agenttesla | c46ee625d9626c6583f1129a66c6044d50ae10ba95fec689e13646a0278afbe0

General

Target

BV10013(Rev A).scr
Size

656KB
MD5

208671e3fc9131fb1f9d0676d58ec5a8
SHA1

307bfd08bf763e3a8d099e9819b694aa8dfe945b
SHA256

1ac93b118f2f6facc20288611532e4f0f898967e262a6c9cea66bc2da07ad732
SHA512

a4bb8cd5ae82e6bce6cd8815dddc64c18b76c44725c3629666c08c08fde15ec4a96da7971b74aad2abebd7b40291dae8da3d6e969910cc39d807d2410f1e26f6

Score

10^/10

agenttesla collection evasion keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
smtp.gmail.com
Port:
587
Username:
[email protected]
Password:
z123456789ok

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/1360-64-0x0000000000400000-0x000000000045A000-memory.dmp	family_agenttesla
behavioral1/memory/1360-65-0x0000000000400000-0x000000000045A000-memory.dmp	family_agenttesla
behavioral1/memory/1360-66-0x0000000000400000-0x000000000045A000-memory.dmp	family_agenttesla
behavioral1/memory/1360-67-0x000000000045480E-mapping.dmp	family_agenttesla
behavioral1/memory/1360-69-0x0000000000400000-0x000000000045A000-memory.dmp	family_agenttesla
behavioral1/memory/1360-71-0x0000000000400000-0x000000000045A000-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:

BV10013(Rev A).scr

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	BV10013(Rev A).scr
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	BV10013(Rev A).scr

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

MSBuild.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.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:

BV10013(Rev A).scr

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	BV10013(Rev A).scr
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	BV10013(Rev A).scr

Suspicious use of SetThreadContext 1 IoCs

Processes:

BV10013(Rev A).scr

description pid process target process

PID 1380 set thread context of 1360 1380 BV10013(Rev A).scr MSBuild.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

1984 schtasks.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

MSBuild.exe

pid process

1360 MSBuild.exe
1360 MSBuild.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

MSBuild.exe

description pid process

Token: SeDebugPrivilege 1360 MSBuild.exe

description	pid	process	target process
PID 1380 set thread context of 1360	1380	BV10013(Rev A).scr	MSBuild.exe

pid	process
1984	schtasks.exe

pid	process
1360	MSBuild.exe
1360	MSBuild.exe

description	pid	process
Token: SeDebugPrivilege	1360	MSBuild.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

BV10013(Rev A).scr

description	pid	process	target process
PID 1380 wrote to memory of 1984	1380	BV10013(Rev A).scr	schtasks.exe
PID 1380 wrote to memory of 1984	1380	BV10013(Rev A).scr	schtasks.exe
PID 1380 wrote to memory of 1984	1380	BV10013(Rev A).scr	schtasks.exe
PID 1380 wrote to memory of 1984	1380	BV10013(Rev A).scr	schtasks.exe
PID 1380 wrote to memory of 1360	1380	BV10013(Rev A).scr	MSBuild.exe
PID 1380 wrote to memory of 1360	1380	BV10013(Rev A).scr	MSBuild.exe
PID 1380 wrote to memory of 1360	1380	BV10013(Rev A).scr	MSBuild.exe
PID 1380 wrote to memory of 1360	1380	BV10013(Rev A).scr	MSBuild.exe
PID 1380 wrote to memory of 1360	1380	BV10013(Rev A).scr	MSBuild.exe
PID 1380 wrote to memory of 1360	1380	BV10013(Rev A).scr	MSBuild.exe
PID 1380 wrote to memory of 1360	1380	BV10013(Rev A).scr	MSBuild.exe
PID 1380 wrote to memory of 1360	1380	BV10013(Rev A).scr	MSBuild.exe
PID 1380 wrote to memory of 1360	1380	BV10013(Rev A).scr	MSBuild.exe

outlook_office_path 1 IoCs

Processes:

MSBuild.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

outlook_win_path 1 IoCs

Processes:

MSBuild.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\BV10013(Rev A).scr
"C:\Users\Admin\AppData\Local\Temp\BV10013(Rev A).scr" /S
1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1380

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\jcRskZwAfnFf" /XML "C:\Users\Admin\AppData\Local\Temp\tmp63B3.tmp"
2⤵
- Creates scheduled task(s)
PID:1984

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:1360

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

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp63B3.tmp
Filesize
1KB

MD5
7479d25428a2d1ea7f1a17bbbfda8961

SHA1
ddd198065966ff03ad685977f79a7462d42a03e0

SHA256
02097e0d3f7dba7dc344eb75246ede063d15baa377b9f631d7feef7c86f640c9

SHA512
0ba9b2cfa6822830e691cabf81943fe7dd560a14242c634b715407e5e5eec1c8f482c50493b82d446c875a4176e3aa5d2305b9ed6446d16f5a8edd41cb6dc524

Download Submit
memory/1360-65-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/1360-66-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/1360-71-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/1360-69-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/1360-67-0x000000000045480E-mapping.dmp

Download
memory/1360-61-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/1360-62-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/1360-64-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/1380-54-0x00000000000B0000-0x000000000015A000-memory.dmp

Filesize
680KB

Download
memory/1380-55-0x0000000075871000-0x0000000075873000-memory.dmp

Filesize
8KB

Download
memory/1380-56-0x00000000002C0000-0x00000000002D2000-memory.dmp

Filesize
72KB

Download
memory/1380-58-0x0000000004D20000-0x0000000004D7A000-memory.dmp

Filesize
360KB

Download
memory/1380-57-0x0000000004480000-0x00000000044F4000-memory.dmp

Filesize
464KB

Download
memory/1984-59-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads