agenttesla | 4c87baef6850203e490e688b78e07d764e2ad978676667ecb6fd07efdb579567

General

Target

PO.exe
Size

702KB
MD5

0d35c3156b03e29ad07d6cf268c394a8
SHA1

446e9ccdb3a54abeaac38e088352b18f09640f03
SHA256

e37762c1624d0c77270d82c7e305e09aa32a3e20f017c0f4205ecac150910c29
SHA512

3e68842c306509ec4ec1c49afa84bae9d0f62b924a777a2e09b6af1381c4af9b90597b212851693a58819b38439898533c73ea14fafdae11b2d146e217bc2279
SSDEEP

12288:/36reEVVY0bT1WP7r0AK8XsjMrNHJpqzERZndvK7QJskkf9B9epdk9fVO:/36rrVVY0bpWTr0AK88jEHJpqzUZngQr

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 1 IoCs

pid	Process
3192	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
12	api.ipify.org
13	api.ipify.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2932	PO.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3192	PO.exe
2932	PO.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\prediagnosis.ini	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
2932	PO.exe
2932	PO.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3192	PO.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2932	PO.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3192 wrote to memory of 2932	3192	PO.exe	88
PID 3192 wrote to memory of 2932	3192	PO.exe	88
PID 3192 wrote to memory of 2932	3192	PO.exe	88
PID 3192 wrote to memory of 2932	3192	PO.exe	88

C:\Users\Admin\AppData\Local\Temp\PO.exe
"C:\Users\Admin\AppData\Local\Temp\PO.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3192
- 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:2932

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

4

T1552

Credentials In Files

3

T1552.001

Credentials in Registry

1

T1552.002

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

4

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsm97AD.tmp\System.dll

Filesize
12KB

MD5
6e55a6e7c3fdbd244042eb15cb1ec739

SHA1
070ea80e2192abc42f358d47b276990b5fa285a9

SHA256
acf90ab6f4edc687e94aaf604d05e16e6cfb5e35873783b50c66f307a35c6506

SHA512
2d504b74da38edc967e3859733a2a9cacd885db82f0ca69bfb66872e882707314c54238344d45945dc98bae85772aceef71a741787922d640627d3c8ae8f1c35

Download Submit
memory/2932-26-0x0000000037020000-0x00000000375C4000-memory.dmp

Filesize
5.6MB

Download
memory/2932-22-0x0000000001A30000-0x0000000004624000-memory.dmp

Filesize
44.0MB

Download
memory/2932-23-0x00000000007D0000-0x0000000001A24000-memory.dmp

Filesize
18.3MB

Download
memory/2932-24-0x0000000001A30000-0x0000000004624000-memory.dmp

Filesize
44.0MB

Download
memory/2932-25-0x00000000007D0000-0x0000000000812000-memory.dmp

Filesize
264KB

Download
memory/2932-27-0x0000000034E90000-0x0000000034EF6000-memory.dmp

Filesize
408KB

Download
memory/2932-28-0x0000000037FB0000-0x0000000038000000-memory.dmp

Filesize
320KB

Download
memory/2932-29-0x0000000038000000-0x0000000038092000-memory.dmp

Filesize
584KB

Download
memory/2932-30-0x00000000380D0000-0x00000000380DA000-memory.dmp

Filesize
40KB

Download
memory/3192-18-0x0000000077731000-0x0000000077851000-memory.dmp

Filesize
1.1MB

Download
memory/3192-19-0x0000000074595000-0x0000000074596000-memory.dmp

Filesize
4KB

Download
memory/3192-21-0x00000000045B0000-0x00000000071A4000-memory.dmp

Filesize
44.0MB

Download
memory/3192-17-0x00000000045B0000-0x00000000071A4000-memory.dmp

Filesize
44.0MB

Download

Analysis

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