agenttesla | 4b3b8f1f6ab69340cea4c78f21cb691e6efdb3ede2973a6315e947b281ea25c8

Analysis

max time kernel
77s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
09/05/2022, 03:23

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General

Target
SY.exe
Size 554KB
Sample220509-dxfx5afbbm
SHA256 4b3b8f1f6ab69340cea4c78f21cb691e6efdb3ede2973a6315e947b281ea25c8
MD5 a42e21f52fd1f78f98ba16a20ce311c4
SHA1 4060cd84567213393793efcd6179bff3e7280069
SHA512 d25149ec254b4eaaaf7af4d7fc123be02ff81c08cfc0e58729d5fbf6e1dcafc69f9b597430a8bad5408fb18fe9180600a39fbcefd193a9805310d38b23b19bec
MD5 SHA1 SHA512

Score

10^/10

agenttesla collection keylogger persistence spyware stealer suricata trojan

Malware Config

Extracted

Credentials

Protocol
smtp
Host
mail.ocenmasters.com
Port
587
Username
[email protected]
Password
donblack12345

Extracted

Family

agenttesla

Credentials

Protocol
smtp
Host
mail.ocenmasters.com
Port
587
Username
[email protected]
Password
donblack12345
Email to
[email protected]

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
suricata: ET MALWARE AgentTesla Exfil Via SMTP
suricata: ET MALWARE AgentTesla Exfil Via SMTP
suricata

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	SY.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-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	SY.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-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	SY.exe
Key opened	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	SY.exe
Key opened	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	SY.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-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yqWDN = "C:\\Users\\Admin\\AppData\\Roaming\\yqWDN\\yqWDN.exe"	SY.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4668 set thread context of 4216	4668	SY.exe	94

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
872	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
4668	SY.exe
4216	SY.exe
4216	SY.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4668	SY.exe
Token: SeDebugPrivilege	4216	SY.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 4668 wrote to memory of 872	4668	SY.exe	92
PID 4668 wrote to memory of 872	4668	SY.exe	92
PID 4668 wrote to memory of 872	4668	SY.exe	92
PID 4668 wrote to memory of 4216	4668	SY.exe	94
PID 4668 wrote to memory of 4216	4668	SY.exe	94
PID 4668 wrote to memory of 4216	4668	SY.exe	94
PID 4668 wrote to memory of 4216	4668	SY.exe	94
PID 4668 wrote to memory of 4216	4668	SY.exe	94
PID 4668 wrote to memory of 4216	4668	SY.exe	94
PID 4668 wrote to memory of 4216	4668	SY.exe	94
PID 4668 wrote to memory of 4216	4668	SY.exe	94

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	SY.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	SY.exe

C:\Users\Admin\AppData\Local\Temp\SY.exe
"C:\Users\Admin\AppData\Local\Temp\SY.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4668
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\klklsqjln" /XML "C:\Users\Admin\AppData\Local\Temp\tmp151E.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:872
- C:\Users\Admin\AppData\Local\Temp\SY.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:4216

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

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

SY.exe.log

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

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tmp151E.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmp151E.tmp
Size 1KB
SHA256 37f25c5f3c19d786765f4efd52eed65ae0e93836e60b2ac0d54bb11d7c3279e9
MD5 fc46f56576ae4ac1d2eb5e642ac6e25b
SHA1 d3df933de4497047c524a57bfb27a5c2e53564ad
SHA512 59c4f5277391cbc560559d4bf12a5f59abddd3f6074ec67a4fad84876fea9c3d7105bf8866abcb1eb16e78947e26932e549528a82df2e13be0eb65b64057cf93
MD5 SHA1 SHA512

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memory/4216-138-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/4216-140-0x0000000005B70000-0x0000000005BD6000-memory.dmp

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memory/4216-141-0x0000000006280000-0x00000000062D0000-memory.dmp

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memory/4668-130-0x0000000000B80000-0x0000000000C10000-memory.dmp

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memory/4668-131-0x0000000005AF0000-0x0000000006094000-memory.dmp

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memory/4668-132-0x00000000055E0000-0x0000000005672000-memory.dmp

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memory/4668-133-0x0000000005680000-0x000000000571C000-memory.dmp

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memory/4668-134-0x00000000055A0000-0x00000000055AA000-memory.dmp

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