Analysis Overview
SHA256
f82516c78483b315b21307bcbecd66273dfa1963f3ffa9d2609df6341e00a95e
Threat Level: Known bad
The file 70bdc622d4ecb4da6eb1d3a5f98652ab was found to be: Known bad.
Malicious Activity Summary
SystemBC
Executes dropped EXE
Loads dropped DLL
Uses Tor communications
Looks up external IP address via web service
Suspicious use of SetThreadContext
Drops file in System32 directory
Drops file in Windows directory
Program crash
Unsigned PE
Enumerates physical storage devices
NSIS installer
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2023-12-19 18:00
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
NSIS installer
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2023-12-19 18:00
Reported
2023-12-20 00:16
Platform
win7-20231215-en
Max time kernel
169s
Max time network
185s
Command Line
Signatures
SystemBC
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\ProgramData\hrsrvt\csxao.exe | N/A |
| N/A | N/A | C:\ProgramData\hrsrvt\csxao.exe | N/A |
| N/A | N/A | C:\ProgramData\hrsrvt\csxao.exe | N/A |
| N/A | N/A | C:\ProgramData\hrsrvt\csxao.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\70bdc622d4ecb4da6eb1d3a5f98652ab.exe | N/A |
| N/A | N/A | C:\ProgramData\hrsrvt\csxao.exe | N/A |
| N/A | N/A | C:\ProgramData\hrsrvt\csxao.exe | N/A |
| N/A | N/A | C:\ProgramData\hrsrvt\csxao.exe | N/A |
| N/A | N/A | C:\ProgramData\hrsrvt\csxao.exe | N/A |
Looks up external IP address via web service
| Description | Indicator | Process | Target |
| N/A | ip4.seeip.org | N/A | N/A |
| N/A | ip4.seeip.org | N/A | N/A |
| N/A | api.ipify.org | N/A | N/A |
| N/A | api.ipify.org | N/A | N/A |
Uses Tor communications
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\523724207 | C:\ProgramData\hrsrvt\csxao.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\523724207 | C:\ProgramData\hrsrvt\csxao.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2680 set thread context of 2728 | N/A | C:\Users\Admin\AppData\Local\Temp\70bdc622d4ecb4da6eb1d3a5f98652ab.exe | C:\Users\Admin\AppData\Local\Temp\70bdc622d4ecb4da6eb1d3a5f98652ab.exe |
| PID 364 set thread context of 1840 | N/A | C:\ProgramData\hrsrvt\csxao.exe | C:\ProgramData\hrsrvt\csxao.exe |
| PID 876 set thread context of 576 | N/A | C:\ProgramData\hrsrvt\csxao.exe | C:\ProgramData\hrsrvt\csxao.exe |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\Tasks\csxao.job | C:\Users\Admin\AppData\Local\Temp\70bdc622d4ecb4da6eb1d3a5f98652ab.exe | N/A |
| File created | C:\Windows\Tasks\csxao.job | C:\Users\Admin\AppData\Local\Temp\70bdc622d4ecb4da6eb1d3a5f98652ab.exe | N/A |
Enumerates physical storage devices
NSIS installer
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\70bdc622d4ecb4da6eb1d3a5f98652ab.exe | N/A |
Suspicious behavior: MapViewOfSection
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\70bdc622d4ecb4da6eb1d3a5f98652ab.exe | N/A |
| N/A | N/A | C:\ProgramData\hrsrvt\csxao.exe | N/A |
| N/A | N/A | C:\ProgramData\hrsrvt\csxao.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\70bdc622d4ecb4da6eb1d3a5f98652ab.exe
"C:\Users\Admin\AppData\Local\Temp\70bdc622d4ecb4da6eb1d3a5f98652ab.exe"
C:\Users\Admin\AppData\Local\Temp\70bdc622d4ecb4da6eb1d3a5f98652ab.exe
"C:\Users\Admin\AppData\Local\Temp\70bdc622d4ecb4da6eb1d3a5f98652ab.exe"
C:\Windows\system32\taskeng.exe
taskeng.exe {789E334C-9763-41FC-8160-C5ABD4A36664} S-1-5-18:NT AUTHORITY\System:Service:
C:\ProgramData\hrsrvt\csxao.exe
C:\ProgramData\hrsrvt\csxao.exe start
C:\ProgramData\hrsrvt\csxao.exe
C:\ProgramData\hrsrvt\csxao.exe start
C:\ProgramData\hrsrvt\csxao.exe
C:\ProgramData\hrsrvt\csxao.exe start
C:\ProgramData\hrsrvt\csxao.exe
C:\ProgramData\hrsrvt\csxao.exe start
Network
| Country | Destination | Domain | Proto |
| GB | 80.85.84.79:4001 | tcp | |
| GB | 80.85.84.79:4001 | tcp | |
| US | 8.8.8.8:53 | api.ipify.org | udp |
| US | 64.185.227.156:443 | api.ipify.org | tcp |
| US | 8.8.8.8:53 | ip4.seeip.org | udp |
| US | 23.128.64.141:443 | ip4.seeip.org | tcp |
| NL | 194.109.206.212:80 | tcp | |
| SE | 171.25.193.9:443 | 171.25.193.9 | tcp |
| DE | 79.250.75.98:443 | tcp | |
| DE | 85.215.236.196:443 | tcp | |
| IN | 40.81.240.4:443 | tcp | |
| HR | 45.95.169.117:27111 | tcp | |
| DE | 193.23.244.244:80 | 193.23.244.244 | tcp |
| DE | 178.63.19.126:9001 | tcp | |
| DE | 158.101.163.78:445 | tcp | |
| US | 147.135.110.109:443 | tcp | |
| HK | 91.245.255.87:9001 | tcp | |
| US | 165.227.180.118:9001 | tcp | |
| PL | 178.19.96.125:27941 | tcp | |
| PL | 151.115.51.229:443 | tcp | |
| PL | 45.138.16.147:110 | tcp | |
| DE | 193.31.27.109:9001 | tcp | |
| DE | 139.59.148.178:9001 | tcp | |
| DE | 193.23.244.244:80 | 193.23.244.244 | tcp |
| MD | 5.181.158.12:9054 | tcp |
Files
\Users\Admin\AppData\Local\Temp\nsoB137.tmp\System.dll
| MD5 | fccff8cb7a1067e23fd2e2b63971a8e1 |
| SHA1 | 30e2a9e137c1223a78a0f7b0bf96a1c361976d91 |
| SHA256 | 6fcea34c8666b06368379c6c402b5321202c11b00889401c743fb96c516c679e |
| SHA512 | f4335e84e6f8d70e462a22f1c93d2998673a7616c868177cac3e8784a3be1d7d0bb96f2583fa0ed82f4f2b6b8f5d9b33521c279a42e055d80a94b4f3f1791e0c |
memory/2728-7-0x0000000000400000-0x000000000040B000-memory.dmp
memory/2728-9-0x0000000000400000-0x000000000040B000-memory.dmp
memory/2728-11-0x0000000000400000-0x000000000040B000-memory.dmp
C:\ProgramData\hrsrvt\csxao.exe
| MD5 | 70bdc622d4ecb4da6eb1d3a5f98652ab |
| SHA1 | 6be9177289178f1799ca1241a35e94d24089148e |
| SHA256 | f82516c78483b315b21307bcbecd66273dfa1963f3ffa9d2609df6341e00a95e |
| SHA512 | f04a3df175241f72c85c6eb4e447aebb8f8832d09327c9f80a661e318cb265bc7b7a0490575f9c80e3142e493fc95588d7cca4e4c230ce09b93ab535a6e66c39 |
C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\523724207
| MD5 | e2bcf3f4d1bf5cd55b8e2bcdea1bd3c5 |
| SHA1 | e80cdb0628b45ccdd2cab2055d740f24116d89c0 |
| SHA256 | 636ea92e088c0deae15b2d6b60d5220882e6c6a758028686f65a285ee87b4a9c |
| SHA512 | 41cb08ad69b0628bd853407fd28a1c612cfe06245f799dd9f01486500abe625c3e872c0a70e666b487e7b7e3556650c5e2e873f1d56dc5d2d893aed4f1d794f0 |
Analysis: behavioral2
Detonation Overview
Submitted
2023-12-19 18:00
Reported
2023-12-20 00:16
Platform
win10v2004-20231215-en
Max time kernel
91s
Max time network
125s
Command Line
Signatures
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\70bdc622d4ecb4da6eb1d3a5f98652ab.exe | N/A |
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\70bdc622d4ecb4da6eb1d3a5f98652ab.exe |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2776 wrote to memory of 4820 | N/A | C:\Users\Admin\AppData\Local\Temp\70bdc622d4ecb4da6eb1d3a5f98652ab.exe | C:\Users\Admin\AppData\Local\Temp\70bdc622d4ecb4da6eb1d3a5f98652ab.exe |
| PID 2776 wrote to memory of 4820 | N/A | C:\Users\Admin\AppData\Local\Temp\70bdc622d4ecb4da6eb1d3a5f98652ab.exe | C:\Users\Admin\AppData\Local\Temp\70bdc622d4ecb4da6eb1d3a5f98652ab.exe |
| PID 2776 wrote to memory of 4820 | N/A | C:\Users\Admin\AppData\Local\Temp\70bdc622d4ecb4da6eb1d3a5f98652ab.exe | C:\Users\Admin\AppData\Local\Temp\70bdc622d4ecb4da6eb1d3a5f98652ab.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\70bdc622d4ecb4da6eb1d3a5f98652ab.exe
"C:\Users\Admin\AppData\Local\Temp\70bdc622d4ecb4da6eb1d3a5f98652ab.exe"
C:\Users\Admin\AppData\Local\Temp\70bdc622d4ecb4da6eb1d3a5f98652ab.exe
"C:\Users\Admin\AppData\Local\Temp\70bdc622d4ecb4da6eb1d3a5f98652ab.exe"
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2776 -ip 2776
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2776 -s 952
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 16.53.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.154.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.204.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.135.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.205.248.87.in-addr.arpa | udp |
Files
C:\Users\Admin\AppData\Local\Temp\nsb4A0A.tmp\System.dll
| MD5 | fccff8cb7a1067e23fd2e2b63971a8e1 |
| SHA1 | 30e2a9e137c1223a78a0f7b0bf96a1c361976d91 |
| SHA256 | 6fcea34c8666b06368379c6c402b5321202c11b00889401c743fb96c516c679e |
| SHA512 | f4335e84e6f8d70e462a22f1c93d2998673a7616c868177cac3e8784a3be1d7d0bb96f2583fa0ed82f4f2b6b8f5d9b33521c279a42e055d80a94b4f3f1791e0c |