Analysis Overview
SHA256
21a2020eb126e7c1848887f7641341da5377a5e54f2368d4f1671bbd5a7eee67
Threat Level: Known bad
The file 21a2020eb126e7c1848887f7641341da5377a5e54f2368d4f1671bbd5a7eee67 was found to be: Known bad.
Malicious Activity Summary
Djvu Ransomware
Detected Djvu ransomware
Vidar
Downloads MZ/PE file
Modifies file permissions
Checks computer location settings
Loads dropped DLL
Executes dropped EXE
Reads user/profile data of web browsers
Accesses 2FA software files, possible credential harvesting
Checks installed software on the system
Accesses cryptocurrency files/wallets, possible credential harvesting
Looks up external IP address via web service
Adds Run key to start application
Suspicious use of SetThreadContext
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Delays execution with timeout.exe
Checks processor information in registry
Creates scheduled task(s)
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2023-02-16 20:53
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2023-02-16 20:53
Reported
2023-02-16 20:56
Platform
win10v2004-20221111-en
Max time kernel
63s
Max time network
143s
Command Line
Signatures
Detected Djvu ransomware
| Description | Indicator | Process | Target |
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Djvu Ransomware
Vidar
Downloads MZ/PE file
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\21a2020eb126e7c1848887f7641341da5377a5e54f2368d4f1671bbd5a7eee67.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\21a2020eb126e7c1848887f7641341da5377a5e54f2368d4f1671bbd5a7eee67.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\a7afa885-6c8a-4574-88a1-58c7c1fdb21a\build2.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\a7afa885-6c8a-4574-88a1-58c7c1fdb21a\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\a7afa885-6c8a-4574-88a1-58c7c1fdb21a\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\a7afa885-6c8a-4574-88a1-58c7c1fdb21a\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\a7afa885-6c8a-4574-88a1-58c7c1fdb21a\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\a7afa885-6c8a-4574-88a1-58c7c1fdb21a\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-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\da6449f9-4714-411b-bc47-5a362ecb5666\\21a2020eb126e7c1848887f7641341da5377a5e54f2368d4f1671bbd5a7eee67.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\21a2020eb126e7c1848887f7641341da5377a5e54f2368d4f1671bbd5a7eee67.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 4576 set thread context of 1592 | N/A | C:\Users\Admin\AppData\Local\Temp\21a2020eb126e7c1848887f7641341da5377a5e54f2368d4f1671bbd5a7eee67.exe | C:\Users\Admin\AppData\Local\Temp\21a2020eb126e7c1848887f7641341da5377a5e54f2368d4f1671bbd5a7eee67.exe |
| PID 1424 set thread context of 4652 | N/A | C:\Users\Admin\AppData\Local\Temp\21a2020eb126e7c1848887f7641341da5377a5e54f2368d4f1671bbd5a7eee67.exe | C:\Users\Admin\AppData\Local\Temp\21a2020eb126e7c1848887f7641341da5377a5e54f2368d4f1671bbd5a7eee67.exe |
| PID 2544 set thread context of 3680 | N/A | C:\Users\Admin\AppData\Local\a7afa885-6c8a-4574-88a1-58c7c1fdb21a\build2.exe | C:\Users\Admin\AppData\Local\a7afa885-6c8a-4574-88a1-58c7c1fdb21a\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\a7afa885-6c8a-4574-88a1-58c7c1fdb21a\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\a7afa885-6c8a-4574-88a1-58c7c1fdb21a\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\21a2020eb126e7c1848887f7641341da5377a5e54f2368d4f1671bbd5a7eee67.exe
"C:\Users\Admin\AppData\Local\Temp\21a2020eb126e7c1848887f7641341da5377a5e54f2368d4f1671bbd5a7eee67.exe"
C:\Users\Admin\AppData\Local\Temp\21a2020eb126e7c1848887f7641341da5377a5e54f2368d4f1671bbd5a7eee67.exe
"C:\Users\Admin\AppData\Local\Temp\21a2020eb126e7c1848887f7641341da5377a5e54f2368d4f1671bbd5a7eee67.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\da6449f9-4714-411b-bc47-5a362ecb5666" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\21a2020eb126e7c1848887f7641341da5377a5e54f2368d4f1671bbd5a7eee67.exe
"C:\Users\Admin\AppData\Local\Temp\21a2020eb126e7c1848887f7641341da5377a5e54f2368d4f1671bbd5a7eee67.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\21a2020eb126e7c1848887f7641341da5377a5e54f2368d4f1671bbd5a7eee67.exe
"C:\Users\Admin\AppData\Local\Temp\21a2020eb126e7c1848887f7641341da5377a5e54f2368d4f1671bbd5a7eee67.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\a7afa885-6c8a-4574-88a1-58c7c1fdb21a\build2.exe
"C:\Users\Admin\AppData\Local\a7afa885-6c8a-4574-88a1-58c7c1fdb21a\build2.exe"
C:\Users\Admin\AppData\Local\a7afa885-6c8a-4574-88a1-58c7c1fdb21a\build2.exe
"C:\Users\Admin\AppData\Local\a7afa885-6c8a-4574-88a1-58c7c1fdb21a\build2.exe"
C:\Users\Admin\AppData\Local\a7afa885-6c8a-4574-88a1-58c7c1fdb21a\build3.exe
"C:\Users\Admin\AppData\Local\a7afa885-6c8a-4574-88a1-58c7c1fdb21a\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\a7afa885-6c8a-4574-88a1-58c7c1fdb21a\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 |
| 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 | bihsy.com | udp |
| PE | 190.117.75.91:80 | bihsy.com | tcp |
| KR | 211.53.230.67:80 | bihsy.com | tcp |
| KR | 211.53.230.67:80 | bihsy.com | tcp |
| US | 8.8.8.8:53 | t.me | udp |
| NL | 149.154.167.99:443 | t.me | tcp |
| DE | 168.119.59.211:80 | 168.119.59.211 | tcp |
| US | 72.21.91.29:80 | tcp | |
| NL | 104.80.225.205:443 | tcp | |
| JP | 40.79.189.59:443 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 93.184.221.240:80 | tcp |
Files
memory/1592-132-0x0000000000000000-mapping.dmp
memory/1592-134-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4576-135-0x0000000002410000-0x00000000024A2000-memory.dmp
memory/4576-136-0x00000000024C0000-0x00000000025DB000-memory.dmp
memory/1592-133-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1592-137-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1592-138-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4672-139-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\da6449f9-4714-411b-bc47-5a362ecb5666\21a2020eb126e7c1848887f7641341da5377a5e54f2368d4f1671bbd5a7eee67.exe
| MD5 | f6913fb3a5ea8ef054110894763c7ffa |
| SHA1 | 965b0c399f7c9bbd39198fff2b0a6117e9fbdaa9 |
| SHA256 | 21a2020eb126e7c1848887f7641341da5377a5e54f2368d4f1671bbd5a7eee67 |
| SHA512 | 9ca93bb426c816ce52d981790f191befc515e7d3136c85590ead221c2525f8aeafa43a0da77611433ff48d91ba200100003e222f7d75e039205d42111c10cf5b |
memory/1424-141-0x0000000000000000-mapping.dmp
memory/1592-142-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4652-143-0x0000000000000000-mapping.dmp
memory/1424-146-0x00000000022E8000-0x000000000237A000-memory.dmp
memory/4652-145-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4652-147-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | 0e8f1fb71254974e1d528b62e7b02e8b |
| SHA1 | 2275bdfb4779b15a886d9558ee3e0ce97112ddee |
| SHA256 | f5e027fd76267c7668098a78724a82ca20ffb6818fc4e5b6eb9669866f32800c |
| SHA512 | f084ae94658a9a8db6da8437cd8ad913e9820ff6f05f974ca165ee7af98a0cbf32e87fde1e263c9a7ec9d7877de44ee0ab1dd22269135a03a922d7dcc6473304 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | 7944660a8a8a0d93dffcab657c386e0f |
| SHA1 | 34c9d07752c4a7c4bff74194bc8b27eac0f58808 |
| SHA256 | 507a83b01100d24794535ce22bd0033eba8265d7f0840ff54f0d993541970155 |
| SHA512 | 01a6056a6a63af5f2a3d43d21556cfcfe7b8dd53b036b85a5fc428078ef6ad6c7bfd6b03a25ba00e92ed1a5a603ae03e8bebe87d5457e5db1d6792ccaeac022f |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | e825419f5d91cbb7dd2c1407c2ae4c08 |
| SHA1 | daca95b9bffaff1aacb09d09292a41c5e98f0d12 |
| SHA256 | 01a7d3b0ef49c660185536f53cfa2744c7784aef0981df4fd03ae06770b25376 |
| SHA512 | e4c0b3dea86821de18a10f43dac1263cf917075b620cd4f6ca22331dec27ca0c89b57145e33de8f502e09c1bcfaa400d27cb601f315b1a8b4c851f15064fd514 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | 464b278eb01e7dc87fd87263b9866901 |
| SHA1 | 426e2305b6ac330cb7f41c8580da6a83da0edd38 |
| SHA256 | f852a97c264641e6097037d9480ef63b69b02b0a9c74d395604daf0158e64da2 |
| SHA512 | 81129dad4f4b69a50be5bb63f9571a39c108bf4a58d2f39f283304f92b40c671488a69e368ce8d1b3b866a3f5ae83da062aa9ebf0b433482e7ae9df3d21ee050 |
memory/4652-152-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2544-153-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\a7afa885-6c8a-4574-88a1-58c7c1fdb21a\build2.exe
| MD5 | 4c9fdfbf316f37dbcc7314e5641f9a9a |
| SHA1 | 7fa01df0e5420f9e5b69486550460e839fd0f3a3 |
| SHA256 | e661e53f429cd22e30ca6fb368f3e011e76264892f4e718c75cb3636f4f2e611 |
| SHA512 | b22c60d27ed5457677645a2b8669cd1958cc18a021e19dcf1d1a3a88ed63cd4eb749b1fe8798f651dcc5595d019ceb3cb38eae7a07ab73098eee502dbee5c32b |
C:\Users\Admin\AppData\Local\a7afa885-6c8a-4574-88a1-58c7c1fdb21a\build2.exe
| MD5 | 4c9fdfbf316f37dbcc7314e5641f9a9a |
| SHA1 | 7fa01df0e5420f9e5b69486550460e839fd0f3a3 |
| SHA256 | e661e53f429cd22e30ca6fb368f3e011e76264892f4e718c75cb3636f4f2e611 |
| SHA512 | b22c60d27ed5457677645a2b8669cd1958cc18a021e19dcf1d1a3a88ed63cd4eb749b1fe8798f651dcc5595d019ceb3cb38eae7a07ab73098eee502dbee5c32b |
memory/3680-156-0x0000000000000000-mapping.dmp
memory/3680-157-0x0000000000400000-0x0000000000472000-memory.dmp
memory/3680-159-0x0000000000400000-0x0000000000472000-memory.dmp
memory/2544-162-0x00000000021E0000-0x000000000223E000-memory.dmp
memory/3680-161-0x0000000000400000-0x0000000000472000-memory.dmp
memory/2544-160-0x0000000000708000-0x000000000073C000-memory.dmp
C:\Users\Admin\AppData\Local\a7afa885-6c8a-4574-88a1-58c7c1fdb21a\build2.exe
| MD5 | 4c9fdfbf316f37dbcc7314e5641f9a9a |
| SHA1 | 7fa01df0e5420f9e5b69486550460e839fd0f3a3 |
| SHA256 | e661e53f429cd22e30ca6fb368f3e011e76264892f4e718c75cb3636f4f2e611 |
| SHA512 | b22c60d27ed5457677645a2b8669cd1958cc18a021e19dcf1d1a3a88ed63cd4eb749b1fe8798f651dcc5595d019ceb3cb38eae7a07ab73098eee502dbee5c32b |
memory/3476-163-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\a7afa885-6c8a-4574-88a1-58c7c1fdb21a\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\a7afa885-6c8a-4574-88a1-58c7c1fdb21a\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/2640-166-0x0000000000000000-mapping.dmp
memory/3680-167-0x0000000000400000-0x0000000000472000-memory.dmp
memory/4652-168-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3680-169-0x0000000050CE0000-0x0000000050DD3000-memory.dmp
C:\ProgramData\nss3.dll
| MD5 | 1cc453cdf74f31e4d913ff9c10acdde2 |
| SHA1 | 6e85eae544d6e965f15fa5c39700fa7202f3aafe |
| SHA256 | ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5 |
| SHA512 | dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571 |
C:\ProgramData\mozglue.dll
| MD5 | c8fd9be83bc728cc04beffafc2907fe9 |
| SHA1 | 95ab9f701e0024cedfbd312bcfe4e726744c4f2e |
| SHA256 | ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a |
| SHA512 | fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040 |
memory/4304-189-0x0000000000000000-mapping.dmp
memory/3680-190-0x0000000000400000-0x0000000000472000-memory.dmp
memory/4552-191-0x0000000000000000-mapping.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/4236-194-0x0000000000000000-mapping.dmp