agenttesla | 6d123955f4e88f7aa0e4466d063033f054f28714a53229c77e18d5cfaee44792

General

Target

CT_Y039581726.exe
Size

509KB
MD5

120d7f3a1d90817bae339b50b40d17d3
SHA1

79ce12a56cda10d463fc45926eeb216c133d9702
SHA256

48a8412a53603f0802d074c01c6792940732155c95b38b168d37965ecadba031
SHA512

dc60c97026a63cd77ab241a8cb63ac1875ba1af6fe76aa1f30dc3fe6d04c3c0bd1ff6ae3d4f5b096540a76b7bb6e826f91242fab5c68836822aea9b63f6e173a

Score

10^/10

agenttesla collection coreentity keylogger rezer0 spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
smtp.gfaqrochem.com
Port:
587
Username:
turkey@gfaqrochem.com
Password:
k@rCFBF4

Signatures

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

CoreEntity .NET Packer 1 IoCs

A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.

coreentity

Processes:

resource	yara_rule
behavioral1/memory/1972-56-0x0000000000690000-0x0000000000698000-memory.dmp	coreentity

AgentTesla Payload 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2008-63-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/2008-64-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/2008-66-0x000000000044C39E-mapping.dmp	family_agenttesla
behavioral1/memory/2008-65-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/2008-68-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/2008-70-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla

ReZer0 packer 1 IoCs

Detects ReZer0, a packer with multiple versions used in various campaigns.

rezer0

Processes:

resource	yara_rule
behavioral1/memory/1972-57-0x0000000006F50000-0x0000000006FA8000-memory.dmp	rezer0

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:

CT_Y039581726.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	CT_Y039581726.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	CT_Y039581726.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	CT_Y039581726.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

CT_Y039581726.exe

description pid process target process

PID 1972 set thread context of 2008 1972 CT_Y039581726.exe CT_Y039581726.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
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
T1053

Processes:

schtasks.exe

pid process

1264 schtasks.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

CT_Y039581726.exe

pid process

2008 CT_Y039581726.exe
2008 CT_Y039581726.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

CT_Y039581726.exe

description pid process

Token: SeDebugPrivilege 2008 CT_Y039581726.exe

description	pid	process	target process
PID 1972 set thread context of 2008	1972	CT_Y039581726.exe	CT_Y039581726.exe

pid	process
1264	schtasks.exe

pid	process
2008	CT_Y039581726.exe
2008	CT_Y039581726.exe

description	pid	process
Token: SeDebugPrivilege	2008	CT_Y039581726.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

CT_Y039581726.exeCT_Y039581726.exe

description	pid	process	target process
PID 1972 wrote to memory of 1264	1972	CT_Y039581726.exe	schtasks.exe
PID 1972 wrote to memory of 1264	1972	CT_Y039581726.exe	schtasks.exe
PID 1972 wrote to memory of 1264	1972	CT_Y039581726.exe	schtasks.exe
PID 1972 wrote to memory of 1264	1972	CT_Y039581726.exe	schtasks.exe
PID 1972 wrote to memory of 2008	1972	CT_Y039581726.exe	CT_Y039581726.exe
PID 1972 wrote to memory of 2008	1972	CT_Y039581726.exe	CT_Y039581726.exe
PID 1972 wrote to memory of 2008	1972	CT_Y039581726.exe	CT_Y039581726.exe
PID 1972 wrote to memory of 2008	1972	CT_Y039581726.exe	CT_Y039581726.exe
PID 1972 wrote to memory of 2008	1972	CT_Y039581726.exe	CT_Y039581726.exe
PID 1972 wrote to memory of 2008	1972	CT_Y039581726.exe	CT_Y039581726.exe
PID 1972 wrote to memory of 2008	1972	CT_Y039581726.exe	CT_Y039581726.exe
PID 1972 wrote to memory of 2008	1972	CT_Y039581726.exe	CT_Y039581726.exe
PID 1972 wrote to memory of 2008	1972	CT_Y039581726.exe	CT_Y039581726.exe
PID 2008 wrote to memory of 296	2008	CT_Y039581726.exe	netsh.exe
PID 2008 wrote to memory of 296	2008	CT_Y039581726.exe	netsh.exe
PID 2008 wrote to memory of 296	2008	CT_Y039581726.exe	netsh.exe
PID 2008 wrote to memory of 296	2008	CT_Y039581726.exe	netsh.exe

outlook_office_path 1 IoCs

Processes:

CT_Y039581726.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	CT_Y039581726.exe

outlook_win_path 1 IoCs

Processes:

CT_Y039581726.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	CT_Y039581726.exe

C:\Users\Admin\AppData\Local\Temp\CT_Y039581726.exe
"C:\Users\Admin\AppData\Local\Temp\CT_Y039581726.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1972

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\qFzTXiSqzah" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9399.tmp"
2⤵
- Creates scheduled task(s)
PID:1264

C:\Users\Admin\AppData\Local\Temp\CT_Y039581726.exe
"{path}"
2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
PID:2008

C:\Windows\SysWOW64\netsh.exe
"netsh" wlan show profile
3⤵
PID:296

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Credentials in Files

3

T1081

Discovery

System Information Discovery

1

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\tmp9399.tmp
Filesize
1KB

MD5
344509486cef74343bc48eb602bcdb80

SHA1
5df3561c70340512e60b0c16999271ae80e7bb1d

SHA256
78109efbffdf8e5fe59485021e2cc91ea02ea0ce57c8c1fbb94fb0f2d0b9a6ac

SHA512
ffeb0b8faf9653c672784f115177b4665087c4260b70f10cf475cf2bb60d98bcd3f6e74ff2ae4620b868edded4384b38a60802866bc5db599a393e1572105288

Download Submit
memory/296-72-0x0000000000000000-mapping.dmp

Download
memory/1264-58-0x0000000000000000-mapping.dmp

Download
memory/1972-55-0x0000000075501000-0x0000000075503000-memory.dmp

Filesize
8KB

Download
memory/1972-56-0x0000000000690000-0x0000000000698000-memory.dmp

Filesize
32KB

Download
memory/1972-57-0x0000000006F50000-0x0000000006FA8000-memory.dmp

Filesize
352KB

Download
memory/1972-54-0x0000000000E50000-0x0000000000ED6000-memory.dmp

Filesize
536KB

Download
memory/2008-60-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/2008-63-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/2008-64-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/2008-66-0x000000000044C39E-mapping.dmp

Download
memory/2008-65-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/2008-68-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/2008-70-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/2008-61-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads