Analysis Overview
SHA256
4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82
Threat Level: Known bad
The file 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82 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
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-05-22 20:08
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-05-22 20:08
Reported
2024-05-22 20:11
Platform
win10v2004-20240226-en
Max time kernel
145s
Max time network
152s
Command Line
Signatures
Detected Djvu ransomware
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
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Djvu Ransomware
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.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-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\9be106ad-a5d7-4952-900d-ac74f6c02cbf\\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.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 2260 set thread context of 4152 | N/A | C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe | C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe |
| PID 2016 set thread context of 5404 | N/A | C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe | C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
"C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe"
C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
"C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\9be106ad-a5d7-4952-900d-ac74f6c02cbf" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
"C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
"C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe" --Admin IsNotAutoStart IsNotTask
C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1324 --field-trial-handle=2280,i,1836084024518340990,18250262151825427757,262144 --variations-seed-version /prefetch:8
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 | 104.219.191.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 100.58.20.217.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 67.169.217.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 140.32.126.40.in-addr.arpa | udp |
| US | 172.67.139.220:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | sdfjhuz.com | udp |
| US | 8.8.8.8:53 | cajgtus.com | udp |
| CO | 181.52.122.51:80 | cajgtus.com | tcp |
| UY | 179.27.75.59:80 | sdfjhuz.com | tcp |
| CO | 181.52.122.51:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 51.122.52.181.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 59.75.27.179.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 58.55.71.13.in-addr.arpa | udp |
| CO | 181.52.122.51:80 | cajgtus.com | tcp |
| CO | 181.52.122.51:80 | cajgtus.com | tcp |
| GB | 142.250.187.202:443 | tcp | |
| US | 8.8.8.8:53 | 28.118.140.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| CO | 181.52.122.51:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 196.249.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 21.236.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 23.173.189.20.in-addr.arpa | udp |
Files
memory/2260-1-0x0000000004A70000-0x0000000004B0A000-memory.dmp
memory/2260-2-0x0000000004B10000-0x0000000004C2B000-memory.dmp
memory/4152-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4152-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4152-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4152-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\9be106ad-a5d7-4952-900d-ac74f6c02cbf\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
| MD5 | fda708b84341e23d935dbbd3328d324b |
| SHA1 | 9ba9f633af7afe8b69f81c50beb2dda944938304 |
| SHA256 | 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82 |
| SHA512 | 345d7bfaa645b4bdc91b69cf4f1d5a1c3cbc64cd48e3db1e2a90c6a7074893e6951e13623094fe12b79cd1dcd8d2ba7dfd83c76d31f61fe4c642520b254c6a56 |
memory/4152-19-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5404-22-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5404-24-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 6728aea2631b86a76c237508d8ba9b55 |
| SHA1 | 7a670f95cac088313f7558869162fe01c6dc0ec9 |
| SHA256 | e1dd7380c6df33cd5702b032e0e359029d3ef7630f06ceb42cfdc154fd0baf7b |
| SHA512 | 533080cd1ec40b8530cad5c9914e0a5156d225f7392283ed2607eda4f1db4a6930002274060ed9130a6f634222c2e15818e16a50579cfe7f5274d028d31212f5 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 4adbbd5b0ba6f8029efe0e89374c4042 |
| SHA1 | 01fa3ffdb795257863cf85367c2be220f3935e92 |
| SHA256 | 782ba656165e436506b2b7bc9a48bec132b4707a6b16d8e1dd69628670caaa83 |
| SHA512 | 6c8a0696fcef4ec64d99ce2a0cc752832e3101743e1a6ac8914e25ebac06b51dd3f08158963f17bb7eb68820e574ee9a6bb0ac456ef736ceaaf4a50f816a293d |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
| MD5 | 78f37a88570fee69422284cfe2b6647d |
| SHA1 | 35fd4afd34757fbfdc467e36e98aad4f55727316 |
| SHA256 | bf5e8cb8a9af124b81b08dcd34e2e3b141a272531b9e6d5ecc3ff023b25e9820 |
| SHA512 | 3801e7eaf4bd6e76258d5fa2dcdd588a4494e796b719b5b07604e81f1bc5276180a3a02333bd91ef379c41d9034958d81134dd485cb56715824788e21e1d6135 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
| MD5 | 8202a1cd02e7d69597995cabbe881a12 |
| SHA1 | 8858d9d934b7aa9330ee73de6c476acf19929ff6 |
| SHA256 | 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5 |
| SHA512 | 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9 |
memory/5404-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5404-30-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5404-31-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5404-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5404-37-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5404-36-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5404-38-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5404-39-0x0000000000400000-0x0000000000537000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-05-22 20:08
Reported
2024-05-22 20:11
Platform
win11-20240426-en
Max time kernel
146s
Max time network
153s
Command Line
Signatures
Detected Djvu ransomware
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
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| 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-1-5-21-2994005945-4089876968-1367784197-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f0d6b676-6b68-4c8a-9960-4d7a6e36e7ba\\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.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 3144 set thread context of 2744 | N/A | C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe | C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe |
| PID 3036 set thread context of 2372 | N/A | C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe | C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
"C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe"
C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
"C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\f0d6b676-6b68-4c8a-9960-4d7a6e36e7ba" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
"C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
"C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe" --Admin IsNotAutoStart IsNotTask
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 | 172.67.139.220:443 | api.2ip.ua | tcp |
| SA | 94.98.224.40:80 | cajgtus.com | tcp |
| BG | 130.204.29.121:80 | sdfjhuz.com | tcp |
| SA | 94.98.224.40:80 | cajgtus.com | tcp |
| SA | 94.98.224.40:80 | cajgtus.com | tcp |
| SA | 94.98.224.40:80 | cajgtus.com | tcp |
| SA | 94.98.224.40:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 131.83.221.88.in-addr.arpa | udp |
| US | 52.111.229.43:443 | tcp |
Files
memory/3144-1-0x0000000004A20000-0x0000000004AC2000-memory.dmp
memory/3144-2-0x0000000004AD0000-0x0000000004BEB000-memory.dmp
memory/2744-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2744-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2744-6-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2744-5-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\f0d6b676-6b68-4c8a-9960-4d7a6e36e7ba\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
| MD5 | fda708b84341e23d935dbbd3328d324b |
| SHA1 | 9ba9f633af7afe8b69f81c50beb2dda944938304 |
| SHA256 | 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82 |
| SHA512 | 345d7bfaa645b4bdc91b69cf4f1d5a1c3cbc64cd48e3db1e2a90c6a7074893e6951e13623094fe12b79cd1dcd8d2ba7dfd83c76d31f61fe4c642520b254c6a56 |
memory/2744-19-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2372-22-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 6728aea2631b86a76c237508d8ba9b55 |
| SHA1 | 7a670f95cac088313f7558869162fe01c6dc0ec9 |
| SHA256 | e1dd7380c6df33cd5702b032e0e359029d3ef7630f06ceb42cfdc154fd0baf7b |
| SHA512 | 533080cd1ec40b8530cad5c9914e0a5156d225f7392283ed2607eda4f1db4a6930002274060ed9130a6f634222c2e15818e16a50579cfe7f5274d028d31212f5 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 437b9eba01c7013bf33af0a881a5aa73 |
| SHA1 | 8d793e3247528b9c428082ee1a590056c2c21895 |
| SHA256 | 0a27cd4217dfc53df82625b39ca2bdacb071cef39cffba4a1eecc1f7dd82b52b |
| SHA512 | 05913c0f164087cbf68210228cbce85e24918144aee960b723065231ebdfcd3415ce46ceacefaa8c9d6b278984be84a4369fae6f03da8040293d6f5f3a4fa336 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
| MD5 | 8202a1cd02e7d69597995cabbe881a12 |
| SHA1 | 8858d9d934b7aa9330ee73de6c476acf19929ff6 |
| SHA256 | 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5 |
| SHA512 | 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
| MD5 | 1cef8b4012142aecbe8f055f8152d4d5 |
| SHA1 | 3fcb8b08b418d66aa57ec33a1a56f3af714bc2d1 |
| SHA256 | 4af6371ef0c5f77e8ca4a679efdded68a3116d2c69c42873a3b23dab93793566 |
| SHA512 | ef7dba8abf59d24d4fbbd496ebbf564312758f7b25614bda42561a92f254517d10c5808340d12e40aab71084661f1782200f4185f64016db011b5538d98e72ec |
memory/2372-27-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2372-28-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2372-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2372-32-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2372-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2372-35-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2372-36-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2372-37-0x0000000000400000-0x0000000000537000-memory.dmp