agenttesla | f183afe99d57987a29315da21c77a6d6a96f9bb38871161e3d53a4d21fde0725

General

Target

DHL_overdue account letter.exe
Size

458KB
MD5

a33dbdecdb343c3ac0c84e514f13d113
SHA1

2db5cbc0dda1bc192f1886f259f177a92e2e595e
SHA256

c87d0af1b7d984327de7a8e4a46c3d8b2cbfe2c6e74d3c31e158b7d92e42226e
SHA512

337a2e944bcd95e5f8e45e10f4f075b30a152df24eb19d69cfef849636f9868a1fe8273e511b1fad805c15aedd0d3ff7444614d54da0e61fd9b2f25141ab9da2

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/1964-63-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/1964-64-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/1964-65-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/1964-66-0x000000000044CF5E-mapping.dmp	family_agenttesla
behavioral1/memory/1964-68-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/1964-70-0x0000000000400000-0x0000000000452000-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/756-57-0x0000000000A90000-0x0000000000AE8000-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\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
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

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-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows\CurrentVersion\Run\CpSnJ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\CpSnJ\\CpSnJ.exe"	RegSvcs.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

DHL_overdue account letter.exe

description pid process target process

PID 756 set thread context of 1964 756 DHL_overdue account letter.exe RegSvcs.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

2020 schtasks.exe
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

REG.exe

pid process

696 REG.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

DHL_overdue account letter.exeRegSvcs.exe

pid process

756 DHL_overdue account letter.exe
1964 RegSvcs.exe
1964 RegSvcs.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

DHL_overdue account letter.exeRegSvcs.exe

description pid process

Token: SeDebugPrivilege 756 DHL_overdue account letter.exe
Token: SeDebugPrivilege 1964 RegSvcs.exe

description	pid	process	target process
PID 756 set thread context of 1964	756	DHL_overdue account letter.exe	RegSvcs.exe

pid	process
2020	schtasks.exe

pid	process
696	REG.exe

pid	process
756	DHL_overdue account letter.exe
1964	RegSvcs.exe
1964	RegSvcs.exe

description	pid	process
Token: SeDebugPrivilege	756	DHL_overdue account letter.exe
Token: SeDebugPrivilege	1964	RegSvcs.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

DHL_overdue account letter.exeRegSvcs.exe

description	pid	process	target process
PID 756 wrote to memory of 2020	756	DHL_overdue account letter.exe	schtasks.exe
PID 756 wrote to memory of 2020	756	DHL_overdue account letter.exe	schtasks.exe
PID 756 wrote to memory of 2020	756	DHL_overdue account letter.exe	schtasks.exe
PID 756 wrote to memory of 2020	756	DHL_overdue account letter.exe	schtasks.exe
PID 756 wrote to memory of 1964	756	DHL_overdue account letter.exe	RegSvcs.exe
PID 756 wrote to memory of 1964	756	DHL_overdue account letter.exe	RegSvcs.exe
PID 756 wrote to memory of 1964	756	DHL_overdue account letter.exe	RegSvcs.exe
PID 756 wrote to memory of 1964	756	DHL_overdue account letter.exe	RegSvcs.exe
PID 756 wrote to memory of 1964	756	DHL_overdue account letter.exe	RegSvcs.exe
PID 756 wrote to memory of 1964	756	DHL_overdue account letter.exe	RegSvcs.exe
PID 756 wrote to memory of 1964	756	DHL_overdue account letter.exe	RegSvcs.exe
PID 756 wrote to memory of 1964	756	DHL_overdue account letter.exe	RegSvcs.exe
PID 756 wrote to memory of 1964	756	DHL_overdue account letter.exe	RegSvcs.exe
PID 756 wrote to memory of 1964	756	DHL_overdue account letter.exe	RegSvcs.exe
PID 756 wrote to memory of 1964	756	DHL_overdue account letter.exe	RegSvcs.exe
PID 756 wrote to memory of 1964	756	DHL_overdue account letter.exe	RegSvcs.exe
PID 1964 wrote to memory of 696	1964	RegSvcs.exe	REG.exe
PID 1964 wrote to memory of 696	1964	RegSvcs.exe	REG.exe
PID 1964 wrote to memory of 696	1964	RegSvcs.exe	REG.exe
PID 1964 wrote to memory of 696	1964	RegSvcs.exe	REG.exe
PID 1964 wrote to memory of 1496	1964	RegSvcs.exe	netsh.exe
PID 1964 wrote to memory of 1496	1964	RegSvcs.exe	netsh.exe
PID 1964 wrote to memory of 1496	1964	RegSvcs.exe	netsh.exe
PID 1964 wrote to memory of 1496	1964	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\DHL_overdue account letter.exe
"C:\Users\Admin\AppData\Local\Temp\DHL_overdue account letter.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:756

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\pJOrXGjClnBa" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1527.tmp"
2⤵
- Creates scheduled task(s)
PID:2020

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:1964

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:696

C:\Windows\SysWOW64\netsh.exe
"netsh" wlan show profile
3⤵
PID:1496

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

Scheduled Task

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp1527.tmp

Filesize
1KB

MD5
8a3beab27ab8bcc8fcd8fc5c164a05a7

SHA1
756ce9b6cc6b53cf60862e4101e9ee444d54570d

SHA256
c0cd54bc46c2a46040f28a9d7e37de235defaca39f8682264d9fb984b7581c9a

SHA512
9e6f6fe38121d94302a6955b27b50fdbfbb817eacca217715c12b9111543abdafa47ebb7a2c59dea7139f13f857bf5e76287e10098d3e7c8134978b9192d76ce

Download Submit
memory/696-72-0x0000000000000000-mapping.dmp

Download
memory/756-54-0x0000000001020000-0x0000000001098000-memory.dmp

Filesize
480KB

Download
memory/756-55-0x00000000755B1000-0x00000000755B3000-memory.dmp

Filesize
8KB

Download
memory/756-56-0x0000000000290000-0x0000000000298000-memory.dmp

Filesize
32KB

Download
memory/756-57-0x0000000000A90000-0x0000000000AE8000-memory.dmp

Filesize
352KB

Download
memory/1496-73-0x0000000000000000-mapping.dmp

Download
memory/1964-68-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1964-63-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1964-64-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1964-65-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1964-66-0x000000000044CF5E-mapping.dmp

Download
memory/1964-61-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1964-70-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1964-60-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/2020-58-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads