agenttesla | dbce014e0bebb6c4adb1499470ca495638f0bca6f6634b5da4ddba55eadaef06

General

Target
Purchase Order.exe
Size 544KB
Sample201109-km1a4wffhs
SHA256 dbce014e0bebb6c4adb1499470ca495638f0bca6f6634b5da4ddba55eadaef06
MD5 a49d94ac107f10733e65ba9e5ef9e5fc
SHA1 f2f6e29012a665d4e31009184535c435f56df097
SHA512 07da9d3466fab99e14cab536fb9833f2d95149388d7de3107429f26e87a7e727090de51cad218dd882cf20d47da7208e1854f0b88a656bb824525b1b6881ebd8
MD5 SHA1 SHA512

Score

10^/10

agenttesla coreentity evasion keylogger rezer0 spyware stealer trojan

Malware Config

Extracted

Credentials

Protocol
smtp
Host
mail.acmasindia.com
Port
587
Username
[email protected]
Password
7R?_e#f.wLob

Extracted

Family

agenttesla

Credentials

Protocol
smtp
Host
mail.acmasindia.com
Port
587
Username
[email protected]
Password
7R?_e#f.wLob

Signatures

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

CoreEntity .NET Packer 1 IoCs

A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.

coreentity

resource	yara_rule
behavioral2/memory/4684-7-0x0000000005B20000-0x0000000005B22000-memory.dmp	coreentity

AgentTesla Payload 2 IoCs

resource	yara_rule
behavioral2/memory/3188-11-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral2/memory/3188-12-0x000000000044C61E-mapping.dmp	family_agenttesla

rezer0 1 IoCs

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

rezer0

resource	yara_rule
behavioral2/memory/4684-8-0x0000000007B00000-0x0000000007B53000-memory.dmp	rezer0

Disables Task Manager via registry modification
evasion

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4684 set thread context of 3188	4684	Purchase Order.exe	78

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
2272	schtasks.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
1164	REG.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
4684	Purchase Order.exe
4684	Purchase Order.exe
4684	Purchase Order.exe
3188	Purchase Order.exe
3188	Purchase Order.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4684	Purchase Order.exe
Token: SeDebugPrivilege	3188	Purchase Order.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 4684 wrote to memory of 2272	4684	Purchase Order.exe	75
PID 4684 wrote to memory of 2272	4684	Purchase Order.exe	75
PID 4684 wrote to memory of 2272	4684	Purchase Order.exe	75
PID 4684 wrote to memory of 3848	4684	Purchase Order.exe	77
PID 4684 wrote to memory of 3848	4684	Purchase Order.exe	77
PID 4684 wrote to memory of 3848	4684	Purchase Order.exe	77
PID 4684 wrote to memory of 3188	4684	Purchase Order.exe	78
PID 4684 wrote to memory of 3188	4684	Purchase Order.exe	78
PID 4684 wrote to memory of 3188	4684	Purchase Order.exe	78
PID 4684 wrote to memory of 3188	4684	Purchase Order.exe	78
PID 4684 wrote to memory of 3188	4684	Purchase Order.exe	78
PID 4684 wrote to memory of 3188	4684	Purchase Order.exe	78
PID 4684 wrote to memory of 3188	4684	Purchase Order.exe	78
PID 4684 wrote to memory of 3188	4684	Purchase Order.exe	78
PID 3188 wrote to memory of 1164	3188	Purchase Order.exe	81
PID 3188 wrote to memory of 1164	3188	Purchase Order.exe	81
PID 3188 wrote to memory of 1164	3188	Purchase Order.exe	81
PID 3188 wrote to memory of 1832	3188	Purchase Order.exe	84
PID 3188 wrote to memory of 1832	3188	Purchase Order.exe	84
PID 3188 wrote to memory of 1832	3188	Purchase Order.exe	84

C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe
"C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4684
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\izubZbilc" /XML "C:\Users\Admin\AppData\Local\Temp\tmp79F8.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:2272
- C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe
  "{path}"
  2⤵
  PID:3848
- C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe
  "{path}"
  2⤵
  - Drops file in Drivers directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3188
- - C:\Windows\SysWOW64\REG.exe
    REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
    3⤵
    - Modifies registry key
    PID:1164
- - C:\Windows\SysWOW64\netsh.exe
    "netsh" wlan show profile
    3⤵
    PID:1832

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

3

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/3188-13-0x0000000073430000-0x0000000073B1E000-memory.dmp

Download

memory/3188-11-0x0000000000400000-0x0000000000452000-memory.dmp

Download

memory/3188-18-0x0000000005650000-0x0000000005651000-memory.dmp

Download

memory/3188-19-0x00000000062C0000-0x00000000062C1000-memory.dmp

Download

memory/4684-6-0x0000000007960000-0x0000000007961000-memory.dmp

Download

memory/4684-7-0x0000000005B20000-0x0000000005B22000-memory.dmp

Download

memory/4684-8-0x0000000007B00000-0x0000000007B53000-memory.dmp

Download

memory/4684-5-0x0000000005600000-0x0000000005601000-memory.dmp

Download

memory/4684-4-0x0000000005560000-0x0000000005561000-memory.dmp

Download

memory/4684-0-0x0000000073430000-0x0000000073B1E000-memory.dmp

Download

memory/4684-3-0x0000000005B30000-0x0000000005B31000-memory.dmp

Download

memory/4684-1-0x0000000000CB0000-0x0000000000CB1000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads