agenttesla | 1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb

General

Target

1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb.exe
Size

124KB
MD5

6a31f01180e6ba81424c680fe3a3a662
SHA1

f6785d37cb8779dd5222397719464fc65d222b5c
SHA256

1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb
SHA512

1f4ae8ffc9fbd4cd04c1c1c8187eed3eba3e96596ddb6c0a0733d735d38b619b1a020d59721ebcbca2c8c9f099208f83a2cfe18e5a9c2b4c324ec73c661cd17f

Score

10^/10

agenttesla guloader collection downloader guloader keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

guloader

C2

http://jkkn.ac.in/winwin.exe_encrypted.bin

xor.base64

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
smtp.qilonqchem.com
Port:
587
Username:
[email protected]
Password:
NUfMG!E2

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

AgentTesla Payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4272-139-0x0000000000400000-0x000000000053A000-memory.dmp	family_agenttesla
behavioral2/memory/4272-140-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla

Guloader Payload 2 IoCs

guloader

Processes:

resource	yara_rule
behavioral2/memory/4272-132-0x0000000000000000-mapping.dmp	family_guloader
behavioral2/memory/4272-136-0x0000000000B00000-0x0000000000C00000-memory.dmp	family_guloader

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
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
T1081

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

RegAsm.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

RegAsm.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	RegAsm.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Startup key = "C:\\Users\\Admin\\subfolder1\\filename1.exe"	RegAsm.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 3 IoCs

Processes:

1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb.exeRegAsm.exe

pid process

2608 1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb.exe
4272 RegAsm.exe
4272 RegAsm.exe

pid	process
2608	1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb.exe
4272	RegAsm.exe
4272	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb.exe

description	pid	process	target process
PID 2608 set thread context of 4272	2608	1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb.exe	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

RegAsm.exe

pid process

4272 RegAsm.exe
4272 RegAsm.exe
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb.exe

pid process

2608 1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

RegAsm.exe

description pid process

Token: SeDebugPrivilege 4272 RegAsm.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb.exeRegAsm.exe

pid process

2608 1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb.exe
4272 RegAsm.exe

pid	process
4272	RegAsm.exe
4272	RegAsm.exe

pid	process
2608	1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb.exe

description	pid	process
Token: SeDebugPrivilege	4272	RegAsm.exe

pid	process
2608	1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb.exe
4272	RegAsm.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb.exe

description	pid	process	target process
PID 2608 wrote to memory of 4272	2608	1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb.exe	RegAsm.exe
PID 2608 wrote to memory of 4272	2608	1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb.exe	RegAsm.exe
PID 2608 wrote to memory of 4272	2608	1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb.exe	RegAsm.exe
PID 2608 wrote to memory of 4272	2608	1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb.exe	RegAsm.exe

outlook_office_path 1 IoCs

Processes:

RegAsm.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

outlook_win_path 1 IoCs

Processes:

RegAsm.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb.exe
"C:\Users\Admin\AppData\Local\Temp\1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb.exe"
1⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2608

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Users\Admin\AppData\Local\Temp\1be4b81f653a0a043c18a5507172f8a8fe30bea80a4ac8d6131853af9fe46ebb.exe"
2⤵
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
PID:4272

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

3

T1081

Discovery

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2608-135-0x0000000077280000-0x0000000077423000-memory.dmp

Filesize
1.6MB

Download
memory/2608-133-0x0000000002170000-0x000000000217A000-memory.dmp

Filesize
40KB

Download
memory/2608-134-0x00007FFEEAF50000-0x00007FFEEB145000-memory.dmp

Filesize
2.0MB

Download
memory/4272-138-0x0000000077280000-0x0000000077423000-memory.dmp

Filesize
1.6MB

Download
memory/4272-136-0x0000000000B00000-0x0000000000C00000-memory.dmp

Filesize
1024KB

Download
memory/4272-137-0x00007FFEEAF50000-0x00007FFEEB145000-memory.dmp

Filesize
2.0MB

Download
memory/4272-132-0x0000000000000000-mapping.dmp

Download
memory/4272-139-0x0000000000400000-0x000000000053A000-memory.dmp

Filesize
1.2MB

Download
memory/4272-140-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/4272-143-0x00000000226B0000-0x0000000022C54000-memory.dmp

Filesize
5.6MB

Download
memory/4272-144-0x0000000021F00000-0x0000000021F92000-memory.dmp

Filesize
584KB

Download
memory/4272-145-0x0000000022040000-0x00000000220DC000-memory.dmp

Filesize
624KB

Download
memory/4272-146-0x0000000022240000-0x00000000222A6000-memory.dmp

Filesize
408KB

Download
memory/4272-147-0x0000000022F20000-0x0000000022F2A000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads