agenttesla | 28f8d9684a26ccf1f127b2296b2d3a89df746fafe3ee181aa643b00b536caea7

General

Target

BstkDDU.dll
Size

451KB
MD5

5ea0e72799f7ab9d3f426f77e02499f5
SHA1

03f91e09564f19f99953d82924d3437df3de5b8d
SHA256

f7a3464b99eff79164de42b98a8d3bc3944c758386d5e446541030e205501049
SHA512

e0ca46a585e434fdc6ba735afe94f73dbb3ff4b8b97b32801f8d20739e869c4f41e5287dd9fc90a0cb3f8d1a25e004cd0335a7b43cdae53959d79f92e0e3b836
SSDEEP

12288:7RejOcRw0FRIOK9pcwWvni+Jr/cUkc8OIgWi9klTX:FcOcRwgRIDp6Z/cUkE9klTX

Score

10^/10

agenttesla discovery keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: ftp
Host:
ftp://ftp.transotraval.cl
Port:
21
Username:
[email protected]
Password:
vIZ2P]dt&a!d

Signatures

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

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
5	ip-api.com
6	ip-api.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2268 set thread context of 1116	2268	rundll32.exe	31
PID 2268 set thread context of 2552	2268	rundll32.exe	33

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	installutil.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AddInProcess32.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1116	AddInProcess32.exe
2552	installutil.exe
1116	AddInProcess32.exe
2552	installutil.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2552	installutil.exe
Token: SeDebugPrivilege	1116	AddInProcess32.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2268 wrote to memory of 1116	2268	rundll32.exe	31
PID 2268 wrote to memory of 1116	2268	rundll32.exe	31
PID 2268 wrote to memory of 1116	2268	rundll32.exe	31
PID 2268 wrote to memory of 1116	2268	rundll32.exe	31
PID 2268 wrote to memory of 1116	2268	rundll32.exe	31
PID 2268 wrote to memory of 1116	2268	rundll32.exe	31
PID 2268 wrote to memory of 1116	2268	rundll32.exe	31
PID 2268 wrote to memory of 1116	2268	rundll32.exe	31
PID 2268 wrote to memory of 1116	2268	rundll32.exe	31
PID 2268 wrote to memory of 2532	2268	rundll32.exe	32
PID 2268 wrote to memory of 2532	2268	rundll32.exe	32
PID 2268 wrote to memory of 2532	2268	rundll32.exe	32
PID 2268 wrote to memory of 2532	2268	rundll32.exe	32
PID 2268 wrote to memory of 2552	2268	rundll32.exe	33
PID 2268 wrote to memory of 2552	2268	rundll32.exe	33
PID 2268 wrote to memory of 2552	2268	rundll32.exe	33
PID 2268 wrote to memory of 2552	2268	rundll32.exe	33
PID 2268 wrote to memory of 2552	2268	rundll32.exe	33
PID 2268 wrote to memory of 2552	2268	rundll32.exe	33
PID 2268 wrote to memory of 2552	2268	rundll32.exe	33
PID 2268 wrote to memory of 2552	2268	rundll32.exe	33
PID 2268 wrote to memory of 2552	2268	rundll32.exe	33
PID 2268 wrote to memory of 2552	2268	rundll32.exe	33
PID 2268 wrote to memory of 2552	2268	rundll32.exe	33
PID 2268 wrote to memory of 2552	2268	rundll32.exe	33

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\BstkDDU.dll,#1
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2268
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1116
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
  2⤵
  PID:2532
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2552

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1116-0-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1116-4-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1116-2-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1116-10-0x000000007408E000-0x000000007408F000-memory.dmp

Filesize
4KB

Download
memory/1116-13-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/1116-14-0x000000007408E000-0x000000007408F000-memory.dmp

Filesize
4KB

Download
memory/1116-16-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2552-11-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2552-12-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2552-15-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download

Analysis

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