agenttesla | 6a0cdf63baad32236d845d0027822d4e9c67ac4f9bddd9933ada09f9811dbca5

Analysis

max time kernel
150s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
20/05/2022, 21:55

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General

Target
documents.exe
Size 791KB
Sample220520-1srkdshdfp
SHA256 6a0cdf63baad32236d845d0027822d4e9c67ac4f9bddd9933ada09f9811dbca5
MD5 425d7d79e7b8a6b79890453f242f830b
SHA1 b1dbeb640fd5853906014f923bd10ab82832c717
SHA512 51c93e7b771c09f9a1bdaaf0191598eb5a95b6cac49e2bd2ab34d613e6607dc8a6d85537494d382c85d16778298e3f25d60652542795f9158e506a4519e1ba05
MD5 SHA1 SHA512

Score

10^/10

agenttesla collection keylogger persistence spyware stealer suricata trojan

Malware Config

Extracted

Credentials

Protocol
smtp
Host
mail.subnet-group.com
Port
587
Username
[email protected]
Password
cr0cksh1t

Extracted

Family

agenttesla

Credentials

Protocol
smtp
Host
mail.subnet-group.com
Port
587
Username
[email protected]
Password
cr0cksh1t
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	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-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	documents.exe

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	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Office\16.0\Outlook\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-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Tnpak = "C:\\Users\\Admin\\AppData\\Roaming\\Tnpak\\Tnpak.exe"	RegSvcs.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3900 set thread context of 4956	3900	documents.exe	85

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
1516	schtasks.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
3900	documents.exe
3900	documents.exe
3900	documents.exe
4328	powershell.exe
4956	RegSvcs.exe
4956	RegSvcs.exe
4328	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3900	documents.exe
Token: SeDebugPrivilege	4328	powershell.exe
Token: SeDebugPrivilege	4956	RegSvcs.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3900 wrote to memory of 4328	3900	documents.exe	81
PID 3900 wrote to memory of 4328	3900	documents.exe	81
PID 3900 wrote to memory of 4328	3900	documents.exe	81
PID 3900 wrote to memory of 1516	3900	documents.exe	83
PID 3900 wrote to memory of 1516	3900	documents.exe	83
PID 3900 wrote to memory of 1516	3900	documents.exe	83
PID 3900 wrote to memory of 4956	3900	documents.exe	85
PID 3900 wrote to memory of 4956	3900	documents.exe	85
PID 3900 wrote to memory of 4956	3900	documents.exe	85
PID 3900 wrote to memory of 4956	3900	documents.exe	85
PID 3900 wrote to memory of 4956	3900	documents.exe	85
PID 3900 wrote to memory of 4956	3900	documents.exe	85
PID 3900 wrote to memory of 4956	3900	documents.exe	85
PID 3900 wrote to memory of 4956	3900	documents.exe	85

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	RegSvcs.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	RegSvcs.exe

C:\Users\Admin\AppData\Local\Temp\documents.exe
"C:\Users\Admin\AppData\Local\Temp\documents.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3900
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\PnxlrYrQ.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4328
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\PnxlrYrQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp50A0.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1516
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
  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:4956

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

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

tmp50A0.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmp50A0.tmp
Size 1KB
SHA256 0fa9978a6817e101865c00b0ee71e494fb3d70bd3de1f66d8176519188023f40
MD5 7c3412ddca76be34bf10bf5be8a6a523
SHA1 c20d495c236bd788ec9ff7d153a620bbcf7217af
SHA512 fc73bcd0f0fee3a3d40a46fd2df8006d74b0a6d0bbafc174e05f8c5b0fc2a631594aee8b8345bec7885e7fcb5fbbbdec2b8a16c082e1717dbcd43500c435129b
MD5 SHA1 SHA512

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memory/3900-131-0x0000000007F60000-0x0000000008504000-memory.dmp

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memory/3900-132-0x0000000007A70000-0x0000000007B02000-memory.dmp

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memory/3900-133-0x0000000007C00000-0x0000000007C0A000-memory.dmp

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memory/3900-134-0x0000000007E30000-0x0000000007ECC000-memory.dmp

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memory/3900-135-0x000000000A780000-0x000000000A7E6000-memory.dmp

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memory/3900-130-0x0000000000B40000-0x0000000000C0A000-memory.dmp

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memory/4328-148-0x0000000006270000-0x000000000628E000-memory.dmp

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memory/4328-147-0x0000000070CE0000-0x0000000070D2C000-memory.dmp

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memory/4328-140-0x0000000004ED0000-0x00000000054F8000-memory.dmp

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memory/4328-156-0x00000000072F0000-0x00000000072F8000-memory.dmp

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memory/4328-155-0x0000000007310000-0x000000000732A000-memory.dmp

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memory/4328-143-0x0000000004BF0000-0x0000000004C12000-memory.dmp

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memory/4328-144-0x0000000005500000-0x0000000005566000-memory.dmp

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memory/4328-145-0x0000000005CD0000-0x0000000005CEE000-memory.dmp

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memory/4328-146-0x0000000006CC0000-0x0000000006CF2000-memory.dmp

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memory/4328-138-0x00000000023C0000-0x00000000023F6000-memory.dmp

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memory/4328-149-0x0000000007630000-0x0000000007CAA000-memory.dmp

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memory/4328-150-0x0000000006FD0000-0x0000000006FEA000-memory.dmp

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memory/4328-151-0x0000000007040000-0x000000000704A000-memory.dmp

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memory/4328-154-0x0000000007200000-0x000000000720E000-memory.dmp

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memory/4328-153-0x0000000007250000-0x00000000072E6000-memory.dmp

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memory/4956-152-0x0000000006430000-0x0000000006480000-memory.dmp

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memory/4956-142-0x0000000000400000-0x000000000043A000-memory.dmp

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