Analysis Overview
SHA256
856fed29facb17f62dd6449b1cfabe65de2b8cb478e52417e7c0069bde7db864
Threat Level: Known bad
The file 5c171af1b9174fd62c8a9e3f2de9df00N.exe was found to be: Known bad.
Malicious Activity Summary
Detected Djvu ransomware
Djvu Ransomware
Modifies file permissions
Checks computer location settings
Adds Run key to start application
Looks up external IP address via web service
Suspicious use of SetThreadContext
Enumerates physical storage devices
Unsigned PE
Program crash
System Location Discovery: System Language Discovery
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-07-26 02:44
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-07-26 02:44
Reported
2024-07-26 02:47
Platform
win7-20240704-en
Max time kernel
117s
Max time network
126s
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 |
| 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-1-5-21-3294248377-1418901787-4083263181-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e0ead216-7265-4efb-8d99-2d7e775a9999\\5c171af1b9174fd62c8a9e3f2de9df00N.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.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 |
| N/A | api.2ip.ua | N/A | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2956 set thread context of 2100 | N/A | C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe | C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe |
| PID 2820 set thread context of 1700 | N/A | C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe | C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe |
Enumerates physical storage devices
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| 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\5c171af1b9174fd62c8a9e3f2de9df00N.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe
"C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe"
C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe
"C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\e0ead216-7265-4efb-8d99-2d7e775a9999" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe
"C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe
"C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe" --Admin IsNotAutoStart IsNotTask
Network
| Country | Destination | Domain | Proto |
| 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 |
| GB | 172.217.169.3:80 | c.pki.goog | tcp |
| US | 104.21.65.24:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | cajgtus.com | udp |
| KR | 220.125.3.190:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | crl.microsoft.com | udp |
| GB | 2.18.190.71:80 | crl.microsoft.com | tcp |
Files
memory/2956-0-0x0000000000300000-0x0000000000392000-memory.dmp
memory/2100-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2100-8-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2956-7-0x0000000000300000-0x0000000000392000-memory.dmp
memory/2956-5-0x0000000001EB0000-0x0000000001FCB000-memory.dmp
memory/2100-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2956-1-0x0000000000300000-0x0000000000392000-memory.dmp
memory/2100-9-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\e0ead216-7265-4efb-8d99-2d7e775a9999\5c171af1b9174fd62c8a9e3f2de9df00N.exe
| MD5 | 5c171af1b9174fd62c8a9e3f2de9df00 |
| SHA1 | 88586368c833ce427e3e28af0a7bd5a18b0add4c |
| SHA256 | 856fed29facb17f62dd6449b1cfabe65de2b8cb478e52417e7c0069bde7db864 |
| SHA512 | 5675000af023d8c2f1c4c9091f4356178ec2c8975f66ad259483ea02c9bf458280449143d64ad13ec2b65f81380da80eb7a835546752fbbfa1c917f5553f4af1 |
memory/2100-27-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2820-28-0x00000000002E0000-0x0000000000372000-memory.dmp
memory/1700-35-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2820-34-0x0000000000400000-0x00000000004DE000-memory.dmp
memory/1700-33-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8
| MD5 | 971c514f84bba0785f80aa1c23edfd79 |
| SHA1 | 732acea710a87530c6b08ecdf32a110d254a54c8 |
| SHA256 | f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895 |
| SHA512 | 43dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8
| MD5 | 6611da73fe0e90472626e64ea6d1e2ea |
| SHA1 | e8f7c22538820986e1ce1225ee49359bfed76f92 |
| SHA256 | 7274bde6f6f0cd149dbe90c8b7444c10182c08b97b752cceb0a2e582885ac6ca |
| SHA512 | 487d2d4547f63b2e4d555b99bf65f0ddb0a905b0e742273c73c830fe7f1547953c4ae0039aedba533ec9920f8a8bfcc3c6761cfc66afa4f5502042118417f625 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12
| MD5 | 7fb5fa1534dcf77f2125b2403b30a0ee |
| SHA1 | 365d96812a69ac0a4611ea4b70a3f306576cc3ea |
| SHA256 | 33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f |
| SHA512 | a9279fd60505a1bfeef6fb07834cad0fd5be02fd405573fc1a5f59b991e9f88f5e81c32fe910f69bdc6585e71f02559895149eaf49c25b8ff955459fd60c0d2e |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12
| MD5 | e794408964a3e46f759b23cca18091bf |
| SHA1 | 772ccf3fdde3d9cd4cd6b7226604a7051243b518 |
| SHA256 | 996ed73d951680c1b9e86536ed26e55016ea09c9a765b8eaf9e7553fa399c51a |
| SHA512 | 574da2473316481f8d279be36f9e6f1199546c741ff8d5247d9d250c2d32d9f35df109abfc18cbf6031991749c30443cdb62e62c523229447adbf5ac3680875f |
C:\Users\Admin\AppData\Local\Temp\Cab906.tmp
| MD5 | 49aebf8cbd62d92ac215b2923fb1b9f5 |
| SHA1 | 1723be06719828dda65ad804298d0431f6aff976 |
| SHA256 | b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f |
| SHA512 | bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b |
memory/1700-49-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1700-48-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1700-47-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1700-53-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1700-55-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1700-56-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1700-57-0x0000000000400000-0x0000000000537000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-07-26 02:44
Reported
2024-07-26 02:47
Platform
win10v2004-20240709-en
Max time kernel
106s
Max time network
112s
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-1-5-21-1705699165-553239100-4129523827-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.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-1-5-21-1705699165-553239100-4129523827-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\32a17bb1-8f22-430d-8bcc-e4ec3958227a\\5c171af1b9174fd62c8a9e3f2de9df00N.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.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 2376 set thread context of 1328 | N/A | C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe | C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe |
| PID 2496 set thread context of 2964 | N/A | C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe | C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.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\5c171af1b9174fd62c8a9e3f2de9df00N.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\5c171af1b9174fd62c8a9e3f2de9df00N.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.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\5c171af1b9174fd62c8a9e3f2de9df00N.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe
"C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe"
C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe
"C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\32a17bb1-8f22-430d-8bcc-e4ec3958227a" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe
"C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe
"C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe" --Admin IsNotAutoStart IsNotTask
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2964 -ip 2964
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2964 -s 568
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 217.106.137.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 81.144.22.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 13.107.21.237:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 237.21.107.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 57.169.31.20.in-addr.arpa | udp |
| 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 | c.pki.goog | udp |
| GB | 172.217.169.3:80 | c.pki.goog | tcp |
| US | 8.8.8.8:53 | 220.139.67.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 3.169.217.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 228.249.119.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.165.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.126.166.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 147.142.123.92.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| IE | 52.111.236.21:443 | tcp | |
| US | 8.8.8.8:53 | 22.236.111.52.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 |
Files
memory/2376-1-0x0000000000770000-0x0000000000803000-memory.dmp
memory/2376-2-0x0000000002270000-0x000000000238B000-memory.dmp
memory/1328-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1328-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1328-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1328-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\32a17bb1-8f22-430d-8bcc-e4ec3958227a\5c171af1b9174fd62c8a9e3f2de9df00N.exe
| MD5 | 5c171af1b9174fd62c8a9e3f2de9df00 |
| SHA1 | 88586368c833ce427e3e28af0a7bd5a18b0add4c |
| SHA256 | 856fed29facb17f62dd6449b1cfabe65de2b8cb478e52417e7c0069bde7db864 |
| SHA512 | 5675000af023d8c2f1c4c9091f4356178ec2c8975f66ad259483ea02c9bf458280449143d64ad13ec2b65f81380da80eb7a835546752fbbfa1c917f5553f4af1 |
memory/1328-17-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2964-21-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2964-25-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2964-23-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2496-22-0x0000000000400000-0x00000000004DE000-memory.dmp
memory/2496-20-0x0000000000400000-0x00000000004DE000-memory.dmp