asyncrat | a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282

Windows Service

T1543.003

Disable or Modify Tools

T1562.001

Processes:

Loaader.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection	Loaader.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	Loaader.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	Loaader.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	Loaader.exe

Stealerium
An open source info stealer written in C# first seen in May 2022.
stealer stealerium

UAC bypass 3 TTPs 3 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

Processes:

Loaader.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\consentpromptbehavioradmin = "0"	Loaader.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\enablelua = "0"	Loaader.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\promptonsecuredesktop = "0"	Loaader.exe

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\Loaader.exe	family_asyncrat

Checks computer location settings 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

Processes:

a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exeLoaader.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	Loaader.exe

Executes dropped EXE 1 IoCs

Processes:

Loaader.exe

pid process

528 Loaader.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Windows security modification 2 TTPs 1 IoCs
evasion trojan

Disable or Modify Tools
T1562.001

Modify Registry
T1112

Processes:

Loaader.exe

description ioc process

Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Features\TamperProtection = "0" Loaader.exe

pid	process
528	Loaader.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Features\TamperProtection = "0"	Loaader.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

Loaader.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Loaader.exe
Key opened	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Loaader.exe
Key opened	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Loaader.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

Processes:

Loaader.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\enablelua	Loaader.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\enablelua = "0"	Loaader.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.

Processes:

flow ioc

56 icanhazip.com
58 ip-api.com
Looks up geolocation information via web service
Uses a legitimate geolocation service to find the infected system's geolocation info.
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

flow	ioc
56	icanhazip.com
58	ip-api.com

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

Processes:

Loaader.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	Loaader.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	Loaader.exe

Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exe

pid process

3720 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

696 timeout.exe

pid	process
3720	schtasks.exe

pid	process
696	timeout.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exepowershell.exepowershell.exeLoaader.exe

pid	process
4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
5108	powershell.exe
5108	powershell.exe
904	powershell.exe
904	powershell.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe
528	Loaader.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exeLoaader.exepowershell.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
Token: SeDebugPrivilege	528	Loaader.exe
Token: SeDebugPrivilege	5108	powershell.exe
Token: SeDebugPrivilege	904	powershell.exe

Suspicious use of WriteProcessMemory 28 IoCs

Processes:

a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.execmd.execmd.exeLoaader.execmd.execmd.exe

description	pid	process	target process
PID 4888 wrote to memory of 832	4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe	cmd.exe
PID 4888 wrote to memory of 832	4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe	cmd.exe
PID 4888 wrote to memory of 2572	4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe	cmd.exe
PID 4888 wrote to memory of 2572	4888	a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe	cmd.exe
PID 2572 wrote to memory of 696	2572	cmd.exe	timeout.exe
PID 2572 wrote to memory of 696	2572	cmd.exe	timeout.exe
PID 832 wrote to memory of 3720	832	cmd.exe	schtasks.exe
PID 832 wrote to memory of 3720	832	cmd.exe	schtasks.exe
PID 2572 wrote to memory of 528	2572	cmd.exe	Loaader.exe
PID 2572 wrote to memory of 528	2572	cmd.exe	Loaader.exe
PID 528 wrote to memory of 5108	528	Loaader.exe	powershell.exe
PID 528 wrote to memory of 5108	528	Loaader.exe	powershell.exe
PID 528 wrote to memory of 904	528	Loaader.exe	powershell.exe
PID 528 wrote to memory of 904	528	Loaader.exe	powershell.exe
PID 528 wrote to memory of 1884	528	Loaader.exe	cmd.exe
PID 528 wrote to memory of 1884	528	Loaader.exe	cmd.exe
PID 1884 wrote to memory of 4088	1884	cmd.exe	chcp.com
PID 1884 wrote to memory of 4088	1884	cmd.exe	chcp.com
PID 1884 wrote to memory of 3548	1884	cmd.exe	netsh.exe
PID 1884 wrote to memory of 3548	1884	cmd.exe	netsh.exe
PID 1884 wrote to memory of 1684	1884	cmd.exe	findstr.exe
PID 1884 wrote to memory of 1684	1884	cmd.exe	findstr.exe
PID 528 wrote to memory of 2312	528	Loaader.exe	cmd.exe
PID 528 wrote to memory of 2312	528	Loaader.exe	cmd.exe
PID 2312 wrote to memory of 1956	2312	cmd.exe	chcp.com
PID 2312 wrote to memory of 1956	2312	cmd.exe	chcp.com
PID 2312 wrote to memory of 3872	2312	cmd.exe	netsh.exe
PID 2312 wrote to memory of 3872	2312	cmd.exe	netsh.exe

System policy modification 1 TTPs 3 IoCs

evasion

Modify Registry

Processes:

Loaader.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\consentpromptbehavioradmin = "0"	Loaader.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\enablelua = "0"	Loaader.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\promptonsecuredesktop = "0"	Loaader.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

outlook_office_path 1 IoCs

Processes:

Loaader.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Loaader.exe

outlook_win_path 1 IoCs

Processes:

Loaader.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Loaader.exe

C:\Users\Admin\AppData\Local\Temp\a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
"C:\Users\Admin\AppData\Local\Temp\a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4888

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Loaader" /tr '"C:\Users\Admin\AppData\Roaming\Loaader.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:832

C:\Windows\system32\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "Loaader" /tr '"C:\Users\Admin\AppData\Roaming\Loaader.exe"'
3⤵
- Creates scheduled task(s)
PID:3720

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5285.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:2572

C:\Windows\system32\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:696

C:\Users\Admin\AppData\Roaming\Loaader.exe
"C:\Users\Admin\AppData\Roaming\Loaader.exe"
3⤵
- Modifies Windows Defender Real-time Protection settings
- UAC bypass
- Checks computer location settings
- Executes dropped EXE
- Windows security modification
- Accesses Microsoft Outlook profiles
- Checks whether UAC is enabled
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
- outlook_office_path
- outlook_win_path
PID:528

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"powershell" Get-MpPreference -verbose
4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:5108

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add - MpPreference - ExclusionExtension ".exe"
4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:904

C:\Windows\SYSTEM32\cmd.exe
"cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
4⤵
- Suspicious use of WriteProcessMemory
PID:1884

C:\Windows\system32\chcp.com
chcp 65001
5⤵
PID:4088

C:\Windows\system32\netsh.exe
netsh wlan show profile
5⤵
PID:3548

C:\Windows\system32\findstr.exe
findstr All
5⤵
PID:1684

C:\Windows\SYSTEM32\cmd.exe
"cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
4⤵
- Suspicious use of WriteProcessMemory
PID:2312

C:\Windows\system32\chcp.com
chcp 65001
5⤵
PID:1956

C:\Windows\system32\netsh.exe
netsh wlan show networks mode=bssid
5⤵
PID:3872

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Create or Modify System Process

T1543

Windows Service

Scheduled Task/Job

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

Scheduled Task/Job

Defense Evasion

Modify Registry

4

Impair Defenses

3

T1562

Disable or Modify Tools

3

T1562.001

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

3

T1012

System Information Discovery

4

Lateral Movement

Collection

Data from Local System

T1005

Email Collection