agenttesla | 78d5fe9eee91a5de1d1356965ffc648514c7c541fffc723fc1b753468af2eb63

General

Target

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

446KB
MD5

6bdd9c15243bd5b8709b87b7ba10b3a9
SHA1

780f690b92f29296254f00b9f1958c2359991ad2
SHA256

2580575e95648d76aed0be387fbe6423ef72639b8aaa9e1ad84ebc5b74bcf7b5
SHA512

46a0f1f8a1c6d6cfbea8c287cd9f06fb44e987f8c452a2e5f99da852d871de1552a25eb7d79c794c817e16c7917d3e39383046173699c1fcc07f53dec0ec5cdd

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/1688-57-0x0000000000420000-0x0000000000428000-memory.dmp	coreentity

AgentTesla Payload 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1300-62-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral1/memory/1300-63-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral1/memory/1300-64-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral1/memory/1300-65-0x000000000044A9CE-mapping.dmp	family_agenttesla
behavioral1/memory/1300-67-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral1/memory/1300-69-0x0000000000400000-0x0000000000450000-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/1688-58-0x0000000000770000-0x00000000007C6000-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-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\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.doc.exe

description pid process target process

PID 1688 set thread context of 1300 1688 LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.doc.exe RegSvcs.exe
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

REG.exe

pid process

428 REG.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

RegSvcs.exe

pid process

1300 RegSvcs.exe
1300 RegSvcs.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

RegSvcs.exe

description pid process

Token: SeDebugPrivilege 1300 RegSvcs.exe

description	pid	process	target process
PID 1688 set thread context of 1300	1688	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.doc.exe	RegSvcs.exe

pid	process
428	REG.exe

pid	process
1300	RegSvcs.exe
1300	RegSvcs.exe

description	pid	process
Token: SeDebugPrivilege	1300	RegSvcs.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

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

description	pid	process	target process
PID 1688 wrote to memory of 1300	1688	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.doc.exe	RegSvcs.exe
PID 1688 wrote to memory of 1300	1688	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.doc.exe	RegSvcs.exe
PID 1688 wrote to memory of 1300	1688	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.doc.exe	RegSvcs.exe
PID 1688 wrote to memory of 1300	1688	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.doc.exe	RegSvcs.exe
PID 1688 wrote to memory of 1300	1688	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.doc.exe	RegSvcs.exe
PID 1688 wrote to memory of 1300	1688	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.doc.exe	RegSvcs.exe
PID 1688 wrote to memory of 1300	1688	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.doc.exe	RegSvcs.exe
PID 1688 wrote to memory of 1300	1688	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.doc.exe	RegSvcs.exe
PID 1688 wrote to memory of 1300	1688	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.doc.exe	RegSvcs.exe
PID 1688 wrote to memory of 1300	1688	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.doc.exe	RegSvcs.exe
PID 1688 wrote to memory of 1300	1688	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.doc.exe	RegSvcs.exe
PID 1688 wrote to memory of 1300	1688	LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.doc.exe	RegSvcs.exe
PID 1300 wrote to memory of 428	1300	RegSvcs.exe	REG.exe
PID 1300 wrote to memory of 428	1300	RegSvcs.exe	REG.exe
PID 1300 wrote to memory of 428	1300	RegSvcs.exe	REG.exe
PID 1300 wrote to memory of 428	1300	RegSvcs.exe	REG.exe
PID 1300 wrote to memory of 560	1300	RegSvcs.exe	netsh.exe
PID 1300 wrote to memory of 560	1300	RegSvcs.exe	netsh.exe
PID 1300 wrote to memory of 560	1300	RegSvcs.exe	netsh.exe
PID 1300 wrote to memory of 560	1300	RegSvcs.exe	netsh.exe

outlook_office_path 1 IoCs

Processes:

RegSvcs.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\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-1-5-21-790309383-526510583-3802439154-1000\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.doc.exe
"C:\Users\Admin\AppData\Local\Temp\LEGAL ACTION ON YOUR COMPANY FOR LONG OVERDUE INVOICE.doc.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1688

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:1300

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:428

C:\Windows\SysWOW64\netsh.exe
"netsh" wlan show profile
3⤵
PID:560

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/428-71-0x0000000000000000-mapping.dmp

Download
memory/560-72-0x0000000000000000-mapping.dmp

Download
memory/1300-64-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1300-59-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1300-60-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1300-62-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1300-63-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1300-65-0x000000000044A9CE-mapping.dmp

Download
memory/1300-67-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1300-69-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1688-57-0x0000000000420000-0x0000000000428000-memory.dmp

Filesize
32KB

Download
memory/1688-58-0x0000000000770000-0x00000000007C6000-memory.dmp

Filesize
344KB

Download
memory/1688-54-0x0000000001120000-0x0000000001196000-memory.dmp

Filesize
472KB

Download
memory/1688-56-0x0000000076391000-0x0000000076393000-memory.dmp

Filesize
8KB

Download
memory/1688-55-0x0000000000300000-0x000000000035C000-memory.dmp

Filesize
368KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads