agenttesla | 6f9c338998bd331f4d59661d3a68c80f21934e35332996d8a194c61552e5da45

General

Target

05092024_1357_05092024_PI_230524.rtf
Size

675KB
MD5

e95d774d12e3ffc8cebcbf895e174f7f
SHA1

1bb43bc659153b1486c81441cb6b852fea2f73f5
SHA256

6f9c338998bd331f4d59661d3a68c80f21934e35332996d8a194c61552e5da45
SHA512

b4e2d2bf428d7a6e922f6b8990378071903f899fa9cc554b7daab338d57c021397d016a38a469d7f59dce26e764af514849876e454bef9d50fe8b6292c6ceb97
SSDEEP

6144:FwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAR:v

Score

10^/10

agenttesla credential_access discovery execution keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
smtp.yandex.com
Port:
587
Username:
[email protected]
Password:
aowapnzgtwgqowgt
Email To:
[email protected]

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Blocklisted process makes network request 1 IoCs

flow	pid	Process
4	1808	EQNEDT32.EXE

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1832	powershell.exe

Downloads MZ/PE file

Executes dropped EXE 2 IoCs

pid	Process
2748	yevmplug86820.exe
2960	yevmplug86820.exe

Loads dropped DLL 1 IoCs

pid	Process
1808	EQNEDT32.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 2 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

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2748 set thread context of 2960	2748	yevmplug86820.exe	38

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Debug\WIA\wiatrace.log	WINWORD.EXE

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 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	yevmplug86820.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	EQNEDT32.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	yevmplug86820.exe

Office loads VBA resources, possible macro or embedded object present

Launches Equation Editor 1 TTPs 1 IoCs

Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

exploit

Exploitation for Client Execution

T1203

pid	Process
1808	EQNEDT32.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1736	WINWORD.EXE

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2960	yevmplug86820.exe
2960	yevmplug86820.exe
2960	yevmplug86820.exe
2960	yevmplug86820.exe
1832	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2960	yevmplug86820.exe
Token: SeDebugPrivilege	1832	powershell.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1736	WINWORD.EXE
1736	WINWORD.EXE

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1808 wrote to memory of 2748	1808	EQNEDT32.EXE	32
PID 1808 wrote to memory of 2748	1808	EQNEDT32.EXE	32
PID 1808 wrote to memory of 2748	1808	EQNEDT32.EXE	32
PID 1808 wrote to memory of 2748	1808	EQNEDT32.EXE	32
PID 1736 wrote to memory of 2892	1736	WINWORD.EXE	35
PID 1736 wrote to memory of 2892	1736	WINWORD.EXE	35
PID 1736 wrote to memory of 2892	1736	WINWORD.EXE	35
PID 1736 wrote to memory of 2892	1736	WINWORD.EXE	35
PID 2748 wrote to memory of 1832	2748	yevmplug86820.exe	36
PID 2748 wrote to memory of 1832	2748	yevmplug86820.exe	36
PID 2748 wrote to memory of 1832	2748	yevmplug86820.exe	36
PID 2748 wrote to memory of 1832	2748	yevmplug86820.exe	36
PID 2748 wrote to memory of 2960	2748	yevmplug86820.exe	38
PID 2748 wrote to memory of 2960	2748	yevmplug86820.exe	38
PID 2748 wrote to memory of 2960	2748	yevmplug86820.exe	38
PID 2748 wrote to memory of 2960	2748	yevmplug86820.exe	38
PID 2748 wrote to memory of 2960	2748	yevmplug86820.exe	38
PID 2748 wrote to memory of 2960	2748	yevmplug86820.exe	38
PID 2748 wrote to memory of 2960	2748	yevmplug86820.exe	38
PID 2748 wrote to memory of 2960	2748	yevmplug86820.exe	38
PID 2748 wrote to memory of 2960	2748	yevmplug86820.exe	38

C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\05092024_1357_05092024_PI_230524.rtf"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1736
- C:\Windows\splwow64.exe
  C:\Windows\splwow64.exe 12288
  2⤵
  PID:2892

C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- Blocklisted process makes network request
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:1808
- C:\Users\Admin\AppData\Roaming\yevmplug86820.exe
  "C:\Users\Admin\AppData\Roaming\yevmplug86820.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2748
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\yevmplug86820.exe"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Drops file in System32 directory
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1832
- - C:\Users\Admin\AppData\Roaming\yevmplug86820.exe
    "C:\Users\Admin\AppData\Roaming\yevmplug86820.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2960

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Exploitation for Client Execution

1

T1203

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

4

T1552

Credentials In Files

3

T1552.001

Credentials in Registry

1

T1552.002

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

4

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Templates\Normal.dotm

Filesize
19KB

MD5
395552569be77adcde776e11bf2c43bc

SHA1
78f3ce09bc99a102a1e3d9a7d216b1f48f964e98

SHA256
fcbe55cd1e4184c80a87e8cd5a4d5fb093bfe1f7c74b9afeb0f22efe2e70bb87

SHA512
0dfa732b9c67206a7fe8a2910ab5a84910754f8ba80ceafb1a932a3a98bc745e64fcb358162def355b62cb2a45d30213a3449800c28a94ccd9cf4c99142f2a66

Download Submit
\Users\Admin\AppData\Roaming\yevmplug86820.exe

Filesize
746KB

MD5
69da125c06780ec4ad9417e884ff94ff

SHA1
e85221ba52679d3bcf853cf30139b28ec1c83310

SHA256
185f917832ca4dd37d1275969de107ffd07f055f01041e321a980d96c646dff8

SHA512
2086d891d681208e28a0225335e610b9ff2c9117fde3d6627ae6d7170879c7a4103d12cc3ef56a94f3bf65f9c76d9359d8d2123d7392a999fc726f8496f7fddc

Download Submit
memory/1736-54-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1736-1-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1736-2-0x0000000070E4D000-0x0000000070E58000-memory.dmp

Filesize
44KB

Download
memory/1736-16-0x0000000070E4D000-0x0000000070E58000-memory.dmp

Filesize
44KB

Download
memory/1736-0-0x000000002FBD1000-0x000000002FBD2000-memory.dmp

Filesize
4KB

Download
memory/2748-14-0x0000000000B20000-0x0000000000BDE000-memory.dmp

Filesize
760KB

Download
memory/2748-15-0x00000000009A0000-0x00000000009B8000-memory.dmp

Filesize
96KB

Download
memory/2748-17-0x00000000056E0000-0x0000000005762000-memory.dmp

Filesize
520KB

Download
memory/2960-31-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/2960-26-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2960-24-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/2960-22-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/2960-20-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/2960-18-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/2960-27-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/2960-29-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download

Analysis

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