agenttesla | d6763692670aefdbeaf078f96827fd2218dab49654fc8d38d8c71ca6882cf262

General

Target

doc37281.exe
Size

474KB
MD5

7bdcda5cef8a47b296523f82f8832212
SHA1

5ac780660eaa4b61dd57c51a5589d66af88b7680
SHA256

b8ec5237b0bbe2d7428c7c58b4a7c76f6356a8579d3f2547dcc238b32a5a1669
SHA512

9a8c35f2f4624cf2af6590cfc622faf9b360ed27518a91058178b21fd14b636347319c7b6b33989936db6ac5046f38f27a93536960450b3abd0e8062e6eb2007

Score

10^/10

agenttesla collection evasion keylogger persistence rezer0 spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.microtechlab.in
Port:
587
Username:
[email protected]
Password:
pune@123

Signatures

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

AgentTesla Payload 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1148-61-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/1148-62-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/1148-63-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/1148-64-0x000000000044CF5E-mapping.dmp	family_agenttesla
behavioral1/memory/1148-66-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/1148-68-0x0000000000400000-0x0000000000452000-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/1600-57-0x0000000004E10000-0x0000000004E68000-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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

RegSvcs.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows\CurrentVersion\Run\CpSnJ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\CpSnJ\\CpSnJ.exe"	RegSvcs.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

doc37281.exe

description pid process target process

PID 1600 set thread context of 1148 1600 doc37281.exe RegSvcs.exe
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

REG.exe

pid process

1748 REG.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

RegSvcs.exe

pid process

1148 RegSvcs.exe
1148 RegSvcs.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

RegSvcs.exe

description pid process

Token: SeDebugPrivilege 1148 RegSvcs.exe

description	pid	process	target process
PID 1600 set thread context of 1148	1600	doc37281.exe	RegSvcs.exe

pid	process
1748	REG.exe

pid	process
1148	RegSvcs.exe
1148	RegSvcs.exe

description	pid	process
Token: SeDebugPrivilege	1148	RegSvcs.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

doc37281.exeRegSvcs.exe

description	pid	process	target process
PID 1600 wrote to memory of 1148	1600	doc37281.exe	RegSvcs.exe
PID 1600 wrote to memory of 1148	1600	doc37281.exe	RegSvcs.exe
PID 1600 wrote to memory of 1148	1600	doc37281.exe	RegSvcs.exe
PID 1600 wrote to memory of 1148	1600	doc37281.exe	RegSvcs.exe
PID 1600 wrote to memory of 1148	1600	doc37281.exe	RegSvcs.exe
PID 1600 wrote to memory of 1148	1600	doc37281.exe	RegSvcs.exe
PID 1600 wrote to memory of 1148	1600	doc37281.exe	RegSvcs.exe
PID 1600 wrote to memory of 1148	1600	doc37281.exe	RegSvcs.exe
PID 1600 wrote to memory of 1148	1600	doc37281.exe	RegSvcs.exe
PID 1600 wrote to memory of 1148	1600	doc37281.exe	RegSvcs.exe
PID 1600 wrote to memory of 1148	1600	doc37281.exe	RegSvcs.exe
PID 1600 wrote to memory of 1148	1600	doc37281.exe	RegSvcs.exe
PID 1148 wrote to memory of 1748	1148	RegSvcs.exe	REG.exe
PID 1148 wrote to memory of 1748	1148	RegSvcs.exe	REG.exe
PID 1148 wrote to memory of 1748	1148	RegSvcs.exe	REG.exe
PID 1148 wrote to memory of 1748	1148	RegSvcs.exe	REG.exe
PID 1148 wrote to memory of 1760	1148	RegSvcs.exe	netsh.exe
PID 1148 wrote to memory of 1760	1148	RegSvcs.exe	netsh.exe
PID 1148 wrote to memory of 1760	1148	RegSvcs.exe	netsh.exe
PID 1148 wrote to memory of 1760	1148	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\doc37281.exe
"C:\Users\Admin\AppData\Local\Temp\doc37281.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1600

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
"{path}"
2⤵
- Drops file in Drivers directory
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
PID:1148

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:1748

C:\Windows\SysWOW64\netsh.exe
"netsh" wlan show profile
3⤵
PID:1760

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1148-64-0x000000000044CF5E-mapping.dmp

Download
memory/1148-61-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1148-68-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1148-63-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1148-58-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1148-59-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1148-66-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1148-62-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1600-55-0x0000000075CD1000-0x0000000075CD3000-memory.dmp

Filesize
8KB

Download
memory/1600-54-0x00000000001A0000-0x000000000021C000-memory.dmp

Filesize
496KB

Download
memory/1600-57-0x0000000004E10000-0x0000000004E68000-memory.dmp

Filesize
352KB

Download
memory/1600-56-0x0000000000670000-0x0000000000678000-memory.dmp

Filesize
32KB

Download
memory/1748-70-0x0000000000000000-mapping.dmp

Download
memory/1760-71-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads