agenttesla | bebd0c5009a5b0b0a06fbe0020bd6f083ed90509771dbf1f8010e19e527bf464

Analysis

max time kernel
142s
max time network
135s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
17/05/2023, 08:49

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General

Target

vbc.exe
Size

267KB
MD5

9cf450fc0f69cccd0aa1e7059ff464c6
SHA1

b5eab54534e0465d243fd07cec0cfe9e2f1cd8b9
SHA256

bebd0c5009a5b0b0a06fbe0020bd6f083ed90509771dbf1f8010e19e527bf464
SHA512

d719450e3ae0ab4d7d8632cb566bdea00765e7b198f664af97323ec1a1f8898e20fd657402adb412bb4020d2c82335f6e3adf3b26402445a7a01c711b2a14ce1
SSDEEP

6144:PYa6CNNIp895RaWAYVpPq73EKdmQO9ND8YkY80qd5pq:PY8Nqp895Ra/aBq73boQO9l8YkLo

Score

10^/10

agenttesla collection keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

https://api.telegram.org/bot2134979594:AAFk4QkrlHlt2a-q-EhIoHZBbzxSH0QxiBI/

Signatures

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

Loads dropped DLL 1 IoCs

pid	Process
1696	vbc.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
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	vbc.exe
Key opened	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	vbc.exe
Key opened	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	vbc.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-1-5-21-1563773381-2037468142-1146002597-1000\Software\Microsoft\Windows\CurrentVersion\Run\yienjscxhqmvrb = "C:\\Users\\Admin\\AppData\\Roaming\\wclgplueajsox\\tdmirbwgbktp.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\vbc.exe\""	vbc.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
3	api.ipify.org
4	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1696 set thread context of 1004	1696	vbc.exe	27

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1696	vbc.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1004	vbc.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1696 wrote to memory of 1004	1696	vbc.exe	27
PID 1696 wrote to memory of 1004	1696	vbc.exe	27
PID 1696 wrote to memory of 1004	1696	vbc.exe	27
PID 1696 wrote to memory of 1004	1696	vbc.exe	27
PID 1696 wrote to memory of 1004	1696	vbc.exe	27

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	vbc.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	vbc.exe

C:\Users\Admin\AppData\Local\Temp\vbc.exe
"C:\Users\Admin\AppData\Local\Temp\vbc.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1696
- C:\Users\Admin\AppData\Local\Temp\vbc.exe
  "C:\Users\Admin\AppData\Local\Temp\vbc.exe"
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:1004

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scripting

T1064

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Scripting

T1064

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

\Users\Admin\AppData\Local\Temp\nsj4389.tmp\eiyhkfb.dll

Filesize
5KB

MD5
f7dadaebfec470c9004545feb704f34c

SHA1
4b362f96148f1fd18cb976b73397d8819931d019

SHA256
89c8dbf2830d48d084724fa232c3255f65c1eaabed3a483810a3c8643a6844b1

SHA512
f9f1143071ed63d03c03941de704bab83fd64cdc969dbc9aa3270a29ab5f80f74f4cf4fb69f08eac47027a1b9c6e8690f9e9c1d7dbca371cb0f61bf34ab8b60c

Download Submit
memory/1004-63-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/1004-65-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/1004-67-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/1004-68-0x0000000004570000-0x00000000045B0000-memory.dmp

Filesize
256KB

Download
memory/1004-69-0x0000000001D30000-0x0000000001D60000-memory.dmp

Filesize
192KB

Download
memory/1004-70-0x0000000004570000-0x00000000045B0000-memory.dmp

Filesize
256KB

Download
memory/1696-66-0x00000000003E0000-0x00000000003E3000-memory.dmp

Filesize
12KB

Download