agenttesla | a0b62fba8a452d3858c02abf004ba07ef1c75409e925c724801d8f8552f4f5ae

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
04-12-2024 14:42

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General

Target

PO.exe
Size

600KB
MD5

52131cce80de6868d4eb452ec3bcb91b
SHA1

4ce48ce0ac577aa4008359cc9178dfb1e9e95f25
SHA256

935cbed36f8d1f6e18a988bc200c075039f4dc6ffb1a87e1a72c9f8b393fe4fa
SHA512

88203976f238dc1f93c2bfa7ac255f77755bf0b692f45631d9e7ccc853ef89b8c1d3ddfd0fe86978409bee0f81ac03c81c11757ed2deadb29b3f4b495a1680bc
SSDEEP

12288:tHadcxTcho0xSH0dgsK4lU7MMJtkbgPtYDoZ:VadhaNUdgPsqJtkIYDoZ

Score

10^/10

agenttesla guloader discovery downloader keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: ftp
Host:
ftp://ftp.concaribe.com
Port:
21
Username:
[email protected]
Password:
ro}UWgz#!38E

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
Agenttesla family
agenttesla
Guloader family
guloader
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Loads dropped DLL 2 IoCs

pid	Process
5080	PO.exe
5080	PO.exe

Reads WinSCP keys stored on the system 2 TTPs
Tries to access WinSCP stored sessions.
spyware stealer

Data from Local System
T1005

Credentials in Registry
T1552.002
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
T1552.001
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
T1552.001
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

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
19	api.ipify.org
20	api.ipify.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2164	PO.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
5080	PO.exe
2164	PO.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5080 set thread context of 2164	5080	PO.exe	83

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\Fonts\Optrevle23\sciolisms.lnk	PO.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PO.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PO.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2164	PO.exe
2164	PO.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
5080	PO.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2164	PO.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5080 wrote to memory of 2164	5080	PO.exe	83
PID 5080 wrote to memory of 2164	5080	PO.exe	83
PID 5080 wrote to memory of 2164	5080	PO.exe	83
PID 5080 wrote to memory of 2164	5080	PO.exe	83
PID 5080 wrote to memory of 2164	5080	PO.exe	83

C:\Users\Admin\AppData\Local\Temp\PO.exe
"C:\Users\Admin\AppData\Local\Temp\PO.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:5080
- C:\Users\Admin\AppData\Local\Temp\PO.exe
  "C:\Users\Admin\AppData\Local\Temp\PO.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2164

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Credentials in Registry

T1552.002

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\Microsoft\Windows\Start Menu\corruptive.ini

Filesize
41B

MD5
72aa3249175db3140ca2417e0d3734af

SHA1
26c42df76bae28052fe718345719d9c63c1d0ce5

SHA256
805937f3343642a10631ed3c4829f25ddfecb4ec9cb240d59c2bc8d57a9bfd83

SHA512
62b7380db3ddceb487c74400ae6640e4aecbafbbfd9b5d30766eb14e04b968220a739d5e951edc9d40ee649d2aee7159258095d49a75e62890211fb64bd9fe59

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsn8CD1.tmp\System.dll

Filesize
12KB

MD5
192639861e3dc2dc5c08bb8f8c7260d5

SHA1
58d30e460609e22fa0098bc27d928b689ef9af78

SHA256
23d618a0293c78ce00f7c6e6dd8b8923621da7dd1f63a070163ef4c0ec3033d6

SHA512
6e573d8b2ef6ed719e271fd0b2fd9cd451f61fc9a9459330108d6d7a65a0f64016303318cad787aa1d5334ba670d8f1c7c13074e1be550b4a316963ecc465cdc

Download Submit
memory/2164-24-0x0000000000490000-0x00000000004D2000-memory.dmp

Filesize
264KB

Download
memory/2164-29-0x0000000038250000-0x000000003825A000-memory.dmp

Filesize
40KB

Download
memory/2164-28-0x0000000038180000-0x0000000038212000-memory.dmp

Filesize
584KB

Download
memory/2164-27-0x0000000038130000-0x0000000038180000-memory.dmp

Filesize
320KB

Download
memory/2164-26-0x0000000037800000-0x0000000037866000-memory.dmp

Filesize
408KB

Download
memory/2164-25-0x00000000370E0000-0x0000000037684000-memory.dmp

Filesize
5.6MB

Download
memory/2164-23-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/5080-18-0x00000000030A0000-0x000000000629E000-memory.dmp

Filesize
50.0MB

Download
memory/5080-22-0x00000000030A0000-0x000000000629E000-memory.dmp

Filesize
50.0MB

Download
memory/5080-21-0x00000000750A5000-0x00000000750A6000-memory.dmp

Filesize
4KB

Download
memory/5080-20-0x0000000077C01000-0x0000000077D21000-memory.dmp

Filesize
1.1MB

Download
memory/5080-19-0x0000000077C01000-0x0000000077D21000-memory.dmp

Filesize
1.1MB

Download
memory/5080-17-0x00000000030A0000-0x000000000629E000-memory.dmp

Filesize
50.0MB

Download