agenttesla | ddb4d7efe5f833597322678e85ccb43206f757624e55fa7dcadab6d398f8afea

Analysis

max time kernel
122s
max time network
111s
platform
windows10_x64
resource
win10
submitted
02/10/2020, 09:27

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General

Target
Purchase Order.exe
Size 654KB
Sample201002-p79923rgde
SHA256 ddb4d7efe5f833597322678e85ccb43206f757624e55fa7dcadab6d398f8afea
MD5 f575c056887b83a921d8f618a9f7e0b4
SHA1 e8a5444eec1b2eb4c9a634f378412ebe3b08d7c8
SHA512 54ad109e27c1ed9ecebd623bafd4df8c92bd92d98e52152d7ca9da2beadbf5303d6bedf72872982c90ff2b36aaa3b82c384b59c9cfd4b11f703d56377333a476
MD5 SHA1 SHA512

Score

10^/10

keylogger stealer spyware trojan agenttesla evasion

Malware Config

Extracted

Credentials

Protocol
smtp
Host
smtp.shirdilog.com
Port
587
Username
[email protected]
Password
SL094521

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
Modifies Windows Defender Real-time Protection settings 3 TTPs
evasion trojan

Modify Registry
T1112

Modify Existing Service
T1031

Disabling Security Tools
T1089

AgentTesla Payload 2 IoCs

keylogger stealer

resource	yara_rule
behavioral2/memory/3936-40-0x0000000000400000-0x0000000000466000-memory.dmp	agent_tesla
behavioral2/memory/3936-41-0x00000000004612BE-mapping.dmp	agent_tesla

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	Purchase Order.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Purchase Order.exe

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware

Data from Local System
T1005

Credentials in Files
T1081

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features	Purchase Order.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	Purchase Order.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 value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum\0	Purchase Order.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	Purchase Order.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3832 set thread context of 3936	3832	Purchase Order.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
3312	schtasks.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
1796	REG.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2624	powershell.exe
2624	powershell.exe
2624	powershell.exe
3832	Purchase Order.exe
3832	Purchase Order.exe
3832	Purchase Order.exe
3832	Purchase Order.exe
3832	Purchase Order.exe
3936	Purchase Order.exe
3936	Purchase Order.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2624	powershell.exe
Token: SeDebugPrivilege	3832	Purchase Order.exe
Token: SeDebugPrivilege	3936	Purchase Order.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3936	Purchase Order.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3832 wrote to memory of 2624	3832	Purchase Order.exe	76
PID 3832 wrote to memory of 2624	3832	Purchase Order.exe	76
PID 3832 wrote to memory of 2624	3832	Purchase Order.exe	76
PID 3832 wrote to memory of 3312	3832	Purchase Order.exe	79
PID 3832 wrote to memory of 3312	3832	Purchase Order.exe	79
PID 3832 wrote to memory of 3312	3832	Purchase Order.exe	79
PID 3832 wrote to memory of 3904	3832	Purchase Order.exe	81
PID 3832 wrote to memory of 3904	3832	Purchase Order.exe	81
PID 3832 wrote to memory of 3904	3832	Purchase Order.exe	81
PID 3832 wrote to memory of 3908	3832	Purchase Order.exe	82
PID 3832 wrote to memory of 3908	3832	Purchase Order.exe	82
PID 3832 wrote to memory of 3908	3832	Purchase Order.exe	82
PID 3832 wrote to memory of 3936	3832	Purchase Order.exe	83
PID 3832 wrote to memory of 3936	3832	Purchase Order.exe	83
PID 3832 wrote to memory of 3936	3832	Purchase Order.exe	83
PID 3832 wrote to memory of 3936	3832	Purchase Order.exe	83
PID 3832 wrote to memory of 3936	3832	Purchase Order.exe	83
PID 3832 wrote to memory of 3936	3832	Purchase Order.exe	83
PID 3832 wrote to memory of 3936	3832	Purchase Order.exe	83
PID 3832 wrote to memory of 3936	3832	Purchase Order.exe	83
PID 3936 wrote to memory of 1796	3936	Purchase Order.exe	84
PID 3936 wrote to memory of 1796	3936	Purchase Order.exe	84
PID 3936 wrote to memory of 1796	3936	Purchase Order.exe	84

C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe
"C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe"
1⤵
- Checks BIOS information in registry
- Windows security modification
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3832
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2624
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\dFdpqYK" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1A9D.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:3312
- C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe
  "C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe"
  2⤵
  PID:3904
- C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe
  "C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe"
  2⤵
  PID:3908
- C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe
  "C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3936
- - C:\Windows\SysWOW64\REG.exe
    REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer / v NoRun / t REG_DWORD / d 1 / f
    3⤵
    - Modifies registry key
    PID:1796

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Modify Existing Service

T1031

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Disabling Security Tools

T1089

Modify Registry

T1112

Virtualization/Sandbox Evasion

T1497

Credential Access

Credentials in Files

T1081

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/2624-32-0x0000000009330000-0x0000000009331000-memory.dmp

Download

memory/2624-20-0x0000000007FD0000-0x0000000007FD1000-memory.dmp

Download

memory/2624-35-0x00000000092D0000-0x00000000092D1000-memory.dmp

Download

memory/2624-33-0x00000000092E0000-0x00000000092E1000-memory.dmp

Download

memory/2624-31-0x0000000009180000-0x0000000009181000-memory.dmp

Download

memory/2624-30-0x0000000009010000-0x0000000009011000-memory.dmp

Download

memory/2624-23-0x0000000009050000-0x0000000009083000-memory.dmp

Download

memory/2624-21-0x00000000080B0000-0x00000000080B1000-memory.dmp

Download

memory/2624-19-0x00000000078B0000-0x00000000078B1000-memory.dmp

Download

memory/2624-12-0x0000000073D70000-0x000000007445E000-memory.dmp

Download

memory/2624-13-0x00000000010D0000-0x00000000010D1000-memory.dmp

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memory/2624-14-0x0000000007280000-0x0000000007281000-memory.dmp

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memory/2624-15-0x0000000007250000-0x0000000007251000-memory.dmp

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memory/2624-16-0x0000000007030000-0x0000000007031000-memory.dmp

Download

memory/2624-18-0x0000000007990000-0x0000000007991000-memory.dmp

Download

memory/2624-17-0x0000000007920000-0x0000000007921000-memory.dmp

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memory/3832-8-0x0000000004E90000-0x0000000004E94000-memory.dmp

Download

memory/3832-6-0x0000000004E70000-0x0000000004E71000-memory.dmp

Download

memory/3832-0-0x0000000073D70000-0x000000007445E000-memory.dmp

Download

memory/3832-7-0x00000000051D0000-0x00000000051D1000-memory.dmp

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memory/3832-4-0x00000000054E0000-0x00000000054E1000-memory.dmp

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memory/3832-10-0x0000000005C60000-0x0000000005CC5000-memory.dmp

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memory/3832-5-0x0000000004FE0000-0x0000000004FE1000-memory.dmp

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memory/3832-9-0x0000000005F70000-0x0000000005FF1000-memory.dmp

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memory/3832-3-0x0000000004EE0000-0x0000000004EE1000-memory.dmp

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memory/3832-1-0x00000000005C0000-0x00000000005C1000-memory.dmp

Download

memory/3936-42-0x0000000073D70000-0x000000007445E000-memory.dmp

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memory/3936-47-0x0000000005B00000-0x0000000005B01000-memory.dmp

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memory/3936-40-0x0000000000400000-0x0000000000466000-memory.dmp

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