agenttesla | b2d092923decbb77dea424a3d430b58b1fd2b94a57f616a64a4ca7de1f721d27

General

Target

fb36897fa9e0f60691b011aa1d48bce4.exe
Size

522KB
MD5

fb36897fa9e0f60691b011aa1d48bce4
SHA1

41b88df0292611747097d824a9a75015397add79
SHA256

b2d092923decbb77dea424a3d430b58b1fd2b94a57f616a64a4ca7de1f721d27
SHA512

f42b6e2398e300734003f1e72a0c346358b2b5d4c72be3229e82d3e727edbfcbc1c3e66ab9a90b4665f7b9a4263cc5d04ce4c1da269040a336df54e01fd84642

Score

10^/10

agenttesla coreentity keylogger rezer0 spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.prudential.com.np
Port:
587
Username:
damauli@prudential.com.np
Password:
ensure@prudential

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/372-4-0x00000000005B0000-0x00000000005B3000-memory.dmp	coreentity

AgentTesla Payload 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1292-9-0x000000000044BCDE-mapping.dmp	family_agenttesla
behavioral1/memory/1292-8-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral1/memory/1292-10-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral1/memory/1292-11-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla

rezer0 1 IoCs

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

rezer0

Processes:

resource	yara_rule
behavioral1/memory/372-5-0x0000000004820000-0x0000000004872000-memory.dmp	rezer0

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

Processes:

fb36897fa9e0f60691b011aa1d48bce4.exe

description pid process target process

PID 372 set thread context of 1292 372 fb36897fa9e0f60691b011aa1d48bce4.exe fb36897fa9e0f60691b011aa1d48bce4.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

1892 schtasks.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

fb36897fa9e0f60691b011aa1d48bce4.exe

pid process

1292 fb36897fa9e0f60691b011aa1d48bce4.exe
1292 fb36897fa9e0f60691b011aa1d48bce4.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

fb36897fa9e0f60691b011aa1d48bce4.exefb36897fa9e0f60691b011aa1d48bce4.exe

description pid process

Token: SeDebugPrivilege 372 fb36897fa9e0f60691b011aa1d48bce4.exe
Token: SeDebugPrivilege 1292 fb36897fa9e0f60691b011aa1d48bce4.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

fb36897fa9e0f60691b011aa1d48bce4.exe

pid process

372 fb36897fa9e0f60691b011aa1d48bce4.exe
372 fb36897fa9e0f60691b011aa1d48bce4.exe

description	pid	process	target process
PID 372 set thread context of 1292	372	fb36897fa9e0f60691b011aa1d48bce4.exe	fb36897fa9e0f60691b011aa1d48bce4.exe

pid	process
1892	schtasks.exe

pid	process
1292	fb36897fa9e0f60691b011aa1d48bce4.exe
1292	fb36897fa9e0f60691b011aa1d48bce4.exe

description	pid	process
Token: SeDebugPrivilege	372	fb36897fa9e0f60691b011aa1d48bce4.exe
Token: SeDebugPrivilege	1292	fb36897fa9e0f60691b011aa1d48bce4.exe

pid	process
372	fb36897fa9e0f60691b011aa1d48bce4.exe
372	fb36897fa9e0f60691b011aa1d48bce4.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

fb36897fa9e0f60691b011aa1d48bce4.exe

description	pid	process	target process
PID 372 wrote to memory of 1892	372	fb36897fa9e0f60691b011aa1d48bce4.exe	schtasks.exe
PID 372 wrote to memory of 1892	372	fb36897fa9e0f60691b011aa1d48bce4.exe	schtasks.exe
PID 372 wrote to memory of 1892	372	fb36897fa9e0f60691b011aa1d48bce4.exe	schtasks.exe
PID 372 wrote to memory of 1892	372	fb36897fa9e0f60691b011aa1d48bce4.exe	schtasks.exe
PID 372 wrote to memory of 1292	372	fb36897fa9e0f60691b011aa1d48bce4.exe	fb36897fa9e0f60691b011aa1d48bce4.exe
PID 372 wrote to memory of 1292	372	fb36897fa9e0f60691b011aa1d48bce4.exe	fb36897fa9e0f60691b011aa1d48bce4.exe
PID 372 wrote to memory of 1292	372	fb36897fa9e0f60691b011aa1d48bce4.exe	fb36897fa9e0f60691b011aa1d48bce4.exe
PID 372 wrote to memory of 1292	372	fb36897fa9e0f60691b011aa1d48bce4.exe	fb36897fa9e0f60691b011aa1d48bce4.exe
PID 372 wrote to memory of 1292	372	fb36897fa9e0f60691b011aa1d48bce4.exe	fb36897fa9e0f60691b011aa1d48bce4.exe
PID 372 wrote to memory of 1292	372	fb36897fa9e0f60691b011aa1d48bce4.exe	fb36897fa9e0f60691b011aa1d48bce4.exe
PID 372 wrote to memory of 1292	372	fb36897fa9e0f60691b011aa1d48bce4.exe	fb36897fa9e0f60691b011aa1d48bce4.exe
PID 372 wrote to memory of 1292	372	fb36897fa9e0f60691b011aa1d48bce4.exe	fb36897fa9e0f60691b011aa1d48bce4.exe
PID 372 wrote to memory of 1292	372	fb36897fa9e0f60691b011aa1d48bce4.exe	fb36897fa9e0f60691b011aa1d48bce4.exe

C:\Users\Admin\AppData\Local\Temp\fb36897fa9e0f60691b011aa1d48bce4.exe
"C:\Users\Admin\AppData\Local\Temp\fb36897fa9e0f60691b011aa1d48bce4.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:372

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\yDmRCoLfg" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2FF6.tmp"
2⤵
- Creates scheduled task(s)
PID:1892

C:\Users\Admin\AppData\Local\Temp\fb36897fa9e0f60691b011aa1d48bce4.exe
"{path}"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1292

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

Credential Access

Credentials in Files

2

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp2FF6.tmp
MD5
4e655edb8e28a8840dd9ccb69ac3a2af

SHA1
25cd9f6ca153b7f71ac1746808cbe06f112b0762

SHA256
14364d79970001018e36b23be790a690f188ffb17608f11cc1ec63d3f24d51d9

SHA512
2ae8fc5df1fcae905626846acde5ae272185ef7d550769daa5da38f933e97ceeb256c2624137011dd394186ebd4edbd50ae6918ee9e00b9296a28d11b60142ef

Download Submit
memory/372-0-0x0000000074090000-0x000000007477E000-memory.dmp

Filesize
6.9MB

Download
memory/372-1-0x0000000001220000-0x0000000001221000-memory.dmp

Filesize
4KB

Download
memory/372-4-0x00000000005B0000-0x00000000005B3000-memory.dmp

Filesize
12KB

Download
memory/372-5-0x0000000004820000-0x0000000004872000-memory.dmp

Filesize
328KB

Download
memory/1292-9-0x000000000044BCDE-mapping.dmp

Download
memory/1292-8-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1292-10-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1292-11-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1292-12-0x0000000074090000-0x000000007477E000-memory.dmp

Filesize
6.9MB

Download
memory/1892-6-0x0000000000000000-mapping.dmp

Download
memory/2044-3-0x000007FEF6350000-0x000007FEF65CA000-memory.dmp

Filesize
2.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads