Analysis Overview
SHA256
4a156521f32254d8cd2f78f9132248633552e749fd4e4c03391f244a9aeeee95
Threat Level: Known bad
The file 4a156521f32254d8cd2f78f9132248633552e749fd4e4c03391f244a9aeeee95 was found to be: Known bad.
Malicious Activity Summary
Vidar
Detected Djvu ransomware
Djvu Ransomware
Downloads MZ/PE file
Loads dropped DLL
Modifies file permissions
Executes dropped EXE
Reads user/profile data of web browsers
Accesses cryptocurrency files/wallets, possible credential harvesting
Accesses 2FA software files, possible credential harvesting
Checks installed software on the system
Adds Run key to start application
Looks up external IP address via web service
Suspicious use of SetThreadContext
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Delays execution with timeout.exe
Checks processor information in registry
Creates scheduled task(s)
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2023-03-28 07:21
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2023-03-28 07:21
Reported
2023-03-28 07:24
Platform
win10-20230220-en
Max time kernel
144s
Max time network
125s
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\7ccd56df-e387-4937-8bdf-a2b31f02d722\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\7ccd56df-e387-4937-8bdf-a2b31f02d722\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\7ccd56df-e387-4937-8bdf-a2b31f02d722\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\7ccd56df-e387-4937-8bdf-a2b31f02d722\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\7ccd56df-e387-4937-8bdf-a2b31f02d722\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\\8f6b6f08-8256-420e-972a-e76628628614\\4a156521f32254d8cd2f78f9132248633552e749fd4e4c03391f244a9aeeee95.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\4a156521f32254d8cd2f78f9132248633552e749fd4e4c03391f244a9aeeee95.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 4140 set thread context of 3528 | N/A | C:\Users\Admin\AppData\Local\Temp\4a156521f32254d8cd2f78f9132248633552e749fd4e4c03391f244a9aeeee95.exe | C:\Users\Admin\AppData\Local\Temp\4a156521f32254d8cd2f78f9132248633552e749fd4e4c03391f244a9aeeee95.exe |
| PID 4528 set thread context of 2516 | N/A | C:\Users\Admin\AppData\Local\Temp\4a156521f32254d8cd2f78f9132248633552e749fd4e4c03391f244a9aeeee95.exe | C:\Users\Admin\AppData\Local\Temp\4a156521f32254d8cd2f78f9132248633552e749fd4e4c03391f244a9aeeee95.exe |
| PID 4860 set thread context of 4192 | N/A | C:\Users\Admin\AppData\Local\7ccd56df-e387-4937-8bdf-a2b31f02d722\build2.exe | C:\Users\Admin\AppData\Local\7ccd56df-e387-4937-8bdf-a2b31f02d722\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\7ccd56df-e387-4937-8bdf-a2b31f02d722\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\7ccd56df-e387-4937-8bdf-a2b31f02d722\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\4a156521f32254d8cd2f78f9132248633552e749fd4e4c03391f244a9aeeee95.exe
"C:\Users\Admin\AppData\Local\Temp\4a156521f32254d8cd2f78f9132248633552e749fd4e4c03391f244a9aeeee95.exe"
C:\Users\Admin\AppData\Local\Temp\4a156521f32254d8cd2f78f9132248633552e749fd4e4c03391f244a9aeeee95.exe
"C:\Users\Admin\AppData\Local\Temp\4a156521f32254d8cd2f78f9132248633552e749fd4e4c03391f244a9aeeee95.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\8f6b6f08-8256-420e-972a-e76628628614" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\4a156521f32254d8cd2f78f9132248633552e749fd4e4c03391f244a9aeeee95.exe
"C:\Users\Admin\AppData\Local\Temp\4a156521f32254d8cd2f78f9132248633552e749fd4e4c03391f244a9aeeee95.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\4a156521f32254d8cd2f78f9132248633552e749fd4e4c03391f244a9aeeee95.exe
"C:\Users\Admin\AppData\Local\Temp\4a156521f32254d8cd2f78f9132248633552e749fd4e4c03391f244a9aeeee95.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\7ccd56df-e387-4937-8bdf-a2b31f02d722\build2.exe
"C:\Users\Admin\AppData\Local\7ccd56df-e387-4937-8bdf-a2b31f02d722\build2.exe"
C:\Users\Admin\AppData\Local\7ccd56df-e387-4937-8bdf-a2b31f02d722\build2.exe
"C:\Users\Admin\AppData\Local\7ccd56df-e387-4937-8bdf-a2b31f02d722\build2.exe"
C:\Users\Admin\AppData\Local\7ccd56df-e387-4937-8bdf-a2b31f02d722\build3.exe
"C:\Users\Admin\AppData\Local\7ccd56df-e387-4937-8bdf-a2b31f02d722\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\7ccd56df-e387-4937-8bdf-a2b31f02d722\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 |
| 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 |
| KR | 211.53.230.67:80 | uaery.top | tcp |
| PA | 190.140.74.43:80 | zexeq.com | tcp |
| US | 8.8.8.8:53 | 67.230.53.211.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.74.140.190.in-addr.arpa | udp |
| PA | 190.140.74.43:80 | 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 |
| FR | 40.79.141.152:443 | tcp | |
| NL | 88.221.25.155:80 | tcp | |
| US | 8.8.8.8:53 | 44.8.109.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 154.25.221.88.in-addr.arpa | udp |
Files
memory/3528-117-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4140-119-0x0000000004A90000-0x0000000004BAB000-memory.dmp
memory/3528-118-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3528-120-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3528-121-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\8f6b6f08-8256-420e-972a-e76628628614\4a156521f32254d8cd2f78f9132248633552e749fd4e4c03391f244a9aeeee95.exe
| MD5 | 8c5fd744b770679efe17cba165397e07 |
| SHA1 | 675e1821b49088391974556874e9c278f29c6b20 |
| SHA256 | 4a156521f32254d8cd2f78f9132248633552e749fd4e4c03391f244a9aeeee95 |
| SHA512 | d400852aa95a7bb2c72b5c01503f6c83e66d7aec64e64511024d08a99314d8ed1a34c2b963b7186ed4e18d60fc15751d4c8d83ae7c47c7e796d82ecd9f0ef896 |
memory/3528-132-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2516-136-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2516-137-0x0000000000400000-0x0000000000537000-memory.dmp
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 | adb06ff4418b831d6aa979ecefe9cb01 |
| SHA1 | c002b996d83236f342973c21ab4934ac248bb4d5 |
| SHA256 | de010ccfc52fc93b2b125f9b95be9c4458e3312a6c08f50a8be24f0ea9f2698d |
| SHA512 | ce10c0986de8e3063ca2291e44b1a6d0280c33bf22c0456c44be3c5d275c9aac363a56a33048793fb20a9492849cf051e56d7de80f8cdf9d97e6eb2007c07a02 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | d940c25e4f010754f8daf66f497c80f7 |
| SHA1 | 7236b6210e489fe27074caf656ba723b397d68e5 |
| SHA256 | e0579232b50ee1cf226a7db24b64102eb0baa2905d7fe190466acb2d2bbcf543 |
| SHA512 | 4972d540ea29b15a967f3ae60c24c9c0eea03f564c1775917121c9f60d9a7feaa3c620f40211e614f9c9f49b3fcafa0455608e18a863337433ce02832df35516 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | e5b1cc0ae5af6a8277d75cff4af2c5e8 |
| SHA1 | 4768fff3d4bbe02f89683b4a0e7b15b24b54eb9f |
| SHA256 | d950c0d748aae641d71b11cd1c519b289917c23bee1a2b6bc5c496fd8e5d4655 |
| SHA512 | 57a4737deeefac0124d73b52525993fecbbebd21a556ece87f8e79e845e07f037abb5e49f7458e8a010935c6691f18fbb913d77ecfb2ba902067788c483ec3d7 |
memory/2516-142-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2516-144-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2516-148-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2516-150-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2516-151-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2516-155-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\7ccd56df-e387-4937-8bdf-a2b31f02d722\build2.exe
| MD5 | 6b343cd7dea3ae28d0819bc55a2f86fe |
| SHA1 | cedd49849a5dd678d0a55da607e9b28a9680073c |
| SHA256 | 4240b655ed2af5ae8873b49e2e2d204383b2fd675c21f02527a9a4d9b719cd49 |
| SHA512 | 7c28ba260fe53879b6e8f69d65c4263d454d75033889162d000c421695e634aeb13f4d4c2b999934f8eb2e58d62913764f1590689925e120600155d8390d0a48 |
C:\Users\Admin\AppData\Local\7ccd56df-e387-4937-8bdf-a2b31f02d722\build2.exe
| MD5 | 6b343cd7dea3ae28d0819bc55a2f86fe |
| SHA1 | cedd49849a5dd678d0a55da607e9b28a9680073c |
| SHA256 | 4240b655ed2af5ae8873b49e2e2d204383b2fd675c21f02527a9a4d9b719cd49 |
| SHA512 | 7c28ba260fe53879b6e8f69d65c4263d454d75033889162d000c421695e634aeb13f4d4c2b999934f8eb2e58d62913764f1590689925e120600155d8390d0a48 |
memory/4192-161-0x0000000000400000-0x000000000046C000-memory.dmp
C:\Users\Admin\AppData\Local\7ccd56df-e387-4937-8bdf-a2b31f02d722\build2.exe
| MD5 | 6b343cd7dea3ae28d0819bc55a2f86fe |
| SHA1 | cedd49849a5dd678d0a55da607e9b28a9680073c |
| SHA256 | 4240b655ed2af5ae8873b49e2e2d204383b2fd675c21f02527a9a4d9b719cd49 |
| SHA512 | 7c28ba260fe53879b6e8f69d65c4263d454d75033889162d000c421695e634aeb13f4d4c2b999934f8eb2e58d62913764f1590689925e120600155d8390d0a48 |
memory/4192-163-0x0000000000400000-0x000000000046C000-memory.dmp
memory/4860-164-0x0000000000620000-0x0000000000677000-memory.dmp
memory/4192-165-0x0000000000400000-0x000000000046C000-memory.dmp
C:\Users\Admin\AppData\Local\7ccd56df-e387-4937-8bdf-a2b31f02d722\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/2516-171-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\7ccd56df-e387-4937-8bdf-a2b31f02d722\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/4192-175-0x0000000000400000-0x000000000046C000-memory.dmp
memory/4192-187-0x0000000061E00000-0x0000000061EF3000-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/4192-230-0x0000000000400000-0x000000000046C000-memory.dmp
memory/4192-244-0x0000000000400000-0x000000000046C000-memory.dmp
memory/4192-246-0x0000000000400000-0x000000000046C000-memory.dmp
memory/4192-251-0x0000000000400000-0x000000000046C000-memory.dmp