agenttesla | 4c61b7e22d734c70904acd8b8c64f5e40aa837729bbcec8d50f11addfb652963

General

Target
Payment Slip.exe
Size 1000KB
Sample200828-4r2ywbethx
SHA256 4c61b7e22d734c70904acd8b8c64f5e40aa837729bbcec8d50f11addfb652963
MD5 633f0c1408bad862b183c78a4c3d57f4
SHA1 2ecf1f52bbc221613b81e72c9f4326a3da27f77d
SHA512 00040d6fd2d3035fa7c7e99348e2c664d9e07833ce108129a2ea052206dd32e3edb99b6a4f3207579805e1c4b047c7eb9e1a0614362824ca6c4a767faff61c55
MD5 SHA1 SHA512

Score

10^/10

keylogger stealer spyware trojan agenttesla evasion

Malware Config

Extracted

Credentials

Protocol
smtp
Host
smtp.millndustries.com
Port
587
Username
[email protected]
Password
tomuchgrace05

Signatures

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

AgentTesla Payload 3 IoCs

keylogger stealer

resource	yara_rule
behavioral2/memory/3684-3-0x000000000046108E-mapping.dmp	agent_tesla
behavioral2/memory/3684-2-0x0000000000400000-0x0000000000466000-memory.dmp	agent_tesla
behavioral2/memory/3684-2-0x0000000000400000-0x0000000000466000-memory.dmp	agent_tesla

Looks for VirtualBox Guest Additions in registry 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497
Looks for VMWare Tools registry key 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Payment Slip.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Payment Slip.exe

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware

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

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

Data from Local System
T1005

Credentials in Files
T1081

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	Payment Slip.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum\0	Payment Slip.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3488 set thread context of 3684	3488	Payment Slip.exe	78

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\ServiceProfiles\LocalService\winhttp\cachev3.dat	svchost.exe

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
3084	schtasks.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	svchost.exe
Key created	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7\WpadDecisionReason = "1"	svchost.exe
Set value (data)	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7\WpadDecisionTime = 784be1ca157dd601	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7\WpadDecision = "0"	svchost.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3684	Payment Slip.exe
3684	Payment Slip.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeShutdownPrivilege	852	svchost.exe
Token: SeCreatePagefilePrivilege	852	svchost.exe
Token: SeDebugPrivilege	3684	Payment Slip.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3684	Payment Slip.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3488 wrote to memory of 3084	3488	Payment Slip.exe	76
PID 3488 wrote to memory of 3084	3488	Payment Slip.exe	76
PID 3488 wrote to memory of 3084	3488	Payment Slip.exe	76
PID 3488 wrote to memory of 3684	3488	Payment Slip.exe	78
PID 3488 wrote to memory of 3684	3488	Payment Slip.exe	78
PID 3488 wrote to memory of 3684	3488	Payment Slip.exe	78
PID 3488 wrote to memory of 3684	3488	Payment Slip.exe	78
PID 3488 wrote to memory of 3684	3488	Payment Slip.exe	78
PID 3488 wrote to memory of 3684	3488	Payment Slip.exe	78
PID 3488 wrote to memory of 3684	3488	Payment Slip.exe	78
PID 3488 wrote to memory of 3684	3488	Payment Slip.exe	78

C:\Users\Admin\AppData\Local\Temp\Payment Slip.exe
"C:\Users\Admin\AppData\Local\Temp\Payment Slip.exe"
1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3488
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\IRVTcFrJFXjzVt" /XML "C:\Users\Admin\AppData\Local\Temp\tmp704F.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:3084
- C:\Users\Admin\AppData\Local\Temp\Payment Slip.exe
  "C:\Users\Admin\AppData\Local\Temp\Payment Slip.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:3684

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalService -s WinHttpAutoProxySvc
1⤵
- Drops file in Windows directory
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:852