agenttesla | 5988d11b83423cfd48d121732e165533443e8a5186bc83ff79659608c358559a

General

Target

vbc.exe
Size

677KB
MD5

3050dad5399374e22b0f70c92c58be91
SHA1

55deeefcb19f2584248deaa0c7a53fc8fbcb55d7
SHA256

5988d11b83423cfd48d121732e165533443e8a5186bc83ff79659608c358559a
SHA512

d7b3c9a600b4d58e70de26ac36b9bce61364045ef75a5fb61706c15e58fbd7e3002897ee69d625a051fc29dc35ecd82a268c7f8c45e2436575fc7c37fb693182
SSDEEP

12288:y2TlEYAcN8pPgOJwCCvfXsJH3LzVkib6RzNOU5qNV+:NzGYOJwCCnXIWDhqNo

Score

10^/10

agenttesla redline collection infostealer keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
us2.smtp.mailhostbox.com
Port:
587
Username:
[email protected]
Password:
kV$bSqJ1 daniel
Email To:
[email protected]

Signatures

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

Detects Redline Stealer samples 2 IoCs

This rule detects the presence of Redline Stealer samples based on their unique strings.

stealer

resource	yara_rule
behavioral2/memory/2524-148-0x0000000004EF0000-0x0000000004F56000-memory.dmp	redline_stealer
behavioral2/memory/2524-152-0x0000000006540000-0x0000000006702000-memory.dmp	redline_stealer

RedLine
RedLine Stealer is a malware family written in C#, first appearing in early 2020.
infostealer redline

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Control Panel\International\Geo\Nation	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-1-5-21-2805025096-2326403612-4231045514-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	vbc.exe
Key opened	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	vbc.exe
Key opened	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\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-1-5-21-2805025096-2326403612-4231045514-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcWPrHZ = "C:\\Users\\Admin\\AppData\\Roaming\\gcWPrHZ\\gcWPrHZ.exe"	vbc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2820 set thread context of 2524	2820	vbc.exe	82

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

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
1840	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2820	vbc.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2820	vbc.exe
Token: SeDebugPrivilege	2524	vbc.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2820 wrote to memory of 1840	2820	vbc.exe	80
PID 2820 wrote to memory of 1840	2820	vbc.exe	80
PID 2820 wrote to memory of 1840	2820	vbc.exe	80
PID 2820 wrote to memory of 2524	2820	vbc.exe	82
PID 2820 wrote to memory of 2524	2820	vbc.exe	82
PID 2820 wrote to memory of 2524	2820	vbc.exe	82
PID 2820 wrote to memory of 2524	2820	vbc.exe	82
PID 2820 wrote to memory of 2524	2820	vbc.exe	82
PID 2820 wrote to memory of 2524	2820	vbc.exe	82
PID 2820 wrote to memory of 2524	2820	vbc.exe	82
PID 2820 wrote to memory of 2524	2820	vbc.exe	82

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	vbc.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\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⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2820
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\XHdAzTo" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9788.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1840
- C:\Users\Admin\AppData\Local\Temp\vbc.exe
  "{path}"
  2⤵
  - Accesses Microsoft Outlook profiles
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:2524

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

Scripting

Persistence

Registry Run Keys / Startup Folder

Scheduled Task

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

Scripting

Credential Access

Credentials in Files

3

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\vbc.exe.log

Filesize
1KB

MD5
17573558c4e714f606f997e5157afaac

SHA1
13e16e9415ceef429aaf124139671ebeca09ed23

SHA256
c18db6aecad2436da4a63ff26af4e3a337cca48f01c21b8db494fe5ccc60e553

SHA512
f4edf13f05a0d142e4dd42802098c8c44988ee8869621a62c2b565a77c9a95857f636583ff8d6d9baa366603d98b9bfbf1fc75bc6f9f8f83c80cb1215b2941cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp9788.tmp

Filesize
1KB

MD5
deb6bd970bb8f4e06c6e28c2033121e1

SHA1
085e05d0e8d73a0c2793df56709224bed89fc137

SHA256
dd9f2cbde64248dca86d47b801b983eeb59de42310cd713691100bb76592594d

SHA512
0c9a622e6627b8db4898216ba53c010779fea53482ec990bd42c9634bc96504cc57375a1a0a4f2637b317a2e59ee92d9df0eca8b3684fe0c62035c0c88d67bf9

Download Submit
memory/2524-148-0x0000000004EF0000-0x0000000004F56000-memory.dmp

Filesize
408KB

Download
memory/2524-144-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2524-152-0x0000000006540000-0x0000000006702000-memory.dmp

Filesize
1.8MB

Download
memory/2524-151-0x0000000006200000-0x0000000006250000-memory.dmp

Filesize
320KB

Download
memory/2524-149-0x0000000004EE0000-0x0000000004EF0000-memory.dmp

Filesize
64KB

Download
memory/2524-147-0x0000000004EE0000-0x0000000004EF0000-memory.dmp

Filesize
64KB

Download
memory/2820-139-0x00000000053E0000-0x00000000053F0000-memory.dmp

Filesize
64KB

Download
memory/2820-135-0x0000000005900000-0x0000000005EA4000-memory.dmp

Filesize
5.6MB

Download
memory/2820-134-0x0000000005260000-0x00000000052FC000-memory.dmp

Filesize
624KB

Download
memory/2820-140-0x00000000053E0000-0x00000000053F0000-memory.dmp

Filesize
64KB

Download
memory/2820-133-0x0000000000840000-0x00000000008F0000-memory.dmp

Filesize
704KB

Download
memory/2820-136-0x00000000053F0000-0x0000000005482000-memory.dmp

Filesize
584KB

Download
memory/2820-138-0x0000000005580000-0x00000000055D6000-memory.dmp

Filesize
344KB

Download
memory/2820-137-0x0000000005330000-0x000000000533A000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads