limerat | 7f7821072d79a0deb26affbf11a4e73d86bfae4a3ef05f9ae6d41757b06a3617

Analysis

max time kernel
126s
max time network
161s
platform
windows11-21h2_x64
resource
win11-20240802-en
resource tags

arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
submitted
13-08-2024 21:06

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General

Target

MailRanger/MailUpdate.exe
Size

69KB
MD5

02192b904bdd1c545a82d8baad0ded6e
SHA1

d56dc9551b0a852cd94531ffeccdaba2328170e8
SHA256

d6568d47cb39b9220273fc4c1c7dda6403203f4952b81fe9790d19050e07114d
SHA512

00ede17e9a2c9eea4083f62f39dd1e736598418a9ecc3f35d14443682390a18ed76e9626925cf52640f536bdfae6dc656eddb8c22a7ee8e20f86f3550265d3ce
SSDEEP

1536:ZpgFwaqSZHFVGW+AasLQxFm5gUWd+0LDyjofAWZgzR:nIwadZHFoaQzm9FIDyjoY5V

Score

10^/10

limerat discovery rat

Malware Config

Extracted

Family

limerat

Wallets

bc1qyej3qhu680rqc5akxac39r92g6a8g6r4708gyj

Attributes

aes_key
Test
antivm
true
c2_url
https://pastebin.com/raw/FU8V31pM
delay
3
download_payload
false
install
true
install_name
system32s.exe
main_folder
AppData
pin_spread
true
sub_folder
\
usb_spread
true

Signatures

LimeRAT
Simple yet powerful RAT for Windows machines written in .NET.
rat limerat
Executes dropped EXE 1 IoCs

Processes:

system32s.exe

pid process

1712 system32s.exe
Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service
T1102

Processes:

flow ioc

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

System Information Discovery
T1082

pid	process
1712	system32s.exe

flow	ioc
1	pastebin.com
2	pastebin.com

System Location Discovery: System Language Discovery 1 TTPs 3 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

Processes:

MailUpdate.exeschtasks.exesystem32s.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MailUpdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	system32s.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence execution

Scheduled Task
T1053.005

Processes:

schtasks.exe

pid process

3604 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

system32s.exe

description pid process

Token: SeDebugPrivilege 1712 system32s.exe
Token: SeDebugPrivilege 1712 system32s.exe

pid	process
3604	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	1712	system32s.exe
Token: SeDebugPrivilege	1712	system32s.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

MailUpdate.exe

description	pid	process	target process
PID 1952 wrote to memory of 3604	1952	MailUpdate.exe	schtasks.exe
PID 1952 wrote to memory of 3604	1952	MailUpdate.exe	schtasks.exe
PID 1952 wrote to memory of 3604	1952	MailUpdate.exe	schtasks.exe
PID 1952 wrote to memory of 1712	1952	MailUpdate.exe	system32s.exe
PID 1952 wrote to memory of 1712	1952	MailUpdate.exe	system32s.exe
PID 1952 wrote to memory of 1712	1952	MailUpdate.exe	system32s.exe

C:\Users\Admin\AppData\Local\Temp\MailRanger\MailUpdate.exe
"C:\Users\Admin\AppData\Local\Temp\MailRanger\MailUpdate.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1952
- C:\Windows\SysWOW64\schtasks.exe
  schtasks /create /f /sc ONLOGON /RL HIGHEST /tn LimeRAT-Admin /tr "'C:\Users\Admin\AppData\Roaming\system32s.exe'"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:3604
- C:\Users\Admin\AppData\Roaming\system32s.exe
  "C:\Users\Admin\AppData\Roaming\system32s.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:1712

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\system32s.exe

Filesize
69KB

MD5
02192b904bdd1c545a82d8baad0ded6e

SHA1
d56dc9551b0a852cd94531ffeccdaba2328170e8

SHA256
d6568d47cb39b9220273fc4c1c7dda6403203f4952b81fe9790d19050e07114d

SHA512
00ede17e9a2c9eea4083f62f39dd1e736598418a9ecc3f35d14443682390a18ed76e9626925cf52640f536bdfae6dc656eddb8c22a7ee8e20f86f3550265d3ce

Download Submit
memory/1712-17-0x0000000074820000-0x0000000074FD1000-memory.dmp

Filesize
7.7MB

Download
memory/1712-15-0x0000000074820000-0x0000000074FD1000-memory.dmp

Filesize
7.7MB

Download
memory/1712-18-0x0000000006210000-0x00000000062A2000-memory.dmp

Filesize
584KB

Download
memory/1712-19-0x0000000074820000-0x0000000074FD1000-memory.dmp

Filesize
7.7MB

Download
memory/1712-20-0x0000000074820000-0x0000000074FD1000-memory.dmp

Filesize
7.7MB

Download
memory/1952-2-0x00000000057E0000-0x000000000587C000-memory.dmp

Filesize
624KB

Download
memory/1952-3-0x0000000005880000-0x00000000058E6000-memory.dmp

Filesize
408KB

Download
memory/1952-4-0x0000000074820000-0x0000000074FD1000-memory.dmp

Filesize
7.7MB

Download
memory/1952-5-0x00000000065E0000-0x0000000006B86000-memory.dmp

Filesize
5.6MB

Download
memory/1952-1-0x0000000000D80000-0x0000000000D98000-memory.dmp

Filesize
96KB

Download
memory/1952-16-0x0000000074820000-0x0000000074FD1000-memory.dmp

Filesize
7.7MB

Download
memory/1952-0-0x000000007482E000-0x000000007482F000-memory.dmp

Filesize
4KB

Download