agenttesla | 0d2671309e0ab3c8145965e9d11bfa16c5f8e21990c92cb692d904ece10bb48f

General

Target

LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.exe
Size

411KB
MD5

cff3e5019bd36f4a7596fe229c9e6a2f
SHA1

b7d7e42f24cb3c3ef10497a64398a888790dcbb0
SHA256

9950693e7a2ed5a37008ea3a7c2a185132af4f3fedfbbba41fb03939dadb8044
SHA512

67e13ab5417c8751b956fd429b13fe11291d0263699c4e8f253b7ab4e266b4b2afb1411ed0907b69d84c549d03c7f5398ff885d864899d743d200f7a222b5031

Score

10^/10

agenttesla collection coreentity evasion keylogger rezer0 spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.hotel71.com.bd
Port:
587
Username:
[email protected]
Password:
9+^va&phP1v9

Signatures

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

CoreEntity .NET Packer 1 IoCs

A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.

coreentity

Processes:

resource	yara_rule
behavioral1/memory/1372-56-0x0000000000330000-0x0000000000338000-memory.dmp	coreentity

AgentTesla Payload 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1316-61-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral1/memory/1316-62-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral1/memory/1316-63-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral1/memory/1316-64-0x000000000044A9CE-mapping.dmp	family_agenttesla
behavioral1/memory/1316-66-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral1/memory/1316-68-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla

ReZer0 packer 1 IoCs

Detects ReZer0, a packer with multiple versions used in various campaigns.

rezer0

Processes:

resource	yara_rule
behavioral1/memory/1372-57-0x0000000004370000-0x00000000043C6000-memory.dmp	rezer0

Disables Task Manager via registry modification
evasion
Drops file in Drivers directory 1 IoCs

Processes:

RegSvcs.exe

description ioc process

File opened for modification C:\Windows\system32\drivers\etc\hosts RegSvcs.exe

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

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

RegSvcs.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.exe

description pid process target process

PID 1372 set thread context of 1316 1372 LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.exe RegSvcs.exe
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

REG.exe

pid process

860 REG.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

RegSvcs.exe

pid process

1316 RegSvcs.exe
1316 RegSvcs.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

RegSvcs.exe

description pid process

Token: SeDebugPrivilege 1316 RegSvcs.exe

description	pid	process	target process
PID 1372 set thread context of 1316	1372	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.exe	RegSvcs.exe

pid	process
860	REG.exe

pid	process
1316	RegSvcs.exe
1316	RegSvcs.exe

description	pid	process
Token: SeDebugPrivilege	1316	RegSvcs.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.exeRegSvcs.exe

description	pid	process	target process
PID 1372 wrote to memory of 1316	1372	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.exe	RegSvcs.exe
PID 1372 wrote to memory of 1316	1372	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.exe	RegSvcs.exe
PID 1372 wrote to memory of 1316	1372	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.exe	RegSvcs.exe
PID 1372 wrote to memory of 1316	1372	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.exe	RegSvcs.exe
PID 1372 wrote to memory of 1316	1372	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.exe	RegSvcs.exe
PID 1372 wrote to memory of 1316	1372	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.exe	RegSvcs.exe
PID 1372 wrote to memory of 1316	1372	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.exe	RegSvcs.exe
PID 1372 wrote to memory of 1316	1372	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.exe	RegSvcs.exe
PID 1372 wrote to memory of 1316	1372	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.exe	RegSvcs.exe
PID 1372 wrote to memory of 1316	1372	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.exe	RegSvcs.exe
PID 1372 wrote to memory of 1316	1372	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.exe	RegSvcs.exe
PID 1372 wrote to memory of 1316	1372	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.exe	RegSvcs.exe
PID 1316 wrote to memory of 860	1316	RegSvcs.exe	REG.exe
PID 1316 wrote to memory of 860	1316	RegSvcs.exe	REG.exe
PID 1316 wrote to memory of 860	1316	RegSvcs.exe	REG.exe
PID 1316 wrote to memory of 860	1316	RegSvcs.exe	REG.exe
PID 1316 wrote to memory of 1844	1316	RegSvcs.exe	netsh.exe
PID 1316 wrote to memory of 1844	1316	RegSvcs.exe	netsh.exe
PID 1316 wrote to memory of 1844	1316	RegSvcs.exe	netsh.exe
PID 1316 wrote to memory of 1844	1316	RegSvcs.exe	netsh.exe

outlook_office_path 1 IoCs

Processes:

RegSvcs.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe

outlook_win_path 1 IoCs

Processes:

RegSvcs.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe

C:\Users\Admin\AppData\Local\Temp\LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.exe
"C:\Users\Admin\AppData\Local\Temp\LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1372
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "{path}"
  2⤵
  - Drops file in Drivers directory
  - Accesses Microsoft Outlook profiles
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  - outlook_office_path
  - outlook_win_path
  PID:1316
- - C:\Windows\SysWOW64\REG.exe
    REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
    3⤵
    - Modifies registry key
    PID:860
- - C:\Windows\SysWOW64\netsh.exe
    "netsh" wlan show profile
    3⤵
    PID:1844

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

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Downloads

memory/860-70-0x0000000000000000-mapping.dmp

Download
memory/1316-64-0x000000000044A9CE-mapping.dmp

Download
memory/1316-58-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1316-59-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1316-61-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1316-62-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1316-63-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1316-66-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1316-68-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1372-56-0x0000000000330000-0x0000000000338000-memory.dmp

Filesize
32KB

Download
memory/1372-57-0x0000000004370000-0x00000000043C6000-memory.dmp

Filesize
344KB

Download
memory/1372-54-0x0000000000D20000-0x0000000000D8E000-memory.dmp

Filesize
440KB

Download
memory/1372-55-0x0000000075B71000-0x0000000075B73000-memory.dmp

Filesize
8KB

Download
memory/1844-71-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads