agenttesla | 46dc49be65d7165e2a6009854a4f27f0088230199e61e0555cb1bd266535874a

Analysis

max time kernel
68s
max time network
87s
platform
windows10_x64
resource
win10v200722
submitted
11-08-2020 12:30

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General

Target

foo/406c9b9529109f835fe7292e6cf3fefe.exe

Score

10^/10

agenttesla keylogger persistence spyware stealer trojan

Malware Config

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
Executes dropped EXE 1 IoCs

Processes:

svhost.exe

pid process

576 svhost.exe
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

pid	process
576	svhost.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

svhost.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2168186643-810464528-1121082739-1000\Software\Microsoft\Windows\CurrentVersion\Run\MyOtApp = "C:\\Users\\Admin\\AppData\\Roaming\\MyOtApp\\MyOtApp.exe"	svhost.exe

Drops desktop.ini file(s) 2 IoCs

Processes:

406c9b9529109f835fe7292e6cf3fefe.exe

description	ioc	process
File created	C:\Windows\assembly\Desktop.ini	406c9b9529109f835fe7292e6cf3fefe.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	406c9b9529109f835fe7292e6cf3fefe.exe

Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

1 checkip.dyndns.org
Suspicious use of SetThreadContext 1 IoCs

Processes:

406c9b9529109f835fe7292e6cf3fefe.exe

description pid process target process

PID 992 set thread context of 576 992 406c9b9529109f835fe7292e6cf3fefe.exe svhost.exe

flow	ioc
1	checkip.dyndns.org

description	pid	process	target process
PID 992 set thread context of 576	992	406c9b9529109f835fe7292e6cf3fefe.exe	svhost.exe

Drops file in Windows directory 3 IoCs

Processes:

406c9b9529109f835fe7292e6cf3fefe.exe

description	ioc	process
File opened for modification	C:\Windows\assembly	406c9b9529109f835fe7292e6cf3fefe.exe
File created	C:\Windows\assembly\Desktop.ini	406c9b9529109f835fe7292e6cf3fefe.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	406c9b9529109f835fe7292e6cf3fefe.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

406c9b9529109f835fe7292e6cf3fefe.exesvhost.exe

pid process

992 406c9b9529109f835fe7292e6cf3fefe.exe
576 svhost.exe
576 svhost.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

406c9b9529109f835fe7292e6cf3fefe.exesvhost.exe

description pid process

Token: SeDebugPrivilege 992 406c9b9529109f835fe7292e6cf3fefe.exe
Token: SeDebugPrivilege 576 svhost.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

svhost.exe

pid process

576 svhost.exe

pid	process
992	406c9b9529109f835fe7292e6cf3fefe.exe
576	svhost.exe
576	svhost.exe

description	pid	process
Token: SeDebugPrivilege	992	406c9b9529109f835fe7292e6cf3fefe.exe
Token: SeDebugPrivilege	576	svhost.exe

pid	process
576	svhost.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

406c9b9529109f835fe7292e6cf3fefe.exe

description	pid	process	target process
PID 992 wrote to memory of 576	992	406c9b9529109f835fe7292e6cf3fefe.exe	svhost.exe
PID 992 wrote to memory of 576	992	406c9b9529109f835fe7292e6cf3fefe.exe	svhost.exe
PID 992 wrote to memory of 576	992	406c9b9529109f835fe7292e6cf3fefe.exe	svhost.exe
PID 992 wrote to memory of 576	992	406c9b9529109f835fe7292e6cf3fefe.exe	svhost.exe
PID 992 wrote to memory of 576	992	406c9b9529109f835fe7292e6cf3fefe.exe	svhost.exe
PID 992 wrote to memory of 576	992	406c9b9529109f835fe7292e6cf3fefe.exe	svhost.exe
PID 992 wrote to memory of 576	992	406c9b9529109f835fe7292e6cf3fefe.exe	svhost.exe
PID 992 wrote to memory of 576	992	406c9b9529109f835fe7292e6cf3fefe.exe	svhost.exe

C:\Users\Admin\AppData\Local\Temp\foo\406c9b9529109f835fe7292e6cf3fefe.exe
"C:\Users\Admin\AppData\Local\Temp\foo\406c9b9529109f835fe7292e6cf3fefe.exe"
1⤵
- Drops desktop.ini file(s)
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:992
- C:\Users\Admin\AppData\Local\Temp\svhost.exe
  "C:\Users\Admin\AppData\Local\Temp\svhost.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:576

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\svhost.exe

MD5
810be04867d847b702dd5fa163cb0a66

SHA1
fb2a355f356660ba494e70af002d6a728fe64aa7

SHA256
e83d07b6a965bcaf8502f7d869ff69a647b2fc68dc82bcf8be4a6b79e0e03f19

SHA512
b6e38765a9ae433994ac9d5986049aa33ab7fe581a324ef647f0295617bb00ed0af83ffc6cb33890052393ac1d34898553a3b78cab259bd4e45c446230652981

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

MD5
810be04867d847b702dd5fa163cb0a66

SHA1
fb2a355f356660ba494e70af002d6a728fe64aa7

SHA256
e83d07b6a965bcaf8502f7d869ff69a647b2fc68dc82bcf8be4a6b79e0e03f19

SHA512
b6e38765a9ae433994ac9d5986049aa33ab7fe581a324ef647f0295617bb00ed0af83ffc6cb33890052393ac1d34898553a3b78cab259bd4e45c446230652981

Download Submit
memory/576-1-0x000000000043179E-mapping.dmp

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