agenttesla | c5f8a57e9e252306e9876a01fbc423420693bf04cf7c33fb0bbf972e34299f21

General

Target

439c8eaf5105f874659e06ecca63e66b.exe
Size

25KB
MD5

439c8eaf5105f874659e06ecca63e66b
SHA1

f264db763cacbcbc6620353097b1cd6367d14afb
SHA256

c5f8a57e9e252306e9876a01fbc423420693bf04cf7c33fb0bbf972e34299f21
SHA512

2cf9bb028b1d8ca1c321f9a809c6e1d0552992eefc2229661579edeaac8ef0d9926ff1e0a26d8962f6672a45be7bc7b2a86b8331a43a922418569b889853ac5a
SSDEEP

96:1Nd/FIveD4XyrmRNb++DvI63LilNRZjHgnmXV/cfDj6hLGkZNiRB4e3T3e4KxJdv:bxFIqmA62lNTDcmXZCehLrZbxJX

Score

10^/10

agenttesla purecrypter collection downloader keylogger loader persistence spyware stealer trojan

Malware Config

Extracted

Family

purecrypter

C2

http://www.ugr.leszczynskie.net/galeria/Xcilfp.png

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter
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
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 stealer

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 stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	439c8eaf5105f874659e06ecca63e66b.exe
Key opened	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	439c8eaf5105f874659e06ecca63e66b.exe
Key opened	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	439c8eaf5105f874659e06ecca63e66b.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Windows\CurrentVersion\Run\nEdIOIr = "C:\\Users\\Admin\\AppData\\Roaming\\nEdIOIr\\nEdIOIr.exe"	439c8eaf5105f874659e06ecca63e66b.exe

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
7	api.ipify.org
8	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 904 set thread context of 1484	904	439c8eaf5105f874659e06ecca63e66b.exe	29

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2024	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	904	439c8eaf5105f874659e06ecca63e66b.exe
Token: SeDebugPrivilege	2024	powershell.exe
Token: SeDebugPrivilege	1484	439c8eaf5105f874659e06ecca63e66b.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1484	439c8eaf5105f874659e06ecca63e66b.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 904 wrote to memory of 2024	904	439c8eaf5105f874659e06ecca63e66b.exe	27
PID 904 wrote to memory of 2024	904	439c8eaf5105f874659e06ecca63e66b.exe	27
PID 904 wrote to memory of 2024	904	439c8eaf5105f874659e06ecca63e66b.exe	27
PID 904 wrote to memory of 2024	904	439c8eaf5105f874659e06ecca63e66b.exe	27
PID 904 wrote to memory of 1484	904	439c8eaf5105f874659e06ecca63e66b.exe	29
PID 904 wrote to memory of 1484	904	439c8eaf5105f874659e06ecca63e66b.exe	29
PID 904 wrote to memory of 1484	904	439c8eaf5105f874659e06ecca63e66b.exe	29
PID 904 wrote to memory of 1484	904	439c8eaf5105f874659e06ecca63e66b.exe	29
PID 904 wrote to memory of 1484	904	439c8eaf5105f874659e06ecca63e66b.exe	29
PID 904 wrote to memory of 1484	904	439c8eaf5105f874659e06ecca63e66b.exe	29
PID 904 wrote to memory of 1484	904	439c8eaf5105f874659e06ecca63e66b.exe	29
PID 904 wrote to memory of 1484	904	439c8eaf5105f874659e06ecca63e66b.exe	29
PID 904 wrote to memory of 1484	904	439c8eaf5105f874659e06ecca63e66b.exe	29

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	439c8eaf5105f874659e06ecca63e66b.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	439c8eaf5105f874659e06ecca63e66b.exe

C:\Users\Admin\AppData\Local\Temp\439c8eaf5105f874659e06ecca63e66b.exe
"C:\Users\Admin\AppData\Local\Temp\439c8eaf5105f874659e06ecca63e66b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:904
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2024
- C:\Users\Admin\AppData\Local\Temp\439c8eaf5105f874659e06ecca63e66b.exe
  C:\Users\Admin\AppData\Local\Temp\439c8eaf5105f874659e06ecca63e66b.exe
  2⤵
  - Accesses Microsoft Outlook profiles
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - outlook_office_path
  - outlook_win_path
  PID:1484

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

3

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\CabF164.tmp

Filesize
61KB

MD5
fc4666cbca561e864e7fdf883a9e6661

SHA1
2f8d6094c7a34bf12ea0bbf0d51ee9c5bb7939a5

SHA256
10f3deb6c452d749a7451b5d065f4c0449737e5ee8a44f4d15844b503141e65b

SHA512
c71f54b571e01f247f072be4bbebdf5d8410b67eb79a61e7e0d9853fe857ab9bd12f53e6af3394b935560178107291fc4be351b27deb388eba90ba949633d57d

Download Submit
memory/904-62-0x00000000049B0000-0x00000000049F0000-memory.dmp

Filesize
256KB

Download
memory/904-55-0x00000000049B0000-0x00000000049F0000-memory.dmp

Filesize
256KB

Download
memory/904-56-0x0000000005870000-0x0000000005922000-memory.dmp

Filesize
712KB

Download
memory/904-57-0x0000000000610000-0x000000000062A000-memory.dmp

Filesize
104KB

Download
memory/904-54-0x00000000011D0000-0x00000000011DC000-memory.dmp

Filesize
48KB

Download
memory/1484-72-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1484-66-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1484-100-0x0000000000DC0000-0x0000000000E00000-memory.dmp

Filesize
256KB

Download
memory/1484-69-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1484-68-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1484-70-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1484-67-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1484-75-0x0000000000DC0000-0x0000000000E00000-memory.dmp

Filesize
256KB

Download
memory/1484-65-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1484-74-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2024-61-0x0000000002030000-0x0000000002070000-memory.dmp

Filesize
256KB

Download
memory/2024-63-0x0000000002030000-0x0000000002070000-memory.dmp

Filesize
256KB

Download
memory/2024-60-0x0000000002030000-0x0000000002070000-memory.dmp

Filesize
256KB

Download
memory/2024-64-0x0000000002030000-0x0000000002070000-memory.dmp

Filesize
256KB

Download

Analysis

Sharing