agenttesla | f9192e96652f2dc469dadada2d64e3802caa27dc2bc3eaa2569aca8a272c50ad

General

Target

HALKBANK.exe
Size

620KB
MD5

a9b42ce32c33db28c6fc94a3a7f363fb
SHA1

1c08b215c178a267a083ee3a70baa9c0ba2e68e3
SHA256

45307bbc3304804c89746b960ba85f69c9ca725b0483afad2c13b3eb999800bc
SHA512

c76efcdffc09b4615039add1afa9c3646ffc1635e006c5a92faf66c4c8f062b3ad263cc25ebdd1c813692406954d37d76aa0e02da0bcd85221b26791b088dd21

Score

10^/10

agenttesla collection keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.bunsadokum.com
Port:
587
Username:
[email protected]
Password:
posta38Bunsa

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla

AgentTesla Payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2896-144-0x0000000000590000-0x00000000005DC000-memory.dmp	family_agenttesla

Executes dropped EXE 2 IoCs

Processes:

application.exeRegAsm.exe

pid process

1928 application.exe
2896 RegAsm.exe

pid	process
1928	application.exe
2896	RegAsm.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

Processes:

HALKBANK.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	HALKBANK.exe

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:

reg.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\application = "C:\\Windows\\system32\\pcalua.exe -a C:\\Users\\Admin\\AppData\\Roaming\\application.exe"	reg.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

application.exe

description pid process target process

PID 1928 set thread context of 2896 1928 application.exe RegAsm.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

2544 1928 WerFault.exe application.exe

description	pid	process	target process
PID 1928 set thread context of 2896	1928	application.exe	RegAsm.exe

pid	pid_target	process	target process
2544	1928	WerFault.exe	application.exe

Suspicious behavior: EnumeratesProcesses 27 IoCs

Processes:

HALKBANK.exeapplication.exeRegAsm.exe

pid	process
3328	HALKBANK.exe
3328	HALKBANK.exe
3328	HALKBANK.exe
3328	HALKBANK.exe
3328	HALKBANK.exe
3328	HALKBANK.exe
3328	HALKBANK.exe
3328	HALKBANK.exe
3328	HALKBANK.exe
3328	HALKBANK.exe
3328	HALKBANK.exe
3328	HALKBANK.exe
3328	HALKBANK.exe
3328	HALKBANK.exe
3328	HALKBANK.exe
3328	HALKBANK.exe
3328	HALKBANK.exe
3328	HALKBANK.exe
3328	HALKBANK.exe
3328	HALKBANK.exe
3328	HALKBANK.exe
3328	HALKBANK.exe
1928	application.exe
1928	application.exe
1928	application.exe
2896	RegAsm.exe
2896	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

HALKBANK.exeapplication.exeRegAsm.exe

description pid process

Token: SeDebugPrivilege 3328 HALKBANK.exe
Token: SeDebugPrivilege 1928 application.exe
Token: SeDebugPrivilege 2896 RegAsm.exe

description	pid	process
Token: SeDebugPrivilege	3328	HALKBANK.exe
Token: SeDebugPrivilege	1928	application.exe
Token: SeDebugPrivilege	2896	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

HALKBANK.execmd.exeapplication.exe

description	pid	process	target process
PID 3328 wrote to memory of 2936	3328	HALKBANK.exe	cmd.exe
PID 3328 wrote to memory of 2936	3328	HALKBANK.exe	cmd.exe
PID 3328 wrote to memory of 2936	3328	HALKBANK.exe	cmd.exe
PID 2936 wrote to memory of 3180	2936	cmd.exe	reg.exe
PID 2936 wrote to memory of 3180	2936	cmd.exe	reg.exe
PID 2936 wrote to memory of 3180	2936	cmd.exe	reg.exe
PID 3328 wrote to memory of 1928	3328	HALKBANK.exe	application.exe
PID 3328 wrote to memory of 1928	3328	HALKBANK.exe	application.exe
PID 3328 wrote to memory of 1928	3328	HALKBANK.exe	application.exe
PID 1928 wrote to memory of 2896	1928	application.exe	RegAsm.exe
PID 1928 wrote to memory of 2896	1928	application.exe	RegAsm.exe
PID 1928 wrote to memory of 2896	1928	application.exe	RegAsm.exe
PID 1928 wrote to memory of 2896	1928	application.exe	RegAsm.exe
PID 1928 wrote to memory of 2896	1928	application.exe	RegAsm.exe
PID 1928 wrote to memory of 2896	1928	application.exe	RegAsm.exe
PID 1928 wrote to memory of 2896	1928	application.exe	RegAsm.exe
PID 1928 wrote to memory of 2896	1928	application.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\HALKBANK.exe
"C:\Users\Admin\AppData\Local\Temp\HALKBANK.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3328

C:\Windows\SysWOW64\cmd.exe
"cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v application /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\application.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:2936

C:\Windows\SysWOW64\reg.exe
REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v application /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\application.exe"
3⤵
- Adds Run key to start application
PID:3180

C:\Users\Admin\AppData\Roaming\application.exe
"C:\Users\Admin\AppData\Roaming\application.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1928

C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
"C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"
3⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:2896

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1928 -s 1364
3⤵
- Program crash
PID:2544

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 200 -p 1928 -ip 1928
1⤵
PID:2540

Network

MITRE ATT&CK Matrix ATT&CK 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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
Filesize
63KB

MD5
0d5df43af2916f47d00c1573797c1a13

SHA1
230ab5559e806574d26b4c20847c368ed55483b0

SHA256
c066aee7aa3aa83f763ebc5541daa266ed6c648fbffcde0d836a13b221bb2adc

SHA512
f96cf9e1890746b12daf839a6d0f16f062b72c1b8a40439f96583f242980f10f867720232a6fa0f7d4d7ac0a7a6143981a5a130d6417ea98b181447134c7cfe2

Download Submit
C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
Filesize
63KB

MD5
0d5df43af2916f47d00c1573797c1a13

SHA1
230ab5559e806574d26b4c20847c368ed55483b0

SHA256
c066aee7aa3aa83f763ebc5541daa266ed6c648fbffcde0d836a13b221bb2adc

SHA512
f96cf9e1890746b12daf839a6d0f16f062b72c1b8a40439f96583f242980f10f867720232a6fa0f7d4d7ac0a7a6143981a5a130d6417ea98b181447134c7cfe2

Download Submit
C:\Users\Admin\AppData\Roaming\application.exe
Filesize
620KB

MD5
a9b42ce32c33db28c6fc94a3a7f363fb

SHA1
1c08b215c178a267a083ee3a70baa9c0ba2e68e3

SHA256
45307bbc3304804c89746b960ba85f69c9ca725b0483afad2c13b3eb999800bc

SHA512
c76efcdffc09b4615039add1afa9c3646ffc1635e006c5a92faf66c4c8f062b3ad263cc25ebdd1c813692406954d37d76aa0e02da0bcd85221b26791b088dd21

Download Submit
C:\Users\Admin\AppData\Roaming\application.exe
Filesize
620KB

MD5
a9b42ce32c33db28c6fc94a3a7f363fb

SHA1
1c08b215c178a267a083ee3a70baa9c0ba2e68e3

SHA256
45307bbc3304804c89746b960ba85f69c9ca725b0483afad2c13b3eb999800bc

SHA512
c76efcdffc09b4615039add1afa9c3646ffc1635e006c5a92faf66c4c8f062b3ad263cc25ebdd1c813692406954d37d76aa0e02da0bcd85221b26791b088dd21

Download Submit
memory/1928-136-0x0000000000000000-mapping.dmp

Download
memory/1928-139-0x0000000006C60000-0x0000000006C82000-memory.dmp

Filesize
136KB

Download
memory/2896-144-0x0000000000590000-0x00000000005DC000-memory.dmp

Filesize
304KB

Download
memory/2896-140-0x0000000000000000-mapping.dmp

Download
memory/2896-145-0x0000000004CE0000-0x0000000004D7C000-memory.dmp

Filesize
624KB

Download
memory/2896-146-0x0000000005990000-0x00000000059F6000-memory.dmp

Filesize
408KB

Download
memory/2896-147-0x0000000005EC0000-0x0000000005F10000-memory.dmp

Filesize
320KB

Download
memory/2896-148-0x0000000005E90000-0x0000000005E9A000-memory.dmp

Filesize
40KB

Download
memory/2936-134-0x0000000000000000-mapping.dmp

Download
memory/3180-135-0x0000000000000000-mapping.dmp

Download
memory/3328-133-0x00000000056E0000-0x0000000005724000-memory.dmp

Filesize
272KB

Download
memory/3328-130-0x0000000000AF0000-0x0000000000B92000-memory.dmp

Filesize
648KB

Download
memory/3328-132-0x0000000005540000-0x00000000055D2000-memory.dmp

Filesize
584KB

Download
memory/3328-131-0x0000000005A50000-0x0000000005FF4000-memory.dmp

Filesize
5.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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