agenttesla | 03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7

Bypass User Account Control

T1548.002

Disable or Modify Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe

Windows security bypass 2 TTPs 2 IoCs

Disable or Modify Tools

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths	03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe = "0"	03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe

Detect packed .NET executables. Mostly AgentTeslaV4. 1 IoCs

resource	yara_rule
behavioral2/memory/4424-5-0x0000000000400000-0x0000000000442000-memory.dmp	INDICATOR_EXE_Packed_GEN01

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 1 IoCs

resource	yara_rule
behavioral2/memory/4424-5-0x0000000000400000-0x0000000000442000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Detects executables packed with or use KoiVM 1 IoCs

resource	yara_rule
behavioral2/memory/3972-3-0x000001FAF7A80000-0x000001FAF7B16000-memory.dmp	INDICATOR_EXE_Packed_KoiVM

Detects executables referencing Windows vault credential objects. Observed in infostealers 1 IoCs

resource	yara_rule
behavioral2/memory/4424-5-0x0000000000400000-0x0000000000442000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_VaultSchemaGUID

Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers 1 IoCs

resource	yara_rule
behavioral2/memory/4424-5-0x0000000000400000-0x0000000000442000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store

Detects executables referencing many email and collaboration clients. Observed in information stealers 1 IoCs

resource	yara_rule
behavioral2/memory/4424-5-0x0000000000400000-0x0000000000442000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients

Detects executables referencing many file transfer clients. Observed in information stealers 1 IoCs

resource	yara_rule
behavioral2/memory/4424-5-0x0000000000400000-0x0000000000442000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_Referenfces_File_Transfer_Clients

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
4416	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-877519540-908060166-1852957295-1000\Control Panel\International\Geo\Nation	03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe

Windows security modification 2 TTPs 3 IoCs

Disable or Modify Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe = "0"	03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths	03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions	03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
21	api.ipify.org
22	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3972 set thread context of 4424	3972	03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe	97

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4416	powershell.exe
4416	powershell.exe
4416	powershell.exe
4424	regsvcs.exe
4424	regsvcs.exe
4424	regsvcs.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3972	03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe
Token: SeDebugPrivilege	4416	powershell.exe
Token: SeDebugPrivilege	4424	regsvcs.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 3972 wrote to memory of 4416	3972	03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe	95
PID 3972 wrote to memory of 4416	3972	03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe	95
PID 3972 wrote to memory of 4424	3972	03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe	97
PID 3972 wrote to memory of 4424	3972	03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe	97
PID 3972 wrote to memory of 4424	3972	03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe	97
PID 3972 wrote to memory of 4424	3972	03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe	97
PID 3972 wrote to memory of 4424	3972	03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe	97
PID 3972 wrote to memory of 4424	3972	03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe	97
PID 3972 wrote to memory of 4424	3972	03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe	97
PID 3972 wrote to memory of 4424	3972	03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe	97
PID 3972 wrote to memory of 452	3972	03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe	98
PID 3972 wrote to memory of 452	3972	03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe	98
PID 3972 wrote to memory of 452	3972	03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe	98

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe

C:\Users\Admin\AppData\Local\Temp\03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe
"C:\Users\Admin\AppData\Local\Temp\03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe"
1⤵
- UAC bypass
- Windows security bypass
- Checks computer location settings
- Windows security modification
- Checks whether UAC is enabled
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:3972
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\03f7e2bf4455b9effd710bdc69dfa7f559232731be89deef8070048b994bcad7.exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4416
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4424
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe"
  2⤵
  PID:452

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

Modify Registry