Analysis Overview
SHA256
4b822c7879f98db061aa1accc062708a766fa25aa06b2f6513f00df43124d1ea
Threat Level: Known bad
The file 4b822c7879f98db061aa1accc062708a766fa25aa06b2f6513f00df43124d1ea was found to be: Known bad.
Malicious Activity Summary
Vidar
Djvu Ransomware
Detected Djvu ransomware
Downloads MZ/PE file
Modifies file permissions
Executes dropped EXE
Reads user/profile data of web browsers
Loads dropped DLL
Looks up external IP address via web service
Accesses 2FA software files, possible credential harvesting
Checks installed software on the system
Accesses cryptocurrency files/wallets, possible credential harvesting
Adds Run key to start application
Suspicious use of SetThreadContext
Enumerates physical storage devices
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Checks processor information in registry
Suspicious use of WriteProcessMemory
Delays execution with timeout.exe
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2023-02-17 00:45
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2023-02-17 00:45
Reported
2023-02-17 00:48
Platform
win10-20220812-en
Max time kernel
85s
Max time network
134s
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
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\0bb80c36-6b7f-4ce6-8316-5cba94a3b323\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\0bb80c36-6b7f-4ce6-8316-5cba94a3b323\build3.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\0bb80c36-6b7f-4ce6-8316-5cba94a3b323\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\0bb80c36-6b7f-4ce6-8316-5cba94a3b323\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\0bb80c36-6b7f-4ce6-8316-5cba94a3b323\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-1-5-21-2482096546-1136599444-1359412500-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\4ceca11d-0e4e-4435-9ca2-8d42256b379f\\4b822c7879f98db061aa1accc062708a766fa25aa06b2f6513f00df43124d1ea.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\4b822c7879f98db061aa1accc062708a766fa25aa06b2f6513f00df43124d1ea.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 |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2208 set thread context of 2732 | N/A | C:\Users\Admin\AppData\Local\Temp\4b822c7879f98db061aa1accc062708a766fa25aa06b2f6513f00df43124d1ea.exe | C:\Users\Admin\AppData\Local\Temp\4b822c7879f98db061aa1accc062708a766fa25aa06b2f6513f00df43124d1ea.exe |
| PID 4632 set thread context of 4512 | N/A | C:\Users\Admin\AppData\Local\Temp\4b822c7879f98db061aa1accc062708a766fa25aa06b2f6513f00df43124d1ea.exe | C:\Users\Admin\AppData\Local\Temp\4b822c7879f98db061aa1accc062708a766fa25aa06b2f6513f00df43124d1ea.exe |
| PID 4872 set thread context of 2172 | N/A | C:\Users\Admin\AppData\Local\0bb80c36-6b7f-4ce6-8316-5cba94a3b323\build2.exe | C:\Users\Admin\AppData\Local\0bb80c36-6b7f-4ce6-8316-5cba94a3b323\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\0bb80c36-6b7f-4ce6-8316-5cba94a3b323\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\0bb80c36-6b7f-4ce6-8316-5cba94a3b323\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\4b822c7879f98db061aa1accc062708a766fa25aa06b2f6513f00df43124d1ea.exe
"C:\Users\Admin\AppData\Local\Temp\4b822c7879f98db061aa1accc062708a766fa25aa06b2f6513f00df43124d1ea.exe"
C:\Users\Admin\AppData\Local\Temp\4b822c7879f98db061aa1accc062708a766fa25aa06b2f6513f00df43124d1ea.exe
"C:\Users\Admin\AppData\Local\Temp\4b822c7879f98db061aa1accc062708a766fa25aa06b2f6513f00df43124d1ea.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\4ceca11d-0e4e-4435-9ca2-8d42256b379f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\4b822c7879f98db061aa1accc062708a766fa25aa06b2f6513f00df43124d1ea.exe
"C:\Users\Admin\AppData\Local\Temp\4b822c7879f98db061aa1accc062708a766fa25aa06b2f6513f00df43124d1ea.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\4b822c7879f98db061aa1accc062708a766fa25aa06b2f6513f00df43124d1ea.exe
"C:\Users\Admin\AppData\Local\Temp\4b822c7879f98db061aa1accc062708a766fa25aa06b2f6513f00df43124d1ea.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\0bb80c36-6b7f-4ce6-8316-5cba94a3b323\build2.exe
"C:\Users\Admin\AppData\Local\0bb80c36-6b7f-4ce6-8316-5cba94a3b323\build2.exe"
C:\Users\Admin\AppData\Local\0bb80c36-6b7f-4ce6-8316-5cba94a3b323\build3.exe
"C:\Users\Admin\AppData\Local\0bb80c36-6b7f-4ce6-8316-5cba94a3b323\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\0bb80c36-6b7f-4ce6-8316-5cba94a3b323\build2.exe
"C:\Users\Admin\AppData\Local\0bb80c36-6b7f-4ce6-8316-5cba94a3b323\build2.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\0bb80c36-6b7f-4ce6-8316-5cba94a3b323\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 | 52.168.112.66:443 | tcp | |
| US | 8.8.8.8:53 | uaery.top | udp |
| US | 8.8.8.8:53 | bihsy.com | udp |
| KR | 211.171.233.129:80 | bihsy.com | tcp |
| MX | 187.212.182.57:80 | bihsy.com | tcp |
| MX | 187.212.182.57:80 | bihsy.com | tcp |
| US | 93.184.221.240:80 | 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 |
Files
memory/2208-120-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-121-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-122-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-123-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-124-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-125-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-126-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-127-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-128-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-129-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-130-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-131-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-132-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-133-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-134-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-135-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-136-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-137-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-138-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-139-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-140-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-141-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-142-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-144-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-145-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-146-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-147-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-148-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-149-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2208-150-0x0000000002370000-0x0000000002406000-memory.dmp
memory/2208-151-0x0000000002410000-0x000000000252B000-memory.dmp
memory/2732-152-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2732-154-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-155-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-156-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-157-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-153-0x0000000000424141-mapping.dmp
memory/2732-158-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-159-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2732-160-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-161-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-162-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-163-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-164-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-165-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-167-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-166-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-168-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-169-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-170-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-171-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-173-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-172-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-174-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-175-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-176-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-177-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-178-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-180-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-179-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-181-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-182-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-183-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-184-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-185-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-186-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-187-0x0000000077540000-0x00000000776CE000-memory.dmp
memory/2732-204-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3332-224-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\4ceca11d-0e4e-4435-9ca2-8d42256b379f\4b822c7879f98db061aa1accc062708a766fa25aa06b2f6513f00df43124d1ea.exe
| MD5 | c76a00fc89645295e3e5e6368b127444 |
| SHA1 | 143395fba1b9fe1e3364f0bf83488104ddf0ddbd |
| SHA256 | 4b822c7879f98db061aa1accc062708a766fa25aa06b2f6513f00df43124d1ea |
| SHA512 | 83a18a528a5af4cd81a2138dba1927188d068705c27b37259489d24b6be8332ba95feb826ff6b73dccf65a29405ee72094d30155fd355723173c3d8df89fd46d |
memory/4632-250-0x0000000000000000-mapping.dmp
memory/2732-252-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4512-281-0x0000000000424141-mapping.dmp
memory/4512-332-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4872-362-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\0bb80c36-6b7f-4ce6-8316-5cba94a3b323\build2.exe
| MD5 | 4c9fdfbf316f37dbcc7314e5641f9a9a |
| SHA1 | 7fa01df0e5420f9e5b69486550460e839fd0f3a3 |
| SHA256 | e661e53f429cd22e30ca6fb368f3e011e76264892f4e718c75cb3636f4f2e611 |
| SHA512 | b22c60d27ed5457677645a2b8669cd1958cc18a021e19dcf1d1a3a88ed63cd4eb749b1fe8798f651dcc5595d019ceb3cb38eae7a07ab73098eee502dbee5c32b |
C:\Users\Admin\AppData\Local\0bb80c36-6b7f-4ce6-8316-5cba94a3b323\build2.exe
| MD5 | 4c9fdfbf316f37dbcc7314e5641f9a9a |
| SHA1 | 7fa01df0e5420f9e5b69486550460e839fd0f3a3 |
| SHA256 | e661e53f429cd22e30ca6fb368f3e011e76264892f4e718c75cb3636f4f2e611 |
| SHA512 | b22c60d27ed5457677645a2b8669cd1958cc18a021e19dcf1d1a3a88ed63cd4eb749b1fe8798f651dcc5595d019ceb3cb38eae7a07ab73098eee502dbee5c32b |
memory/4676-381-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\0bb80c36-6b7f-4ce6-8316-5cba94a3b323\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\0bb80c36-6b7f-4ce6-8316-5cba94a3b323\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/5024-416-0x0000000000000000-mapping.dmp
memory/2172-449-0x0000000000432A3C-mapping.dmp
memory/4872-452-0x00000000021F0000-0x000000000224E000-memory.dmp
C:\Users\Admin\AppData\Local\0bb80c36-6b7f-4ce6-8316-5cba94a3b323\build2.exe
| MD5 | 4c9fdfbf316f37dbcc7314e5641f9a9a |
| SHA1 | 7fa01df0e5420f9e5b69486550460e839fd0f3a3 |
| SHA256 | e661e53f429cd22e30ca6fb368f3e011e76264892f4e718c75cb3636f4f2e611 |
| SHA512 | b22c60d27ed5457677645a2b8669cd1958cc18a021e19dcf1d1a3a88ed63cd4eb749b1fe8798f651dcc5595d019ceb3cb38eae7a07ab73098eee502dbee5c32b |
memory/2172-509-0x0000000000400000-0x0000000000472000-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/4076-567-0x0000000000000000-mapping.dmp
memory/2172-570-0x0000000000400000-0x0000000000472000-memory.dmp
memory/3388-574-0x0000000000000000-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/1284-630-0x0000000000000000-mapping.dmp