Analysis Overview
SHA256
a34cb7528e3a832e088452e887f7c420699d43c928172bdf7fb344b96ff2e81d
Threat Level: Known bad
The file a34cb7528e3a832e088452e887f7c420699d43c928172bdf7fb344b96ff2e81d.exe was found to be: Known bad.
Malicious Activity Summary
Remcos
UAC bypass
Windows security bypass
Command and Scripting Interpreter: PowerShell
Checks computer location settings
Executes dropped EXE
Windows security modification
Adds Run key to start application
Checks whether UAC is enabled
Suspicious use of SetThreadContext
Program crash
Unsigned PE
Enumerates physical storage devices
System policy modification
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Delays execution with timeout.exe
Creates scheduled task(s)
Uses Task Scheduler COM API
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-05-09 10:08
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-05-09 10:08
Reported
2024-05-09 10:10
Platform
win7-20240508-en
Max time kernel
122s
Max time network
122s
Command Line
Signatures
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\a34cb7528e3a832e088452e887f7c420699d43c928172bdf7fb344b96ff2e81d.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2548 wrote to memory of 1144 | N/A | C:\Users\Admin\AppData\Local\Temp\a34cb7528e3a832e088452e887f7c420699d43c928172bdf7fb344b96ff2e81d.exe | C:\Windows\system32\WerFault.exe |
| PID 2548 wrote to memory of 1144 | N/A | C:\Users\Admin\AppData\Local\Temp\a34cb7528e3a832e088452e887f7c420699d43c928172bdf7fb344b96ff2e81d.exe | C:\Windows\system32\WerFault.exe |
| PID 2548 wrote to memory of 1144 | N/A | C:\Users\Admin\AppData\Local\Temp\a34cb7528e3a832e088452e887f7c420699d43c928172bdf7fb344b96ff2e81d.exe | C:\Windows\system32\WerFault.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\a34cb7528e3a832e088452e887f7c420699d43c928172bdf7fb344b96ff2e81d.exe
"C:\Users\Admin\AppData\Local\Temp\a34cb7528e3a832e088452e887f7c420699d43c928172bdf7fb344b96ff2e81d.exe"
C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -u -p 2548 -s 580
Network
Files
memory/2548-0-0x000007FEF53B3000-0x000007FEF53B4000-memory.dmp
memory/2548-1-0x0000000001320000-0x000000000137A000-memory.dmp
memory/2548-2-0x000007FEF53B0000-0x000007FEF5D9C000-memory.dmp
memory/2548-3-0x000007FEF53B3000-0x000007FEF53B4000-memory.dmp
memory/2548-4-0x000007FEF53B0000-0x000007FEF5D9C000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-05-09 10:08
Reported
2024-05-09 10:10
Platform
win10v2004-20240426-en
Max time kernel
150s
Max time network
150s
Command Line
Signatures
Remcos
UAC bypass
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
Windows security bypass
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Roaming\svchost.exe = "0" | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
Command and Scripting Interpreter: PowerShell
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\a34cb7528e3a832e088452e887f7c420699d43c928172bdf7fb344b96ff2e81d.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
Windows security modification
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Roaming\svchost.exe = "0" | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "\"C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe\"" | C:\Users\Admin\AppData\Local\Temp\a34cb7528e3a832e088452e887f7c420699d43c928172bdf7fb344b96ff2e81d.exe | N/A |
Checks whether UAC is enabled
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 4792 set thread context of 1184 | N/A | C:\Users\Admin\AppData\Roaming\svchost.exe | C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe |
Enumerates physical storage devices
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe |
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
Delays execution with timeout.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\timeout.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\a34cb7528e3a832e088452e887f7c420699d43c928172bdf7fb344b96ff2e81d.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
Suspicious use of WriteProcessMemory
System policy modification
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\a34cb7528e3a832e088452e887f7c420699d43c928172bdf7fb344b96ff2e81d.exe
"C:\Users\Admin\AppData\Local\Temp\a34cb7528e3a832e088452e887f7c420699d43c928172bdf7fb344b96ff2e81d.exe"
C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit
C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp45B4.tmp.bat""
C:\Windows\system32\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
C:\Windows\system32\timeout.exe
timeout 3
C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\svchost.exe" -Force
C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 1184 -ip 1184
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1184 -s 24
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 8.8.8.8.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 | 237.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 154.239.44.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 79.190.18.2.in-addr.arpa | udp |
| BE | 2.17.196.80:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 71.31.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 80.196.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.86.106.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 104.219.191.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 103.169.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.229.111.52.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 | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | 200.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | udp |
Files
memory/4048-0-0x00000240BB8B0000-0x00000240BB90A000-memory.dmp
memory/4048-1-0x00007FFC73A83000-0x00007FFC73A85000-memory.dmp
memory/4048-2-0x00007FFC73A80000-0x00007FFC74541000-memory.dmp
memory/4048-3-0x00000240D5CF0000-0x00000240D5DC4000-memory.dmp
memory/4048-8-0x00007FFC73A80000-0x00007FFC74541000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\tmp45B4.tmp.bat
| MD5 | db3a46a9b69dd2336a2bb763b4a8a7ea |
| SHA1 | 7b6f18fd9614e819f7eeb4ff48eda983cb6423f8 |
| SHA256 | e2a83c68235946fe4ad2deca8242b9d8fd615263a3ba1d6df0addbb6fd0f4d2e |
| SHA512 | 89816b7ad676af6da9242c2c17c85b691037271afc41078cbe2e9458350f2a3b990cc0400ff01255e75857783044f1af242490f7cd5471c0dc52aa29c136e022 |
C:\Users\Admin\AppData\Roaming\svchost.exe
| MD5 | 6396cf12253c6f9a3ce1607be6df95ca |
| SHA1 | a9525c26f5010f1c149403ab83944a575bfb45b5 |
| SHA256 | a34cb7528e3a832e088452e887f7c420699d43c928172bdf7fb344b96ff2e81d |
| SHA512 | 8c3126ce810f49307dd09b0062c56844a98b7b900fbdf2f7b6f74db9b6a5647f3d3330c3fb7b1664272f485f5d2a2818060b299b0958d9c62ecf0912f9c7276d |
memory/1184-13-0x0000000000400000-0x0000000000482000-memory.dmp
memory/1648-23-0x000002257C550000-0x000002257C572000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lv2pn1vc.5l5.ps1
| MD5 | d17fe0a3f47be24a6453e9ef58c94641 |
| SHA1 | 6ab83620379fc69f80c0242105ddffd7d98d5d9d |
| SHA256 | 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7 |
| SHA512 | 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82 |