agenttesla | f84f36180f2ebb246355b50954519a7e1a98e2e064ce8ede63ef266e9242f396

General

Target

bNjdGneVfRkYyV6.exe
Size

573KB
MD5

bdc03e1649f005b65146756fdf737f3e
SHA1

c194910f8220fb1d3f2d8e95803a54d5a8d9cb46
SHA256

d6f0c8635b3633a57516f738ace0b4feb392894885b604d426b950c0c95d705d
SHA512

5744393efe0499756e8a70580fa5995c8805dc38ffd994421d3285b61f2cfbe83c6fb6520c96fd9b0ff96f020b4c501a8868d27f018b1068abec4a0c6820499d

Score

10^/10

agenttesla collection evasion keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.elkat.com.my
Port:
587
Username:
[email protected]
Password:
$9921%sales

Signatures

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

AgentTesla Payload 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/948-62-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral1/memory/948-64-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral1/memory/948-63-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral1/memory/948-65-0x000000000044706E-mapping.dmp	family_agenttesla
behavioral1/memory/948-67-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral1/memory/948-69-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla

Looks for VirtualBox Guest Additions in registry 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497
Looks for VMWare Tools registry key 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Checks BIOS information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

bNjdGneVfRkYyV6.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	bNjdGneVfRkYyV6.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	bNjdGneVfRkYyV6.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:

bNjdGneVfRkYyV6.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	bNjdGneVfRkYyV6.exe
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	bNjdGneVfRkYyV6.exe
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	bNjdGneVfRkYyV6.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

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

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

bNjdGneVfRkYyV6.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	bNjdGneVfRkYyV6.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	bNjdGneVfRkYyV6.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

bNjdGneVfRkYyV6.exe

description pid process target process

PID 1372 set thread context of 948 1372 bNjdGneVfRkYyV6.exe bNjdGneVfRkYyV6.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

bNjdGneVfRkYyV6.exebNjdGneVfRkYyV6.exe

pid process

1372 bNjdGneVfRkYyV6.exe
1372 bNjdGneVfRkYyV6.exe
948 bNjdGneVfRkYyV6.exe
948 bNjdGneVfRkYyV6.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

bNjdGneVfRkYyV6.exebNjdGneVfRkYyV6.exe

description pid process

Token: SeDebugPrivilege 1372 bNjdGneVfRkYyV6.exe
Token: SeDebugPrivilege 948 bNjdGneVfRkYyV6.exe

description	pid	process	target process
PID 1372 set thread context of 948	1372	bNjdGneVfRkYyV6.exe	bNjdGneVfRkYyV6.exe

pid	process
1372	bNjdGneVfRkYyV6.exe
1372	bNjdGneVfRkYyV6.exe
948	bNjdGneVfRkYyV6.exe
948	bNjdGneVfRkYyV6.exe

description	pid	process
Token: SeDebugPrivilege	1372	bNjdGneVfRkYyV6.exe
Token: SeDebugPrivilege	948	bNjdGneVfRkYyV6.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

bNjdGneVfRkYyV6.exe

description	pid	process	target process
PID 1372 wrote to memory of 948	1372	bNjdGneVfRkYyV6.exe	bNjdGneVfRkYyV6.exe
PID 1372 wrote to memory of 948	1372	bNjdGneVfRkYyV6.exe	bNjdGneVfRkYyV6.exe
PID 1372 wrote to memory of 948	1372	bNjdGneVfRkYyV6.exe	bNjdGneVfRkYyV6.exe
PID 1372 wrote to memory of 948	1372	bNjdGneVfRkYyV6.exe	bNjdGneVfRkYyV6.exe
PID 1372 wrote to memory of 948	1372	bNjdGneVfRkYyV6.exe	bNjdGneVfRkYyV6.exe
PID 1372 wrote to memory of 948	1372	bNjdGneVfRkYyV6.exe	bNjdGneVfRkYyV6.exe
PID 1372 wrote to memory of 948	1372	bNjdGneVfRkYyV6.exe	bNjdGneVfRkYyV6.exe
PID 1372 wrote to memory of 948	1372	bNjdGneVfRkYyV6.exe	bNjdGneVfRkYyV6.exe
PID 1372 wrote to memory of 948	1372	bNjdGneVfRkYyV6.exe	bNjdGneVfRkYyV6.exe

outlook_office_path 1 IoCs

Processes:

bNjdGneVfRkYyV6.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	bNjdGneVfRkYyV6.exe

outlook_win_path 1 IoCs

Processes:

bNjdGneVfRkYyV6.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	bNjdGneVfRkYyV6.exe

C:\Users\Admin\AppData\Local\Temp\bNjdGneVfRkYyV6.exe
"C:\Users\Admin\AppData\Local\Temp\bNjdGneVfRkYyV6.exe"
1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1372

C:\Users\Admin\AppData\Local\Temp\bNjdGneVfRkYyV6.exe
"{path}"
2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:948

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Credentials in Files

3

T1081

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

2

T1082

Virtualization/Sandbox Evasion

2

T1497

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/948-63-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/948-59-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/948-60-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/948-62-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/948-64-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/948-65-0x000000000044706E-mapping.dmp

Download
memory/948-67-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/948-69-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/1372-55-0x0000000075B71000-0x0000000075B73000-memory.dmp

Filesize
8KB

Download
memory/1372-56-0x0000000000250000-0x000000000025A000-memory.dmp

Filesize
40KB

Download
memory/1372-57-0x00000000056B0000-0x000000000572E000-memory.dmp

Filesize
504KB

Download
memory/1372-58-0x0000000005190000-0x0000000005202000-memory.dmp

Filesize
456KB

Download
memory/1372-54-0x0000000000F30000-0x0000000000FC6000-memory.dmp

Filesize
600KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads