agenttesla | 2c8da0da6cbab2366291deabbb773bec304a9e49c87982a04d6ee33c712cd642

Analysis

max time kernel
105s
max time network
116s
platform
windows10_x64
resource
win10
submitted
28/08/2020, 21:19

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
efott.txt.exe
Size 723KB
Sample200828-4e1ss68evj
SHA256 2c8da0da6cbab2366291deabbb773bec304a9e49c87982a04d6ee33c712cd642
MD5 7b52b5e065c12431e0fabe8c205dc6c5
SHA1 effb71e8fd0c96744b65360450174bc104ab2b67
SHA512 ad89c9581901bf81fd960f68551ab87abf5677c9e612b264d8f13566127f9293a849a1a2662d0b21556ef05fbdade76df2aee604b9e47a6bc4c2073dac88541d
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
@Mexico1.,

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/208-12-0x0000000000400000-0x0000000000466000-memory.dmp	family_agenttesla
behavioral2/memory/208-13-0x0000000000460B6E-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	efott.txt.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	efott.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	efott.txt.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum\0	efott.txt.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3892 set thread context of 208	3892	efott.txt.exe	80

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
2676	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 = e95e9e5c807dd601	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 8 IoCs

pid	Process
3892	efott.txt.exe
3892	efott.txt.exe
3892	efott.txt.exe
3892	efott.txt.exe
3892	efott.txt.exe
3892	efott.txt.exe
208	RegSvcs.exe
208	RegSvcs.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeShutdownPrivilege	1100	svchost.exe
Token: SeCreatePagefilePrivilege	1100	svchost.exe
Token: SeDebugPrivilege	3892	efott.txt.exe
Token: SeDebugPrivilege	208	RegSvcs.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
208	RegSvcs.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3892 wrote to memory of 2676	3892	efott.txt.exe	77
PID 3892 wrote to memory of 2676	3892	efott.txt.exe	77
PID 3892 wrote to memory of 2676	3892	efott.txt.exe	77
PID 3892 wrote to memory of 200	3892	efott.txt.exe	79
PID 3892 wrote to memory of 200	3892	efott.txt.exe	79
PID 3892 wrote to memory of 200	3892	efott.txt.exe	79
PID 3892 wrote to memory of 208	3892	efott.txt.exe	80
PID 3892 wrote to memory of 208	3892	efott.txt.exe	80
PID 3892 wrote to memory of 208	3892	efott.txt.exe	80
PID 3892 wrote to memory of 208	3892	efott.txt.exe	80
PID 3892 wrote to memory of 208	3892	efott.txt.exe	80
PID 3892 wrote to memory of 208	3892	efott.txt.exe	80
PID 3892 wrote to memory of 208	3892	efott.txt.exe	80
PID 3892 wrote to memory of 208	3892	efott.txt.exe	80

C:\Users\Admin\AppData\Local\Temp\efott.txt.exe
"C:\Users\Admin\AppData\Local\Temp\efott.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:3892
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\gffuUAfR" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2ABA.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:2676
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "{path}"
  2⤵
  PID:200
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "{path}"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:208

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:1100

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/208-22-0x0000000006810000-0x0000000006811000-memory.dmp

Download

memory/208-19-0x0000000005570000-0x0000000005571000-memory.dmp

Download

memory/208-17-0x0000000005C60000-0x0000000005C61000-memory.dmp

Download

memory/208-14-0x0000000073D70000-0x000000007445E000-memory.dmp

Download

memory/208-12-0x0000000000400000-0x0000000000466000-memory.dmp

Download

memory/3892-5-0x0000000005900000-0x0000000005901000-memory.dmp

Download

memory/3892-9-0x0000000001230000-0x0000000001231000-memory.dmp

Download

memory/3892-8-0x000000000BE90000-0x000000000BE91000-memory.dmp

Download

memory/3892-7-0x0000000008590000-0x000000000861A000-memory.dmp

Download

memory/3892-6-0x0000000005D10000-0x0000000005DA8000-memory.dmp

Download

memory/3892-0-0x0000000073D70000-0x000000007445E000-memory.dmp

Download

memory/3892-4-0x0000000005290000-0x0000000005291000-memory.dmp

Download

memory/3892-3-0x0000000002B90000-0x0000000002B97000-memory.dmp

Download

memory/3892-1-0x00000000009B0000-0x00000000009B1000-memory.dmp

Download