agenttesla | 14a8dc48a92695ede4638dbfd725d594da0a0483862311e0249b3c88a69b8b81

General

Target

Documents.exe
Size

568KB
MD5

4c4ff89eb2f8ee2fa067a1d017497021
SHA1

8d8c62a01d0c3fc189040472ec42aa5171c1c1e4
SHA256

726e05271ef6a6781ecd7bd9b130e4621734c991160d820f0fdd61186f5fbd55
SHA512

1d2b6dcace4cba63a4cfab4c197286f132ca05b53b2c39c3b3ee60349514b4a2fac61b6e3cbaa61d784b6c7a6d8edb9e48338320c6c3ee8c75a7b225d67a0d2b

Score

10^/10

agenttesla collection keylogger rezer0 spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
smtp.mosaiclayouts.com
Port:
587
Username:
sales@mosaiclayouts.com
Password:
UY$W4+]^+9;)7CF5

Signatures

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

AgentTesla Payload 6 IoCs

Processes:

resource	yara_rule
behavioral3/memory/1772-64-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral3/memory/1772-65-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral3/memory/1772-67-0x000000000044797E-mapping.dmp	family_agenttesla
behavioral3/memory/1772-66-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral3/memory/1772-69-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral3/memory/1772-71-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla

ReZer0 packer 1 IoCs

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

rezer0

Processes:

resource	yara_rule
behavioral3/memory/888-58-0x00000000061B0000-0x0000000006204000-memory.dmp	rezer0

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

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 stealer

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 stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

Documents.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Documents.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Documents.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Documents.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

Documents.exe

description pid process target process

PID 888 set thread context of 1772 888 Documents.exe Documents.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

1064 schtasks.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

Documents.exeDocuments.exe

pid process

888 Documents.exe
888 Documents.exe
1772 Documents.exe
1772 Documents.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Documents.exeDocuments.exe

description pid process

Token: SeDebugPrivilege 888 Documents.exe
Token: SeDebugPrivilege 1772 Documents.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Documents.exe

pid process

1772 Documents.exe

description	pid	process	target process
PID 888 set thread context of 1772	888	Documents.exe	Documents.exe

pid	process
1064	schtasks.exe

pid	process
888	Documents.exe
888	Documents.exe
1772	Documents.exe
1772	Documents.exe

description	pid	process
Token: SeDebugPrivilege	888	Documents.exe
Token: SeDebugPrivilege	1772	Documents.exe

pid	process
1772	Documents.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

Documents.exe

description	pid	process	target process
PID 888 wrote to memory of 1064	888	Documents.exe	schtasks.exe
PID 888 wrote to memory of 1064	888	Documents.exe	schtasks.exe
PID 888 wrote to memory of 1064	888	Documents.exe	schtasks.exe
PID 888 wrote to memory of 1064	888	Documents.exe	schtasks.exe
PID 888 wrote to memory of 1772	888	Documents.exe	Documents.exe
PID 888 wrote to memory of 1772	888	Documents.exe	Documents.exe
PID 888 wrote to memory of 1772	888	Documents.exe	Documents.exe
PID 888 wrote to memory of 1772	888	Documents.exe	Documents.exe
PID 888 wrote to memory of 1772	888	Documents.exe	Documents.exe
PID 888 wrote to memory of 1772	888	Documents.exe	Documents.exe
PID 888 wrote to memory of 1772	888	Documents.exe	Documents.exe
PID 888 wrote to memory of 1772	888	Documents.exe	Documents.exe
PID 888 wrote to memory of 1772	888	Documents.exe	Documents.exe

outlook_office_path 1 IoCs

Processes:

Documents.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Documents.exe

outlook_win_path 1 IoCs

Processes:

Documents.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Documents.exe

C:\Users\Admin\AppData\Local\Temp\Documents.exe
"C:\Users\Admin\AppData\Local\Temp\Documents.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:888

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\tRiFxUPIY" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE293.tmp"
2⤵
- Creates scheduled task(s)
PID:1064

C:\Users\Admin\AppData\Local\Temp\Documents.exe
"{path}"
2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
PID:1772

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

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpE293.tmp
Filesize
1KB

MD5
ed4bf834843d140bc2891a04fed0c4f2

SHA1
9dd5c7c8ed9cbdeda1df723e839a8fa4c16b307d

SHA256
5fd12d50831b31ecb5fe3c472ef1db4fb74e3070760ea989c27459ac9d3d4576

SHA512
616315270e6cdf948fa328a454eff581209b808d324da61c98ac7cec693657f65f4a82ebb70a239d081a895deec1bacac9cc214a40c98fca962acf68d8c01f83

Download Submit
memory/888-57-0x00000000004D0000-0x00000000004D8000-memory.dmp

Filesize
32KB

Download
memory/888-56-0x00000000755C1000-0x00000000755C3000-memory.dmp

Filesize
8KB

Download
memory/888-54-0x0000000001080000-0x0000000001114000-memory.dmp

Filesize
592KB

Download
memory/888-58-0x00000000061B0000-0x0000000006204000-memory.dmp

Filesize
336KB

Download
memory/888-55-0x00000000009E0000-0x0000000000A38000-memory.dmp

Filesize
352KB

Download
memory/1064-59-0x0000000000000000-mapping.dmp

Download
memory/1772-62-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/1772-61-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/1772-64-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/1772-65-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/1772-67-0x000000000044797E-mapping.dmp

Download
memory/1772-66-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/1772-69-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/1772-71-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads