agenttesla | e0ec5ab404593520f98d17976acc233909af7784ea750cd2115d71eccb0b9ace

General

Target

KOSTAL.exe
Size

624KB
MD5

18e749290158ac34ad6ec1edcbf8ef01
SHA1

5826bddad06961fc3ea9e4c02069ea486cd7a499
SHA256

e0ec5ab404593520f98d17976acc233909af7784ea750cd2115d71eccb0b9ace
SHA512

18852268da231e15d1a00e07b4ca3abf262ba584986193b47390c0df95161193a806438cf794090d854520c9ecd480b23a9e3e2d77e4fc1d5d8f9741f577c06a

Score

10^/10

agenttesla keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
smtp.psbusinesparks.com
Port:
587
Username:
[email protected]
Password:
Alterative432

Signatures

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

AgentTesla Payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2712-13-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral2/memory/2712-14-0x00000000004374EE-mapping.dmp	family_agenttesla

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware

Data from Local System
T1005

Credentials in Files
T1081
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

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware

Data from Local System
T1005

Credentials in Files
T1081
Suspicious use of SetThreadContext 1 IoCs

Processes:

KOSTAL.exe

description pid process target process

PID 4048 set thread context of 2712 4048 KOSTAL.exe KOSTAL.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

KOSTAL.exe

pid process

2712 KOSTAL.exe
2712 KOSTAL.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

KOSTAL.exeKOSTAL.exe

description pid process

Token: SeDebugPrivilege 4048 KOSTAL.exe
Token: SeDebugPrivilege 2712 KOSTAL.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

KOSTAL.exe

pid process

2712 KOSTAL.exe

description	pid	process	target process
PID 4048 set thread context of 2712	4048	KOSTAL.exe	KOSTAL.exe

pid	process
2712	KOSTAL.exe
2712	KOSTAL.exe

description	pid	process
Token: SeDebugPrivilege	4048	KOSTAL.exe
Token: SeDebugPrivilege	2712	KOSTAL.exe

pid	process
2712	KOSTAL.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

KOSTAL.exe

description	pid	process	target process
PID 4048 wrote to memory of 2712	4048	KOSTAL.exe	KOSTAL.exe
PID 4048 wrote to memory of 2712	4048	KOSTAL.exe	KOSTAL.exe
PID 4048 wrote to memory of 2712	4048	KOSTAL.exe	KOSTAL.exe
PID 4048 wrote to memory of 2712	4048	KOSTAL.exe	KOSTAL.exe
PID 4048 wrote to memory of 2712	4048	KOSTAL.exe	KOSTAL.exe
PID 4048 wrote to memory of 2712	4048	KOSTAL.exe	KOSTAL.exe
PID 4048 wrote to memory of 2712	4048	KOSTAL.exe	KOSTAL.exe
PID 4048 wrote to memory of 2712	4048	KOSTAL.exe	KOSTAL.exe

C:\Users\Admin\AppData\Local\Temp\KOSTAL.exe
"C:\Users\Admin\AppData\Local\Temp\KOSTAL.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4048

C:\Users\Admin\AppData\Local\Temp\KOSTAL.exe
"C:\Users\Admin\AppData\Local\Temp\KOSTAL.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:2712

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

3

T1081

Discovery

Lateral Movement

Collection

Data from Local System

3

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\KOSTAL.exe.log
MD5
90acfd72f14a512712b1a7380c0faf60

SHA1
40ba4accb8faa75887e84fb8e38d598dc8cf0f12

SHA256
20806822f0c130b340504132c1461b589261fbbc518e468f4f90733ab514cb86

SHA512
29dbf85e14e60868574cb4dc9bda83d3c229fb956733d8d2557f2475ee0e690ac9c2e72f31e02284996da6906ba2dbfa382a29b04c15a2406571d8ee19ad16b9

Download Submit
memory/2712-13-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/2712-26-0x0000000005471000-0x0000000005472000-memory.dmp

Filesize
4KB

Download
memory/2712-23-0x0000000005E80000-0x0000000005E81000-memory.dmp

Filesize
4KB

Download
memory/2712-22-0x0000000005250000-0x0000000005251000-memory.dmp

Filesize
4KB

Download
memory/2712-20-0x0000000005470000-0x0000000005471000-memory.dmp

Filesize
4KB

Download
memory/2712-16-0x0000000073820000-0x0000000073F0E000-memory.dmp

Filesize
6.9MB

Download
memory/2712-14-0x00000000004374EE-mapping.dmp

Download
memory/4048-7-0x00000000053F0000-0x00000000053F1000-memory.dmp

Filesize
4KB

Download
memory/4048-12-0x00000000060A0000-0x0000000006108000-memory.dmp

Filesize
416KB

Download
memory/4048-11-0x0000000005510000-0x0000000005513000-memory.dmp

Filesize
12KB

Download
memory/4048-10-0x0000000005530000-0x0000000005531000-memory.dmp

Filesize
4KB

Download
memory/4048-9-0x0000000005600000-0x0000000005601000-memory.dmp

Filesize
4KB

Download
memory/4048-8-0x00000000052D0000-0x00000000052D1000-memory.dmp

Filesize
4KB

Download
memory/4048-2-0x0000000073820000-0x0000000073F0E000-memory.dmp

Filesize
6.9MB

Download
memory/4048-6-0x00000000058F0000-0x00000000058F1000-memory.dmp

Filesize
4KB

Download
memory/4048-5-0x0000000005350000-0x0000000005351000-memory.dmp

Filesize
4KB

Download
memory/4048-3-0x0000000000A10000-0x0000000000A11000-memory.dmp

Filesize
4KB

Download

Analysis

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