agenttesla | bfd76294477fc3da608954591e071f3745274fec1ca01bb77cb3534a5eb45b1f

Analysis

max time kernel
145s
max time network
186s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
19/04/2022, 04:06

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General

Target
invoice.exe
Size 505KB
Sample220419-en3afaeeg5
SHA256 bfd76294477fc3da608954591e071f3745274fec1ca01bb77cb3534a5eb45b1f
MD5 04a0e70abe7dac63f00f514d6a4a03a3
SHA1 4484a7db88b2d5809e7aec8d324044d65f1270ce
SHA512 f47d4ffcad8b57d6253aa435bc98415ba616f11adbdd3120ec7d46e7df058f4467cdd87888b46631bedbbfa8653151f4a7f06c6eb0d1d3869b3d8315828a45f5
MD5 SHA1 SHA512

Score

10^/10

agenttesla collection keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol
smtp
Host
mail.majulah.com.sg
Port
587
Username
[email protected]
Password
P@ssword12345
Email to
[email protected]

Signatures

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

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	invoice.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-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	invoice.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

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	invoice.exe
Key opened	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	invoice.exe
Key opened	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	invoice.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2036 set thread context of 1908	2036	invoice.exe	82

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
1544	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2036	invoice.exe
1908	invoice.exe
1908	invoice.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2036	invoice.exe
Token: SeDebugPrivilege	1908	invoice.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2036 wrote to memory of 1544	2036	invoice.exe	80
PID 2036 wrote to memory of 1544	2036	invoice.exe	80
PID 2036 wrote to memory of 1544	2036	invoice.exe	80
PID 2036 wrote to memory of 1908	2036	invoice.exe	82
PID 2036 wrote to memory of 1908	2036	invoice.exe	82
PID 2036 wrote to memory of 1908	2036	invoice.exe	82
PID 2036 wrote to memory of 1908	2036	invoice.exe	82
PID 2036 wrote to memory of 1908	2036	invoice.exe	82
PID 2036 wrote to memory of 1908	2036	invoice.exe	82
PID 2036 wrote to memory of 1908	2036	invoice.exe	82
PID 2036 wrote to memory of 1908	2036	invoice.exe	82

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	invoice.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	invoice.exe

C:\Users\Admin\AppData\Local\Temp\invoice.exe
"C:\Users\Admin\AppData\Local\Temp\invoice.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2036
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ZDnvlZpFrsyjH" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7138.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1544
- C:\Users\Admin\AppData\Local\Temp\invoice.exe
  "{path}"
  2⤵
  - Drops file in Drivers directory
  - Accesses Microsoft Outlook profiles
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:1908

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

invoice.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\invoice.exe.log
Size 1KB
SHA256 e16024b092a026a9dc00df69d4b9bbcab7b2dc178dc5291fc308a1abc9304a99
MD5 84e77a587d94307c0ac1357eb4d3d46f
SHA1 83cc900f9401f43d181207d64c5adba7a85edc1e
SHA512 aefb5c62200b3ed97718d20a89990954d4d8acdc0a6a73c5a420f1bba619cb79e70c2cd0a579b9f52dc6b09e1de2cea6cd6cac4376cfee92d94e2c01d310f691
MD5 SHA1 SHA512

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tmp7138.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmp7138.tmp
Size 1KB
SHA256 5babfddb10cb4a51d3da1c674847f326e0ada8f09caec73068cc628a37ef8db7
MD5 23928764e74fcd4f35fbe690d503c466
SHA1 eb2dba0d7ee85df1d2c5c3f49ad5659200544d0b
SHA512 1774a6a082581630cfd7618378e953e5451de651ee1562c301ceee2875ea637752cff8b5858bca51da0baf67a90a8384a78708053af6202de4210efe7626d26a
MD5 SHA1 SHA512

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memory/1908-139-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/1908-141-0x00000000063D0000-0x0000000006436000-memory.dmp

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memory/1908-142-0x00000000068D0000-0x0000000006920000-memory.dmp

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memory/2036-131-0x0000000000DB0000-0x0000000000E34000-memory.dmp

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memory/2036-132-0x0000000005E30000-0x00000000063D4000-memory.dmp

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memory/2036-133-0x00000000057D0000-0x0000000005862000-memory.dmp

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memory/2036-134-0x0000000005920000-0x00000000059BC000-memory.dmp

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memory/2036-135-0x0000000005880000-0x000000000588A000-memory.dmp

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