agenttesla | a073ccae277c0c119f279b338f6a84885bb6a65a1542c541eb0f72d89fdffc5f

General

Target

20200522.exe
Size

609KB
MD5

0b2e69a9195cd4f0aa610bcf0157e036
SHA1

c5d464f8f45234c967ad190f245391fca50addb2
SHA256

9c1aaf3c45fa0ef5dedb8d4c4eb369351813576318f866f6c0985ba072dd3494
SHA512

af52dba0f00232d5f348fdde3f3d4ce7aa264fb08d001fc3607327a452247df84fa6c2fb0c4b6a04fe791e1517d97d5f7a8d5d3ee7b50c996c2aa707744c6a1b

Score

10^/10

agenttesla collection coreentity evasion keylogger rezer0 spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.mail15.cp247.net
Port:
587
Username:
[email protected]
Password:
Mm8182

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/872-56-0x00000000004F0000-0x00000000004F8000-memory.dmp	coreentity

AgentTesla Payload 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/904-63-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral1/memory/904-64-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral1/memory/904-65-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral1/memory/904-66-0x000000000044B8EE-mapping.dmp	family_agenttesla
behavioral1/memory/904-70-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral1/memory/904-68-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla

CoreCCC Packer 1 IoCs

Detects CoreCCC packer used to load .NET malware.

Processes:

resource	yara_rule
behavioral1/memory/872-54-0x0000000001210000-0x00000000012AE000-memory.dmp	coreccc

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/872-57-0x00000000009E0000-0x0000000000A38000-memory.dmp	rezer0

Disables RegEdit via registry modification
evasion
Disables Task Manager via registry modification
evasion
Looks for VMWare Tools registry key 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

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:

20200522.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	20200522.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	20200522.exe

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

20200522.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	20200522.exe
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	20200522.exe
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	20200522.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:

20200522.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	20200522.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	20200522.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

20200522.exe

description pid process target process

PID 872 set thread context of 904 872 20200522.exe 20200522.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

1284 schtasks.exe
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

REG.exe

pid process

1688 REG.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

20200522.exe

pid process

904 20200522.exe
904 20200522.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

20200522.exe

description pid process

Token: SeDebugPrivilege 904 20200522.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

20200522.exe

pid process

904 20200522.exe

description	pid	process	target process
PID 872 set thread context of 904	872	20200522.exe	20200522.exe

pid	process
1284	schtasks.exe

pid	process
1688	REG.exe

pid	process
904	20200522.exe
904	20200522.exe

description	pid	process
Token: SeDebugPrivilege	904	20200522.exe

pid	process
904	20200522.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

20200522.exe20200522.exe

description	pid	process	target process
PID 872 wrote to memory of 1284	872	20200522.exe	schtasks.exe
PID 872 wrote to memory of 1284	872	20200522.exe	schtasks.exe
PID 872 wrote to memory of 1284	872	20200522.exe	schtasks.exe
PID 872 wrote to memory of 1284	872	20200522.exe	schtasks.exe
PID 872 wrote to memory of 904	872	20200522.exe	20200522.exe
PID 872 wrote to memory of 904	872	20200522.exe	20200522.exe
PID 872 wrote to memory of 904	872	20200522.exe	20200522.exe
PID 872 wrote to memory of 904	872	20200522.exe	20200522.exe
PID 872 wrote to memory of 904	872	20200522.exe	20200522.exe
PID 872 wrote to memory of 904	872	20200522.exe	20200522.exe
PID 872 wrote to memory of 904	872	20200522.exe	20200522.exe
PID 872 wrote to memory of 904	872	20200522.exe	20200522.exe
PID 872 wrote to memory of 904	872	20200522.exe	20200522.exe
PID 904 wrote to memory of 1688	904	20200522.exe	REG.exe
PID 904 wrote to memory of 1688	904	20200522.exe	REG.exe
PID 904 wrote to memory of 1688	904	20200522.exe	REG.exe
PID 904 wrote to memory of 1688	904	20200522.exe	REG.exe

outlook_office_path 1 IoCs

Processes:

20200522.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	20200522.exe

outlook_win_path 1 IoCs

Processes:

20200522.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	20200522.exe

C:\Users\Admin\AppData\Local\Temp\20200522.exe
"C:\Users\Admin\AppData\Local\Temp\20200522.exe"
1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:872

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\aqojsQwEorQJQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3D6F.tmp"
2⤵
- Creates scheduled task(s)
PID:1284

C:\Users\Admin\AppData\Local\Temp\20200522.exe
"{path}"
2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
PID:904

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:1688

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Modify Registry

1

T1112

Credential Access

Credentials in Files

3

T1081

Discovery

Query Registry

4

T1012

Virtualization/Sandbox Evasion

2

T1497

System Information Discovery

3

T1082

Peripheral Device Discovery

1

T1120

Lateral Movement

Collection

Data from Local System

3

T1005

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp3D6F.tmp
Filesize
1KB

MD5
f3f9240ede3204ed78a905957cb49ec9

SHA1
618a2a093b8cc0ca50f9eb5452a2c7c70b19a7f2

SHA256
42ad6d00c3fd41355ea1177eb338113b24d5529cfbefc90e806a4d3ba0ee12ac

SHA512
28530e4032018d3acec39a2400127987588122bbd2c926309e6cad8cd7283809d5cc14de19bace6fa0bf945418185d6da6b439f890b4ddbdc362fccc9dcff993

Download Submit
memory/872-55-0x0000000076721000-0x0000000076723000-memory.dmp

Filesize
8KB

Download
memory/872-56-0x00000000004F0000-0x00000000004F8000-memory.dmp

Filesize
32KB

Download
memory/872-57-0x00000000009E0000-0x0000000000A38000-memory.dmp

Filesize
352KB

Download
memory/872-54-0x0000000001210000-0x00000000012AE000-memory.dmp

Filesize
632KB

Download
memory/904-60-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/904-61-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/904-63-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/904-64-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/904-65-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/904-66-0x000000000044B8EE-mapping.dmp

Download
memory/904-70-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/904-68-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1284-58-0x0000000000000000-mapping.dmp

Download
memory/1688-72-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads