agenttesla | 4b3b8f1f6ab69340cea4c78f21cb691e6efdb3ede2973a6315e947b281ea25c8

Analysis

max time kernel
75s
max time network
153s
platform
windows7_x64
resource
win7-20220414-en
submitted
09/05/2022, 03:23

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General

Target
SY.exe
Size 554KB
Sample220509-dxfx5afbbm
SHA256 4b3b8f1f6ab69340cea4c78f21cb691e6efdb3ede2973a6315e947b281ea25c8
MD5 a42e21f52fd1f78f98ba16a20ce311c4
SHA1 4060cd84567213393793efcd6179bff3e7280069
SHA512 d25149ec254b4eaaaf7af4d7fc123be02ff81c08cfc0e58729d5fbf6e1dcafc69f9b597430a8bad5408fb18fe9180600a39fbcefd193a9805310d38b23b19bec
MD5 SHA1 SHA512

Score

10^/10

agenttesla collection keylogger persistence spyware stealer suricata trojan

Malware Config

Extracted

Credentials

Protocol
smtp
Host
mail.ocenmasters.com
Port
587
Username
[email protected]
Password
donblack12345

Extracted

Family

agenttesla

Credentials

Protocol
smtp
Host
mail.ocenmasters.com
Port
587
Username
[email protected]
Password
donblack12345
Email to
[email protected]

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
suricata: ET MALWARE AgentTesla Exfil Via SMTP
suricata: ET MALWARE AgentTesla Exfil Via SMTP
suricata

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	SY.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

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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows\CurrentVersion\Run\yqWDN = "C:\\Users\\Admin\\AppData\\Roaming\\yqWDN\\yqWDN.exe"	SY.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1172 set thread context of 1156	1172	SY.exe	29

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

pid	Process
1332	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1172	SY.exe
1156	SY.exe
1156	SY.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1172	SY.exe
Token: SeDebugPrivilege	1156	SY.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1172 wrote to memory of 1332	1172	SY.exe	27
PID 1172 wrote to memory of 1332	1172	SY.exe	27
PID 1172 wrote to memory of 1332	1172	SY.exe	27
PID 1172 wrote to memory of 1332	1172	SY.exe	27
PID 1172 wrote to memory of 1156	1172	SY.exe	29
PID 1172 wrote to memory of 1156	1172	SY.exe	29
PID 1172 wrote to memory of 1156	1172	SY.exe	29
PID 1172 wrote to memory of 1156	1172	SY.exe	29
PID 1172 wrote to memory of 1156	1172	SY.exe	29
PID 1172 wrote to memory of 1156	1172	SY.exe	29
PID 1172 wrote to memory of 1156	1172	SY.exe	29
PID 1172 wrote to memory of 1156	1172	SY.exe	29
PID 1172 wrote to memory of 1156	1172	SY.exe	29

outlook_office_path 1 IoCs

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

outlook_win_path 1 IoCs

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	SY.exe

C:\Users\Admin\AppData\Local\Temp\SY.exe
"C:\Users\Admin\AppData\Local\Temp\SY.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1172
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\klklsqjln" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB665.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1332
- C:\Users\Admin\AppData\Local\Temp\SY.exe
  "{path}"
  2⤵
  - Drops file in Drivers directory
  - Accesses Microsoft Outlook profiles
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:1156

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

tmpB665.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpB665.tmp
Size 1KB
SHA256 1d947693e9f74fb536f7e98e2fc841b738bc9a69c6b03be1403f688f46a21e67
MD5 eed7ff0a77959fde91ec7d082192977a
SHA1 91baf3b680751d6d84a96574ae586c3a97b3a096
SHA512 10c6c2538c360780e2e9575b543265e17ad4589d66c9ec4dbda45ce927ea4b8e757f91a7a86c329df428d3ced10dcd9b9f8469c4e5d8797788f887004a7b6268
MD5 SHA1 SHA512

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memory/1156-64-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/1156-66-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/1156-71-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/1156-69-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/1156-65-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/1156-61-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/1156-62-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/1172-54-0x00000000011D0000-0x0000000001260000-memory.dmp

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memory/1172-55-0x0000000076191000-0x0000000076193000-memory.dmp

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memory/1172-56-0x00000000002D0000-0x00000000002DA000-memory.dmp

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memory/1172-58-0x0000000000FF0000-0x000000000102A000-memory.dmp

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memory/1172-57-0x00000000051F0000-0x0000000005274000-memory.dmp

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