agenttesla | 5d71a063c0b7bdc86b16aaaf0048953f12472ad1383082432274273b485040e1

General

Target

DHL_INVOICE.exe
Size

486KB
MD5

6bf0c02f8f9746e45d6584f0f52c3eeb
SHA1

e568f73b84fb6660f62e769b6240a48a5c2a0b79
SHA256

5d71a063c0b7bdc86b16aaaf0048953f12472ad1383082432274273b485040e1
SHA512

123c294c2a6d61629beffda3cd017a2be73481786731cbc6b6ad0dc5000dc39b933fcb3d190e275923e3e214533c4b1967018fdff8352d44595d6104857375c5

Score

10^/10

agenttesla coreentity evasion keylogger rezer0 spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.cosmosgroup.in
Port:
587
Username:
santosh@cosmosgroup.in
Password:
santosh_cosmos

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

Processes:

resource	yara_rule
behavioral1/memory/1848-4-0x00000000002C0000-0x00000000002C3000-memory.dmp	coreentity

AgentTesla Payload 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/944-8-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral1/memory/944-9-0x000000000044B01E-mapping.dmp	family_agenttesla
behavioral1/memory/944-10-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral1/memory/944-11-0x0000000000400000-0x0000000000450000-memory.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

Processes:

resource	yara_rule
behavioral1/memory/1848-5-0x0000000007580000-0x00000000075D1000-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

Processes:

DHL_INVOICE.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	DHL_INVOICE.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	DHL_INVOICE.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

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

Processes:

DHL_INVOICE.exe

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

Suspicious use of SetThreadContext 1 IoCs

Processes:

DHL_INVOICE.exe

description pid process target process

PID 1848 set thread context of 944 1848 DHL_INVOICE.exe DHL_INVOICE.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

Processes:

schtasks.exe

pid process

368 schtasks.exe
Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

DHL_INVOICE.exeDHL_INVOICE.exe

pid process

1848 DHL_INVOICE.exe
1848 DHL_INVOICE.exe
1848 DHL_INVOICE.exe
944 DHL_INVOICE.exe
944 DHL_INVOICE.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

DHL_INVOICE.exeDHL_INVOICE.exe

description pid process

Token: SeDebugPrivilege 1848 DHL_INVOICE.exe
Token: SeDebugPrivilege 944 DHL_INVOICE.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

DHL_INVOICE.exe

pid process

944 DHL_INVOICE.exe

description	pid	process	target process
PID 1848 set thread context of 944	1848	DHL_INVOICE.exe	DHL_INVOICE.exe

pid	process
368	schtasks.exe

pid	process
1848	DHL_INVOICE.exe
1848	DHL_INVOICE.exe
1848	DHL_INVOICE.exe
944	DHL_INVOICE.exe
944	DHL_INVOICE.exe

description	pid	process
Token: SeDebugPrivilege	1848	DHL_INVOICE.exe
Token: SeDebugPrivilege	944	DHL_INVOICE.exe

pid	process
944	DHL_INVOICE.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

DHL_INVOICE.exeDHL_INVOICE.exe

description	pid	process	target process
PID 1848 wrote to memory of 368	1848	DHL_INVOICE.exe	schtasks.exe
PID 1848 wrote to memory of 368	1848	DHL_INVOICE.exe	schtasks.exe
PID 1848 wrote to memory of 368	1848	DHL_INVOICE.exe	schtasks.exe
PID 1848 wrote to memory of 368	1848	DHL_INVOICE.exe	schtasks.exe
PID 1848 wrote to memory of 944	1848	DHL_INVOICE.exe	DHL_INVOICE.exe
PID 1848 wrote to memory of 944	1848	DHL_INVOICE.exe	DHL_INVOICE.exe
PID 1848 wrote to memory of 944	1848	DHL_INVOICE.exe	DHL_INVOICE.exe
PID 1848 wrote to memory of 944	1848	DHL_INVOICE.exe	DHL_INVOICE.exe
PID 1848 wrote to memory of 944	1848	DHL_INVOICE.exe	DHL_INVOICE.exe
PID 1848 wrote to memory of 944	1848	DHL_INVOICE.exe	DHL_INVOICE.exe
PID 1848 wrote to memory of 944	1848	DHL_INVOICE.exe	DHL_INVOICE.exe
PID 1848 wrote to memory of 944	1848	DHL_INVOICE.exe	DHL_INVOICE.exe
PID 1848 wrote to memory of 944	1848	DHL_INVOICE.exe	DHL_INVOICE.exe
PID 944 wrote to memory of 1088	944	DHL_INVOICE.exe	netsh.exe
PID 944 wrote to memory of 1088	944	DHL_INVOICE.exe	netsh.exe
PID 944 wrote to memory of 1088	944	DHL_INVOICE.exe	netsh.exe
PID 944 wrote to memory of 1088	944	DHL_INVOICE.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\DHL_INVOICE.exe
"C:\Users\Admin\AppData\Local\Temp\DHL_INVOICE.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:1848

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\BmiApP" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4B52.tmp"
2⤵
- Creates scheduled task(s)
PID:368

C:\Users\Admin\AppData\Local\Temp\DHL_INVOICE.exe
"{path}"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:944

C:\Windows\SysWOW64\netsh.exe
"netsh" wlan show profile
3⤵
PID:1088

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Credentials in Files

3

T1081

Discovery

Query Registry

4

T1012

Virtualization/Sandbox Evasion

2

T1497

System Information Discovery

3

T1082

Peripheral Device Discovery

1

T1120

Lateral Movement

Collection

Data from Local System

3

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp4B52.tmp
MD5
146c74611526bcf41e46a7051ca9c6c8

SHA1
45206a891ee88d80354bfd14dcbfb62d433757d8

SHA256
66fd933b9b1666802ece12417fd8a54d7a5db7c99b2fd20bb6dbd18a510d76fd

SHA512
cb57a75359cd42d90cd0bd2c77498e51d67c36db9eda884830838a76562a0456fe6ece8009aae7353a14bcdb7569ab8b511e084b01cbc3c1c8707a70a8705d5c

Download Submit
memory/368-6-0x0000000000000000-mapping.dmp

Download
memory/944-10-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/944-8-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/944-9-0x000000000044B01E-mapping.dmp

Download
memory/944-11-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/944-12-0x00000000742C0000-0x00000000749AE000-memory.dmp

Filesize
6.9MB

Download
memory/1088-15-0x0000000000000000-mapping.dmp

Download
memory/1848-4-0x00000000002C0000-0x00000000002C3000-memory.dmp

Filesize
12KB

Download
memory/1848-5-0x0000000007580000-0x00000000075D1000-memory.dmp

Filesize
324KB

Download
memory/1848-3-0x0000000000760000-0x00000000007B8000-memory.dmp

Filesize
352KB

Download
memory/1848-1-0x0000000000360000-0x0000000000361000-memory.dmp

Filesize
4KB

Download
memory/1848-0-0x00000000742C0000-0x00000000749AE000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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