agenttesla | 88502fda993fde73909371ca6813191b0af2d571632c1ebd5c92bd3a844af1c9

General

Target

Doc.exe
Size

478KB
MD5

bf08620d6295f47bdde72569b43677ca
SHA1

2afe1a20b5cd9255ac5429aaf7b7df3849f9c578
SHA256

88502fda993fde73909371ca6813191b0af2d571632c1ebd5c92bd3a844af1c9
SHA512

8b56773ffc23603b18f9c549291a6fa3010f17d33fdad55039eeb81b393cd8d9b8251ccc1e4148e54f879980bc1ef80ee75bcbf99abc7af7c4034827cc6fbb6e

Score

10^/10

agenttesla keylogger rezer0 spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.kalatecnic.com
Port:
587
Username:
comercial@kalatecnic.com
Password:
Barcelona08397

Signatures

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

AgentTesla Payload 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1956-7-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/1956-8-0x000000000044CDCE-mapping.dmp	family_agenttesla
behavioral1/memory/1956-9-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/1956-10-0x0000000000400000-0x0000000000452000-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/1068-4-0x0000000000FB0000-0x0000000001003000-memory.dmp	rezer0

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

Processes:

Doc.exe

description pid process target process

PID 1068 set thread context of 1956 1068 Doc.exe Doc.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

1080 schtasks.exe
Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

Doc.exeDoc.exe

pid process

1068 Doc.exe
1068 Doc.exe
1068 Doc.exe
1956 Doc.exe
1956 Doc.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Doc.exeDoc.exe

description pid process

Token: SeDebugPrivilege 1068 Doc.exe
Token: SeDebugPrivilege 1956 Doc.exe

description	pid	process	target process
PID 1068 set thread context of 1956	1068	Doc.exe	Doc.exe

pid	process
1080	schtasks.exe

pid	process
1068	Doc.exe
1068	Doc.exe
1068	Doc.exe
1956	Doc.exe
1956	Doc.exe

description	pid	process
Token: SeDebugPrivilege	1068	Doc.exe
Token: SeDebugPrivilege	1956	Doc.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

Doc.exeDoc.exe

description	pid	process	target process
PID 1068 wrote to memory of 1080	1068	Doc.exe	schtasks.exe
PID 1068 wrote to memory of 1080	1068	Doc.exe	schtasks.exe
PID 1068 wrote to memory of 1080	1068	Doc.exe	schtasks.exe
PID 1068 wrote to memory of 1080	1068	Doc.exe	schtasks.exe
PID 1068 wrote to memory of 368	1068	Doc.exe	Doc.exe
PID 1068 wrote to memory of 368	1068	Doc.exe	Doc.exe
PID 1068 wrote to memory of 368	1068	Doc.exe	Doc.exe
PID 1068 wrote to memory of 368	1068	Doc.exe	Doc.exe
PID 1068 wrote to memory of 1956	1068	Doc.exe	Doc.exe
PID 1068 wrote to memory of 1956	1068	Doc.exe	Doc.exe
PID 1068 wrote to memory of 1956	1068	Doc.exe	Doc.exe
PID 1068 wrote to memory of 1956	1068	Doc.exe	Doc.exe
PID 1068 wrote to memory of 1956	1068	Doc.exe	Doc.exe
PID 1068 wrote to memory of 1956	1068	Doc.exe	Doc.exe
PID 1068 wrote to memory of 1956	1068	Doc.exe	Doc.exe
PID 1068 wrote to memory of 1956	1068	Doc.exe	Doc.exe
PID 1068 wrote to memory of 1956	1068	Doc.exe	Doc.exe
PID 1956 wrote to memory of 900	1956	Doc.exe	netsh.exe
PID 1956 wrote to memory of 900	1956	Doc.exe	netsh.exe
PID 1956 wrote to memory of 900	1956	Doc.exe	netsh.exe
PID 1956 wrote to memory of 900	1956	Doc.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\Doc.exe
"C:\Users\Admin\AppData\Local\Temp\Doc.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1068

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\chjgYQTVsGlXd" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1120.tmp"
2⤵
- Creates scheduled task(s)
PID:1080

C:\Users\Admin\AppData\Local\Temp\Doc.exe
"{path}"
2⤵
PID:368

C:\Users\Admin\AppData\Local\Temp\Doc.exe
"{path}"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1956

C:\Windows\SysWOW64\netsh.exe
"netsh" wlan show profile
3⤵
PID:900

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

3

T1081

Discovery

System Information Discovery

1

T1082

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\tmp1120.tmp
MD5
ab9094860354de47b165f444659c8f96

SHA1
533f845b99be29efb71c96110d9bbcc09a3a63ce

SHA256
deeb0fd0a2420553560dca55a34513e53e74475d00dff2c4d912ef10831f1dda

SHA512
1e0d104d910ccac128336e8a2b0c508146017fc25340d9bd6a1b02b13aa5b517869eb3bd7b8ed8737a3bf60a88b3648d37294950c2e56842af604cc8e7f64dba

Download Submit
memory/900-14-0x0000000000000000-mapping.dmp

Download
memory/1068-0-0x00000000741A0000-0x000000007488E000-memory.dmp

Filesize
6.9MB

Download
memory/1068-1-0x0000000001260000-0x0000000001261000-memory.dmp

Filesize
4KB

Download
memory/1068-3-0x00000000002B0000-0x00000000002BF000-memory.dmp

Filesize
60KB

Download
memory/1068-4-0x0000000000FB0000-0x0000000001003000-memory.dmp

Filesize
332KB

Download
memory/1080-5-0x0000000000000000-mapping.dmp

Download
memory/1956-7-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1956-8-0x000000000044CDCE-mapping.dmp

Download
memory/1956-9-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1956-10-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1956-11-0x00000000741A0000-0x000000007488E000-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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