temp\ab25b9a451f0447951665c1a0a1d3f4009d3020d5450ddc66c5d01b49465a8f4.exe"
C:\Users\Admin\AppData\Local\Temp\ab25b9a451f0447951665c1a0a1d3f4009d3020d5450ddc66c5d01b49465a8f4.exe
"C:\Users\Admin\AppData\Local\Temp\ab25b9a451f0447951665c1a0a1d3f4009d3020d5450ddc66c5d01b49465a8f4.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\8669c205-48ee-4a2d-867c-5e63017f45ee" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\ab25b9a451f0447951665c1a0a1d3f4009d3020d5450ddc66c5d01b49465a8f4.exe
"C:\Users\Admin\AppData\Local\Temp\ab25b9a451f0447951665c1a0a1d3f4009d3020d5450ddc66c5d01b49465a8f4.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\ab25b9a451f0447951665c1a0a1d3f4009d3020d5450ddc66c5d01b49465a8f4.exe
"C:\Users\Admin\AppData\Local\Temp\ab25b9a451f0447951665c1a0a1d3f4009d3020d5450ddc66c5d01b49465a8f4.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\add90eda-9a9e-4b1e-a104-aecd28f9fc4a\build2.exe
"C:\Users\Admin\AppData\Local\add90eda-9a9e-4b1e-a104-aecd28f9fc4a\build2.exe"
C:\Users\Admin\AppData\Local\add90eda-9a9e-4b1e-a104-aecd28f9fc4a\build2.exe
"C:\Users\Admin\AppData\Local\add90eda-9a9e-4b1e-a104-aecd28f9fc4a\build2.exe"
C:\Users\Admin\AppData\Local\add90eda-9a9e-4b1e-a104-aecd28f9fc4a\build3.exe
"C:\Users\Admin\AppData\Local\add90eda-9a9e-4b1e-a104-aecd28f9fc4a\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:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\add90eda-9a9e-4b1e-a104-aecd28f9fc4a\build2.exe" & exit
C:\Windows\SysWOW64\timeout.exe
timeout /t 6
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 |
| 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 |
| 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 |
| HU | 5.204.160.31:80 | uaery.top | tcp |
| US | 8.8.8.8:53 | zexeq.com | udp |
| MX | 187.170.21.149:80 | zexeq.com | tcp |
| US | 8.8.8.8:53 | 31.160.204.5.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 149.21.170.187.in-addr.arpa | udp |
| MX | 187.170.21.149:80 | 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 | 23.249.124.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 236.10.203.116.in-addr.arpa | udp |
| NL | 52.178.17.3:443 | tcp | |
| NL | 8.238.21.126:80 | tcp | |
| US | 8.8.8.8:53 | 64.13.109.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 154.25.221.88.in-addr.arpa | udp |
Files
memory/2208-121-0x00000000025B0000-0x00000000026CB000-memory.dmp
memory/4636-122-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4636-123-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4636-124-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4636-125-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\8669c205-48ee-4a2d-867c-5e63017f45ee\ab25b9a451f0447951665c1a0a1d3f4009d3020d5450ddc66c5d01b49465a8f4.exe
| MD5 | b3cb691300ea7f2f3b38ca82d46748b7 |
| SHA1 | a30a00bee125f6d4dad19de74e14a382204439dc |
| SHA256 | ab25b9a451f0447951665c1a0a1d3f4009d3020d5450ddc66c5d01b49465a8f4 |
| SHA512 | fc8db2f2eed4525bf743ca9678b253fea8f38044981e43261786185468cf299b22ea5c468664df479d36418311a7bcca76603dd2f3449d1e126a94901075d796 |
memory/4636-136-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1400-140-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1400-141-0x0000000000400000-0x0000000000537000-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 | e64ba2f2a452a94ada23cb13dac86949 |
| SHA1 | f12bf5cf2537a8d723bbe8be91f5f08fb8d86f71 |
| SHA256 | 446a1af99cf45f60c193f9cc301927b6145c49afb28c3147fdbdd867b865f8d2 |
| SHA512 | b5424d5b7a0a82ab4b27bc3b66f61fae81424d6fa6103d67422ac916bc200ac9b8aa222077d33c2bc06d3a0b235cccd81ace17004957c825e0184a49135b4935 |
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 | c6ab035e8d654e49d6eddfda702bc84d |
| SHA1 | 3566833f224606ac0fd36abda5cb5615320fd63a |
| SHA256 | 55c246263d975682d68689c86776ca6d51124d6203901c65c03add049f4f4bef |
| SHA512 | a117036dcded1719cf481059fa79991c8b7e006a4b9ff5fb71affac92fd63738a8f6bdc40512521443645903b4071f8d5c5832632d94776eabe9c1f7d0573cb0 |
memory/1400-146-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1400-147-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1400-148-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1400-152-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1400-154-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1400-155-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1400-156-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\add90eda-9a9e-4b1e-a104-aecd28f9fc4a\build2.exe
| MD5 | 6b343cd7dea3ae28d0819bc55a2f86fe |
| SHA1 | cedd49849a5dd678d0a55da607e9b28a9680073c |
| SHA256 | 4240b655ed2af5ae8873b49e2e2d204383b2fd675c21f02527a9a4d9b719cd49 |
| SHA512 | 7c28ba260fe53879b6e8f69d65c4263d454d75033889162d000c421695e634aeb13f4d4c2b999934f8eb2e58d62913764f1590689925e120600155d8390d0a48 |
C:\Users\Admin\AppData\Local\add90eda-9a9e-4b1e-a104-aecd28f9fc4a\build2.exe
| MD5 | 6b343cd7dea3ae28d0819bc55a2f86fe |
| SHA1 | cedd49849a5dd678d0a55da607e9b28a9680073c |
| SHA256 | 4240b655ed2af5ae8873b49e2e2d204383b2fd675c21f02527a9a4d9b719cd49 |
| SHA512 | 7c28ba260fe53879b6e8f69d65c4263d454d75033889162d000c421695e634aeb13f4d4c2b999934f8eb2e58d62913764f1590689925e120600155d8390d0a48 |
memory/4404-165-0x0000000000400000-0x000000000046C000-memory.dmp
memory/3636-168-0x00000000020A0000-0x00000000020F7000-memory.dmp
memory/4404-167-0x0000000000400000-0x000000000046C000-memory.dmp
C:\Users\Admin\AppData\Local\add90eda-9a9e-4b1e-a104-aecd28f9fc4a\build2.exe
| MD5 | 6b343cd7dea3ae28d0819bc55a2f86fe |
| SHA1 | cedd49849a5dd678d0a55da607e9b28a9680073c |
| SHA256 | 4240b655ed2af5ae8873b49e2e2d204383b2fd675c21f02527a9a4d9b719cd49 |
| SHA512 | 7c28ba260fe53879b6e8f69d65c4263d454d75033889162d000c421695e634aeb13f4d4c2b999934f8eb2e58d62913764f1590689925e120600155d8390d0a48 |
memory/4404-169-0x0000000000400000-0x000000000046C000-memory.dmp
memory/1400-175-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\add90eda-9a9e-4b1e-a104-aecd28f9fc4a\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\add90eda-9a9e-4b1e-a104-aecd28f9fc4a\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/4404-180-0x0000000000400000-0x000000000046C000-memory.dmp
memory/4404-191-0x0000000061E00000-0x0000000061EF3000-memory.dmp
\ProgramData\nss3.dll
| MD5 | 1cc453cdf74f31e4d913ff9c10acdde2 |
| SHA1 | 6e85eae544d6e965f15fa5c39700fa7202f3aafe |
| SHA256 | ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5 |
| SHA512 | dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571 |
\ProgramData\mozglue.dll
| MD5 | c8fd9be83bc728cc04beffafc2907fe9 |
| SHA1 | 95ab9f701e0024cedfbd312bcfe4e726744c4f2e |
| SHA256 | ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a |
| SHA512 | fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040 |
memory/4404-233-0x0000000000400000-0x000000000046C000-memory.dmp
memory/4404-250-0x0000000000400000-0x000000000046C000-memory.dmp
memory/4404-252-0x0000000000400000-0x000000000046C000-memory.dmp
memory/4404-253-0x0000000000400000-0x000000000046C000-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 |