agenttesla | 4efcdd9e4c353a68452978906c7471675a6a6cd4e835313a9b88c9171a3a5de2

General

Target
Overdue_Payments.exe
Size 846KB
Sample220414-rpkg8sffa2
SHA256 c7a6ab6e5b40c85b90ff5ae27e76ac3cfb614c20ff0388bdf949401dfb5dfab0
MD5 8800aaa1cd99b2d824508ea848f6fe7c
SHA1 c839657da9e94e1c2c8d06044f3171cdd38956e0
SHA512 d14e5f4daec11af214d9a5f3ec13dc4a3448f1a86dbbaa62d61ea282a0712ad88f8ae5dfa9828ea77ee16abdb8a1121513984c07ca3c6ef75fc3ff4c480961a2
MD5 SHA1 SHA512

Score

10^/10

agenttesla collection keylogger persistence spyware stealer trojan

Malware Config

Extracted

Credentials

Protocol
smtp
Host
webmail.mdist.us
Port
587
Username
[email protected]
Password
Info#4321

Extracted

Family

agenttesla

Credentials

Protocol
smtp
Host
webmail.mdist.us
Port
587
Username
[email protected]
Password
Info#4321

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	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-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation	Overdue_Payments.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\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-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\tbKkO = "C:\\Users\\Admin\\AppData\\Roaming\\tbKkO\\tbKkO.exe"	RegSvcs.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1556 set thread context of 4760	1556	Overdue_Payments.exe	90

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
508	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1556	Overdue_Payments.exe
4760	RegSvcs.exe
4760	RegSvcs.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1556	Overdue_Payments.exe
Token: SeDebugPrivilege	4760	RegSvcs.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1556 wrote to memory of 508	1556	Overdue_Payments.exe	88
PID 1556 wrote to memory of 508	1556	Overdue_Payments.exe	88
PID 1556 wrote to memory of 508	1556	Overdue_Payments.exe	88
PID 1556 wrote to memory of 4760	1556	Overdue_Payments.exe	90
PID 1556 wrote to memory of 4760	1556	Overdue_Payments.exe	90
PID 1556 wrote to memory of 4760	1556	Overdue_Payments.exe	90
PID 1556 wrote to memory of 4760	1556	Overdue_Payments.exe	90
PID 1556 wrote to memory of 4760	1556	Overdue_Payments.exe	90
PID 1556 wrote to memory of 4760	1556	Overdue_Payments.exe	90
PID 1556 wrote to memory of 4760	1556	Overdue_Payments.exe	90
PID 1556 wrote to memory of 4760	1556	Overdue_Payments.exe	90

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe

C:\Users\Admin\AppData\Local\Temp\Overdue_Payments.exe
"C:\Users\Admin\AppData\Local\Temp\Overdue_Payments.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1556
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\CbguAttq" /XML "C:\Users\Admin\AppData\Local\Temp\tmpAAA5.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:508
- 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:4760

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

tmpAAA5.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpAAA5.tmp
Size 1KB
SHA256 b1436ba400c3c8555285dd865d72ef3d4c8258c99829ef0c918b85a3aa9ddea0
MD5 356215965c332818915f6b8bad9f055a
SHA1 55402c0ce61c6428b1c9fe50df769b73b3616365
SHA512 af285b54f11077e1ffdb0bdac2ce9b74295a1275859c55b3bc2f55695fc95bba9ecaad6547a784b71c8b6f92e62933b1030e869e42af2a9dbf0bd26444477380
MD5 SHA1 SHA512

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memory/1556-130-0x0000000000BC0000-0x0000000000C9A000-memory.dmp

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memory/1556-131-0x0000000005BB0000-0x0000000006154000-memory.dmp

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memory/1556-132-0x00000000056A0000-0x0000000005732000-memory.dmp

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memory/1556-133-0x0000000005740000-0x00000000057DC000-memory.dmp

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memory/1556-134-0x0000000005620000-0x000000000562A000-memory.dmp

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memory/4760-138-0x0000000000400000-0x000000000046E000-memory.dmp

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memory/4760-139-0x0000000006120000-0x0000000006186000-memory.dmp

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memory/4760-140-0x00000000067D0000-0x0000000006820000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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