Analysis Overview
SHA256
00b7d480ac33740f5235e136a50004b5275ef488dc9c72a530e4df3c7f10e29d
Threat Level: Known bad
The file 00b7d480ac33740f5235e136a50004b5275ef488dc9c72a530e4df3c7f10e29d was found to be: Known bad.
Malicious Activity Summary
Vidar
Djvu Ransomware
Detected Djvu ransomware
Executes dropped EXE
Downloads MZ/PE file
Reads user/profile data of web browsers
Checks computer location settings
Modifies file permissions
Loads dropped DLL
Checks installed software on the system
Accesses cryptocurrency files/wallets, possible credential harvesting
Looks up external IP address via web service
Accesses 2FA software files, possible credential harvesting
Adds Run key to start application
Suspicious use of SetThreadContext
Enumerates physical storage devices
Creates scheduled task(s)
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Kills process with taskkill
Delays execution with timeout.exe
Checks processor information in registry
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-10-19 08:32
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2022-10-19 08:32
Reported
2022-10-19 08:35
Platform
win10v2004-20220901-en
Max time kernel
66s
Max time network
127s
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\a8afca0d-43c5-4ec2-9dff-4cab8eeed3a5\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\a8afca0d-43c5-4ec2-9dff-4cab8eeed3a5\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\a8afca0d-43c5-4ec2-9dff-4cab8eeed3a5\build3.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\00b7d480ac33740f5235e136a50004b5275ef488dc9c72a530e4df3c7f10e29d.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\00b7d480ac33740f5235e136a50004b5275ef488dc9c72a530e4df3c7f10e29d.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\a8afca0d-43c5-4ec2-9dff-4cab8eeed3a5\build2.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\a8afca0d-43c5-4ec2-9dff-4cab8eeed3a5\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\a8afca0d-43c5-4ec2-9dff-4cab8eeed3a5\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-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\b7828932-0900-48a4-8fa2-123c6f21f383\\00b7d480ac33740f5235e136a50004b5275ef488dc9c72a530e4df3c7f10e29d.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\00b7d480ac33740f5235e136a50004b5275ef488dc9c72a530e4df3c7f10e29d.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 2536 set thread context of 4168 | N/A | C:\Users\Admin\AppData\Local\Temp\00b7d480ac33740f5235e136a50004b5275ef488dc9c72a530e4df3c7f10e29d.exe | C:\Users\Admin\AppData\Local\Temp\00b7d480ac33740f5235e136a50004b5275ef488dc9c72a530e4df3c7f10e29d.exe |
| PID 4524 set thread context of 1452 | N/A | C:\Users\Admin\AppData\Local\Temp\00b7d480ac33740f5235e136a50004b5275ef488dc9c72a530e4df3c7f10e29d.exe | C:\Users\Admin\AppData\Local\Temp\00b7d480ac33740f5235e136a50004b5275ef488dc9c72a530e4df3c7f10e29d.exe |
| PID 4764 set thread context of 1944 | N/A | C:\Users\Admin\AppData\Local\a8afca0d-43c5-4ec2-9dff-4cab8eeed3a5\build2.exe | C:\Users\Admin\AppData\Local\a8afca0d-43c5-4ec2-9dff-4cab8eeed3a5\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\a8afca0d-43c5-4ec2-9dff-4cab8eeed3a5\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\a8afca0d-43c5-4ec2-9dff-4cab8eeed3a5\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 |
Kills process with taskkill
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\taskkill.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\taskkill.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\00b7d480ac33740f5235e136a50004b5275ef488dc9c72a530e4df3c7f10e29d.exe
"C:\Users\Admin\AppData\Local\Temp\00b7d480ac33740f5235e136a50004b5275ef488dc9c72a530e4df3c7f10e29d.exe"
C:\Users\Admin\AppData\Local\Temp\00b7d480ac33740f5235e136a50004b5275ef488dc9c72a530e4df3c7f10e29d.exe
"C:\Users\Admin\AppData\Local\Temp\00b7d480ac33740f5235e136a50004b5275ef488dc9c72a530e4df3c7f10e29d.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\b7828932-0900-48a4-8fa2-123c6f21f383" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\00b7d480ac33740f5235e136a50004b5275ef488dc9c72a530e4df3c7f10e29d.exe
"C:\Users\Admin\AppData\Local\Temp\00b7d480ac33740f5235e136a50004b5275ef488dc9c72a530e4df3c7f10e29d.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\00b7d480ac33740f5235e136a50004b5275ef488dc9c72a530e4df3c7f10e29d.exe
"C:\Users\Admin\AppData\Local\Temp\00b7d480ac33740f5235e136a50004b5275ef488dc9c72a530e4df3c7f10e29d.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\a8afca0d-43c5-4ec2-9dff-4cab8eeed3a5\build2.exe
"C:\Users\Admin\AppData\Local\a8afca0d-43c5-4ec2-9dff-4cab8eeed3a5\build2.exe"
C:\Users\Admin\AppData\Local\a8afca0d-43c5-4ec2-9dff-4cab8eeed3a5\build2.exe
"C:\Users\Admin\AppData\Local\a8afca0d-43c5-4ec2-9dff-4cab8eeed3a5\build2.exe"
C:\Users\Admin\AppData\Local\a8afca0d-43c5-4ec2-9dff-4cab8eeed3a5\build3.exe
"C:\Users\Admin\AppData\Local\a8afca0d-43c5-4ec2-9dff-4cab8eeed3a5\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" 116.202.186.42/c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\a8afca0d-43c5-4ec2-9dff-4cab8eeed3a5\build2.exe" & del C:\PrograData\*.dll & exit
C:\Windows\SysWOW64\taskkill.exe
taskkill /im build2.exe /f
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 | rgyui.top | udp |
| PA | 190.122.162.239:80 | rgyui.top | tcp |
| US | 8.8.8.8:53 | winnlinne.com | udp |
| KR | 1.248.122.240:80 | winnlinne.com | tcp |
| KR | 1.248.122.240:80 | winnlinne.com | tcp |
| US | 8.8.8.8:53 | t.me | udp |
| NL | 149.154.167.99:443 | t.me | tcp |
| DE | 116.202.186.42:80 | 116.202.186.42 | tcp |
| US | 209.197.3.8:80 | tcp | |
| FR | 2.18.109.224:443 | tcp | |
| US | 209.197.3.8:80 | tcp | |
| US | 209.197.3.8:80 | tcp |
Files
memory/4168-132-0x0000000000000000-mapping.dmp
memory/4168-134-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2536-135-0x00000000008B6000-0x0000000000948000-memory.dmp
memory/4168-133-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2536-136-0x00000000023D0000-0x00000000024EB000-memory.dmp
memory/4168-137-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4168-138-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2540-139-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\b7828932-0900-48a4-8fa2-123c6f21f383\00b7d480ac33740f5235e136a50004b5275ef488dc9c72a530e4df3c7f10e29d.exe
| MD5 | effc004b6fce37e7b350cb7f61f21730 |
| SHA1 | 116824c5bfc45c8aef655c4a10144d4a117317a6 |
| SHA256 | 00b7d480ac33740f5235e136a50004b5275ef488dc9c72a530e4df3c7f10e29d |
| SHA512 | 954d3152593fe925132eab613f3d0131f20089caa0361d9505f374d07076b39c04f8bc3cb333b02e1ab55c78f4013e3624ff7e3c86b471e506630db517c96b6a |
memory/4524-141-0x0000000000000000-mapping.dmp
memory/4168-142-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1452-143-0x0000000000000000-mapping.dmp
memory/4524-146-0x00000000008B7000-0x0000000000949000-memory.dmp
memory/1452-145-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1452-147-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1452-148-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | 006c98bc42ac1d15f0ec70e3488783c5 |
| SHA1 | a8c8302826468c903b511e206d6d058e2c3acdaa |
| SHA256 | e24883740fbed2781e4df4e5387cd95c3345ec9944edeeb36babd2c10135fa00 |
| SHA512 | e0caea17f99a18483e0195c5311942c195ef42532f1868bfb5c64b3f6cb72cc0fc58414176a9bfc66452e11d17c2058eafb483a41890f502ec76dc3a6807f2f4 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | 1f0ff0c8b63524d12d266e59178a5c40 |
| SHA1 | 204e09eb1381540e8bd84cc916772999027026ad |
| SHA256 | 42f49d1f3f615a36f84869929a13102c946e5a53e97b69dd700e81019242ea49 |
| SHA512 | 8d79acc030dad82dbbadb762b9e47e1917a5234a4a5e9ba48c1c8fe2a69a3e2d0e6ea0c5b06a307790569705309508684468d3ab5c099d80fcd08ac9dba2ac50 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | 97ab7ffd65186e85f453dc7c02637528 |
| SHA1 | f22312a6a44613be85c0370878456a965f869a40 |
| SHA256 | 630df8e970cc3b1ad508db713dd8be52e0ac7a5826f3f264a266232f9a1c23ee |
| SHA512 | 37d90c98e72ad55b2cbb938541c81bac1aa9d2b8a7e19f0fbfaa365b49e7bef2d3199f03e46aa9fbf3055f3701d21860820c451065f7e425d39bf86ca606bfb0 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | 2c43dbcb38bedaec244808211f95a26d |
| SHA1 | 0974398fdcafccbfe93b5e2bd14840725b91c405 |
| SHA256 | 089567525b033e813e24ba8480fe5adff89a94100add1098734ad9405c6b7ede |
| SHA512 | 8948be5d436455e919ae72ad4c5a34c4b40f4481e707df3a18be44bb1d257bcdfb057fcf7fbb45109f0255b3c1355464f5fd7ae064debeacd7c9a6823e743545 |
memory/4764-153-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\a8afca0d-43c5-4ec2-9dff-4cab8eeed3a5\build2.exe
| MD5 | 5fd8c38657bb9393bb4736c880675223 |
| SHA1 | f3a03b2e75cef22262f6677e3832b6ad9327905c |
| SHA256 | 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6 |
| SHA512 | 43c82f6db716792a770a3573a9d20cb69a2421ccc2bb875e57f4270d92c9289ee684deda19e3232c50f4675aaf86de173f73376a00f927a8d9847f60b8b732fe |
C:\Users\Admin\AppData\Local\a8afca0d-43c5-4ec2-9dff-4cab8eeed3a5\build2.exe
| MD5 | 5fd8c38657bb9393bb4736c880675223 |
| SHA1 | f3a03b2e75cef22262f6677e3832b6ad9327905c |
| SHA256 | 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6 |
| SHA512 | 43c82f6db716792a770a3573a9d20cb69a2421ccc2bb875e57f4270d92c9289ee684deda19e3232c50f4675aaf86de173f73376a00f927a8d9847f60b8b732fe |
memory/1944-156-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\a8afca0d-43c5-4ec2-9dff-4cab8eeed3a5\build2.exe
| MD5 | 5fd8c38657bb9393bb4736c880675223 |
| SHA1 | f3a03b2e75cef22262f6677e3832b6ad9327905c |
| SHA256 | 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6 |
| SHA512 | 43c82f6db716792a770a3573a9d20cb69a2421ccc2bb875e57f4270d92c9289ee684deda19e3232c50f4675aaf86de173f73376a00f927a8d9847f60b8b732fe |
memory/1944-157-0x0000000000400000-0x0000000000463000-memory.dmp
memory/4764-159-0x000000000075D000-0x0000000000789000-memory.dmp
memory/1944-162-0x0000000000400000-0x0000000000463000-memory.dmp
memory/4764-161-0x00000000020E0000-0x000000000212F000-memory.dmp
memory/1944-163-0x0000000000400000-0x0000000000463000-memory.dmp
memory/1944-164-0x0000000061E00000-0x0000000061EF3000-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/1200-184-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\a8afca0d-43c5-4ec2-9dff-4cab8eeed3a5\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\a8afca0d-43c5-4ec2-9dff-4cab8eeed3a5\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/2148-187-0x0000000000000000-mapping.dmp
memory/1452-188-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4436-189-0x0000000000000000-mapping.dmp
memory/4708-190-0x0000000000000000-mapping.dmp
memory/1944-191-0x0000000000400000-0x0000000000463000-memory.dmp
memory/528-192-0x0000000000000000-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/1960-195-0x0000000000000000-mapping.dmp