agenttesla | c737f9b2563773f7f36fb8e2b2d975289724d06414467d2383cf4a8e82ef119c

General

Target

Overdue invoices list.exe
Size

588KB
MD5

b0aa6256cf3923d4077b54ecbd91dea5
SHA1

328cdfcd943b424f3cc91e06616fa712dbbb55b9
SHA256

a00bf3e3e9ca1d19b7f2668d143036aad1391cd8da67789da9843d08a0520768
SHA512

f0879513b33e8bfeeec7569e1f1b830cc6a6dc39b27f5e53343804ebef52b087386accb1ca487df52c3fddb8307c250e767d67406c7f8a081ec7b0e8417ee730
SSDEEP

6144:1p+ggBLPYy0WIFc5dRajUy/R4D7O9wWhrPtq+wHtWQscAElBPg0fVjjXTtqKdyn8:rzNWI+HGK7+tq+gWQ/TlzVjP0Ne0zBDg

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
2544	Overdue invoices list.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
36	api.ipify.org
35	api.ipify.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1976	Overdue invoices list.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2544	Overdue invoices list.exe
1976	Overdue invoices list.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	Overdue invoices list.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Overdue invoices list.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1976	Overdue invoices list.exe
1976	Overdue invoices list.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2544	Overdue invoices list.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1976	Overdue invoices list.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2544 wrote to memory of 1976	2544	Overdue invoices list.exe	98
PID 2544 wrote to memory of 1976	2544	Overdue invoices list.exe	98
PID 2544 wrote to memory of 1976	2544	Overdue invoices list.exe	98
PID 2544 wrote to memory of 1976	2544	Overdue invoices list.exe	98

C:\Users\Admin\AppData\Local\Temp\Overdue invoices list.exe
"C:\Users\Admin\AppData\Local\Temp\Overdue invoices list.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2544
- C:\Users\Admin\AppData\Local\Temp\Overdue invoices list.exe
  "C:\Users\Admin\AppData\Local\Temp\Overdue invoices list.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1976

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\nsvC759.tmp\System.dll

Filesize
11KB

MD5
75ed96254fbf894e42058062b4b4f0d1

SHA1
996503f1383b49021eb3427bc28d13b5bbd11977

SHA256
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

SHA512
58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

Download Submit
memory/1976-26-0x0000000000490000-0x00000000004D2000-memory.dmp

Filesize
264KB

Download
memory/1976-24-0x00000000016F0000-0x00000000053D2000-memory.dmp

Filesize
60.9MB

Download
memory/1976-35-0x0000000073070000-0x0000000073820000-memory.dmp

Filesize
7.7MB

Download
memory/1976-34-0x000000007307E000-0x000000007307F000-memory.dmp

Filesize
4KB

Download
memory/1976-20-0x0000000077EB8000-0x0000000077EB9000-memory.dmp

Filesize
4KB

Download
memory/1976-21-0x0000000077ED5000-0x0000000077ED6000-memory.dmp

Filesize
4KB

Download
memory/1976-23-0x0000000077E31000-0x0000000077F51000-memory.dmp

Filesize
1.1MB

Download
memory/1976-22-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/1976-33-0x0000000038E40000-0x0000000038E4A000-memory.dmp

Filesize
40KB

Download
memory/1976-25-0x000000007307E000-0x000000007307F000-memory.dmp

Filesize
4KB

Download
memory/1976-19-0x00000000016F0000-0x00000000053D2000-memory.dmp

Filesize
60.9MB

Download
memory/1976-27-0x0000000037E60000-0x0000000038404000-memory.dmp

Filesize
5.6MB

Download
memory/1976-28-0x0000000037DD0000-0x0000000037E36000-memory.dmp

Filesize
408KB

Download
memory/1976-29-0x0000000073070000-0x0000000073820000-memory.dmp

Filesize
7.7MB

Download
memory/1976-31-0x0000000038D20000-0x0000000038D70000-memory.dmp

Filesize
320KB

Download
memory/1976-32-0x0000000038D70000-0x0000000038E02000-memory.dmp

Filesize
584KB

Download
memory/2544-18-0x0000000074A84000-0x0000000074A85000-memory.dmp

Filesize
4KB

Download
memory/2544-16-0x0000000077E31000-0x0000000077F51000-memory.dmp

Filesize
1.1MB

Download
memory/2544-17-0x0000000077E31000-0x0000000077F51000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing