agenttesla | d7143a0fe03e7294be0319e92f0a78bcbe8a0e97a4a2437e5227304e0fe37d29

Analysis

max time kernel
124s
max time network
104s
platform
windows10_x64
resource
win10v20201028
submitted
09/11/2020, 20:52

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General

Target
ommercial invoice copy.pdf.exe
Size 393KB
Sample201109-ghgpmmppns
SHA256 d7143a0fe03e7294be0319e92f0a78bcbe8a0e97a4a2437e5227304e0fe37d29
MD5 2b0ed2ca02e34e9ad541c2997b543500
SHA1 ddc9f876b8d660cc3011a1785b14b219e5cb37d8
SHA512 ad8e4a774baf544b9bfe1d6bfba6187d38d01ee4a4ad5f7ecd5f16dcc5ab6f59e3d1ff9623bb9290c6c1a674d2dca7327f065b5a95edfbb96e31e7cedeb3f386
MD5 SHA1 SHA512

Score

10^/10

agenttesla evasion keylogger persistence rezer0 spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol
smtp
Host
mail.aquariuslogistics.com
Port
587
Username
[email protected]
Password
AQL@2019#$

Signatures

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

AgentTesla Payload 14 IoCs

resource	yara_rule
behavioral2/memory/3996-12-0x0000000000400000-0x000000000044E000-memory.dmp	family_agenttesla
behavioral2/memory/3996-13-0x000000000044833E-mapping.dmp	family_agenttesla
behavioral2/memory/3996-23-0x000000000044833E-mapping.dmp	family_agenttesla
behavioral2/memory/3996-25-0x000000000044833E-mapping.dmp	family_agenttesla
behavioral2/memory/3996-24-0x000000000044833E-mapping.dmp	family_agenttesla
behavioral2/memory/3996-22-0x000000000044833E-mapping.dmp	family_agenttesla
behavioral2/memory/3996-26-0x000000000044833E-mapping.dmp	family_agenttesla
behavioral2/memory/3996-27-0x000000000044833E-mapping.dmp	family_agenttesla
behavioral2/memory/3996-30-0x000000000044833E-mapping.dmp	family_agenttesla
behavioral2/memory/3996-29-0x000000000044833E-mapping.dmp	family_agenttesla
behavioral2/memory/3996-28-0x000000000044833E-mapping.dmp	family_agenttesla
behavioral2/memory/3996-31-0x000000000044833E-mapping.dmp	family_agenttesla
behavioral2/memory/3996-33-0x000000000044833E-mapping.dmp	family_agenttesla
behavioral2/memory/3996-32-0x000000000044833E-mapping.dmp	family_agenttesla

Looks for VirtualBox Guest Additions in registry 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

rezer0 1 IoCs

Detects ReZer0, a packer with multiple versions used in various campaigns.

rezer0

resource	yara_rule
behavioral2/memory/1028-8-0x0000000008700000-0x000000000874E000-memory.dmp	rezer0

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	ommercial invoice copy.pdf.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	ommercial invoice copy.pdf.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\CpSnJ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\CpSnJ\\CpSnJ.exe"	RegSvcs.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	ommercial invoice copy.pdf.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum\0	ommercial invoice copy.pdf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1028 set thread context of 3996	1028	ommercial invoice copy.pdf.exe	83

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
892	3996	WerFault.exe	83

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
1112	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
1028	ommercial invoice copy.pdf.exe
1028	ommercial invoice copy.pdf.exe
1028	ommercial invoice copy.pdf.exe
3996	RegSvcs.exe
3996	RegSvcs.exe
892	WerFault.exe
892	WerFault.exe
892	WerFault.exe
892	WerFault.exe
892	WerFault.exe
892	WerFault.exe
892	WerFault.exe
892	WerFault.exe
892	WerFault.exe
892	WerFault.exe
892	WerFault.exe
892	WerFault.exe
892	WerFault.exe
892	WerFault.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1028	ommercial invoice copy.pdf.exe
Token: SeDebugPrivilege	3996	RegSvcs.exe
Token: SeRestorePrivilege	892	WerFault.exe
Token: SeBackupPrivilege	892	WerFault.exe
Token: SeDebugPrivilege	892	WerFault.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1028 wrote to memory of 1112	1028	ommercial invoice copy.pdf.exe	80
PID 1028 wrote to memory of 1112	1028	ommercial invoice copy.pdf.exe	80
PID 1028 wrote to memory of 1112	1028	ommercial invoice copy.pdf.exe	80
PID 1028 wrote to memory of 3924	1028	ommercial invoice copy.pdf.exe	82
PID 1028 wrote to memory of 3924	1028	ommercial invoice copy.pdf.exe	82
PID 1028 wrote to memory of 3924	1028	ommercial invoice copy.pdf.exe	82
PID 1028 wrote to memory of 3996	1028	ommercial invoice copy.pdf.exe	83
PID 1028 wrote to memory of 3996	1028	ommercial invoice copy.pdf.exe	83
PID 1028 wrote to memory of 3996	1028	ommercial invoice copy.pdf.exe	83
PID 1028 wrote to memory of 3996	1028	ommercial invoice copy.pdf.exe	83
PID 1028 wrote to memory of 3996	1028	ommercial invoice copy.pdf.exe	83
PID 1028 wrote to memory of 3996	1028	ommercial invoice copy.pdf.exe	83
PID 1028 wrote to memory of 3996	1028	ommercial invoice copy.pdf.exe	83
PID 1028 wrote to memory of 3996	1028	ommercial invoice copy.pdf.exe	83

C:\Users\Admin\AppData\Local\Temp\ommercial invoice copy.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\ommercial invoice copy.pdf.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:1028
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\OWTRLlC" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2B56.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1112
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "{path}"
  2⤵
  PID:3924
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "{path}"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3996
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3996 -s 1500
    3⤵
    - Program crash
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:892

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

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

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Downloads

memory/892-21-0x00000000044A0000-0x00000000044A1000-memory.dmp

Download

memory/892-34-0x0000000004BD0000-0x0000000004BD1000-memory.dmp

Download

memory/1028-7-0x0000000007050000-0x0000000007051000-memory.dmp

Download

memory/1028-5-0x0000000004EF0000-0x0000000004EF1000-memory.dmp

Download

memory/1028-6-0x0000000005070000-0x0000000005072000-memory.dmp

Download

memory/1028-0-0x0000000073290000-0x000000007397E000-memory.dmp

Download

memory/1028-8-0x0000000008700000-0x000000000874E000-memory.dmp

Download

memory/1028-9-0x0000000008670000-0x0000000008671000-memory.dmp

Download

memory/1028-4-0x0000000004F80000-0x0000000004F81000-memory.dmp

Download

memory/1028-3-0x00000000055B0000-0x00000000055B1000-memory.dmp

Download

memory/1028-1-0x0000000000650000-0x0000000000651000-memory.dmp

Download

memory/3996-19-0x0000000005570000-0x0000000005571000-memory.dmp

Download

memory/3996-14-0x0000000073290000-0x000000007397E000-memory.dmp

Download

memory/3996-12-0x0000000000400000-0x000000000044E000-memory.dmp

Download