limerat | 9bb9a1974de3b7ca8de3fd9afd7fb0f92d8f24c33b651584b2d7e2d0bd0da2fe

Analysis

max time kernel
147s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
20-01-2024 14:08

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General

Target

bTcG.exe
Size

28KB
MD5

8e1bb22b17551346730179e6616eb42e
SHA1

7d2482fd93f0824e4353522c68c0fd39af445fc0
SHA256

9bb9a1974de3b7ca8de3fd9afd7fb0f92d8f24c33b651584b2d7e2d0bd0da2fe
SHA512

ec3a09f32393ce91486342712e200d4d0e432f0df90a1e58dd8251281c5257372a31c50db1b5a3a0fb552fa179199d88359c07b63d6b896188dfe32cb5d18ee6
SSDEEP

768:EpDU6F1w9pXlmjF845NonMfo3z3aNHm4j:Epb1w9pIphknMAuH5

Score

10^/10

limerat rat

Malware Config

Extracted

Family

limerat

Attributes

aes_key
Kronic
antivm
true
c2_url
https://pastebin.com/raw/jxx7yjgK
delay
3
download_payload
false
install
true
install_name
MSIbuilder.exe
main_folder
AppData
pin_spread
true
sub_folder
\Service Windows\
usb_spread
true

Extracted

Family

limerat

Attributes

antivm
false
c2_url
https://pastebin.com/raw/jxx7yjgK
download_payload
false
install
false
pin_spread
false
usb_spread
false

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:

bTcG.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation bTcG.exe
Executes dropped EXE 1 IoCs

Processes:

MSIbuilder.exe

pid process

2864 MSIbuilder.exe
Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
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

1972 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

MSIbuilder.exe

description pid process

Token: SeDebugPrivilege 2864 MSIbuilder.exe
Token: SeDebugPrivilege 2864 MSIbuilder.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation	bTcG.exe

pid	process
2864	MSIbuilder.exe

pid	process
1972	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	2864	MSIbuilder.exe
Token: SeDebugPrivilege	2864	MSIbuilder.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

bTcG.exe

description	pid	process	target process
PID 2456 wrote to memory of 1972	2456	bTcG.exe	schtasks.exe
PID 2456 wrote to memory of 1972	2456	bTcG.exe	schtasks.exe
PID 2456 wrote to memory of 1972	2456	bTcG.exe	schtasks.exe
PID 2456 wrote to memory of 2864	2456	bTcG.exe	MSIbuilder.exe
PID 2456 wrote to memory of 2864	2456	bTcG.exe	MSIbuilder.exe
PID 2456 wrote to memory of 2864	2456	bTcG.exe	MSIbuilder.exe

C:\Users\Admin\AppData\Local\Temp\bTcG.exe
"C:\Users\Admin\AppData\Local\Temp\bTcG.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2456
- C:\Windows\SysWOW64\schtasks.exe
  schtasks /create /f /sc ONLOGON /RL HIGHEST /tn LimeRAT-Admin /tr "'C:\Users\Admin\AppData\Roaming\Service Windows\MSIbuilder.exe'"
  2⤵
  - Creates scheduled task(s)
  PID:1972
- C:\Users\Admin\AppData\Roaming\Service Windows\MSIbuilder.exe
  "C:\Users\Admin\AppData\Roaming\Service Windows\MSIbuilder.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2864

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Service Windows\MSIbuilder.exe

Filesize
28KB

MD5
8e1bb22b17551346730179e6616eb42e

SHA1
7d2482fd93f0824e4353522c68c0fd39af445fc0

SHA256
9bb9a1974de3b7ca8de3fd9afd7fb0f92d8f24c33b651584b2d7e2d0bd0da2fe

SHA512
ec3a09f32393ce91486342712e200d4d0e432f0df90a1e58dd8251281c5257372a31c50db1b5a3a0fb552fa179199d88359c07b63d6b896188dfe32cb5d18ee6

Download Submit
memory/2456-0-0x0000000000220000-0x000000000022C000-memory.dmp

Filesize
48KB

Download
memory/2456-1-0x0000000074410000-0x0000000074BC0000-memory.dmp

Filesize
7.7MB

Download
memory/2456-2-0x0000000004BB0000-0x0000000004C4C000-memory.dmp

Filesize
624KB

Download
memory/2456-3-0x0000000004CF0000-0x0000000004D56000-memory.dmp

Filesize
408KB

Download
memory/2456-4-0x0000000004B50000-0x0000000004B60000-memory.dmp

Filesize
64KB

Download
memory/2456-5-0x0000000005870000-0x0000000005E14000-memory.dmp

Filesize
5.6MB

Download
memory/2456-15-0x0000000074410000-0x0000000074BC0000-memory.dmp

Filesize
7.7MB

Download
memory/2864-16-0x0000000074410000-0x0000000074BC0000-memory.dmp

Filesize
7.7MB

Download
memory/2864-17-0x0000000002C50000-0x0000000002C60000-memory.dmp

Filesize
64KB

Download
memory/2864-18-0x0000000074410000-0x0000000074BC0000-memory.dmp

Filesize
7.7MB

Download
memory/2864-19-0x0000000002C50000-0x0000000002C60000-memory.dmp

Filesize
64KB

Download