agenttesla | 910ecf3640d41c346a662f73d2e695e3a4331d9e910fcfc5838587239895018d

General

Target

20200603_PO_97890_EXPORTFCLpdf.exe
Size

454KB
MD5

73eff0ef28208f340480056565e52406
SHA1

6c97fd2aeaf672b55306147ed028c4ba044287c6
SHA256

c34a5fb5cb1ee666b5a59c8fd67368b2b3f826b3b8ed19e597dc8beb91416c52
SHA512

7277bd32980e6822b846f986c7e3c648443034d840463148d66b4ac8e169ecee64ae1444571da4a440c0f296fe36c9506512bc986393074539d2c45a2c3c1270

Score

10^/10

agenttesla evasion keylogger rezer0 spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.sesan.com.vn
Port:
587
Username:
info@sesan.com.vn
Password:
123456

Signatures

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

AgentTesla Payload 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/432-63-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/432-64-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/432-65-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/432-66-0x000000000044CBDE-mapping.dmp	family_agenttesla
behavioral1/memory/432-68-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla

Looks for VirtualBox Guest Additions in registry 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

ReZer0 packer 1 IoCs

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

rezer0

Processes:

resource	yara_rule
behavioral1/memory/1688-57-0x0000000001EF0000-0x0000000001F48000-memory.dmp	rezer0

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:

20200603_PO_97890_EXPORTFCLpdf.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	20200603_PO_97890_EXPORTFCLpdf.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	20200603_PO_97890_EXPORTFCLpdf.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:

20200603_PO_97890_EXPORTFCLpdf.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	20200603_PO_97890_EXPORTFCLpdf.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	20200603_PO_97890_EXPORTFCLpdf.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

20200603_PO_97890_EXPORTFCLpdf.exe

description pid process target process

PID 1688 set thread context of 432 1688 20200603_PO_97890_EXPORTFCLpdf.exe 20200603_PO_97890_EXPORTFCLpdf.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

2020 schtasks.exe

description	pid	process	target process
PID 1688 set thread context of 432	1688	20200603_PO_97890_EXPORTFCLpdf.exe	20200603_PO_97890_EXPORTFCLpdf.exe

pid	process
2020	schtasks.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

20200603_PO_97890_EXPORTFCLpdf.exe

description	pid	process	target process
PID 1688 wrote to memory of 2020	1688	20200603_PO_97890_EXPORTFCLpdf.exe	schtasks.exe
PID 1688 wrote to memory of 2020	1688	20200603_PO_97890_EXPORTFCLpdf.exe	schtasks.exe
PID 1688 wrote to memory of 2020	1688	20200603_PO_97890_EXPORTFCLpdf.exe	schtasks.exe
PID 1688 wrote to memory of 2020	1688	20200603_PO_97890_EXPORTFCLpdf.exe	schtasks.exe
PID 1688 wrote to memory of 432	1688	20200603_PO_97890_EXPORTFCLpdf.exe	20200603_PO_97890_EXPORTFCLpdf.exe
PID 1688 wrote to memory of 432	1688	20200603_PO_97890_EXPORTFCLpdf.exe	20200603_PO_97890_EXPORTFCLpdf.exe
PID 1688 wrote to memory of 432	1688	20200603_PO_97890_EXPORTFCLpdf.exe	20200603_PO_97890_EXPORTFCLpdf.exe
PID 1688 wrote to memory of 432	1688	20200603_PO_97890_EXPORTFCLpdf.exe	20200603_PO_97890_EXPORTFCLpdf.exe
PID 1688 wrote to memory of 432	1688	20200603_PO_97890_EXPORTFCLpdf.exe	20200603_PO_97890_EXPORTFCLpdf.exe
PID 1688 wrote to memory of 432	1688	20200603_PO_97890_EXPORTFCLpdf.exe	20200603_PO_97890_EXPORTFCLpdf.exe
PID 1688 wrote to memory of 432	1688	20200603_PO_97890_EXPORTFCLpdf.exe	20200603_PO_97890_EXPORTFCLpdf.exe
PID 1688 wrote to memory of 432	1688	20200603_PO_97890_EXPORTFCLpdf.exe	20200603_PO_97890_EXPORTFCLpdf.exe
PID 1688 wrote to memory of 432	1688	20200603_PO_97890_EXPORTFCLpdf.exe	20200603_PO_97890_EXPORTFCLpdf.exe

C:\Users\Admin\AppData\Local\Temp\20200603_PO_97890_EXPORTFCLpdf.exe
"C:\Users\Admin\AppData\Local\Temp\20200603_PO_97890_EXPORTFCLpdf.exe"
1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1688

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\RRWlmmsFeghNI" /XML "C:\Users\Admin\AppData\Local\Temp\tmp6CA9.tmp"
2⤵
- Creates scheduled task(s)
PID:2020

C:\Users\Admin\AppData\Local\Temp\20200603_PO_97890_EXPORTFCLpdf.exe
"{path}"
2⤵
PID:432

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

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Discovery

Query Registry

4

T1012

Virtualization/Sandbox Evasion

2

T1497

System Information Discovery

3

T1082

Peripheral Device Discovery

1

T1120

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp6CA9.tmp
Filesize
1KB

MD5
41620b81f47e832fe749779f9bd69c02

SHA1
ac93ba2739b6823901df92394e08243079337876

SHA256
a49e084a52951b1023d55f556f29e52356e290a23406eeaa34db0dd85775afca

SHA512
4b99478df5b5a194b3c40513c153258490346d465723e7397b9fde2818acad284dc19fb678e1401c66e075f854e43c66ea6bec7b75fa1c7044561c0854682e71

Download Submit
memory/432-64-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/432-60-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/432-61-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/432-63-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/432-65-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/432-66-0x000000000044CBDE-mapping.dmp

Download
memory/432-68-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1688-56-0x0000000000660000-0x0000000000668000-memory.dmp

Filesize
32KB

Download
memory/1688-57-0x0000000001EF0000-0x0000000001F48000-memory.dmp

Filesize
352KB

Download
memory/1688-55-0x0000000075E31000-0x0000000075E33000-memory.dmp

Filesize
8KB

Download
memory/1688-54-0x0000000000020000-0x0000000000098000-memory.dmp

Filesize
480KB

Download
memory/2020-58-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads