agenttesla | 816c0f7e9fe03057d6ad0cbb7e93b97e3e5da9c508421b1e7ac6db3fd32e0ae7

General

Target

vbc.exe
Size

783KB
MD5

41c7bfc7333edd0ad3ede2cc7ef23ebe
SHA1

880b1892d082178a113b6af32d81339c0255d634
SHA256

816c0f7e9fe03057d6ad0cbb7e93b97e3e5da9c508421b1e7ac6db3fd32e0ae7
SHA512

f7577c933ff990627b7387a652e67aa39a959ad9176b2d7d4ac3e00967f5c77111fc3bb1d2a7c29dfbbad3f0be8b001852d00d5b4968173cd677df5eec8dd602

Score

10^/10

agenttesla agilenet collection keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
smtp.xxltrucck.com
Port:
587
Username:
[email protected]
Password:
vFguU*i0

Signatures

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

AgentTesla Payload 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1300-63-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/1300-64-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/1300-65-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/1300-66-0x000000000043773E-mapping.dmp	family_agenttesla
behavioral1/memory/1300-69-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla

Drops file in Drivers directory 1 IoCs

Processes:

InstallUtil.exe

description ioc process

File opened for modification C:\Windows\system32\drivers\etc\hosts InstallUtil.exe
Executes dropped EXE 1 IoCs

Processes:

InstallUtil.exe

pid process

1300 InstallUtil.exe
Loads dropped DLL 1 IoCs

Processes:

vbc.exe

pid process

1088 vbc.exe

description	ioc	process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	InstallUtil.exe

pid	process
1300	InstallUtil.exe

pid	process
1088	vbc.exe

Obfuscated with Agile.Net obfuscator 1 IoCs

Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

agilenet

Processes:

resource	yara_rule
behavioral1/memory/1088-56-0x00000000003A0000-0x00000000003C1000-memory.dmp	agile_net

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

Processes:

InstallUtil.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	InstallUtil.exe
Key opened	\REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	InstallUtil.exe
Key opened	\REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	InstallUtil.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

vbc.exe

description pid process target process

PID 1088 set thread context of 1300 1088 vbc.exe InstallUtil.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

vbc.exeInstallUtil.exe

pid process

1088 vbc.exe
1088 vbc.exe
1300 InstallUtil.exe
1300 InstallUtil.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

vbc.exeInstallUtil.exe

description pid process

Token: SeDebugPrivilege 1088 vbc.exe
Token: SeDebugPrivilege 1300 InstallUtil.exe

description	pid	process	target process
PID 1088 set thread context of 1300	1088	vbc.exe	InstallUtil.exe

pid	process
1088	vbc.exe
1088	vbc.exe
1300	InstallUtil.exe
1300	InstallUtil.exe

description	pid	process
Token: SeDebugPrivilege	1088	vbc.exe
Token: SeDebugPrivilege	1300	InstallUtil.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

vbc.exe

description	pid	process	target process
PID 1088 wrote to memory of 1300	1088	vbc.exe	InstallUtil.exe
PID 1088 wrote to memory of 1300	1088	vbc.exe	InstallUtil.exe
PID 1088 wrote to memory of 1300	1088	vbc.exe	InstallUtil.exe
PID 1088 wrote to memory of 1300	1088	vbc.exe	InstallUtil.exe
PID 1088 wrote to memory of 1300	1088	vbc.exe	InstallUtil.exe
PID 1088 wrote to memory of 1300	1088	vbc.exe	InstallUtil.exe
PID 1088 wrote to memory of 1300	1088	vbc.exe	InstallUtil.exe
PID 1088 wrote to memory of 1300	1088	vbc.exe	InstallUtil.exe
PID 1088 wrote to memory of 1300	1088	vbc.exe	InstallUtil.exe
PID 1088 wrote to memory of 1300	1088	vbc.exe	InstallUtil.exe
PID 1088 wrote to memory of 1300	1088	vbc.exe	InstallUtil.exe
PID 1088 wrote to memory of 1300	1088	vbc.exe	InstallUtil.exe

outlook_office_path 1 IoCs

Processes:

InstallUtil.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	InstallUtil.exe

outlook_win_path 1 IoCs

Processes:

InstallUtil.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	InstallUtil.exe

C:\Users\Admin\AppData\Local\Temp\vbc.exe
"C:\Users\Admin\AppData\Local\Temp\vbc.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1088
- C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
  "C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"
  2⤵
  - Drops file in Drivers directory
  - Executes dropped EXE
  - Accesses Microsoft Outlook profiles
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:1300

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scripting

1

T1064

Persistence

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Credential Access

Credentials in Files

3

T1081

Discovery

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe

MD5
91c9ae9c9a17a9db5e08b120e668c74c

SHA1
50770954c1ceb0bb6f1d5d3f2de2a0a065773723

SHA256
e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

SHA512
ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

Download Submit
C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe

MD5
91c9ae9c9a17a9db5e08b120e668c74c

SHA1
50770954c1ceb0bb6f1d5d3f2de2a0a065773723

SHA256
e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

SHA512
ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

Download Submit
\Users\Admin\AppData\Local\Temp\InstallUtil.exe

MD5
91c9ae9c9a17a9db5e08b120e668c74c

SHA1
50770954c1ceb0bb6f1d5d3f2de2a0a065773723

SHA256
e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

SHA512
ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

Download Submit
memory/1088-58-0x00000000022B0000-0x00000000022BB000-memory.dmp

Filesize
44KB

Download
memory/1088-53-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download
memory/1088-59-0x0000000000750000-0x0000000000751000-memory.dmp

Filesize
4KB

Download
memory/1088-57-0x0000000002241000-0x0000000002242000-memory.dmp

Filesize
4KB

Download
memory/1088-55-0x0000000002240000-0x0000000002241000-memory.dmp

Filesize
4KB

Download
memory/1088-56-0x00000000003A0000-0x00000000003C1000-memory.dmp

Filesize
132KB

Download
memory/1300-64-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/1300-63-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/1300-65-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/1300-62-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/1300-66-0x000000000043773E-mapping.dmp

Download
memory/1300-61-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/1300-69-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/1300-71-0x0000000000480000-0x0000000000481000-memory.dmp

Filesize
4KB

Download
memory/1300-72-0x0000000000481000-0x0000000000482000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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