agenttesla | 3a94befc248570bf58be57f7b0e146985221219aefed7e437ddf865711b7c069

General

Target

Purchase - Order.exe
Size

491KB
MD5

c25db03537a94168fe05f968720c735a
SHA1

bdf8b7786bdd448a689e06347895ca8dbddab79c
SHA256

3a94befc248570bf58be57f7b0e146985221219aefed7e437ddf865711b7c069
SHA512

26f27f98183de9f87807add66919fbeabf1e6373dfd98360348860f551f3292deb347560cd2ac0fe7372424374d5f1b8a8add9d92739bca32e725374bb974241

Score

10^/10

agenttesla evasion keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.zakhourco.com
Port:
587
Username:
mira.kassar@zakhourco.com
Password:
#Za$out%12

Signatures

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

AgentTesla Payload 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1760-67-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/1760-68-0x000000000043784E-mapping.dmp	family_agenttesla
behavioral1/memory/1760-69-0x0000000000400000-0x000000000043C000-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:

Purchase - Order.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Purchase - Order.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Purchase - Order.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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Purchase - Order.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\Run\lfEDL = "C:\\Users\\Admin\\AppData\\Roaming\\lfEDL\\lfEDL.exe"	Purchase - Order.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:

Purchase - Order.exe

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

Suspicious use of SetThreadContext 1 IoCs

Processes:

Purchase - Order.exe

description pid process target process

PID 1104 set thread context of 1760 1104 Purchase - Order.exe Purchase - Order.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

640 schtasks.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

Purchase - Order.exe

pid process

1760 Purchase - Order.exe
1760 Purchase - Order.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Purchase - Order.exe

description pid process

Token: SeDebugPrivilege 1760 Purchase - Order.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Purchase - Order.exe

pid process

1760 Purchase - Order.exe

description	pid	process	target process
PID 1104 set thread context of 1760	1104	Purchase - Order.exe	Purchase - Order.exe

pid	process
640	schtasks.exe

pid	process
1760	Purchase - Order.exe
1760	Purchase - Order.exe

description	pid	process
Token: SeDebugPrivilege	1760	Purchase - Order.exe

pid	process
1760	Purchase - Order.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

Purchase - Order.exe

description	pid	process	target process
PID 1104 wrote to memory of 640	1104	Purchase - Order.exe	schtasks.exe
PID 1104 wrote to memory of 640	1104	Purchase - Order.exe	schtasks.exe
PID 1104 wrote to memory of 640	1104	Purchase - Order.exe	schtasks.exe
PID 1104 wrote to memory of 640	1104	Purchase - Order.exe	schtasks.exe
PID 1104 wrote to memory of 1760	1104	Purchase - Order.exe	Purchase - Order.exe
PID 1104 wrote to memory of 1760	1104	Purchase - Order.exe	Purchase - Order.exe
PID 1104 wrote to memory of 1760	1104	Purchase - Order.exe	Purchase - Order.exe
PID 1104 wrote to memory of 1760	1104	Purchase - Order.exe	Purchase - Order.exe
PID 1104 wrote to memory of 1760	1104	Purchase - Order.exe	Purchase - Order.exe
PID 1104 wrote to memory of 1760	1104	Purchase - Order.exe	Purchase - Order.exe
PID 1104 wrote to memory of 1760	1104	Purchase - Order.exe	Purchase - Order.exe
PID 1104 wrote to memory of 1760	1104	Purchase - Order.exe	Purchase - Order.exe
PID 1104 wrote to memory of 1760	1104	Purchase - Order.exe	Purchase - Order.exe

C:\Users\Admin\AppData\Local\Temp\Purchase - Order.exe
"C:\Users\Admin\AppData\Local\Temp\Purchase - Order.exe"
1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1104

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\wzqcOpgNYsw" /XML "C:\Users\Admin\AppData\Local\Temp\tmp566A.tmp"
2⤵
- Creates scheduled task(s)
PID:640

C:\Users\Admin\AppData\Local\Temp\Purchase - Order.exe
"{path}"
2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:1760

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

1

T1060

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Modify Registry

1

T1112

Credential Access

Credentials in Files

3

T1081

Discovery

Query Registry

4

T1012

Virtualization/Sandbox Evasion

2

T1497

System Information Discovery

3

T1082

Peripheral Device Discovery

1

T1120

Lateral Movement

Collection

Data from Local System

3

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp566A.tmp
MD5
0ad1d2322c48e0bb45ee13b0c1e86711

SHA1
2856249938811493d3a658f42f3d4e4bc718db8a

SHA256
a3b319d441420e6acae8b10d01a9b8483f7eef744296bc5f099d39f0da8f268d

SHA512
d71e9918c76381d9c5beeeb169f76ad86ff08ccbd03b03068d0caaf7b720ba0087aee93ff2af64753bae1fd8f5eb8904a861d891ab1154e2c428e7e326da7441

Download Submit
memory/640-65-0x0000000000000000-mapping.dmp

Download
memory/1104-59-0x0000000000F30000-0x0000000000F31000-memory.dmp

Filesize
4KB

Download
memory/1104-61-0x0000000004CA0000-0x0000000004CA1000-memory.dmp

Filesize
4KB

Download
memory/1104-62-0x00000000004F0000-0x00000000004F2000-memory.dmp

Filesize
8KB

Download
memory/1104-63-0x0000000007F30000-0x0000000007FB2000-memory.dmp

Filesize
520KB

Download
memory/1104-64-0x0000000004F80000-0x0000000004FBD000-memory.dmp

Filesize
244KB

Download
memory/1760-67-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/1760-68-0x000000000043784E-mapping.dmp

Download
memory/1760-69-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/1760-71-0x0000000000460000-0x0000000000461000-memory.dmp

Filesize
4KB

Download
memory/1760-72-0x0000000000461000-0x0000000000462000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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