agenttesla | 0ffd3cc8c5628fff810737b47b2788735af8281dd86c2a6b1695868cfc53eae2

General

Target

Purchase Sheet 2020.exe
Size

611KB
MD5

a6619cf730f2e03c81aeb9fefcd70778
SHA1

2dca6afaf991614515c6f4fa59ce32460e0872e4
SHA256

f4ce706bea83c92bea67552077d4b3d9c1d1d58add3d8a53763cd5def3b23138
SHA512

18330333e39596142bada9d13a039e7390946e736f3e214affa626df2ac29eebfa7a0eff9743a2d92d4d1daded98f7eddd6d916874087b9bcf0ac986283c1e25

Score

10^/10

agenttesla collection coreentity evasion keylogger persistence rezer0 spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
smtp.mail.ru
Port:
587
Username:
mikhiliovsergey@mail.ru
Password:
godwill12

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/1080-57-0x0000000000540000-0x0000000000548000-memory.dmp	coreentity

AgentTesla Payload 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/540-65-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/540-64-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/540-66-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/540-67-0x000000000044CF4E-mapping.dmp	family_agenttesla
behavioral1/memory/540-69-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/540-71-0x0000000000400000-0x0000000000452000-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/1080-58-0x00000000020C0000-0x000000000211A000-memory.dmp	rezer0

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:

Purchase Sheet 2020.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Purchase Sheet 2020.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Purchase Sheet 2020.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:

Purchase Sheet 2020.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	Purchase Sheet 2020.exe
Key opened	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Purchase Sheet 2020.exe
Key opened	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Purchase Sheet 2020.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Purchase Sheet 2020.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows\CurrentVersion\Run\newapp = "C:\\Users\\Admin\\AppData\\Roaming\\newapp\\newapp.exe"	Purchase Sheet 2020.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:

Purchase Sheet 2020.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	Purchase Sheet 2020.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	Purchase Sheet 2020.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

Purchase Sheet 2020.exe

description pid process target process

PID 1080 set thread context of 540 1080 Purchase Sheet 2020.exe Purchase Sheet 2020.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

1896 schtasks.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

Purchase Sheet 2020.exe

pid process

540 Purchase Sheet 2020.exe
540 Purchase Sheet 2020.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Purchase Sheet 2020.exe

description pid process

Token: SeDebugPrivilege 540 Purchase Sheet 2020.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Purchase Sheet 2020.exe

pid process

540 Purchase Sheet 2020.exe

description	pid	process	target process
PID 1080 set thread context of 540	1080	Purchase Sheet 2020.exe	Purchase Sheet 2020.exe

pid	process
1896	schtasks.exe

pid	process
540	Purchase Sheet 2020.exe
540	Purchase Sheet 2020.exe

description	pid	process
Token: SeDebugPrivilege	540	Purchase Sheet 2020.exe

pid	process
540	Purchase Sheet 2020.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

Purchase Sheet 2020.exePurchase Sheet 2020.exe

description	pid	process	target process
PID 1080 wrote to memory of 1896	1080	Purchase Sheet 2020.exe	schtasks.exe
PID 1080 wrote to memory of 1896	1080	Purchase Sheet 2020.exe	schtasks.exe
PID 1080 wrote to memory of 1896	1080	Purchase Sheet 2020.exe	schtasks.exe
PID 1080 wrote to memory of 1896	1080	Purchase Sheet 2020.exe	schtasks.exe
PID 1080 wrote to memory of 540	1080	Purchase Sheet 2020.exe	Purchase Sheet 2020.exe
PID 1080 wrote to memory of 540	1080	Purchase Sheet 2020.exe	Purchase Sheet 2020.exe
PID 1080 wrote to memory of 540	1080	Purchase Sheet 2020.exe	Purchase Sheet 2020.exe
PID 1080 wrote to memory of 540	1080	Purchase Sheet 2020.exe	Purchase Sheet 2020.exe
PID 1080 wrote to memory of 540	1080	Purchase Sheet 2020.exe	Purchase Sheet 2020.exe
PID 1080 wrote to memory of 540	1080	Purchase Sheet 2020.exe	Purchase Sheet 2020.exe
PID 1080 wrote to memory of 540	1080	Purchase Sheet 2020.exe	Purchase Sheet 2020.exe
PID 1080 wrote to memory of 540	1080	Purchase Sheet 2020.exe	Purchase Sheet 2020.exe
PID 1080 wrote to memory of 540	1080	Purchase Sheet 2020.exe	Purchase Sheet 2020.exe
PID 540 wrote to memory of 2020	540	Purchase Sheet 2020.exe	netsh.exe
PID 540 wrote to memory of 2020	540	Purchase Sheet 2020.exe	netsh.exe
PID 540 wrote to memory of 2020	540	Purchase Sheet 2020.exe	netsh.exe
PID 540 wrote to memory of 2020	540	Purchase Sheet 2020.exe	netsh.exe

outlook_office_path 1 IoCs

Processes:

Purchase Sheet 2020.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	Purchase Sheet 2020.exe

outlook_win_path 1 IoCs

Processes:

Purchase Sheet 2020.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	Purchase Sheet 2020.exe

C:\Users\Admin\AppData\Local\Temp\Purchase Sheet 2020.exe
"C:\Users\Admin\AppData\Local\Temp\Purchase Sheet 2020.exe"
1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1080

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\DjONpRxSguIdQr" /XML "C:\Users\Admin\AppData\Local\Temp\tmp82D7.tmp"
2⤵
- Creates scheduled task(s)
PID:1896

C:\Users\Admin\AppData\Local\Temp\Purchase Sheet 2020.exe
"{path}"
2⤵
- 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:540

C:\Windows\SysWOW64\netsh.exe
"netsh" wlan show profile
3⤵
PID:2020

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

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\tmp82D7.tmp
Filesize
1KB

MD5
c91991bef1e52ba05bc04a8cdb057b07

SHA1
8983d2ff174f1d26c42a0e7a5cbed75cd3e74e36

SHA256
3f5971b085ecf8c2e5b9ffc0fc4d72f534a50a89e5c4dedebf670c26a7239db3

SHA512
e39c8dcced111a0584f63c2c9a75bac69011aca4cdb134d3f2dd2d4d21448a70d915675852685808d5d1ccccbb0b60e5f14310e76c42482f697c2ea6017ceb5d

Download Submit
memory/540-67-0x000000000044CF4E-mapping.dmp

Download
memory/540-66-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/540-71-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/540-69-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/540-62-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/540-64-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/540-61-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/540-65-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1080-56-0x0000000074DC1000-0x0000000074DC3000-memory.dmp

Filesize
8KB

Download
memory/1080-55-0x00000000006F0000-0x0000000000750000-memory.dmp

Filesize
384KB

Download
memory/1080-54-0x0000000000900000-0x00000000009A0000-memory.dmp

Filesize
640KB

Download
memory/1080-58-0x00000000020C0000-0x000000000211A000-memory.dmp

Filesize
360KB

Download
memory/1080-57-0x0000000000540000-0x0000000000548000-memory.dmp

Filesize
32KB

Download
memory/1896-59-0x0000000000000000-mapping.dmp

Download
memory/2020-73-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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