agenttesla | 70e30acf81923cadd480f66f2fc63a56987e6e402258c4f59c629ec345e28634

General

Target

FUND_APP.exe
Size

507KB
MD5

e174ddd754ba98495721027618f36ece
SHA1

17a964ea8949cedb839afbb9e851ab4442fee2bf
SHA256

d33efcce86a05a724b6238a4957a4ea348db0e01578b750919332fa4c6f96e21
SHA512

b39f58d6c7cf8069600bb3347aa130f93e61907bb54f1996942203b1ad1060557d0d33944f7366a59eafeb003bdaab7014af8a284ddc489e734108bf885d97ab

Score

10^/10

agenttesla collection coreentity evasion keylogger rezer0 spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
smtp.bubuyayaa.com
Port:
587
Username:
teamwork@bubuyayaa.com
Password:
bubuyaya007

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/1968-56-0x0000000000570000-0x0000000000578000-memory.dmp	coreentity

AgentTesla Payload 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/708-64-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/708-63-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/708-65-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/708-66-0x000000000044C9FE-mapping.dmp	family_agenttesla
behavioral1/memory/708-68-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/708-70-0x0000000000400000-0x0000000000452000-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/1968-57-0x0000000000800000-0x0000000000858000-memory.dmp	rezer0

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:

FUND_APP.exe

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

FUND_APP.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	FUND_APP.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	FUND_APP.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	FUND_APP.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:

FUND_APP.exe

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

Suspicious use of SetThreadContext 1 IoCs

Processes:

FUND_APP.exe

description pid process target process

PID 1968 set thread context of 708 1968 FUND_APP.exe FUND_APP.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

1960 schtasks.exe
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

REG.exe

pid process

1684 REG.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

FUND_APP.exeFUND_APP.exe

pid process

1968 FUND_APP.exe
708 FUND_APP.exe
708 FUND_APP.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

FUND_APP.exeFUND_APP.exe

description pid process

Token: SeDebugPrivilege 1968 FUND_APP.exe
Token: SeDebugPrivilege 708 FUND_APP.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

FUND_APP.exe

pid process

708 FUND_APP.exe

description	pid	process	target process
PID 1968 set thread context of 708	1968	FUND_APP.exe	FUND_APP.exe

pid	process
1960	schtasks.exe

pid	process
1684	REG.exe

pid	process
1968	FUND_APP.exe
708	FUND_APP.exe
708	FUND_APP.exe

description	pid	process
Token: SeDebugPrivilege	1968	FUND_APP.exe
Token: SeDebugPrivilege	708	FUND_APP.exe

pid	process
708	FUND_APP.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

FUND_APP.exeFUND_APP.exe

description	pid	process	target process
PID 1968 wrote to memory of 1960	1968	FUND_APP.exe	schtasks.exe
PID 1968 wrote to memory of 1960	1968	FUND_APP.exe	schtasks.exe
PID 1968 wrote to memory of 1960	1968	FUND_APP.exe	schtasks.exe
PID 1968 wrote to memory of 1960	1968	FUND_APP.exe	schtasks.exe
PID 1968 wrote to memory of 708	1968	FUND_APP.exe	FUND_APP.exe
PID 1968 wrote to memory of 708	1968	FUND_APP.exe	FUND_APP.exe
PID 1968 wrote to memory of 708	1968	FUND_APP.exe	FUND_APP.exe
PID 1968 wrote to memory of 708	1968	FUND_APP.exe	FUND_APP.exe
PID 1968 wrote to memory of 708	1968	FUND_APP.exe	FUND_APP.exe
PID 1968 wrote to memory of 708	1968	FUND_APP.exe	FUND_APP.exe
PID 1968 wrote to memory of 708	1968	FUND_APP.exe	FUND_APP.exe
PID 1968 wrote to memory of 708	1968	FUND_APP.exe	FUND_APP.exe
PID 1968 wrote to memory of 708	1968	FUND_APP.exe	FUND_APP.exe
PID 708 wrote to memory of 1684	708	FUND_APP.exe	REG.exe
PID 708 wrote to memory of 1684	708	FUND_APP.exe	REG.exe
PID 708 wrote to memory of 1684	708	FUND_APP.exe	REG.exe
PID 708 wrote to memory of 1684	708	FUND_APP.exe	REG.exe
PID 708 wrote to memory of 336	708	FUND_APP.exe	netsh.exe
PID 708 wrote to memory of 336	708	FUND_APP.exe	netsh.exe
PID 708 wrote to memory of 336	708	FUND_APP.exe	netsh.exe
PID 708 wrote to memory of 336	708	FUND_APP.exe	netsh.exe

outlook_office_path 1 IoCs

Processes:

FUND_APP.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	FUND_APP.exe

outlook_win_path 1 IoCs

Processes:

FUND_APP.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	FUND_APP.exe

C:\Users\Admin\AppData\Local\Temp\FUND_APP.exe
"C:\Users\Admin\AppData\Local\Temp\FUND_APP.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:1968

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\JxqEyamVS" /XML "C:\Users\Admin\AppData\Local\Temp\tmp95AC.tmp"
2⤵
- Creates scheduled task(s)
PID:1960

C:\Users\Admin\AppData\Local\Temp\FUND_APP.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:708

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:1684

C:\Windows\SysWOW64\netsh.exe
"netsh" wlan show profile
3⤵
PID:336

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\tmp95AC.tmp
Filesize
1KB

MD5
0b488eb83962b144dd0f165d410e06e2

SHA1
f0c790fbf843b481965cd7ce4b0af5a6b1d6e4ae

SHA256
2e4ff936a02a74813fcdaa39c53c22d15369918ec1d696a5a83d963693e36a59

SHA512
eda3b6ef7a99020af210bacd6846a5677a59320f10d86c4aec26b1dd0179938a2287e4fc4d086c390b8baf50f7936347eead9fe115f388856871e6d293aaf78d

Download Submit
memory/336-73-0x0000000000000000-mapping.dmp

Download
memory/708-68-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/708-63-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/708-70-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/708-66-0x000000000044C9FE-mapping.dmp

Download
memory/708-60-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/708-61-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/708-64-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/708-65-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1684-72-0x0000000000000000-mapping.dmp

Download
memory/1960-58-0x0000000000000000-mapping.dmp

Download
memory/1968-57-0x0000000000800000-0x0000000000858000-memory.dmp

Filesize
352KB

Download
memory/1968-56-0x0000000000570000-0x0000000000578000-memory.dmp

Filesize
32KB

Download
memory/1968-54-0x0000000001130000-0x00000000011B6000-memory.dmp

Filesize
536KB

Download
memory/1968-55-0x0000000075581000-0x0000000075583000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads