agenttesla | d5a6ab788954e96a9c2be8f4d466e9a4b5fb7d871849d28260e03cd05e9e9ccb

General

Target
bill.txt.exe
Size 665KB
Sample200828-bsd1fssfj2
SHA256 d5a6ab788954e96a9c2be8f4d466e9a4b5fb7d871849d28260e03cd05e9e9ccb
MD5 17eb6da6003aef6d5b1d0d7268e945b1
SHA1 71bf602fb4c3899c7a9d7b7b8e4406b032fa3453
SHA512 07ce8f49083f459c6fb5359f0452ed35780dd3b8eac419201bff0a111ad11adf655fb37bae9904a0a340a67178fd31aaf73a20d8078bafa510cd6e9f1e209998
MD5 SHA1 SHA512

Score

10^/10

agenttesla evasion keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol
smtp
Host
mail.privateemail.com
Port
587
Username
[email protected]
Password
GODOFSURELOGS123

Signatures

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

AgentTesla Payload 4 IoCs

resource	yara_rule
behavioral1/memory/976-8-0x0000000000400000-0x0000000000466000-memory.dmp	family_agenttesla
behavioral1/memory/976-9-0x0000000000460C1E-mapping.dmp	family_agenttesla
behavioral1/memory/976-10-0x0000000000400000-0x0000000000466000-memory.dmp	family_agenttesla
behavioral1/memory/976-11-0x0000000000400000-0x0000000000466000-memory.dmp	family_agenttesla

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\VideoBiosVersion	bill.txt.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	bill.txt.exe

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	bill.txt.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	bill.txt.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 608 set thread context of 976	608	bill.txt.exe	31

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
1216	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
608	bill.txt.exe
608	bill.txt.exe
608	bill.txt.exe
976	RegSvcs.exe
976	RegSvcs.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	608	bill.txt.exe
Token: SeDebugPrivilege	976	RegSvcs.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
976	RegSvcs.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 608 wrote to memory of 1216	608	bill.txt.exe	29
PID 608 wrote to memory of 1216	608	bill.txt.exe	29
PID 608 wrote to memory of 1216	608	bill.txt.exe	29
PID 608 wrote to memory of 1216	608	bill.txt.exe	29
PID 608 wrote to memory of 976	608	bill.txt.exe	31
PID 608 wrote to memory of 976	608	bill.txt.exe	31
PID 608 wrote to memory of 976	608	bill.txt.exe	31
PID 608 wrote to memory of 976	608	bill.txt.exe	31
PID 608 wrote to memory of 976	608	bill.txt.exe	31
PID 608 wrote to memory of 976	608	bill.txt.exe	31
PID 608 wrote to memory of 976	608	bill.txt.exe	31
PID 608 wrote to memory of 976	608	bill.txt.exe	31
PID 608 wrote to memory of 976	608	bill.txt.exe	31
PID 608 wrote to memory of 976	608	bill.txt.exe	31
PID 608 wrote to memory of 976	608	bill.txt.exe	31
PID 608 wrote to memory of 976	608	bill.txt.exe	31

C:\Users\Admin\AppData\Local\Temp\bill.txt.exe
"C:\Users\Admin\AppData\Local\Temp\bill.txt.exe"
1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:608
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\xPLkzR" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2694.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1216
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "{path}"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:976