agenttesla | a8e2763fc5d8ea1e327bcfcbdcfb3bb96dcf4c7b1e33f96edda1cfc8a0719f68

General

Target

Sc_21121001111_pdf.exe
Size

646KB
MD5

7ccb2afaa6bad0e89349543ba4cd56b7
SHA1

03f817631c71445a805e5d6cfd6d227e99607ca4
SHA256

013d92479d88b8e1c76b764f9362e1c101481b6c26ac40dacec77b7910ec7344
SHA512

4ab77e38298ba13a2b60c80925ea99b880a61a7e24b8d53641b3e4095bd6d7199018ce28deb2400635138e4d074e861e26df45145e7dd33ef86f52b1bbc795c9

Score

10^/10

agenttesla collection evasion keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
smtp.yandex.com
Port:
587
Username:
[email protected]
Password:
blessing2020

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/304-63-0x0000000000400000-0x0000000000466000-memory.dmp	family_agenttesla
behavioral1/memory/304-64-0x0000000000400000-0x0000000000466000-memory.dmp	family_agenttesla
behavioral1/memory/304-65-0x0000000000400000-0x0000000000466000-memory.dmp	family_agenttesla
behavioral1/memory/304-66-0x000000000046115E-mapping.dmp	family_agenttesla
behavioral1/memory/304-70-0x0000000000400000-0x0000000000466000-memory.dmp	family_agenttesla
behavioral1/memory/304-68-0x0000000000400000-0x0000000000466000-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:

Sc_21121001111_pdf.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Sc_21121001111_pdf.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Sc_21121001111_pdf.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:

Sc_21121001111_pdf.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	Sc_21121001111_pdf.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Sc_21121001111_pdf.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Sc_21121001111_pdf.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:

Sc_21121001111_pdf.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	Sc_21121001111_pdf.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	Sc_21121001111_pdf.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

Sc_21121001111_pdf.exe

description pid process target process

PID 1904 set thread context of 304 1904 Sc_21121001111_pdf.exe Sc_21121001111_pdf.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

2000 schtasks.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

Sc_21121001111_pdf.exeSc_21121001111_pdf.exe

pid process

1904 Sc_21121001111_pdf.exe
1904 Sc_21121001111_pdf.exe
304 Sc_21121001111_pdf.exe
304 Sc_21121001111_pdf.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Sc_21121001111_pdf.exeSc_21121001111_pdf.exe

description pid process

Token: SeDebugPrivilege 1904 Sc_21121001111_pdf.exe
Token: SeDebugPrivilege 304 Sc_21121001111_pdf.exe

description	pid	process	target process
PID 1904 set thread context of 304	1904	Sc_21121001111_pdf.exe	Sc_21121001111_pdf.exe

pid	process
2000	schtasks.exe

pid	process
1904	Sc_21121001111_pdf.exe
1904	Sc_21121001111_pdf.exe
304	Sc_21121001111_pdf.exe
304	Sc_21121001111_pdf.exe

description	pid	process
Token: SeDebugPrivilege	1904	Sc_21121001111_pdf.exe
Token: SeDebugPrivilege	304	Sc_21121001111_pdf.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

Sc_21121001111_pdf.exe

description	pid	process	target process
PID 1904 wrote to memory of 2000	1904	Sc_21121001111_pdf.exe	schtasks.exe
PID 1904 wrote to memory of 2000	1904	Sc_21121001111_pdf.exe	schtasks.exe
PID 1904 wrote to memory of 2000	1904	Sc_21121001111_pdf.exe	schtasks.exe
PID 1904 wrote to memory of 2000	1904	Sc_21121001111_pdf.exe	schtasks.exe
PID 1904 wrote to memory of 304	1904	Sc_21121001111_pdf.exe	Sc_21121001111_pdf.exe
PID 1904 wrote to memory of 304	1904	Sc_21121001111_pdf.exe	Sc_21121001111_pdf.exe
PID 1904 wrote to memory of 304	1904	Sc_21121001111_pdf.exe	Sc_21121001111_pdf.exe
PID 1904 wrote to memory of 304	1904	Sc_21121001111_pdf.exe	Sc_21121001111_pdf.exe
PID 1904 wrote to memory of 304	1904	Sc_21121001111_pdf.exe	Sc_21121001111_pdf.exe
PID 1904 wrote to memory of 304	1904	Sc_21121001111_pdf.exe	Sc_21121001111_pdf.exe
PID 1904 wrote to memory of 304	1904	Sc_21121001111_pdf.exe	Sc_21121001111_pdf.exe
PID 1904 wrote to memory of 304	1904	Sc_21121001111_pdf.exe	Sc_21121001111_pdf.exe
PID 1904 wrote to memory of 304	1904	Sc_21121001111_pdf.exe	Sc_21121001111_pdf.exe

outlook_office_path 1 IoCs

Processes:

Sc_21121001111_pdf.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	Sc_21121001111_pdf.exe

outlook_win_path 1 IoCs

Processes:

Sc_21121001111_pdf.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	Sc_21121001111_pdf.exe

C:\Users\Admin\AppData\Local\Temp\Sc_21121001111_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Sc_21121001111_pdf.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:1904

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\gJwVOjpzjYgn" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7273.tmp"
2⤵
- Creates scheduled task(s)
PID:2000

C:\Users\Admin\AppData\Local\Temp\Sc_21121001111_pdf.exe
"{path}"
2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:304

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

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

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp7273.tmp
Filesize
1KB

MD5
227494cee750c2d565f4b6e0791d9233

SHA1
e2e541c6db2145cf4e1868104ac199626f9d77f8

SHA256
b6b75e7fec982a587939a447ed4a42d23bee5a1ea160565f1da6e2ae015b7221

SHA512
5e74a9427f3e9803b8f6af0d55e74e633667a13c81d2ff4d11543c830c30403bd168a4b7c486d000b57568a1e730f8648e79f6d5eae84c711854e0d0828fc9c1

Download Submit
memory/304-64-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/304-66-0x000000000046115E-mapping.dmp

Download
memory/304-71-0x0000000074F91000-0x0000000074F93000-memory.dmp

Filesize
8KB

Download
memory/304-68-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/304-70-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/304-60-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/304-61-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/304-63-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/304-65-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/1904-54-0x0000000000DC0000-0x0000000000E68000-memory.dmp

Filesize
672KB

Download
memory/1904-56-0x0000000005100000-0x0000000005190000-memory.dmp

Filesize
576KB

Download
memory/1904-55-0x00000000001E0000-0x00000000001EC000-memory.dmp

Filesize
48KB

Download
memory/1904-57-0x0000000004650000-0x00000000046CC000-memory.dmp

Filesize
496KB

Download
memory/2000-58-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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