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
behavioral2/memory/3988-7-0x0000000004EE0000-0x0000000004EE3000-memory.dmp	coreentity

AgentTesla Payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2064-13-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral2/memory/2064-14-0x000000000044B01E-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

Processes:

resource	yara_rule
behavioral2/memory/3988-8-0x0000000008100000-0x0000000008151000-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\SystemBiosVersion	DHL_INVOICE.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	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 3988 set thread context of 2064 3988 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

3476 schtasks.exe
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

DHL_INVOICE.exeDHL_INVOICE.exe

pid process

3988 DHL_INVOICE.exe
3988 DHL_INVOICE.exe
3988 DHL_INVOICE.exe
3988 DHL_INVOICE.exe
2064 DHL_INVOICE.exe
2064 DHL_INVOICE.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

DHL_INVOICE.exeDHL_INVOICE.exe

description pid process

Token: SeDebugPrivilege 3988 DHL_INVOICE.exe
Token: SeDebugPrivilege 2064 DHL_INVOICE.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

DHL_INVOICE.exe

pid process

2064 DHL_INVOICE.exe

description	pid	process	target process
PID 3988 set thread context of 2064	3988	DHL_INVOICE.exe	DHL_INVOICE.exe

pid	process
3476	schtasks.exe

pid	process
3988	DHL_INVOICE.exe
3988	DHL_INVOICE.exe
3988	DHL_INVOICE.exe
3988	DHL_INVOICE.exe
2064	DHL_INVOICE.exe
2064	DHL_INVOICE.exe

description	pid	process
Token: SeDebugPrivilege	3988	DHL_INVOICE.exe
Token: SeDebugPrivilege	2064	DHL_INVOICE.exe

pid	process
2064	DHL_INVOICE.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

DHL_INVOICE.exeDHL_INVOICE.exe

description	pid	process	target process
PID 3988 wrote to memory of 3476	3988	DHL_INVOICE.exe	schtasks.exe
PID 3988 wrote to memory of 3476	3988	DHL_INVOICE.exe	schtasks.exe
PID 3988 wrote to memory of 3476	3988	DHL_INVOICE.exe	schtasks.exe
PID 3988 wrote to memory of 2064	3988	DHL_INVOICE.exe	DHL_INVOICE.exe
PID 3988 wrote to memory of 2064	3988	DHL_INVOICE.exe	DHL_INVOICE.exe
PID 3988 wrote to memory of 2064	3988	DHL_INVOICE.exe	DHL_INVOICE.exe
PID 3988 wrote to memory of 2064	3988	DHL_INVOICE.exe	DHL_INVOICE.exe
PID 3988 wrote to memory of 2064	3988	DHL_INVOICE.exe	DHL_INVOICE.exe
PID 3988 wrote to memory of 2064	3988	DHL_INVOICE.exe	DHL_INVOICE.exe
PID 3988 wrote to memory of 2064	3988	DHL_INVOICE.exe	DHL_INVOICE.exe
PID 3988 wrote to memory of 2064	3988	DHL_INVOICE.exe	DHL_INVOICE.exe
PID 2064 wrote to memory of 3144	2064	DHL_INVOICE.exe	netsh.exe
PID 2064 wrote to memory of 3144	2064	DHL_INVOICE.exe	netsh.exe
PID 2064 wrote to memory of 3144	2064	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:3988

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\BmiApP" /XML "C:\Users\Admin\AppData\Local\Temp\tmp40B8.tmp"
2⤵
- Creates scheduled task(s)
PID:3476

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:2064

C:\Windows\SysWOW64\netsh.exe
"netsh" wlan show profile
3⤵
PID:3144

Network

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\Microsoft\CLR_v4.0_32\UsageLogs\DHL_INVOICE.exe.log
MD5
ca0f5a97e99b64cce46421d178db03d0

SHA1
dc14bbb3304f311a8970fd16d7fd45b11fa9075f

SHA256
335bca3539bd41893cecddf8d4f5a6bf10b276687267e46fc1801a73e1170866

SHA512
db07fd19802353811e1c0da40233e8fe10abdbb7904beb69fe44106fe2822d98b571f5cf6e8c3a8e61dcca1b10048c5e102de478da47301b4f75fe6dcf434900

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp40B8.tmp
MD5
e3ce8a8abae8422a63f38cab9127628a

SHA1
3a60b463262f85a2db6585c25c76d24867218b63

SHA256
b546ca52634bbdb56297c193d6288788aac583d2d8f949c8c06778d43e2080a8

SHA512
5758e2317d71b22e17275e07d0595fca4236c15d81ea68f837d7ad4defa0f868c46edb1c1573884c4a22b2c5cc1028b2029a43fdd320e4f43dc61347c10b7c23

Download Submit
memory/2064-21-0x0000000005960000-0x0000000005961000-memory.dmp

Filesize
4KB

Download
memory/2064-16-0x00000000738E0000-0x0000000073FCE000-memory.dmp

Filesize
6.9MB

Download
memory/2064-14-0x000000000044B01E-mapping.dmp

Download
memory/2064-13-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/3144-23-0x0000000000000000-mapping.dmp

Download
memory/3476-11-0x0000000000000000-mapping.dmp

Download
memory/3988-5-0x0000000007E90000-0x0000000007E91000-memory.dmp

Filesize
4KB

Download
memory/3988-10-0x00000000098E0000-0x00000000098E1000-memory.dmp

Filesize
4KB

Download
memory/3988-9-0x000000000A370000-0x000000000A371000-memory.dmp

Filesize
4KB

Download
memory/3988-8-0x0000000008100000-0x0000000008151000-memory.dmp

Filesize
324KB

Download
memory/3988-7-0x0000000004EE0000-0x0000000004EE3000-memory.dmp

Filesize
12KB

Download
memory/3988-6-0x0000000007E60000-0x0000000007E61000-memory.dmp

Filesize
4KB

Download
memory/3988-0-0x00000000738E0000-0x0000000073FCE000-memory.dmp

Filesize
6.9MB

Download
memory/3988-4-0x0000000008170000-0x0000000008171000-memory.dmp

Filesize
4KB

Download
memory/3988-3-0x0000000005510000-0x0000000005568000-memory.dmp

Filesize
352KB

Download
memory/3988-1-0x0000000000BE0000-0x0000000000BE1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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