agenttesla | 1f5c2366ec3def7b678b944431e78fdc1b8849a3736179a52061ffb9725a3c76

Analysis

max time kernel
295s
max time network
140s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
05-12-2024 14:01

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General

Target

PO.exe
Size

1.1MB
MD5

b9e43fb03b26fe314c298bc7e94f4d8c
SHA1

21e6ea3c8016b77a5e4e38b389c98168216ba882
SHA256

23e2a118c0a74c6a6e1c8a0750dfbe6109118443de35021389b683a14393fae4
SHA512

675a404ade77ddd2f8173f81812a985669c6f6755ff287867eed942918cd16edef4d2bcc72638adbcce5940f449c220761bdbbde5a0f64dad9d67191027cc166
SSDEEP

24576:HM05N3bjp8JvtuHsTWOnfdEtUKTTzXulTr:HMAuJvtTWOfWtzTTz+pr

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
2552	PO.exe
2552	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
5	api.ipify.org
6	api.ipify.org

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\usselryg.ini	PO.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2884	PO.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2552	PO.exe
2884	PO.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2552 set thread context of 2884	2552	PO.exe	32

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\penslet.Tyc241	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
2884	PO.exe
2884	PO.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2552	PO.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2884	PO.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2552 wrote to memory of 2884	2552	PO.exe	32
PID 2552 wrote to memory of 2884	2552	PO.exe	32
PID 2552 wrote to memory of 2884	2552	PO.exe	32
PID 2552 wrote to memory of 2884	2552	PO.exe	32
PID 2552 wrote to memory of 2884	2552	PO.exe	32
PID 2552 wrote to memory of 2884	2552	PO.exe	32

C:\Users\Admin\AppData\Local\Temp\PO.exe
"C:\Users\Admin\AppData\Local\Temp\PO.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2552
- 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:2884

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

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nstA1CD.tmp\System.dll

Filesize
11KB

MD5
fc90dfb694d0e17b013d6f818bce41b0

SHA1
3243969886d640af3bfa442728b9f0dff9d5f5b0

SHA256
7fe77ca13121a113c59630a3dba0c8aaa6372e8082393274da8f8608c4ce4528

SHA512
324f13aa7a33c6408e2a57c3484d1691ecee7c3c1366de2bb8978c8dc66b18425d8cab5a32d1702c13c43703e36148a022263de7166afdce141da2b01169f1c6

Download Submit
memory/2552-17-0x0000000003410000-0x00000000064E7000-memory.dmp

Filesize
48.8MB

Download
memory/2552-18-0x0000000003410000-0x00000000064E7000-memory.dmp

Filesize
48.8MB

Download
memory/2552-19-0x0000000077601000-0x0000000077702000-memory.dmp

Filesize
1.0MB

Download
memory/2552-20-0x0000000077600000-0x00000000777A9000-memory.dmp

Filesize
1.7MB

Download
memory/2552-22-0x0000000003410000-0x00000000064E7000-memory.dmp

Filesize
48.8MB

Download
memory/2884-21-0x0000000077600000-0x00000000777A9000-memory.dmp

Filesize
1.7MB

Download
memory/2884-23-0x00000000004D0000-0x0000000001532000-memory.dmp

Filesize
16.4MB

Download
memory/2884-24-0x00000000004D0000-0x0000000001532000-memory.dmp

Filesize
16.4MB

Download
memory/2884-25-0x00000000004D0000-0x0000000000512000-memory.dmp

Filesize
264KB

Download