limerat | a716b5f8a785fdbd248b36963d8a797083bf9d05dc4ae50b10536dbca81f4301

Resubmissions

21-01-2023 16:23

230121-tv84wsda86 10

21-01-2023 16:16

230121-tqsakseh6y 10

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
21-01-2023 16:16

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General

Target

c7d749686aa87a0826f47179002820dd.exe
Size

28KB
MD5

c7d749686aa87a0826f47179002820dd
SHA1

11e6c74a32be6e02d2c7ebb2b10b562cfaa16c9f
SHA256

a716b5f8a785fdbd248b36963d8a797083bf9d05dc4ae50b10536dbca81f4301
SHA512

7764ead079cd485c5cd2e069b69a8eca80a49f1e80d7a9426d71c5dc648a6e9cf42711255c947951f04dfa2227770714c376b43782d658b0b6826fa14d1fb4fd
SSDEEP

384:OB+Sbj6NKEHU637AHtSnGqDC3qSKvDKNrCeJE3WNgjLxC1zdcY2G1jVFQro3lcTe:EpE0637wtt3qSI45NmWdcJaxN7j

Score

10^/10

limerat rat

Malware Config

Extracted

Family

limerat

Attributes

aes_key
a
antivm
true
c2_url
https://pastebin.com/raw/CWD9meJm
delay
3
download_payload
false
install
true
install_name
winIogon.exe
main_folder
AppData
pin_spread
true
sub_folder
\Local\
usb_spread
true

Signatures

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

Executes dropped EXE 1 IoCs

Processes:

winIogon.exe

pid	Process
1400	winIogon.exe

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:

c7d749686aa87a0826f47179002820dd.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	c7d749686aa87a0826f47179002820dd.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). Likely ransomware behaviour.

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

T1053

Processes:

schtasks.exe

pid	Process
1688	schtasks.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

Processes:

winIogon.exe

pid	Process
1400	winIogon.exe
1400	winIogon.exe
1400	winIogon.exe
1400	winIogon.exe
1400	winIogon.exe
1400	winIogon.exe
1400	winIogon.exe
1400	winIogon.exe
1400	winIogon.exe
1400	winIogon.exe
1400	winIogon.exe
1400	winIogon.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

winIogon.exe

description	pid	Process
Token: SeDebugPrivilege	1400	winIogon.exe
Token: SeDebugPrivilege	1400	winIogon.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

c7d749686aa87a0826f47179002820dd.exe

description	pid	Process	procid_target
PID 4072 wrote to memory of 1688	4072	c7d749686aa87a0826f47179002820dd.exe	85
PID 4072 wrote to memory of 1688	4072	c7d749686aa87a0826f47179002820dd.exe	85
PID 4072 wrote to memory of 1688	4072	c7d749686aa87a0826f47179002820dd.exe	85
PID 4072 wrote to memory of 1400	4072	c7d749686aa87a0826f47179002820dd.exe	88
PID 4072 wrote to memory of 1400	4072	c7d749686aa87a0826f47179002820dd.exe	88
PID 4072 wrote to memory of 1400	4072	c7d749686aa87a0826f47179002820dd.exe	88

C:\Users\Admin\AppData\Local\Temp\c7d749686aa87a0826f47179002820dd.exe
"C:\Users\Admin\AppData\Local\Temp\c7d749686aa87a0826f47179002820dd.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4072
- C:\Windows\SysWOW64\schtasks.exe
  schtasks /create /f /sc ONLOGON /RL HIGHEST /tn LimeRAT-Admin /tr "'C:\Users\Admin\AppData\Roaming\Local\winIogon.exe'"
  2⤵
  - Creates scheduled task(s)
  PID:1688
- C:\Users\Admin\AppData\Roaming\Local\winIogon.exe
  "C:\Users\Admin\AppData\Roaming\Local\winIogon.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1400

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Web Service

T1102

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Local\winIogon.exe

Filesize
28KB

MD5
c7d749686aa87a0826f47179002820dd

SHA1
11e6c74a32be6e02d2c7ebb2b10b562cfaa16c9f

SHA256
a716b5f8a785fdbd248b36963d8a797083bf9d05dc4ae50b10536dbca81f4301

SHA512
7764ead079cd485c5cd2e069b69a8eca80a49f1e80d7a9426d71c5dc648a6e9cf42711255c947951f04dfa2227770714c376b43782d658b0b6826fa14d1fb4fd

Download Submit
C:\Users\Admin\AppData\Roaming\Local\winIogon.exe

Filesize
28KB

MD5
c7d749686aa87a0826f47179002820dd

SHA1
11e6c74a32be6e02d2c7ebb2b10b562cfaa16c9f

SHA256
a716b5f8a785fdbd248b36963d8a797083bf9d05dc4ae50b10536dbca81f4301

SHA512
7764ead079cd485c5cd2e069b69a8eca80a49f1e80d7a9426d71c5dc648a6e9cf42711255c947951f04dfa2227770714c376b43782d658b0b6826fa14d1fb4fd

Download Submit
memory/1400-137-0x0000000000000000-mapping.dmp

Download
memory/1400-140-0x00000000072C0000-0x0000000007352000-memory.dmp

Filesize
584KB

Download
memory/1688-136-0x0000000000000000-mapping.dmp

Download
memory/4072-132-0x0000000000850000-0x000000000085C000-memory.dmp

Filesize
48KB

Download
memory/4072-133-0x00000000051E0000-0x000000000527C000-memory.dmp

Filesize
624KB

Download
memory/4072-134-0x0000000005280000-0x00000000052E6000-memory.dmp

Filesize
408KB

Download
memory/4072-135-0x0000000005E90000-0x0000000006434000-memory.dmp

Filesize
5.6MB

Download