agenttesla | 4397420c0db71a117903ac5be006c050d5dbd3d2d3c2e574aa02ba5480ed955b

General

Target

pictures.scr
Size

637KB
MD5

0879e42f499d25bc6651cef6c74e2c42
SHA1

08c604275d3faafa8b6fed5a26399dc0010f8964
SHA256

ff556834b215cb5dc865342178c6e15e015cee26d4b601710c58264c5c76ba21
SHA512

b56b2daacca231c7c6fc9db0062d8a81fbb1524b0d9909d39af9be0a24bd484ac03ad5f00597846ae968c62547af04821b41d9eff9971fe09da646d8d1ad2ecc

Score

10^/10

agenttesla collection keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
bh-31.webhostbox.net
Port:
587
Username:
[email protected]
Password:
*JP9uoO%;M%Z

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla

AgentTesla Payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3456-140-0x0000000000400000-0x000000000044A000-memory.dmp	family_agenttesla

Executes dropped EXE 2 IoCs

Processes:

computer.exeRegAsm.exe

pid process

1960 computer.exe
3456 RegAsm.exe

pid	process
1960	computer.exe
3456	RegAsm.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

pictures.scr

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	pictures.scr

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:

RegAsm.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

reg.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\computer = "C:\\Windows\\system32\\pcalua.exe -a C:\\Users\\Admin\\AppData\\Roaming\\computer.exe"	reg.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

computer.exe

description pid process target process

PID 1960 set thread context of 3456 1960 computer.exe RegAsm.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	pid	process	target process
PID 1960 set thread context of 3456	1960	computer.exe	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 29 IoCs

Processes:

pictures.scrcomputer.exeRegAsm.exe

pid	process
4476	pictures.scr
4476	pictures.scr
4476	pictures.scr
4476	pictures.scr
4476	pictures.scr
4476	pictures.scr
4476	pictures.scr
4476	pictures.scr
4476	pictures.scr
4476	pictures.scr
4476	pictures.scr
4476	pictures.scr
4476	pictures.scr
4476	pictures.scr
4476	pictures.scr
4476	pictures.scr
4476	pictures.scr
4476	pictures.scr
4476	pictures.scr
4476	pictures.scr
4476	pictures.scr
4476	pictures.scr
4476	pictures.scr
4476	pictures.scr
1960	computer.exe
1960	computer.exe
1960	computer.exe
3456	RegAsm.exe
3456	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

pictures.scrcomputer.exeRegAsm.exe

description pid process

Token: SeDebugPrivilege 4476 pictures.scr
Token: SeDebugPrivilege 1960 computer.exe
Token: SeDebugPrivilege 3456 RegAsm.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

RegAsm.exe

pid process

3456 RegAsm.exe

description	pid	process
Token: SeDebugPrivilege	4476	pictures.scr
Token: SeDebugPrivilege	1960	computer.exe
Token: SeDebugPrivilege	3456	RegAsm.exe

pid	process
3456	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

pictures.scrcmd.execomputer.exe

description	pid	process	target process
PID 4476 wrote to memory of 2676	4476	pictures.scr	cmd.exe
PID 4476 wrote to memory of 2676	4476	pictures.scr	cmd.exe
PID 4476 wrote to memory of 2676	4476	pictures.scr	cmd.exe
PID 2676 wrote to memory of 4196	2676	cmd.exe	reg.exe
PID 2676 wrote to memory of 4196	2676	cmd.exe	reg.exe
PID 2676 wrote to memory of 4196	2676	cmd.exe	reg.exe
PID 4476 wrote to memory of 1960	4476	pictures.scr	computer.exe
PID 4476 wrote to memory of 1960	4476	pictures.scr	computer.exe
PID 4476 wrote to memory of 1960	4476	pictures.scr	computer.exe
PID 1960 wrote to memory of 3456	1960	computer.exe	RegAsm.exe
PID 1960 wrote to memory of 3456	1960	computer.exe	RegAsm.exe
PID 1960 wrote to memory of 3456	1960	computer.exe	RegAsm.exe
PID 1960 wrote to memory of 3456	1960	computer.exe	RegAsm.exe
PID 1960 wrote to memory of 3456	1960	computer.exe	RegAsm.exe
PID 1960 wrote to memory of 3456	1960	computer.exe	RegAsm.exe
PID 1960 wrote to memory of 3456	1960	computer.exe	RegAsm.exe
PID 1960 wrote to memory of 3456	1960	computer.exe	RegAsm.exe

outlook_office_path 1 IoCs

Processes:

RegAsm.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

outlook_win_path 1 IoCs

Processes:

RegAsm.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\pictures.scr
"C:\Users\Admin\AppData\Local\Temp\pictures.scr" /S
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4476

C:\Windows\SysWOW64\cmd.exe
"cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v computer /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\computer.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:2676

C:\Windows\SysWOW64\reg.exe
REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v computer /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\computer.exe"
3⤵
- Adds Run key to start application
PID:4196

C:\Users\Admin\AppData\Roaming\computer.exe
"C:\Users\Admin\AppData\Roaming\computer.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1960

C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
"C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"
3⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
PID:3456

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

2

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
Filesize
63KB

MD5
0d5df43af2916f47d00c1573797c1a13

SHA1
230ab5559e806574d26b4c20847c368ed55483b0

SHA256
c066aee7aa3aa83f763ebc5541daa266ed6c648fbffcde0d836a13b221bb2adc

SHA512
f96cf9e1890746b12daf839a6d0f16f062b72c1b8a40439f96583f242980f10f867720232a6fa0f7d4d7ac0a7a6143981a5a130d6417ea98b181447134c7cfe2

Download Submit
C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
Filesize
63KB

MD5
0d5df43af2916f47d00c1573797c1a13

SHA1
230ab5559e806574d26b4c20847c368ed55483b0

SHA256
c066aee7aa3aa83f763ebc5541daa266ed6c648fbffcde0d836a13b221bb2adc

SHA512
f96cf9e1890746b12daf839a6d0f16f062b72c1b8a40439f96583f242980f10f867720232a6fa0f7d4d7ac0a7a6143981a5a130d6417ea98b181447134c7cfe2

Download Submit
C:\Users\Admin\AppData\Roaming\computer.exe
Filesize
637KB

MD5
0879e42f499d25bc6651cef6c74e2c42

SHA1
08c604275d3faafa8b6fed5a26399dc0010f8964

SHA256
ff556834b215cb5dc865342178c6e15e015cee26d4b601710c58264c5c76ba21

SHA512
b56b2daacca231c7c6fc9db0062d8a81fbb1524b0d9909d39af9be0a24bd484ac03ad5f00597846ae968c62547af04821b41d9eff9971fe09da646d8d1ad2ecc

Download Submit
C:\Users\Admin\AppData\Roaming\computer.exe
Filesize
637KB

MD5
0879e42f499d25bc6651cef6c74e2c42

SHA1
08c604275d3faafa8b6fed5a26399dc0010f8964

SHA256
ff556834b215cb5dc865342178c6e15e015cee26d4b601710c58264c5c76ba21

SHA512
b56b2daacca231c7c6fc9db0062d8a81fbb1524b0d9909d39af9be0a24bd484ac03ad5f00597846ae968c62547af04821b41d9eff9971fe09da646d8d1ad2ecc

Download Submit
memory/1960-136-0x0000000000000000-mapping.dmp

Download
memory/2676-134-0x0000000000000000-mapping.dmp

Download
memory/3456-143-0x0000000005BF0000-0x0000000005C8C000-memory.dmp

Filesize
624KB

Download
memory/3456-139-0x0000000000000000-mapping.dmp

Download
memory/3456-140-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/3456-144-0x0000000006830000-0x0000000006896000-memory.dmp

Filesize
408KB

Download
memory/3456-145-0x0000000006E10000-0x0000000006E60000-memory.dmp

Filesize
320KB

Download
memory/3456-146-0x0000000006DC0000-0x0000000006DCA000-memory.dmp

Filesize
40KB

Download
memory/4196-135-0x0000000000000000-mapping.dmp

Download
memory/4476-133-0x0000000002E50000-0x0000000002E94000-memory.dmp

Filesize
272KB

Download
memory/4476-130-0x0000000000B00000-0x0000000000BA6000-memory.dmp

Filesize
664KB

Download
memory/4476-132-0x0000000007BA0000-0x0000000007C32000-memory.dmp

Filesize
584KB

Download
memory/4476-131-0x00000000080B0000-0x0000000008654000-memory.dmp

Filesize
5.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads