agenttesla | 29d212f84a154cdc5f3d9427f03113e9681dee943963a9779f466ecadab0ed40

General

Target

CAIXABAN.exe
Size

72KB
MD5

fe3ab924e1d37874593b376966d5440f
SHA1

9a6e8a32dbdac605421d987022f0bd12ed6fa415
SHA256

c6f61c3603ed074cec9af4cf5b6c4f56ef5d476e4cb06e21e5c1b313128b4e0d
SHA512

68c48f55f875dbd9781df595ffc2812b4e776a90a46d2e4ece114b079e3e0537d461f8da58947c4b9d029dfb5e3d30994861231d8e7280fc807a31e160dade0e
SSDEEP

384:o8SOHLPTDeUzpNGkrdwTXCZB9i3oN6anxOPz0GwJ3TDCYt/9QylTW:o8rLyUfi3yLDTVW

Score

10^/10

agenttesla purecrypter collection downloader keylogger loader persistence spyware stealer trojan

Malware Config

Extracted

Family

purecrypter

C2

http://superbtanzaniasafaris.com/zav/Qtpprpwy.bmp

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.humanpower.vn
Port:
587
Username:
[email protected]
Password:
xlA}CL.(Jj8C
Email To:
[email protected]

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-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	CAIXABAN.exe
Key opened	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	CAIXABAN.exe
Key opened	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	CAIXABAN.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-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\Run\Ryjtppsu = "\"C:\\Users\\Admin\\AppData\\Roaming\\Ulrfeummho\\Ryjtppsu.exe\""	CAIXABAN.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 832 set thread context of 1792	832	CAIXABAN.exe	31

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 3 IoCs

pid	Process
1248	powershell.exe
832	CAIXABAN.exe
832	CAIXABAN.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	832	CAIXABAN.exe
Token: SeDebugPrivilege	1248	powershell.exe
Token: SeDebugPrivilege	1792	CAIXABAN.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 832 wrote to memory of 1248	832	CAIXABAN.exe	27
PID 832 wrote to memory of 1248	832	CAIXABAN.exe	27
PID 832 wrote to memory of 1248	832	CAIXABAN.exe	27
PID 832 wrote to memory of 1248	832	CAIXABAN.exe	27
PID 832 wrote to memory of 1548	832	CAIXABAN.exe	29
PID 832 wrote to memory of 1548	832	CAIXABAN.exe	29
PID 832 wrote to memory of 1548	832	CAIXABAN.exe	29
PID 832 wrote to memory of 1548	832	CAIXABAN.exe	29
PID 832 wrote to memory of 424	832	CAIXABAN.exe	30
PID 832 wrote to memory of 424	832	CAIXABAN.exe	30
PID 832 wrote to memory of 424	832	CAIXABAN.exe	30
PID 832 wrote to memory of 424	832	CAIXABAN.exe	30
PID 832 wrote to memory of 1792	832	CAIXABAN.exe	31
PID 832 wrote to memory of 1792	832	CAIXABAN.exe	31
PID 832 wrote to memory of 1792	832	CAIXABAN.exe	31
PID 832 wrote to memory of 1792	832	CAIXABAN.exe	31
PID 832 wrote to memory of 1792	832	CAIXABAN.exe	31
PID 832 wrote to memory of 1792	832	CAIXABAN.exe	31
PID 832 wrote to memory of 1792	832	CAIXABAN.exe	31
PID 832 wrote to memory of 1792	832	CAIXABAN.exe	31
PID 832 wrote to memory of 1792	832	CAIXABAN.exe	31

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	CAIXABAN.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	CAIXABAN.exe

C:\Users\Admin\AppData\Local\Temp\CAIXABAN.exe
"C:\Users\Admin\AppData\Local\Temp\CAIXABAN.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:832
- 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:1248
- C:\Users\Admin\AppData\Local\Temp\CAIXABAN.exe
  C:\Users\Admin\AppData\Local\Temp\CAIXABAN.exe
  2⤵
  PID:1548
- C:\Users\Admin\AppData\Local\Temp\CAIXABAN.exe
  C:\Users\Admin\AppData\Local\Temp\CAIXABAN.exe
  2⤵
  PID:424
- C:\Users\Admin\AppData\Local\Temp\CAIXABAN.exe
  C:\Users\Admin\AppData\Local\Temp\CAIXABAN.exe
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:1792

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

memory/832-54-0x0000000000EC0000-0x0000000000ED8000-memory.dmp

Filesize
96KB

Download
memory/832-55-0x0000000076CE1000-0x0000000076CE3000-memory.dmp

Filesize
8KB

Download
memory/832-56-0x0000000005BE0000-0x0000000005C94000-memory.dmp

Filesize
720KB

Download
memory/832-57-0x00000000009B0000-0x00000000009CA000-memory.dmp

Filesize
104KB

Download
memory/1248-60-0x000000006ECD0000-0x000000006F27B000-memory.dmp

Filesize
5.7MB

Download
memory/1248-61-0x000000006ECD0000-0x000000006F27B000-memory.dmp

Filesize
5.7MB

Download
memory/1248-62-0x000000006ECD0000-0x000000006F27B000-memory.dmp

Filesize
5.7MB

Download
memory/1792-63-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1792-64-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1792-66-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1792-67-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1792-68-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1792-71-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1792-73-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads