agenttesla | 635bd1a6aed07ec24ab3cef313535757da24d25a6525e0b172ac943ed43ecd55

General

Target

qcfk71.ps1
Size

883KB
MD5

59b52c8f84fe2c3ad0dbf846458a8b0e
SHA1

d0f7133d12e764781faf7c333f1ba115a7dc29ae
SHA256

635bd1a6aed07ec24ab3cef313535757da24d25a6525e0b172ac943ed43ecd55
SHA512

6a369dc696f5c7569bcf86e4e689985fd6ae21fdfd082da82a73c2647e046a5decb963d1864e5a5c891dee9e7b54480834004f83bc20413e48f6e6f7f8372106
SSDEEP

24576:CZPsiow8xKQ3FuIHIrR2D8+NyzIX6ynYyHPdZoo6ukNoTn1lhie:CZPs68xH8IHIrR48+N7X6crHV6LNoTnV

Score

10^/10

agenttesla discovery execution keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: ftp
Host:
ftp://ftp.antoniomayol.com:21
Port:
21
Username:
[email protected]
Password:
cMhKDQUk1{;%

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
2740	x.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 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
13	ip-api.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2740 set thread context of 2008	2740	x.exe	84

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
3160	powershell.exe

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	x.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3160	powershell.exe
3160	powershell.exe
2008	RegAsm.exe
2008	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3160	powershell.exe
Token: SeDebugPrivilege	2008	RegAsm.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3160 wrote to memory of 2740	3160	powershell.exe	83
PID 3160 wrote to memory of 2740	3160	powershell.exe	83
PID 3160 wrote to memory of 2740	3160	powershell.exe	83
PID 2740 wrote to memory of 2008	2740	x.exe	84
PID 2740 wrote to memory of 2008	2740	x.exe	84
PID 2740 wrote to memory of 2008	2740	x.exe	84
PID 2740 wrote to memory of 2008	2740	x.exe	84
PID 2740 wrote to memory of 2008	2740	x.exe	84
PID 2740 wrote to memory of 2008	2740	x.exe	84
PID 2740 wrote to memory of 2008	2740	x.exe	84
PID 2740 wrote to memory of 2008	2740	x.exe	84

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\qcfk71.ps1
1⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3160
- C:\Users\Admin\AppData\Local\Temp\x.exe
  "C:\Users\Admin\AppData\Local\Temp\x.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2740
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2008

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

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 Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

4

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vhgkzzfn.xbd.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
662KB

MD5
513d7de2ff3e34d7580856dc88a01215

SHA1
35693800547067d1250896f5b6c3baff65bda92c

SHA256
d9ad385b98fe6345d4637b53023afc442eeb5d2fd60290f5e880b70797afc193

SHA512
b05c9f2c703938e90a231cd2be432293dd8f980e35c9bd11be156f61954eca04b177052060e64dbed91e8cec42b1e3f9f8381f911e7bd669939838f1271ad68d

Download Submit
memory/2008-30-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2008-37-0x00000000068C0000-0x00000000068CA000-memory.dmp

Filesize
40KB

Download
memory/2008-36-0x0000000006930000-0x00000000069C2000-memory.dmp

Filesize
584KB

Download
memory/2008-35-0x0000000006840000-0x0000000006890000-memory.dmp

Filesize
320KB

Download
memory/2008-34-0x0000000005560000-0x00000000055C6000-memory.dmp

Filesize
408KB

Download
memory/2008-33-0x00000000058F0000-0x0000000005E94000-memory.dmp

Filesize
5.6MB

Download
memory/2740-28-0x00000000007D0000-0x000000000087C000-memory.dmp

Filesize
688KB

Download
memory/2740-29-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/2740-32-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/2740-26-0x000000007522E000-0x000000007522F000-memory.dmp

Filesize
4KB

Download
memory/3160-0-0x00007FFA7C2A3000-0x00007FFA7C2A5000-memory.dmp

Filesize
8KB

Download
memory/3160-27-0x00007FFA7C2A0000-0x00007FFA7CD61000-memory.dmp

Filesize
10.8MB

Download
memory/3160-12-0x00007FFA7C2A0000-0x00007FFA7CD61000-memory.dmp

Filesize
10.8MB

Download
memory/3160-11-0x00007FFA7C2A0000-0x00007FFA7CD61000-memory.dmp

Filesize
10.8MB

Download
memory/3160-1-0x0000020428750000-0x0000020428772000-memory.dmp

Filesize
136KB

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Analysis

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