agenttesla | 5a3c1ee3937ff814ce4f26c3ebef18ffe4cf6e218411d906d5c8f21caf7ba333

General

Target

Ref PO-11059021022021.exe
Size

481KB
MD5

cdd313e8c6d6ca6489f6b4a3d0d0f2ca
SHA1

672f4a5496857a30f1491f308596c2a062569fa5
SHA256

7671a41dabb2a4e2f84270501f7c4adc005ed000d889de21d7bc1c859180f585
SHA512

7f81c539b3a9ec3c075f1026a076d1ae2d55252bec0374e3d574dc5a7c754d0f255582db45843a11d00460768bf9bcc8ac55fc50ece75d361ce70bfb9fe1212c

Score

10^/10

agenttesla collection coreentity evasion keylogger rezer0 spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.pptoursperu.com
Port:
587
Username:
[email protected]
Password:
mailppt2019-

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/1672-57-0x0000000000230000-0x0000000000238000-memory.dmp	coreentity

AgentTesla Payload 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/564-62-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral1/memory/564-63-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral1/memory/564-64-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral1/memory/564-65-0x000000000044ABAE-mapping.dmp	family_agenttesla
behavioral1/memory/564-67-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral1/memory/564-69-0x0000000000400000-0x0000000000450000-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/1672-58-0x0000000004BA0000-0x0000000004BF6000-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-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

Ref PO-11059021022021.exe

description pid process target process

PID 1672 set thread context of 564 1672 Ref PO-11059021022021.exe RegSvcs.exe
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

REG.exe

pid process

572 REG.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

RegSvcs.exe

pid process

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

Processes:

RegSvcs.exe

description pid process

Token: SeDebugPrivilege 564 RegSvcs.exe

description	pid	process	target process
PID 1672 set thread context of 564	1672	Ref PO-11059021022021.exe	RegSvcs.exe

pid	process
572	REG.exe

pid	process
564	RegSvcs.exe
564	RegSvcs.exe

description	pid	process
Token: SeDebugPrivilege	564	RegSvcs.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

Ref PO-11059021022021.exeRegSvcs.exe

description	pid	process	target process
PID 1672 wrote to memory of 564	1672	Ref PO-11059021022021.exe	RegSvcs.exe
PID 1672 wrote to memory of 564	1672	Ref PO-11059021022021.exe	RegSvcs.exe
PID 1672 wrote to memory of 564	1672	Ref PO-11059021022021.exe	RegSvcs.exe
PID 1672 wrote to memory of 564	1672	Ref PO-11059021022021.exe	RegSvcs.exe
PID 1672 wrote to memory of 564	1672	Ref PO-11059021022021.exe	RegSvcs.exe
PID 1672 wrote to memory of 564	1672	Ref PO-11059021022021.exe	RegSvcs.exe
PID 1672 wrote to memory of 564	1672	Ref PO-11059021022021.exe	RegSvcs.exe
PID 1672 wrote to memory of 564	1672	Ref PO-11059021022021.exe	RegSvcs.exe
PID 1672 wrote to memory of 564	1672	Ref PO-11059021022021.exe	RegSvcs.exe
PID 1672 wrote to memory of 564	1672	Ref PO-11059021022021.exe	RegSvcs.exe
PID 1672 wrote to memory of 564	1672	Ref PO-11059021022021.exe	RegSvcs.exe
PID 1672 wrote to memory of 564	1672	Ref PO-11059021022021.exe	RegSvcs.exe
PID 564 wrote to memory of 572	564	RegSvcs.exe	REG.exe
PID 564 wrote to memory of 572	564	RegSvcs.exe	REG.exe
PID 564 wrote to memory of 572	564	RegSvcs.exe	REG.exe
PID 564 wrote to memory of 572	564	RegSvcs.exe	REG.exe
PID 564 wrote to memory of 108	564	RegSvcs.exe	netsh.exe
PID 564 wrote to memory of 108	564	RegSvcs.exe	netsh.exe
PID 564 wrote to memory of 108	564	RegSvcs.exe	netsh.exe
PID 564 wrote to memory of 108	564	RegSvcs.exe	netsh.exe

outlook_office_path 1 IoCs

Processes:

RegSvcs.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\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-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe

C:\Users\Admin\AppData\Local\Temp\Ref PO-11059021022021.exe
"C:\Users\Admin\AppData\Local\Temp\Ref PO-11059021022021.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1672

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:564

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:572

C:\Windows\SysWOW64\netsh.exe
"netsh" wlan show profile
3⤵
PID:108

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/108-72-0x0000000000000000-mapping.dmp

Download
memory/564-64-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/564-63-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/564-69-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/564-67-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/564-59-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/564-60-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/564-62-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/564-65-0x000000000044ABAE-mapping.dmp

Download
memory/572-71-0x0000000000000000-mapping.dmp

Download
memory/1672-54-0x00000000011E0000-0x000000000125E000-memory.dmp

Filesize
504KB

Download
memory/1672-56-0x00000000763C1000-0x00000000763C3000-memory.dmp

Filesize
8KB

Download
memory/1672-58-0x0000000004BA0000-0x0000000004BF6000-memory.dmp

Filesize
344KB

Download
memory/1672-57-0x0000000000230000-0x0000000000238000-memory.dmp

Filesize
32KB

Download
memory/1672-55-0x00000000003B0000-0x0000000000410000-memory.dmp

Filesize
384KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads