agenttesla | 4047e8d1009ae3c5ff33ffef6a44fd1c412d95e8efd92fda99835a2df72580a4

General

Target
bp0.exe
Size 644KB
Sample220407-raznlsebbj
SHA256 4047e8d1009ae3c5ff33ffef6a44fd1c412d95e8efd92fda99835a2df72580a4
MD5 c18a4c9699a0d6d1e0691f46de6e9c2f
SHA1 635c684abf6e4a0a380be549cf19d468e1905d14
SHA512 47d45602b17337c44e5691e58514cc3926c6d8d87a424c9b8f9392485271659a9a8787f23d28005bc3f608565da56caa737d59d469239753cd774f273b980d13
MD5 SHA1 SHA512

Score

10^/10

agenttesla collection keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

C2

https://api.telegram.org/bot5160342877:AAG7aI_cOY3UzpErIEUdfVUJMJszvGYLIiI/sendDocument

Signatures

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

AgentTesla Payload 1 IoCs

resource	yara_rule
behavioral2/memory/4900-133-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	RegSvcs.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-157025953-3125636059-437143553-1000\Control Panel\International\Geo\Nation	bp0.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-157025953-3125636059-437143553-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-157025953-3125636059-437143553-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-157025953-3125636059-437143553-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-157025953-3125636059-437143553-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\NXLun = "C:\\Users\\Admin\\AppData\\Roaming\\NXLun\\NXLun.exe"	RegSvcs.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2240 set thread context of 4900	2240	bp0.exe	87

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
3428	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2240	bp0.exe
2240	bp0.exe
2240	bp0.exe
4900	RegSvcs.exe
4900	RegSvcs.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2240	bp0.exe
Token: SeDebugPrivilege	4900	RegSvcs.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2240 wrote to memory of 3428	2240	bp0.exe	84
PID 2240 wrote to memory of 3428	2240	bp0.exe	84
PID 2240 wrote to memory of 3428	2240	bp0.exe	84
PID 2240 wrote to memory of 1252	2240	bp0.exe	86
PID 2240 wrote to memory of 1252	2240	bp0.exe	86
PID 2240 wrote to memory of 1252	2240	bp0.exe	86
PID 2240 wrote to memory of 4900	2240	bp0.exe	87
PID 2240 wrote to memory of 4900	2240	bp0.exe	87
PID 2240 wrote to memory of 4900	2240	bp0.exe	87
PID 2240 wrote to memory of 4900	2240	bp0.exe	87
PID 2240 wrote to memory of 4900	2240	bp0.exe	87
PID 2240 wrote to memory of 4900	2240	bp0.exe	87
PID 2240 wrote to memory of 4900	2240	bp0.exe	87
PID 2240 wrote to memory of 4900	2240	bp0.exe	87

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-157025953-3125636059-437143553-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-157025953-3125636059-437143553-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe

C:\Users\Admin\AppData\Local\Temp\bp0.exe
"C:\Users\Admin\AppData\Local\Temp\bp0.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2240
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ErFxlqe" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2AE8.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:3428
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "{path}"
  2⤵
  PID:1252
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "{path}"
  2⤵
  - Drops file in Drivers directory
  - Accesses Microsoft Outlook profiles
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:4900

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

Scheduled Task

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

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Downloads

tmp2AE8.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmp2AE8.tmp
Size 1KB
SHA256 bf54e1cead8e92e9a6d21a4a9cd921ebdd9222d55f102d1f63dbde67cb5322aa
MD5 3ada296d3675b2ffa4362e1000b939e3
SHA1 7d4d3fe8dd82f845ac83680014eba3471288abe6
SHA512 9ef772e693beaaf7da81197c1acc9cc4e8765a36fb6027074bfda279d170f500a7dcde36d7e83b9b56f0cad303dfd87058ee8644c77e07a05995d64e850b18e6
MD5 SHA1 SHA512

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memory/2240-124-0x00000000008D0000-0x0000000000978000-memory.dmp

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memory/2240-125-0x0000000005800000-0x0000000005DA4000-memory.dmp

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memory/2240-126-0x0000000005330000-0x00000000053C2000-memory.dmp

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memory/2240-127-0x0000000005470000-0x000000000550C000-memory.dmp

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memory/2240-128-0x00000000053D0000-0x00000000053DA000-memory.dmp

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memory/4900-133-0x0000000000400000-0x000000000043C000-memory.dmp

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memory/4900-134-0x0000000006820000-0x0000000006886000-memory.dmp

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memory/4900-135-0x0000000001840000-0x0000000001890000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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