agenttesla | c01119367072c1c37368da3c14e800e66f9e3f89d304612686ecad896af6daad

General

Target

A08000143_ESP_B64891013_ESP_823041009945_20230405.exe
Size

611KB
MD5

8081970a212f3daf2249abb85384611c
SHA1

a186e350b3cd30fbe157077aed389aba452185e3
SHA256

c01119367072c1c37368da3c14e800e66f9e3f89d304612686ecad896af6daad
SHA512

aa5250760b0c6cdc727306a8f28144307903ad94a7d23c9c99522ae93569bfafb2f120aa59aecd5dc920334291b3584ef5642d10732633c37276b1f00d342dea
SSDEEP

12288:Uoqqqqqqqqqqqqqqqqqqqqq0qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqF:U12FGRxFukDzN

Score

10^/10

agenttesla guloader collection discovery downloader keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.phytomer.es
Port:
587
Username:
[email protected]
Password:
@Paqui0033-*
Email To:
[email protected]

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Checks QEMU agent file 2 TTPs 2 IoCs

Checks presence of QEMU agent, possibly to detect virtualization.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	A08000143_ESP_B64891013_ESP_823041009945_20230405.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	caspol.exe

Loads dropped DLL 1 IoCs

pid	Process
1448	A08000143_ESP_B64891013_ESP_823041009945_20230405.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	caspol.exe
Key opened	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	caspol.exe
Key opened	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	caspol.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1628	caspol.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1448	A08000143_ESP_B64891013_ESP_823041009945_20230405.exe
1628	caspol.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1448 set thread context of 1628	1448	A08000143_ESP_B64891013_ESP_823041009945_20230405.exe	27

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1628	caspol.exe
1628	caspol.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1448	A08000143_ESP_B64891013_ESP_823041009945_20230405.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1628	caspol.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1448 wrote to memory of 1628	1448	A08000143_ESP_B64891013_ESP_823041009945_20230405.exe	27
PID 1448 wrote to memory of 1628	1448	A08000143_ESP_B64891013_ESP_823041009945_20230405.exe	27
PID 1448 wrote to memory of 1628	1448	A08000143_ESP_B64891013_ESP_823041009945_20230405.exe	27
PID 1448 wrote to memory of 1628	1448	A08000143_ESP_B64891013_ESP_823041009945_20230405.exe	27
PID 1448 wrote to memory of 1628	1448	A08000143_ESP_B64891013_ESP_823041009945_20230405.exe	27

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	caspol.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	caspol.exe

C:\Users\Admin\AppData\Local\Temp\A08000143_ESP_B64891013_ESP_823041009945_20230405.exe
"C:\Users\Admin\AppData\Local\Temp\A08000143_ESP_B64891013_ESP_823041009945_20230405.exe"
1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1448
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
  "C:\Users\Admin\AppData\Local\Temp\A08000143_ESP_B64891013_ESP_823041009945_20230405.exe"
  2⤵
  - Checks QEMU agent file
  - Accesses Microsoft Outlook profiles
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:1628

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

1

T1102

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nsd1FC3.tmp\System.dll

Filesize
11KB

MD5
8b3830b9dbf87f84ddd3b26645fed3a0

SHA1
223bef1f19e644a610a0877d01eadc9e28299509

SHA256
f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37

SHA512
d13cfd98db5ca8dc9c15723eee0e7454975078a776bce26247228be4603a0217e166058ebadc68090afe988862b7514cb8cb84de13b3de35737412a6f0a8ac03

Download Submit
memory/1448-65-0x0000000003780000-0x0000000005AB4000-memory.dmp

Filesize
35.2MB

Download
memory/1448-66-0x0000000003780000-0x0000000005AB4000-memory.dmp

Filesize
35.2MB

Download
memory/1628-67-0x0000000000A10000-0x0000000002D44000-memory.dmp

Filesize
35.2MB

Download
memory/1628-68-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/1628-90-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/1628-91-0x0000000000A10000-0x0000000002D44000-memory.dmp

Filesize
35.2MB

Download
memory/1628-92-0x0000000000A10000-0x0000000002D44000-memory.dmp

Filesize
35.2MB

Download
memory/1628-94-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1628-95-0x00000000363A0000-0x00000000363E0000-memory.dmp

Filesize
256KB

Download

Analysis

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