agenttesla | 461a9c4bf2d2b7d32a5b31ee339daa9fdaeaf703fe19f5dba5267f5c95cbd9b3

Analysis

max time kernel
150s
max time network
125s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
04-06-2024 01:48

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General

Target

93530c4c096769f27688048f640a4eea_JaffaCakes118.exe
Size

638KB
MD5

93530c4c096769f27688048f640a4eea
SHA1

4b024d9bedd8746afe060dc5d0c083f0ebe412de
SHA256

461a9c4bf2d2b7d32a5b31ee339daa9fdaeaf703fe19f5dba5267f5c95cbd9b3
SHA512

ebb1d9ed38345138f0483425dbcec9cb4c74f99211a6af09479f2cd939aacf6a8b8f3d40e257e54bf393d059f4779d92282a82e4750b43713c8c47f5be10bac4
SSDEEP

12288:P8yIy581Qv8yIy581QrpiFowjWodmfvIjL2cw0NHFn:fn8m/n8mNGowjWimHIjL283

Score

10^/10

agenttesla agilenet collection keylogger persistence spyware stealer trojan

Malware Config

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
Executes dropped EXE 1 IoCs

Processes:

RUb.exe

pid process

2580 RUb.exe
Loads dropped DLL 1 IoCs

Processes:

RegAsm.exe

pid process

2848 RegAsm.exe

pid	process
2580	RUb.exe

Obfuscated with Agile.Net obfuscator 1 IoCs

Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

agilenet

Processes:

resource	yara_rule
behavioral1/memory/2784-2-0x0000000000440000-0x0000000000468000-memory.dmp	agile_net

Reads WinSCP keys stored on the system 2 TTPs
Tries to access WinSCP stored sessions.
spyware stealer

Data from Local System
T1005

Credentials in Registry
T1552.002
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
T1552.001
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
T1552.001
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
T1552.001

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

RegAsm.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

RegAsm.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows\CurrentVersion\Run\MyOtApp = "C:\\Users\\Admin\\AppData\\Roaming\\MyOtApp\\MyOtApp.exe"	RegAsm.exe

Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

4 checkip.dyndns.org
Suspicious use of SetThreadContext 1 IoCs

Processes:

93530c4c096769f27688048f640a4eea_JaffaCakes118.exe

description pid process target process

PID 2784 set thread context of 2848 2784 93530c4c096769f27688048f640a4eea_JaffaCakes118.exe RegAsm.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

flow	ioc
4	checkip.dyndns.org

description	pid	process	target process
PID 2784 set thread context of 2848	2784	93530c4c096769f27688048f640a4eea_JaffaCakes118.exe	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

RegAsm.exeRUb.exe

pid	process
2848	RegAsm.exe
2848	RegAsm.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe
2580	RUb.exe
2848	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

93530c4c096769f27688048f640a4eea_JaffaCakes118.exeRegAsm.exeRUb.exe

description	pid	process
Token: SeDebugPrivilege	2784	93530c4c096769f27688048f640a4eea_JaffaCakes118.exe
Token: SeDebugPrivilege	2848	RegAsm.exe
Token: SeDebugPrivilege	2580	RUb.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

RegAsm.exe

pid process

2848 RegAsm.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

93530c4c096769f27688048f640a4eea_JaffaCakes118.exeRegAsm.exe

description	pid	process	target process
PID 2784 wrote to memory of 2848	2784	93530c4c096769f27688048f640a4eea_JaffaCakes118.exe	RegAsm.exe
PID 2784 wrote to memory of 2848	2784	93530c4c096769f27688048f640a4eea_JaffaCakes118.exe	RegAsm.exe
PID 2784 wrote to memory of 2848	2784	93530c4c096769f27688048f640a4eea_JaffaCakes118.exe	RegAsm.exe
PID 2784 wrote to memory of 2848	2784	93530c4c096769f27688048f640a4eea_JaffaCakes118.exe	RegAsm.exe
PID 2784 wrote to memory of 2848	2784	93530c4c096769f27688048f640a4eea_JaffaCakes118.exe	RegAsm.exe
PID 2784 wrote to memory of 2848	2784	93530c4c096769f27688048f640a4eea_JaffaCakes118.exe	RegAsm.exe
PID 2784 wrote to memory of 2848	2784	93530c4c096769f27688048f640a4eea_JaffaCakes118.exe	RegAsm.exe
PID 2784 wrote to memory of 2848	2784	93530c4c096769f27688048f640a4eea_JaffaCakes118.exe	RegAsm.exe
PID 2784 wrote to memory of 2848	2784	93530c4c096769f27688048f640a4eea_JaffaCakes118.exe	RegAsm.exe
PID 2784 wrote to memory of 2848	2784	93530c4c096769f27688048f640a4eea_JaffaCakes118.exe	RegAsm.exe
PID 2784 wrote to memory of 2848	2784	93530c4c096769f27688048f640a4eea_JaffaCakes118.exe	RegAsm.exe
PID 2784 wrote to memory of 2848	2784	93530c4c096769f27688048f640a4eea_JaffaCakes118.exe	RegAsm.exe
PID 2848 wrote to memory of 2580	2848	RegAsm.exe	RUb.exe
PID 2848 wrote to memory of 2580	2848	RegAsm.exe	RUb.exe
PID 2848 wrote to memory of 2580	2848	RegAsm.exe	RUb.exe
PID 2848 wrote to memory of 2580	2848	RegAsm.exe	RUb.exe

outlook_office_path 1 IoCs

Processes:

RegAsm.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

outlook_win_path 1 IoCs

Processes:

RegAsm.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\93530c4c096769f27688048f640a4eea_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\93530c4c096769f27688048f640a4eea_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2784

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
2⤵
- Loads dropped DLL
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
PID:2848

C:\Users\Admin\AppData\Local\Temp\RUb.exe
"C:\Users\Admin\AppData\Local\Temp\RUb.exe" C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2580

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Credentials in Registry

T1552.002

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\RUb.exe
Filesize
10KB

MD5
f683769b947501b5a98376619d5938bb

SHA1
6a38e4acd9ade0d85697d10683ec84fa0daed11c

SHA256
c2cae82e01d954e3a50feaebcd3f75de7416a851ea855d6f0e8aaac84a507ca3

SHA512
dbd7a26139c5ef6a409fb247b08eb54c62328edace9a047aac3ca75b8e552572428dbda4efc7836398fa4d2d9e68075e10e2436efcf1f9fc138d69ac440bd556

Download Submit
memory/2784-0-0x0000000074DCE000-0x0000000074DCF000-memory.dmp

Filesize
4KB

Download
memory/2784-1-0x0000000000E10000-0x0000000000EB6000-memory.dmp

Filesize
664KB

Download
memory/2784-2-0x0000000000440000-0x0000000000468000-memory.dmp

Filesize
160KB

Download
memory/2784-3-0x0000000074DC0000-0x00000000754AE000-memory.dmp

Filesize
6.9MB

Download
memory/2784-4-0x0000000074DC0000-0x00000000754AE000-memory.dmp

Filesize
6.9MB

Download
memory/2784-18-0x0000000074DC0000-0x00000000754AE000-memory.dmp

Filesize
6.9MB

Download
memory/2848-9-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/2848-7-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/2848-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2848-13-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/2848-17-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/2848-15-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/2848-6-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/2848-21-0x00000000005C0000-0x00000000005CA000-memory.dmp

Filesize
40KB

Download
memory/2848-5-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download