agenttesla | 0d4d3af44ed0aa3154be8537fa238439090826f9f5cc264b967e60699f0e9d4a

General

Target
yyg.exe
Size 775KB
Sample200831-ntx72bvc4j
SHA256 0d4d3af44ed0aa3154be8537fa238439090826f9f5cc264b967e60699f0e9d4a
MD5 cdc6864ab9f7a776ce978d783b0d58ba
SHA1 c0546499734798b7538148b68f34cf39bb24938c
SHA512 0462530986393e9e49062dac6ce2d6bcd6bf8413de9fcfaf3b8ace220e75cb6d9364164810d179d5fd55371493bceae4773a062a7bd4c44bb85fefb44aaab5d2
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
123098322@#

Signatures

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

AgentTesla Payload 2 IoCs

resource	yara_rule
behavioral2/memory/4016-13-0x0000000000400000-0x0000000000466000-memory.dmp	family_agenttesla
behavioral2/memory/4016-14-0x00000000004611DE-mapping.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\SystemBiosVersion	yyg.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	yyg.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	yyg.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum\0	yyg.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2584 set thread context of 4016	2584	yyg.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

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
3908	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 = 2db5c530a17fd601	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 6 IoCs

pid	Process
2584	yyg.exe
2584	yyg.exe
2584	yyg.exe
2584	yyg.exe
4016	RegSvcs.exe
4016	RegSvcs.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeShutdownPrivilege	2332	svchost.exe
Token: SeCreatePagefilePrivilege	2332	svchost.exe
Token: SeDebugPrivilege	2584	yyg.exe
Token: SeDebugPrivilege	4016	RegSvcs.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4016	RegSvcs.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2584 wrote to memory of 3908	2584	yyg.exe	76
PID 2584 wrote to memory of 3908	2584	yyg.exe	76
PID 2584 wrote to memory of 3908	2584	yyg.exe	76
PID 2584 wrote to memory of 4016	2584	yyg.exe	78
PID 2584 wrote to memory of 4016	2584	yyg.exe	78
PID 2584 wrote to memory of 4016	2584	yyg.exe	78
PID 2584 wrote to memory of 4016	2584	yyg.exe	78
PID 2584 wrote to memory of 4016	2584	yyg.exe	78
PID 2584 wrote to memory of 4016	2584	yyg.exe	78
PID 2584 wrote to memory of 4016	2584	yyg.exe	78
PID 2584 wrote to memory of 4016	2584	yyg.exe	78

C:\Users\Admin\AppData\Local\Temp\yyg.exe
"C:\Users\Admin\AppData\Local\Temp\yyg.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:2584
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\baJAXjqya" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF00E.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:3908
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "{path}"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:4016

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:2332