agenttesla | a0ebed655c76dc37cf93b62042263ae665d39a03a5470a6c6d5cc962541da75d

Analysis

max time kernel
153s
max time network
164s
platform
windows10-2004_x64
resource
win10v2004-en-20220113
submitted
22/02/2022, 11:23

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General

Target
Rnfolthv.exe
Size 108KB
Sample220222-ng5awsgca2
SHA256 a0ebed655c76dc37cf93b62042263ae665d39a03a5470a6c6d5cc962541da75d
MD5 ba01c389c3d9e89614a6e2677277da57
SHA1 54443616751d3c3c3c612587424b48fbb500b97c
SHA512 c676a0ce520e983866e73ea8cdb02eb6ce96463d05789226f0b2cae8f3b053c1a7cbdc953483b0148a58a3700934f4d6e61ff781def7ab06bede6deb9b96b005
MD5 SHA1 SHA512

Score

10^/10

agenttesla keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol
smtp
Host
mail.escueladeseguridadmaritima.com
Port
587
Username
[email protected]
Password
SEsatelite2020
Email to
[email protected]

Signatures

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

AgentTesla Payload 1 IoCs

resource	yara_rule
behavioral2/memory/2884-139-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation	Rnfolthv.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\newapp = "\"C:\\Users\\Admin\\AppData\\Roaming\\newapp.exe\""	Rnfolthv.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1304 set thread context of 2884	1304	Rnfolthv.exe	101

Drops file in Windows directory 6 IoCs

description	ioc	Process
File opened for modification	C:\Windows\WindowsUpdate.log	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\Logs\edb.chk	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\Logs\edb.log	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\DataStore.edb	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\DataStore.jfm	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\ReportingEvents.log	svchost.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4236	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1304	Rnfolthv.exe
1304	Rnfolthv.exe
2884	MSBuild.exe
2884	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	1304	Rnfolthv.exe
Token: SeShutdownPrivilege	2708	svchost.exe
Token: SeCreatePagefilePrivilege	2708	svchost.exe
Token: SeShutdownPrivilege	2708	svchost.exe
Token: SeCreatePagefilePrivilege	2708	svchost.exe
Token: SeShutdownPrivilege	2708	svchost.exe
Token: SeCreatePagefilePrivilege	2708	svchost.exe
Token: SeDebugPrivilege	2884	MSBuild.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1304 wrote to memory of 2700	1304	Rnfolthv.exe	82
PID 1304 wrote to memory of 2700	1304	Rnfolthv.exe	82
PID 1304 wrote to memory of 2700	1304	Rnfolthv.exe	82
PID 2700 wrote to memory of 4236	2700	cmd.exe	84
PID 2700 wrote to memory of 4236	2700	cmd.exe	84
PID 2700 wrote to memory of 4236	2700	cmd.exe	84
PID 1304 wrote to memory of 2884	1304	Rnfolthv.exe	101
PID 1304 wrote to memory of 2884	1304	Rnfolthv.exe	101
PID 1304 wrote to memory of 2884	1304	Rnfolthv.exe	101
PID 1304 wrote to memory of 2884	1304	Rnfolthv.exe	101
PID 1304 wrote to memory of 2884	1304	Rnfolthv.exe	101
PID 1304 wrote to memory of 2884	1304	Rnfolthv.exe	101
PID 1304 wrote to memory of 2884	1304	Rnfolthv.exe	101
PID 1304 wrote to memory of 2884	1304	Rnfolthv.exe	101

C:\Users\Admin\AppData\Local\Temp\Rnfolthv.exe
"C:\Users\Admin\AppData\Local\Temp\Rnfolthv.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1304
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c ping yahoo.com
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2700
- - C:\Windows\SysWOW64\PING.EXE
    ping yahoo.com
    3⤵
    - Runs ping.exe
    PID:4236
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2884

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv
1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:2708

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1304-136-0x000000000C670000-0x000000000C6C0000-memory.dmp

Download

memory/1304-131-0x000000007465E000-0x000000007465F000-memory.dmp

Download

memory/1304-132-0x00000000052C0000-0x00000000052C1000-memory.dmp

Download

memory/1304-130-0x00000000008C0000-0x00000000008E0000-memory.dmp

Download

memory/1304-138-0x0000000000F00000-0x0000000000F92000-memory.dmp

Download

memory/1304-137-0x000000000C780000-0x000000000C832000-memory.dmp

Download

memory/2708-133-0x000002E9EF820000-0x000002E9EF830000-memory.dmp

Download

memory/2708-135-0x000002E9F1F40000-0x000002E9F1F44000-memory.dmp

Download

memory/2708-134-0x000002E9EF880000-0x000002E9EF890000-memory.dmp

Download

memory/2884-139-0x0000000000400000-0x000000000043C000-memory.dmp

Download

memory/2884-140-0x000000007465E000-0x000000007465F000-memory.dmp

Download

memory/2884-141-0x0000000005700000-0x0000000005CA4000-memory.dmp

Download

memory/2884-142-0x0000000002CB0000-0x0000000002CB1000-memory.dmp

Download

memory/2884-143-0x0000000005380000-0x000000000541C000-memory.dmp

Download

memory/2884-144-0x0000000006160000-0x00000000061C6000-memory.dmp

Download