Analysis Overview
SHA256
d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a
Threat Level: Known bad
The file d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a was found to be: Known bad.
Malicious Activity Summary
Djvu Ransomware
Detected Djvu ransomware
Checks computer location settings
Modifies file permissions
Looks up external IP address via web service
Adds Run key to start application
Suspicious use of SetThreadContext
Unsigned PE
Program crash
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-08-18 11:28
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-08-18 11:28
Reported
2024-08-18 11:31
Platform
win10v2004-20240802-en
Max time kernel
93s
Max time network
127s
Command Line
Signatures
Detected Djvu ransomware
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Djvu Ransomware
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe | N/A |
Modifies file permissions
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\icacls.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\8f042b53-4aae-4052-badc-4a68bf514295\\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe | N/A |
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 4904 set thread context of 4924 | N/A | C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe | C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe |
| PID 756 set thread context of 5000 | N/A | C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe | C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe |
Enumerates physical storage devices
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe |
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\icacls.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe
"C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe"
C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe
"C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\8f042b53-4aae-4052-badc-4a68bf514295" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe
"C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe
"C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe" --Admin IsNotAutoStart IsNotTask
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 5000 -ip 5000
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 5000 -s 572
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 13.86.106.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.237:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 133.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 237.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.214.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | api.2ip.ua | udp |
| US | 104.21.65.24:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | c.pki.goog | udp |
| US | 8.8.8.8:53 | 24.65.21.104.in-addr.arpa | udp |
| FR | 216.58.214.67:80 | c.pki.goog | tcp |
| US | 8.8.8.8:53 | 67.214.58.216.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 192.142.123.92.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | 10.28.171.150.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 196.249.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 81.144.22.2.in-addr.arpa | udp |
| US | 52.111.227.13:443 | tcp | |
| US | 8.8.8.8:53 | 31.243.111.52.in-addr.arpa | udp |
Files
memory/4904-1-0x0000000002130000-0x00000000021D1000-memory.dmp
memory/4904-2-0x00000000021E0000-0x00000000022FB000-memory.dmp
memory/4924-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4924-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4924-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4924-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\8f042b53-4aae-4052-badc-4a68bf514295\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe
| MD5 | 006edf0ac466164ddc9e0ac56474fe0a |
| SHA1 | ee9f512713af63759f11279090d2c8004762735b |
| SHA256 | d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a |
| SHA512 | 43305369fea2dad52d51bc9d5947a2f7e78d33baadd07093c250b9eb1fd3762c511033bbfae2b8d6eb52254306d137e29cd15e0b30b0f6d44a9d4f3d12b8b808 |
memory/4924-19-0x0000000000400000-0x0000000000537000-memory.dmp
memory/756-21-0x0000000000400000-0x00000000004D3000-memory.dmp
memory/756-27-0x0000000000400000-0x00000000004D3000-memory.dmp
memory/5000-26-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5000-24-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5000-23-0x0000000000400000-0x0000000000537000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-08-18 11:28
Reported
2024-08-18 11:31
Platform
win11-20240802-en
Max time kernel
146s
Max time network
152s
Command Line
Signatures
Detected Djvu ransomware
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Djvu Ransomware
Modifies file permissions
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\icacls.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-970747758-134341002-3585657277-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\1d160eb1-5e19-4535-bbb5-e5838eb6fa6f\\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe | N/A |
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 4976 set thread context of 2468 | N/A | C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe | C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe |
| PID 4672 set thread context of 3552 | N/A | C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe | C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe |
Enumerates physical storage devices
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe |
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\icacls.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe
"C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe"
C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe
"C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\1d160eb1-5e19-4535-bbb5-e5838eb6fa6f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe
"C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe
"C:\Users\Admin\AppData\Local\Temp\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe" --Admin IsNotAutoStart IsNotTask
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3552 -ip 3552
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3552 -s 604
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | api.2ip.ua | udp |
| US | 172.67.139.220:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | 220.139.67.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | c.pki.goog | udp |
| FR | 216.58.214.67:80 | c.pki.goog | tcp |
| US | 8.8.8.8:53 | 73.144.22.2.in-addr.arpa | udp |
Files
memory/4976-1-0x0000000002340000-0x00000000023DD000-memory.dmp
memory/4976-2-0x00000000024F0000-0x000000000260B000-memory.dmp
memory/2468-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2468-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2468-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2468-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\1d160eb1-5e19-4535-bbb5-e5838eb6fa6f\d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a.exe
| MD5 | 006edf0ac466164ddc9e0ac56474fe0a |
| SHA1 | ee9f512713af63759f11279090d2c8004762735b |
| SHA256 | d343ea857cdf97aa0ccfd14970425c6888bd216d36ad7f6255a044bed36a4b2a |
| SHA512 | 43305369fea2dad52d51bc9d5947a2f7e78d33baadd07093c250b9eb1fd3762c511033bbfae2b8d6eb52254306d137e29cd15e0b30b0f6d44a9d4f3d12b8b808 |
memory/2468-21-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4672-23-0x0000000000400000-0x00000000004D3000-memory.dmp
memory/3552-25-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3552-28-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4672-29-0x0000000000400000-0x00000000004D3000-memory.dmp
memory/3552-26-0x0000000000400000-0x0000000000537000-memory.dmp