limerat | fc790cea14d04d9090ab085b585a8017ad469ebbce5c9d29c8d877ccf9e3efbf

General

Target

tvsxwrc.exe
Size

28KB
MD5

7374806e51b404de9c639cbff4226eed
SHA1

6c7466e48018fa00ccf53a24615448117697f494
SHA256

5963297e6660586d55779912944414ca8e5ccdf2769419b779e145d5fc597c9f
SHA512

5c29c8c16be3a46cf64997fda0810953fa16c3f53fd8f7979e80a97849e23e36baca1cf84cf84a1404b55cbde8543c3d740c9397da576738a14c64a9962f00f7
SSDEEP

768:bzRbFf8Wp2hBhLXCidmDUjFQuval1IjyJ:fNp8Wp2hBhui8kFfgqjO

Score

10^/10

limerat rat

Malware Config

Extracted

Family

limerat

Wallets

1d15EibWVaZg8KADH1wR5phqhtyhbbdCc

Attributes

aes_key
batata1
antivm
true
c2_url
https://pastebin.com/raw/hqkeiAWx
delay
3
download_payload
false
install
true
install_name
twvrsvc.exe
main_folder
AppData
pin_spread
false
sub_folder
\TeamViewer\
usb_spread
true

Signatures

LimeRAT
Simple yet powerful RAT for Windows machines written in .NET.
rat limerat

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

Processes:

tvsxwrc.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	tvsxwrc.exe

Executes dropped EXE 1 IoCs

Processes:

twvrsvc.exe

pid process

4308 twvrsvc.exe
Legitimate hosting services abused for malware hosting/C2 1 TTPs 8 IoCs

Web Service
T1102

Processes:

flow ioc

9 pastebin.com
11 pastebin.com
12 pastebin.com
13 pastebin.com
14 pastebin.com
15 pastebin.com
16 pastebin.com
4 pastebin.com

pid	process
4308	twvrsvc.exe

flow	ioc
9	pastebin.com
11	pastebin.com
12	pastebin.com
13	pastebin.com
14	pastebin.com
15	pastebin.com
16	pastebin.com
4	pastebin.com

Maps connected drives based on registry 3 TTPs 4 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

tvsxwrc.exetwvrsvc.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	tvsxwrc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	twvrsvc.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	twvrsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	tvsxwrc.exe

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

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exe

pid process

4584 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

twvrsvc.exe

description pid process

Token: SeDebugPrivilege 4308 twvrsvc.exe
Token: SeDebugPrivilege 4308 twvrsvc.exe

pid	process
4584	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	4308	twvrsvc.exe
Token: SeDebugPrivilege	4308	twvrsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

tvsxwrc.exe

description	pid	process	target process
PID 3700 wrote to memory of 4584	3700	tvsxwrc.exe	schtasks.exe
PID 3700 wrote to memory of 4584	3700	tvsxwrc.exe	schtasks.exe
PID 3700 wrote to memory of 4584	3700	tvsxwrc.exe	schtasks.exe
PID 3700 wrote to memory of 4308	3700	tvsxwrc.exe	twvrsvc.exe
PID 3700 wrote to memory of 4308	3700	tvsxwrc.exe	twvrsvc.exe
PID 3700 wrote to memory of 4308	3700	tvsxwrc.exe	twvrsvc.exe

C:\Users\Admin\AppData\Local\Temp\tvsxwrc.exe
"C:\Users\Admin\AppData\Local\Temp\tvsxwrc.exe"
1⤵
- Checks computer location settings
- Maps connected drives based on registry
- Suspicious use of WriteProcessMemory
PID:3700
- C:\Windows\SysWOW64\schtasks.exe
  schtasks /create /f /sc ONLOGON /RL HIGHEST /tn LimeRAT-Admin /tr "'C:\Users\Admin\AppData\Roaming\TeamViewer\twvrsvc.exe'"
  2⤵
  - Creates scheduled task(s)
  PID:4584
- C:\Users\Admin\AppData\Roaming\TeamViewer\twvrsvc.exe
  "C:\Users\Admin\AppData\Roaming\TeamViewer\twvrsvc.exe"
  2⤵
  - Executes dropped EXE
  - Maps connected drives based on registry
  - Suspicious use of AdjustPrivilegeToken
  PID:4308

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\TeamViewer\twvrsvc.exe

Filesize
28KB

MD5
7374806e51b404de9c639cbff4226eed

SHA1
6c7466e48018fa00ccf53a24615448117697f494

SHA256
5963297e6660586d55779912944414ca8e5ccdf2769419b779e145d5fc597c9f

SHA512
5c29c8c16be3a46cf64997fda0810953fa16c3f53fd8f7979e80a97849e23e36baca1cf84cf84a1404b55cbde8543c3d740c9397da576738a14c64a9962f00f7

Download Submit
memory/3700-0-0x0000000074BCE000-0x0000000074BCF000-memory.dmp

Filesize
4KB

Download
memory/3700-1-0x0000000000600000-0x000000000060C000-memory.dmp

Filesize
48KB

Download
memory/3700-2-0x0000000004FA0000-0x000000000503C000-memory.dmp

Filesize
624KB

Download
memory/3700-3-0x0000000005040000-0x00000000050A6000-memory.dmp

Filesize
408KB

Download
memory/3700-4-0x0000000074BC0000-0x0000000075370000-memory.dmp

Filesize
7.7MB

Download
memory/3700-5-0x0000000005DD0000-0x0000000006374000-memory.dmp

Filesize
5.6MB

Download
memory/3700-17-0x0000000074BC0000-0x0000000075370000-memory.dmp

Filesize
7.7MB

Download
memory/4308-16-0x0000000074BC0000-0x0000000075370000-memory.dmp

Filesize
7.7MB

Download
memory/4308-18-0x0000000074BC0000-0x0000000075370000-memory.dmp

Filesize
7.7MB

Download
memory/4308-19-0x0000000005C10000-0x0000000005CA2000-memory.dmp

Filesize
584KB

Download
memory/4308-20-0x0000000074BC0000-0x0000000075370000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads