agenttesla | 3bcc71c7eb84ab3cbb2b28919cfe161ad1e809effb2b6095ea711835bb9b53f2

Analysis

max time kernel
118s
max time network
118s
platform
windows7_x64
resource
win7-en-20211208
submitted
31/01/2022, 15:24

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General

Target
5Q8pHbBGhl3t1rx.exe
Size 555KB
Sample220131-ss3cwshegn
SHA256 3bcc71c7eb84ab3cbb2b28919cfe161ad1e809effb2b6095ea711835bb9b53f2
MD5 18702466fcf46387625c080d4d745185
SHA1 defdf31ae9465f9c02cfaf3fb7508e185601e95a
SHA512 d95ca524abb776a3a78a87a0ed95735f4849ea49ad7fbeb13b21b919096032f21484231366c026877066fda24f8308e4492ca38cf02f8c2316dc8917b6fe8426
MD5 SHA1 SHA512

Score

10^/10

agenttesla evasion keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol
smtp
Host
smtp.hp-flep.com
Port
587
Username
[email protected]
Password
ABCboy123

Signatures

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

AgentTesla Payload 5 IoCs

resource	yara_rule
behavioral1/memory/1788-69-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/1788-70-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/1788-71-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/1788-72-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/852-73-0x0000000002490000-0x00000000030DA000-memory.dmp	family_agenttesla

Looks for VirtualBox Guest Additions in registry 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497
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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	5Q8pHbBGhl3t1rx.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	5Q8pHbBGhl3t1rx.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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	5Q8pHbBGhl3t1rx.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	5Q8pHbBGhl3t1rx.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1156 set thread context of 1788	1156	5Q8pHbBGhl3t1rx.exe	37

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

pid	Process
1020	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1156	5Q8pHbBGhl3t1rx.exe
1156	5Q8pHbBGhl3t1rx.exe
1788	5Q8pHbBGhl3t1rx.exe
1788	5Q8pHbBGhl3t1rx.exe
844	powershell.exe
852	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1156	5Q8pHbBGhl3t1rx.exe
Token: SeDebugPrivilege	1788	5Q8pHbBGhl3t1rx.exe
Token: SeDebugPrivilege	844	powershell.exe
Token: SeDebugPrivilege	852	powershell.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 1156 wrote to memory of 852	1156	5Q8pHbBGhl3t1rx.exe	28
PID 1156 wrote to memory of 852	1156	5Q8pHbBGhl3t1rx.exe	28
PID 1156 wrote to memory of 852	1156	5Q8pHbBGhl3t1rx.exe	28
PID 1156 wrote to memory of 852	1156	5Q8pHbBGhl3t1rx.exe	28
PID 1156 wrote to memory of 844	1156	5Q8pHbBGhl3t1rx.exe	32
PID 1156 wrote to memory of 844	1156	5Q8pHbBGhl3t1rx.exe	32
PID 1156 wrote to memory of 844	1156	5Q8pHbBGhl3t1rx.exe	32
PID 1156 wrote to memory of 844	1156	5Q8pHbBGhl3t1rx.exe	32
PID 1156 wrote to memory of 1020	1156	5Q8pHbBGhl3t1rx.exe	34
PID 1156 wrote to memory of 1020	1156	5Q8pHbBGhl3t1rx.exe	34
PID 1156 wrote to memory of 1020	1156	5Q8pHbBGhl3t1rx.exe	34
PID 1156 wrote to memory of 1020	1156	5Q8pHbBGhl3t1rx.exe	34
PID 1156 wrote to memory of 1724	1156	5Q8pHbBGhl3t1rx.exe	36
PID 1156 wrote to memory of 1724	1156	5Q8pHbBGhl3t1rx.exe	36
PID 1156 wrote to memory of 1724	1156	5Q8pHbBGhl3t1rx.exe	36
PID 1156 wrote to memory of 1724	1156	5Q8pHbBGhl3t1rx.exe	36
PID 1156 wrote to memory of 1788	1156	5Q8pHbBGhl3t1rx.exe	37
PID 1156 wrote to memory of 1788	1156	5Q8pHbBGhl3t1rx.exe	37
PID 1156 wrote to memory of 1788	1156	5Q8pHbBGhl3t1rx.exe	37
PID 1156 wrote to memory of 1788	1156	5Q8pHbBGhl3t1rx.exe	37
PID 1156 wrote to memory of 1788	1156	5Q8pHbBGhl3t1rx.exe	37
PID 1156 wrote to memory of 1788	1156	5Q8pHbBGhl3t1rx.exe	37
PID 1156 wrote to memory of 1788	1156	5Q8pHbBGhl3t1rx.exe	37
PID 1156 wrote to memory of 1788	1156	5Q8pHbBGhl3t1rx.exe	37
PID 1156 wrote to memory of 1788	1156	5Q8pHbBGhl3t1rx.exe	37

C:\Users\Admin\AppData\Local\Temp\5Q8pHbBGhl3t1rx.exe
"C:\Users\Admin\AppData\Local\Temp\5Q8pHbBGhl3t1rx.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:1156
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\5Q8pHbBGhl3t1rx.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:852
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\bnrtiLoQT.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:844
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\bnrtiLoQT" /XML "C:\Users\Admin\AppData\Local\Temp\tmpFA08.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1020
- C:\Users\Admin\AppData\Local\Temp\5Q8pHbBGhl3t1rx.exe
  "C:\Users\Admin\AppData\Local\Temp\5Q8pHbBGhl3t1rx.exe"
  2⤵
  PID:1724
- C:\Users\Admin\AppData\Local\Temp\5Q8pHbBGhl3t1rx.exe
  "C:\Users\Admin\AppData\Local\Temp\5Q8pHbBGhl3t1rx.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1788

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/844-66-0x0000000002300000-0x0000000002F4A000-memory.dmp

Download

memory/852-75-0x0000000002490000-0x00000000030DA000-memory.dmp

Download

memory/852-73-0x0000000002490000-0x00000000030DA000-memory.dmp

Download

memory/852-63-0x0000000002490000-0x00000000030DA000-memory.dmp

Download

memory/1156-58-0x0000000005380000-0x00000000053F0000-memory.dmp

Download

memory/1156-54-0x0000000000060000-0x00000000000F2000-memory.dmp

Download

memory/1156-57-0x00000000004D0000-0x00000000004E4000-memory.dmp

Download

memory/1156-56-0x0000000004DA0000-0x0000000004DA1000-memory.dmp

Download

memory/1156-55-0x00000000766D1000-0x00000000766D3000-memory.dmp

Download

memory/1788-67-0x0000000000400000-0x000000000043C000-memory.dmp

Download

memory/1788-68-0x0000000000400000-0x000000000043C000-memory.dmp

Download

memory/1788-69-0x0000000000400000-0x000000000043C000-memory.dmp

Download

memory/1788-70-0x0000000000400000-0x000000000043C000-memory.dmp

Download

memory/1788-71-0x0000000000400000-0x000000000043C000-memory.dmp

Download

memory/1788-72-0x0000000000400000-0x000000000043C000-memory.dmp

Download

memory/1788-74-0x0000000004970000-0x0000000004971000-memory.dmp

Download