Analysis Overview
SHA256
7f39f388bfa890f7ffcd9da2153e4be453edf535728e8158226e0942ead90f08
Threat Level: Known bad
The file 7f39f388bfa890f7ffcd9da2153e4be453edf535728e8158226e0942ead90f08 was found to be: Known bad.
Malicious Activity Summary
Vidar
Detected Djvu ransomware
Djvu Ransomware
Downloads MZ/PE file
Checks computer location settings
Reads user/profile data of web browsers
Modifies file permissions
Executes dropped EXE
Loads dropped DLL
Adds Run key to start application
Accesses cryptocurrency files/wallets, possible credential harvesting
Looks up external IP address via web service
Checks installed software on the system
Accesses 2FA software files, possible credential harvesting
Suspicious use of SetThreadContext
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Delays execution with timeout.exe
Checks processor information in registry
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2023-02-16 20:20
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2023-02-16 20:20
Reported
2023-02-16 20:23
Platform
win10v2004-20221111-en
Max time kernel
79s
Max time network
144s
Command Line
Signatures
Detected Djvu ransomware
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
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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\7f39f388bfa890f7ffcd9da2153e4be453edf535728e8158226e0942ead90f08.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\7f39f388bfa890f7ffcd9da2153e4be453edf535728e8158226e0942ead90f08.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\60859b10-f148-4a2b-85ca-0cc229ab826b\build2.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\60859b10-f148-4a2b-85ca-0cc229ab826b\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\60859b10-f148-4a2b-85ca-0cc229ab826b\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\60859b10-f148-4a2b-85ca-0cc229ab826b\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\60859b10-f148-4a2b-85ca-0cc229ab826b\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\60859b10-f148-4a2b-85ca-0cc229ab826b\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\60859b10-f148-4a2b-85ca-0cc229ab826b\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\\4179b820-ea48-4dff-85ac-6da6dd60ef61\\7f39f388bfa890f7ffcd9da2153e4be453edf535728e8158226e0942ead90f08.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\7f39f388bfa890f7ffcd9da2153e4be453edf535728e8158226e0942ead90f08.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 3476 set thread context of 1132 | N/A | C:\Users\Admin\AppData\Local\Temp\7f39f388bfa890f7ffcd9da2153e4be453edf535728e8158226e0942ead90f08.exe | C:\Users\Admin\AppData\Local\Temp\7f39f388bfa890f7ffcd9da2153e4be453edf535728e8158226e0942ead90f08.exe |
| PID 4956 set thread context of 4308 | N/A | C:\Users\Admin\AppData\Local\Temp\7f39f388bfa890f7ffcd9da2153e4be453edf535728e8158226e0942ead90f08.exe | C:\Users\Admin\AppData\Local\Temp\7f39f388bfa890f7ffcd9da2153e4be453edf535728e8158226e0942ead90f08.exe |
| PID 428 set thread context of 380 | N/A | C:\Users\Admin\AppData\Local\60859b10-f148-4a2b-85ca-0cc229ab826b\build2.exe | C:\Users\Admin\AppData\Local\60859b10-f148-4a2b-85ca-0cc229ab826b\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\60859b10-f148-4a2b-85ca-0cc229ab826b\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\60859b10-f148-4a2b-85ca-0cc229ab826b\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\7f39f388bfa890f7ffcd9da2153e4be453edf535728e8158226e0942ead90f08.exe
"C:\Users\Admin\AppData\Local\Temp\7f39f388bfa890f7ffcd9da2153e4be453edf535728e8158226e0942ead90f08.exe"
C:\Users\Admin\AppData\Local\Temp\7f39f388bfa890f7ffcd9da2153e4be453edf535728e8158226e0942ead90f08.exe
"C:\Users\Admin\AppData\Local\Temp\7f39f388bfa890f7ffcd9da2153e4be453edf535728e8158226e0942ead90f08.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\4179b820-ea48-4dff-85ac-6da6dd60ef61" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\7f39f388bfa890f7ffcd9da2153e4be453edf535728e8158226e0942ead90f08.exe
"C:\Users\Admin\AppData\Local\Temp\7f39f388bfa890f7ffcd9da2153e4be453edf535728e8158226e0942ead90f08.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\7f39f388bfa890f7ffcd9da2153e4be453edf535728e8158226e0942ead90f08.exe
"C:\Users\Admin\AppData\Local\Temp\7f39f388bfa890f7ffcd9da2153e4be453edf535728e8158226e0942ead90f08.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\60859b10-f148-4a2b-85ca-0cc229ab826b\build2.exe
"C:\Users\Admin\AppData\Local\60859b10-f148-4a2b-85ca-0cc229ab826b\build2.exe"
C:\Users\Admin\AppData\Local\60859b10-f148-4a2b-85ca-0cc229ab826b\build2.exe
"C:\Users\Admin\AppData\Local\60859b10-f148-4a2b-85ca-0cc229ab826b\build2.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\60859b10-f148-4a2b-85ca-0cc229ab826b\build2.exe" & exit
C:\Windows\SysWOW64\timeout.exe
timeout /t 6
C:\Users\Admin\AppData\Local\60859b10-f148-4a2b-85ca-0cc229ab826b\build3.exe
"C:\Users\Admin\AppData\Local\60859b10-f148-4a2b-85ca-0cc229ab826b\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"
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 |
| IE | 40.126.31.67:443 | 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 |
| MX | 187.170.238.164:80 | uaery.top | tcp |
| MX | 189.143.218.79:80 | bihsy.com | tcp |
| MX | 189.143.218.79:80 | 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 |
| RO | 86.122.83.142:80 | bihsy.com | tcp |
| RO | 86.122.83.142:80 | bihsy.com | tcp |
| US | 72.21.81.240:80 | tcp | |
| US | 72.21.81.240:80 | tcp | |
| NL | 104.80.225.205:443 | tcp | |
| IE | 20.50.73.10:443 | tcp | |
| NL | 96.16.53.137:80 | tcp | |
| NL | 96.16.53.137:80 | tcp | |
| NL | 96.16.53.137:80 | tcp |
Files
memory/1132-132-0x0000000000000000-mapping.dmp
memory/1132-133-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1132-134-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3476-135-0x00000000023CA000-0x000000000245C000-memory.dmp
memory/1132-137-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3476-136-0x0000000002500000-0x000000000261B000-memory.dmp
memory/1132-138-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4660-139-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\4179b820-ea48-4dff-85ac-6da6dd60ef61\7f39f388bfa890f7ffcd9da2153e4be453edf535728e8158226e0942ead90f08.exe
| MD5 | d8c4af7bb5feae20cf76ce99ab774f6d |
| SHA1 | fa83e038aade648156795b033cd7106c123775f6 |
| SHA256 | 7f39f388bfa890f7ffcd9da2153e4be453edf535728e8158226e0942ead90f08 |
| SHA512 | e7eac87f5da41575530b974d74bb6fbf50b1deb1cec6c929f6c5778dca66c530f2d93d27357469ef9984a893e687fc2454ea1134b10000717f4ace2a032b57d0 |
memory/4956-141-0x0000000000000000-mapping.dmp
memory/1132-142-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4308-143-0x0000000000000000-mapping.dmp
memory/4956-146-0x0000000002409000-0x000000000249B000-memory.dmp
memory/4308-147-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4308-145-0x0000000000400000-0x0000000000537000-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 | 15a5e4b6b9bbee9134f6003cd662c5a7 |
| SHA1 | 7ff5ce6702e578ba89645348a424ec062e7f3a1c |
| SHA256 | c7a6b84f702a210a4e2a18d24226f479c6218db4c2872cca4a5c6b22704b8b7c |
| SHA512 | 19f76cccce24988bd7ab859777485e2b8fa5b00bb48aab0780302cb07f65cff1e3ee0f866fe08ccec85872e9cbecda157e4135681d4f60be3c76e497ef539677 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | 0deaa9105b83b0ddf228d13eb05464a3 |
| SHA1 | c928dc24880c313c6629dd0fff759dacdb1a0b9d |
| SHA256 | d61462da035c25397702fb6d0062dbb3b9a81f13eaff2656fa7a6c8f7e5123aa |
| SHA512 | 209c53dc97aaa23d5c7cc7d4e90f4456dcd51076d43808cf51121b74c519d37d37a1c81ffe83e897344b79bf793b012d292d9dd39c6fd0f190c5c9cdbf3ea722 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | e825419f5d91cbb7dd2c1407c2ae4c08 |
| SHA1 | daca95b9bffaff1aacb09d09292a41c5e98f0d12 |
| SHA256 | 01a7d3b0ef49c660185536f53cfa2744c7784aef0981df4fd03ae06770b25376 |
| SHA512 | e4c0b3dea86821de18a10f43dac1263cf917075b620cd4f6ca22331dec27ca0c89b57145e33de8f502e09c1bcfaa400d27cb601f315b1a8b4c851f15064fd514 |
memory/4308-152-0x0000000000400000-0x0000000000537000-memory.dmp
memory/428-153-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\60859b10-f148-4a2b-85ca-0cc229ab826b\build2.exe
| MD5 | 4c9fdfbf316f37dbcc7314e5641f9a9a |
| SHA1 | 7fa01df0e5420f9e5b69486550460e839fd0f3a3 |
| SHA256 | e661e53f429cd22e30ca6fb368f3e011e76264892f4e718c75cb3636f4f2e611 |
| SHA512 | b22c60d27ed5457677645a2b8669cd1958cc18a021e19dcf1d1a3a88ed63cd4eb749b1fe8798f651dcc5595d019ceb3cb38eae7a07ab73098eee502dbee5c32b |
C:\Users\Admin\AppData\Local\60859b10-f148-4a2b-85ca-0cc229ab826b\build2.exe
| MD5 | 4c9fdfbf316f37dbcc7314e5641f9a9a |
| SHA1 | 7fa01df0e5420f9e5b69486550460e839fd0f3a3 |
| SHA256 | e661e53f429cd22e30ca6fb368f3e011e76264892f4e718c75cb3636f4f2e611 |
| SHA512 | b22c60d27ed5457677645a2b8669cd1958cc18a021e19dcf1d1a3a88ed63cd4eb749b1fe8798f651dcc5595d019ceb3cb38eae7a07ab73098eee502dbee5c32b |
memory/380-156-0x0000000000000000-mapping.dmp
memory/380-157-0x0000000000400000-0x0000000000472000-memory.dmp
memory/380-159-0x0000000000400000-0x0000000000472000-memory.dmp
C:\Users\Admin\AppData\Local\60859b10-f148-4a2b-85ca-0cc229ab826b\build2.exe
| MD5 | 4c9fdfbf316f37dbcc7314e5641f9a9a |
| SHA1 | 7fa01df0e5420f9e5b69486550460e839fd0f3a3 |
| SHA256 | e661e53f429cd22e30ca6fb368f3e011e76264892f4e718c75cb3636f4f2e611 |
| SHA512 | b22c60d27ed5457677645a2b8669cd1958cc18a021e19dcf1d1a3a88ed63cd4eb749b1fe8798f651dcc5595d019ceb3cb38eae7a07ab73098eee502dbee5c32b |
memory/380-160-0x0000000000400000-0x0000000000472000-memory.dmp
memory/428-161-0x0000000000828000-0x000000000085C000-memory.dmp
memory/428-162-0x0000000000730000-0x000000000078E000-memory.dmp
memory/380-163-0x0000000000400000-0x0000000000472000-memory.dmp
memory/380-164-0x0000000050BD0000-0x0000000050CC3000-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 |
C:\ProgramData\mozglue.dll
| MD5 | c8fd9be83bc728cc04beffafc2907fe9 |
| SHA1 | 95ab9f701e0024cedfbd312bcfe4e726744c4f2e |
| SHA256 | ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a |
| SHA512 | fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040 |
memory/2176-185-0x0000000000000000-mapping.dmp
memory/380-186-0x0000000000400000-0x0000000000472000-memory.dmp
memory/220-187-0x0000000000000000-mapping.dmp
memory/2536-188-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\60859b10-f148-4a2b-85ca-0cc229ab826b\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\60859b10-f148-4a2b-85ca-0cc229ab826b\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/4884-191-0x0000000000000000-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/5044-194-0x0000000000000000-mapping.dmp