agenttesla | 4f0088a886aaa996f084420ba091b9e29f5df2096646b2f4bf8bfcec781397d6

General

Target

WO-File.PDF.exe
Size

416KB
MD5

20a70b9509a96449ec99e50fa5824fed
SHA1

7bed798c0c3cf3f63271a9adb8a281c14dd9da6b
SHA256

c87b319c28a538e76b2f86f21b68efa15581c90c727d36d4fd415a9d899e59dd
SHA512

ba1f0feba08612a7ae6b41d6ee2dfa867508e347002dcb9250063d2103f6f5fb6f50602c717b223b82610b39f2965e8851fdf1eeeb02865a7fd49709bdba6c99

Score

10^/10

agenttesla collection evasion keylogger persistence rezer0 spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.pro-powersourcing.com
Port:
587
Username:
[email protected]
Password:
china1977

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/804-63-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/804-64-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/804-65-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/804-66-0x000000000044CE0E-mapping.dmp	family_agenttesla
behavioral1/memory/804-68-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/804-70-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla

Looks for VirtualBox Guest Additions in registry 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

ReZer0 packer 1 IoCs

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

rezer0

Processes:

resource	yara_rule
behavioral1/memory/864-57-0x0000000004E30000-0x0000000004E88000-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
Looks for VMWare Tools registry key 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

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

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

WO-File.PDF.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	WO-File.PDF.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	WO-File.PDF.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

RegSvcs.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\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-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows\CurrentVersion\Run\CpSnJ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\CpSnJ\\CpSnJ.exe"	RegSvcs.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

WO-File.PDF.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	WO-File.PDF.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	WO-File.PDF.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

WO-File.PDF.exe

description pid process target process

PID 864 set thread context of 804 864 WO-File.PDF.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

1956 schtasks.exe
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

REG.exe

pid process

632 REG.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

WO-File.PDF.exeRegSvcs.exe

pid process

864 WO-File.PDF.exe
804 RegSvcs.exe
804 RegSvcs.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

WO-File.PDF.exeRegSvcs.exe

description pid process

Token: SeDebugPrivilege 864 WO-File.PDF.exe
Token: SeDebugPrivilege 804 RegSvcs.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

RegSvcs.exe

pid process

804 RegSvcs.exe

description	pid	process	target process
PID 864 set thread context of 804	864	WO-File.PDF.exe	RegSvcs.exe

pid	process
1956	schtasks.exe

pid	process
632	REG.exe

pid	process
864	WO-File.PDF.exe
804	RegSvcs.exe
804	RegSvcs.exe

description	pid	process
Token: SeDebugPrivilege	864	WO-File.PDF.exe
Token: SeDebugPrivilege	804	RegSvcs.exe

pid	process
804	RegSvcs.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

WO-File.PDF.exeRegSvcs.exe

description	pid	process	target process
PID 864 wrote to memory of 1956	864	WO-File.PDF.exe	schtasks.exe
PID 864 wrote to memory of 1956	864	WO-File.PDF.exe	schtasks.exe
PID 864 wrote to memory of 1956	864	WO-File.PDF.exe	schtasks.exe
PID 864 wrote to memory of 1956	864	WO-File.PDF.exe	schtasks.exe
PID 864 wrote to memory of 804	864	WO-File.PDF.exe	RegSvcs.exe
PID 864 wrote to memory of 804	864	WO-File.PDF.exe	RegSvcs.exe
PID 864 wrote to memory of 804	864	WO-File.PDF.exe	RegSvcs.exe
PID 864 wrote to memory of 804	864	WO-File.PDF.exe	RegSvcs.exe
PID 864 wrote to memory of 804	864	WO-File.PDF.exe	RegSvcs.exe
PID 864 wrote to memory of 804	864	WO-File.PDF.exe	RegSvcs.exe
PID 864 wrote to memory of 804	864	WO-File.PDF.exe	RegSvcs.exe
PID 864 wrote to memory of 804	864	WO-File.PDF.exe	RegSvcs.exe
PID 864 wrote to memory of 804	864	WO-File.PDF.exe	RegSvcs.exe
PID 864 wrote to memory of 804	864	WO-File.PDF.exe	RegSvcs.exe
PID 864 wrote to memory of 804	864	WO-File.PDF.exe	RegSvcs.exe
PID 864 wrote to memory of 804	864	WO-File.PDF.exe	RegSvcs.exe
PID 804 wrote to memory of 632	804	RegSvcs.exe	REG.exe
PID 804 wrote to memory of 632	804	RegSvcs.exe	REG.exe
PID 804 wrote to memory of 632	804	RegSvcs.exe	REG.exe
PID 804 wrote to memory of 632	804	RegSvcs.exe	REG.exe
PID 804 wrote to memory of 1728	804	RegSvcs.exe	netsh.exe
PID 804 wrote to memory of 1728	804	RegSvcs.exe	netsh.exe
PID 804 wrote to memory of 1728	804	RegSvcs.exe	netsh.exe
PID 804 wrote to memory of 1728	804	RegSvcs.exe	netsh.exe

outlook_office_path 1 IoCs

Processes:

RegSvcs.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\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-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe

C:\Users\Admin\AppData\Local\Temp\WO-File.PDF.exe
"C:\Users\Admin\AppData\Local\Temp\WO-File.PDF.exe"
1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:864

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vXRfOWVZyW" /XML "C:\Users\Admin\AppData\Local\Temp\tmpECFE.tmp"
2⤵
- Creates scheduled task(s)
PID:1956

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 SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
PID:804

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:632

C:\Windows\SysWOW64\netsh.exe
"netsh" wlan show profile
3⤵
PID:1728

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

1

T1060

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

4

T1012

Virtualization/Sandbox Evasion

2

T1497

System Information Discovery

3

T1082

Peripheral Device Discovery

1

T1120

Lateral Movement

Collection

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpECFE.tmp
Filesize
1KB

MD5
26ff5f0d361bb2cc8ae96f5b37be3267

SHA1
809a0bfc9c0862fdfea79b3e4135d6871e102c60

SHA256
bb2814139385fbc98603eb5242e7835015d9f2b71b00172b6f7057b4a94b9393

SHA512
f1e476d43c6e3673cf33f27f2d5783c1be7b071b9c2a27b5f29547b1a056fc2c8e849c75247d9b87b22d934e2b8cd627d2d8d9683810d75aacf359b1913f8147

Download Submit
memory/632-72-0x0000000000000000-mapping.dmp

Download
memory/804-68-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/804-64-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/804-70-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/804-66-0x000000000044CE0E-mapping.dmp

Download
memory/804-60-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/804-61-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/804-63-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/804-65-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/864-57-0x0000000004E30000-0x0000000004E88000-memory.dmp

Filesize
352KB

Download
memory/864-56-0x00000000003E0000-0x00000000003E8000-memory.dmp

Filesize
32KB

Download
memory/864-54-0x0000000000110000-0x000000000017E000-memory.dmp

Filesize
440KB

Download
memory/864-55-0x00000000755A1000-0x00000000755A3000-memory.dmp

Filesize
8KB

Download
memory/1728-73-0x0000000000000000-mapping.dmp

Download
memory/1956-58-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads