agenttesla | a146e768cf4a675a23e8cf6d69ea0cdfc57cca8ae35be0987e6b4e1c8ccbffaf

General

Target

yUmhbIVCVQTSIy5.exe
Size

1.5MB
MD5

75e6ba6e91ca3dab6df36a607ff99770
SHA1

b901d5180a8b6c85e638c7cc2bc6adf2620b2c45
SHA256

1d1481448331318ac01e5de6b53de842b79211bc4c4cc13829f38f699a6cc3a1
SHA512

04c6c2e4aea3e6cac02ed8f173a8f50cd7d92ebd263824a2b2afda5037416484495bed37f6a0d3de5bc8eebb4ac33d6349ab99e6662a6f7db4a2e00f90800b14
SSDEEP

12288:5NbAdYIq3LK7Ene4rKlP+Rw5bLrRBXPs7eE3U30ZambxfohKQ6H+Uy1Susr8MmHF:oOIK+sKURqfPgewU3samBCZZS5R0

Score

10^/10

agenttesla collection credential_access discovery keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.yucesankepenk.com.tr
Port:
587
Username:
[email protected]
Password:
Rbv7r%to2@RR

Signatures

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

AgentTesla payload 5 IoCs

resource	yara_rule
behavioral1/memory/2612-14-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/2612-18-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/2612-16-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/2612-11-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/2612-10-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	yUmhbIVCVQTSIy5.exe

Reads WinSCP keys stored on the system 2 TTPs
Tries to access WinSCP stored sessions.
spyware stealer

Data from Local System
T1005

Credentials in Registry
T1552.002
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
T1552.001
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
T1552.001
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003
Unsecured Credentials: Credentials In Files 1 TTPs
Steal credentials from unsecured files.
credential_access stealer

Credentials In Files
T1552.001

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	yUmhbIVCVQTSIy5.exe
Key opened	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	yUmhbIVCVQTSIy5.exe
Key opened	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	yUmhbIVCVQTSIy5.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Run\mBRCdKH = "C:\\Users\\Admin\\AppData\\Roaming\\mBRCdKH\\mBRCdKH.exe"	yUmhbIVCVQTSIy5.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3056 set thread context of 2612	3056	yUmhbIVCVQTSIy5.exe	32

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	yUmhbIVCVQTSIy5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	yUmhbIVCVQTSIy5.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3056	yUmhbIVCVQTSIy5.exe
3056	yUmhbIVCVQTSIy5.exe
2612	yUmhbIVCVQTSIy5.exe
2612	yUmhbIVCVQTSIy5.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
2612	yUmhbIVCVQTSIy5.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3056	yUmhbIVCVQTSIy5.exe
Token: SeDebugPrivilege	2612	yUmhbIVCVQTSIy5.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2612	yUmhbIVCVQTSIy5.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 3056 wrote to memory of 2904	3056	yUmhbIVCVQTSIy5.exe	31
PID 3056 wrote to memory of 2904	3056	yUmhbIVCVQTSIy5.exe	31
PID 3056 wrote to memory of 2904	3056	yUmhbIVCVQTSIy5.exe	31
PID 3056 wrote to memory of 2904	3056	yUmhbIVCVQTSIy5.exe	31
PID 3056 wrote to memory of 2612	3056	yUmhbIVCVQTSIy5.exe	32
PID 3056 wrote to memory of 2612	3056	yUmhbIVCVQTSIy5.exe	32
PID 3056 wrote to memory of 2612	3056	yUmhbIVCVQTSIy5.exe	32
PID 3056 wrote to memory of 2612	3056	yUmhbIVCVQTSIy5.exe	32
PID 3056 wrote to memory of 2612	3056	yUmhbIVCVQTSIy5.exe	32
PID 3056 wrote to memory of 2612	3056	yUmhbIVCVQTSIy5.exe	32
PID 3056 wrote to memory of 2612	3056	yUmhbIVCVQTSIy5.exe	32
PID 3056 wrote to memory of 2612	3056	yUmhbIVCVQTSIy5.exe	32
PID 3056 wrote to memory of 2612	3056	yUmhbIVCVQTSIy5.exe	32

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	yUmhbIVCVQTSIy5.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	yUmhbIVCVQTSIy5.exe

C:\Users\Admin\AppData\Local\Temp\yUmhbIVCVQTSIy5.exe
"C:\Users\Admin\AppData\Local\Temp\yUmhbIVCVQTSIy5.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3056
- C:\Users\Admin\AppData\Local\Temp\yUmhbIVCVQTSIy5.exe
  "C:\Users\Admin\AppData\Local\Temp\yUmhbIVCVQTSIy5.exe"
  2⤵
  PID:2904
- C:\Users\Admin\AppData\Local\Temp\yUmhbIVCVQTSIy5.exe
  "C:\Users\Admin\AppData\Local\Temp\yUmhbIVCVQTSIy5.exe"
  2⤵
  - Drops file in Drivers directory
  - Accesses Microsoft Outlook profiles
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: RenamesItself
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - outlook_office_path
  - outlook_win_path
  PID:2612

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

5

T1552

Credentials In Files

4

T1552.001

Credentials in Registry

1

T1552.002

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2612-8-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/2612-11-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/2612-26-0x0000000074720000-0x0000000074E0E000-memory.dmp

Filesize
6.9MB

Download
memory/2612-23-0x0000000074720000-0x0000000074E0E000-memory.dmp

Filesize
6.9MB

Download
memory/2612-22-0x0000000074720000-0x0000000074E0E000-memory.dmp

Filesize
6.9MB

Download
memory/2612-20-0x0000000074720000-0x0000000074E0E000-memory.dmp

Filesize
6.9MB

Download
memory/2612-18-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/2612-21-0x0000000074720000-0x0000000074E0E000-memory.dmp

Filesize
6.9MB

Download
memory/2612-9-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/2612-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2612-10-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/2612-16-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/2612-14-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/3056-6-0x00000000057F0000-0x000000000588E000-memory.dmp

Filesize
632KB

Download
memory/3056-1-0x0000000000220000-0x00000000003AA000-memory.dmp

Filesize
1.5MB

Download
memory/3056-0-0x000000007472E000-0x000000007472F000-memory.dmp

Filesize
4KB

Download
memory/3056-19-0x0000000074720000-0x0000000074E0E000-memory.dmp

Filesize
6.9MB

Download
memory/3056-7-0x0000000000740000-0x000000000077C000-memory.dmp

Filesize
240KB

Download
memory/3056-5-0x0000000074720000-0x0000000074E0E000-memory.dmp

Filesize
6.9MB

Download
memory/3056-4-0x000000007472E000-0x000000007472F000-memory.dmp

Filesize
4KB

Download
memory/3056-3-0x00000000003B0000-0x00000000003CE000-memory.dmp

Filesize
120KB

Download
memory/3056-2-0x0000000074720000-0x0000000074E0E000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads