Analysis Overview
SHA256
99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af
Threat Level: Known bad
The file 99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af was found to be: Known bad.
Malicious Activity Summary
UPX dump on OEP (original entry point)
UPX dump on OEP (original entry point)
Executes dropped EXE
Reads user/profile data of web browsers
UPX packed file
Adds Run key to start application
Drops file in Windows directory
Unsigned PE
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-07 23:44
Signatures
UPX dump on OEP (original entry point)
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Unsigned PE
| 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
2024-04-07 23:44
Reported
2024-04-07 23:46
Platform
win7-20240319-en
Max time kernel
141s
Max time network
122s
Command Line
Signatures
UPX dump on OEP (original entry point)
| 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 |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\CTS.exe | N/A |
Reads user/profile data of web browsers
UPX packed file
| 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 |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" | C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" | C:\Windows\CTS.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\CTS.exe | C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe | N/A |
| File created | C:\Windows\CTS.exe | C:\Windows\CTS.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1600 wrote to memory of 2920 | N/A | C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe | C:\Windows\CTS.exe |
| PID 1600 wrote to memory of 2920 | N/A | C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe | C:\Windows\CTS.exe |
| PID 1600 wrote to memory of 2920 | N/A | C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe | C:\Windows\CTS.exe |
| PID 1600 wrote to memory of 2920 | N/A | C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe
"C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe"
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
Files
memory/1600-0-0x0000000000E10000-0x0000000000E27000-memory.dmp
memory/1600-4-0x0000000000070000-0x0000000000087000-memory.dmp
C:\Windows\CTS.exe
| MD5 | 286211b8e0aad0533c45d8b8c351cc70 |
| SHA1 | cb54a305a566c00742fb972c4ee62266e880ea78 |
| SHA256 | 1955407b2fd523e375303d560b987216b95105b421a8471218c0b65ceba847f3 |
| SHA512 | 91eddd484a40aee3a7a9254fd6843b3d9dd455e6a2c4d685d499ab1704d8644a6dc604ad14449e96b0754ae3e6c1c14c16d068605aa4e39840e0421aa7a4be35 |
memory/1600-12-0x0000000000070000-0x0000000000087000-memory.dmp
memory/2920-13-0x0000000000FD0000-0x0000000000FE7000-memory.dmp
memory/1600-10-0x0000000000E10000-0x0000000000E27000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\HDSIydjWGXne9Va.exe
| MD5 | 81d787bcda4e33d069708211f44336ea |
| SHA1 | 165797c65a15336d4062a7c4b4a22366f4f9f872 |
| SHA256 | ff31cdb7c3577dba99ac67d10903687dfa2f9580539d4269c4e149db04b07dbd |
| SHA512 | e4c1514cbd46d0de2dd08e42fe7f5f2b1b0b55724f15d898debf0050476b98de3cf98b094cb210ae6b2f776faea540902501a6500f653124a6e7d8ed75792d4d |
memory/1600-21-0x0000000000070000-0x0000000000087000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-07 23:44
Reported
2024-04-07 23:46
Platform
win10v2004-20240226-en
Max time kernel
142s
Max time network
142s
Command Line
Signatures
UPX dump on OEP (original entry point)
| 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 |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\CTS.exe | N/A |
Reads user/profile data of web browsers
UPX packed file
| 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 |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" | C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" | C:\Windows\CTS.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\CTS.exe | C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe | N/A |
| File created | C:\Windows\CTS.exe | C:\Windows\CTS.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4364 wrote to memory of 3388 | N/A | C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe | C:\Windows\CTS.exe |
| PID 4364 wrote to memory of 3388 | N/A | C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe | C:\Windows\CTS.exe |
| PID 4364 wrote to memory of 3388 | N/A | C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe
"C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe"
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
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=760 --field-trial-handle=2276,i,1205556100727695622,5044463180471657307,262144 --variations-seed-version /prefetch:8
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 228.249.119.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 36.56.20.217.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 17.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 58.55.71.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 103.169.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.126.166.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 130.118.77.104.in-addr.arpa | udp |
| US | 13.107.253.64:443 | tcp | |
| US | 8.8.8.8:53 | 43.56.20.217.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 98.56.20.217.in-addr.arpa | udp |
Files
memory/4364-0-0x00000000005C0000-0x00000000005D7000-memory.dmp
C:\Windows\CTS.exe
| MD5 | 286211b8e0aad0533c45d8b8c351cc70 |
| SHA1 | cb54a305a566c00742fb972c4ee62266e880ea78 |
| SHA256 | 1955407b2fd523e375303d560b987216b95105b421a8471218c0b65ceba847f3 |
| SHA512 | 91eddd484a40aee3a7a9254fd6843b3d9dd455e6a2c4d685d499ab1704d8644a6dc604ad14449e96b0754ae3e6c1c14c16d068605aa4e39840e0421aa7a4be35 |
memory/4364-6-0x00000000005C0000-0x00000000005D7000-memory.dmp
memory/3388-8-0x0000000000130000-0x0000000000147000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
| MD5 | 8dd6b7bea58e828ba83664e97517d2b3 |
| SHA1 | 570d5859ef904e1ccfd8a5099c610112af5b1846 |
| SHA256 | f9fa35a38a5cd40a9be1737ed6fd53d7a26ef74590d2e80ba24dac487e2c6b3d |
| SHA512 | 814e7a73b0280e139e0ee4ff8cfab822e142ba575d3efb4612c8369be5230e115bf25c545636091b30de4098ac693b7d93e8238845830d2e654e44bde574ec11 |
C:\Users\Admin\AppData\Local\Temp\fkN11rRNfm4VVt7.exe
| MD5 | f8f8c93eac92cd71e178137ccef9ef55 |
| SHA1 | af3dde6566485eeaeec26de3908d3098354369a0 |
| SHA256 | f992a996512c53eb0c51ba0ed95825826ca45d516eb960233cc8e8aec306eb2b |
| SHA512 | b330b26413300c7f727b86f7cb5550780d0151b306b3ed169889fca8b2b069d46eb408756d24033bacff2eacb8fa30fd09c6390be4f5a94e66d89145a7bc8a7c |
memory/3388-30-0x0000000000130000-0x0000000000147000-memory.dmp