agenttesla | a7c404c180deb431bd646e805be187aa4d65c1c2eb6d38c9c288af96d21d2eb8

General

Target
YhhVZ4JTSCw0YiE.exe
Size 925KB
Sample200907-2e9xtg4vxn
SHA256 a7c404c180deb431bd646e805be187aa4d65c1c2eb6d38c9c288af96d21d2eb8
MD5 0c0ef79bf9908fadb24e3e101ca415c0
SHA1 0849a0f6585b38db7dabdd1b09fa4447d4771566
SHA512 fdcf2672f0567766e4a6e480e776fb00f510b94ef47f27b959108a80fb76e92a3311a4a5f4ed14af28e81ec188f2a99d7f9dd48faf1727e0572c8525685e98b8
MD5 SHA1 SHA512

Score

10^/10

Family

Credentials

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/1512-8-0x0000000000400000-0x0000000000466000-memory.dmp	family_agenttesla
behavioral1/memory/1512-9-0x000000000046146E-mapping.dmp	family_agenttesla
behavioral1/memory/1512-10-0x0000000000400000-0x0000000000466000-memory.dmp	family_agenttesla
behavioral1/memory/1512-11-0x0000000000400000-0x0000000000466000-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

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	YhhVZ4JTSCw0YiE.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	YhhVZ4JTSCw0YiE.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

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

Query Registry

Peripheral Device Discovery

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	YhhVZ4JTSCw0YiE.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	YhhVZ4JTSCw0YiE.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 240 set thread context of 1512	240	YhhVZ4JTSCw0YiE.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.

Scheduled Task

pid	Process
2028	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	240	YhhVZ4JTSCw0YiE.exe
Token: SeDebugPrivilege	1512	RegSvcs.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 240 wrote to memory of 2028	240	YhhVZ4JTSCw0YiE.exe	29
PID 240 wrote to memory of 2028	240	YhhVZ4JTSCw0YiE.exe	29
PID 240 wrote to memory of 2028	240	YhhVZ4JTSCw0YiE.exe	29
PID 240 wrote to memory of 2028	240	YhhVZ4JTSCw0YiE.exe	29
PID 240 wrote to memory of 1512	240	YhhVZ4JTSCw0YiE.exe	31
PID 240 wrote to memory of 1512	240	YhhVZ4JTSCw0YiE.exe	31
PID 240 wrote to memory of 1512	240	YhhVZ4JTSCw0YiE.exe	31
PID 240 wrote to memory of 1512	240	YhhVZ4JTSCw0YiE.exe	31
PID 240 wrote to memory of 1512	240	YhhVZ4JTSCw0YiE.exe	31
PID 240 wrote to memory of 1512	240	YhhVZ4JTSCw0YiE.exe	31
PID 240 wrote to memory of 1512	240	YhhVZ4JTSCw0YiE.exe	31
PID 240 wrote to memory of 1512	240	YhhVZ4JTSCw0YiE.exe	31
PID 240 wrote to memory of 1512	240	YhhVZ4JTSCw0YiE.exe	31
PID 240 wrote to memory of 1512	240	YhhVZ4JTSCw0YiE.exe	31
PID 240 wrote to memory of 1512	240	YhhVZ4JTSCw0YiE.exe	31
PID 240 wrote to memory of 1512	240	YhhVZ4JTSCw0YiE.exe	31

C:\Users\Admin\AppData\Local\Temp\YhhVZ4JTSCw0YiE.exe
"C:\Users\Admin\AppData\Local\Temp\YhhVZ4JTSCw0YiE.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:240
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\SvVlEwAzYkSSGh" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB99F.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:2028
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "{path}"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1512