limerat | 7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16

Analysis

max time kernel
105s
max time network
34s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
29-01-2023 19:26

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General

Target

7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe
Size

79KB
MD5

771a90e168eb38cf7b43ae841759a68f
SHA1

67ea99261e3fad89dce8771c8f9ed4e3c6f9d35a
SHA256

7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16
SHA512

98a4663f05be6f56ece305da44d2a8df3d5d17b72d1b85489b13c81745c5c16c711d3e3a68d5c76b5b7a32f9ada3df85ac43bd2df87ea801c395d0dc7a041100
SSDEEP

1536:S5CmrfW0509dVoxdVps8KQ+lu9TbdbfRA:DD3uxMl4TbdbfRA

Score

10^/10

limerat evasion persistence rat trojan

Malware Config

Extracted

Family

limerat

Wallets

1PwPgp5XGS4VapRjQM1XijgAs2psFeZVGM

Attributes

aes_key
#C^7M3ha6&%678n3VRZet)-D*;zH8Hxa
antivm
true
c2_url
https://pastebin.com/raw/6mZktVr5
delay
51
download_payload
false
install
true
install_name
Windows Update Assistant.exe
main_folder
UserProfile
pin_spread
false
sub_folder
\Microsoft\
usb_spread
true

Signatures

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

Executes dropped EXE 2 IoCs

Processes:

Windows Update Assistant.exeWindows Update Assistant.exe

pid	Process
1720	Windows Update Assistant.exe
828	Windows Update Assistant.exe

Looks for VMWare Tools registry key 2 TTPs 2 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

Processes:

Windows Update Assistant.exe7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\VMware, Inc.\Vmware Tools	Windows Update Assistant.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\VMware, Inc.\Vmware Tools	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe

Loads dropped DLL 2 IoCs

Processes:

7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exeWindows Update Assistant.exe

pid	Process
1476	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe
1720	Windows Update Assistant.exe

Windows security modification 2 TTPs 3 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exeWindows Update Assistant.exe

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Real-Time Protection	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Real-Time Protection\DisableRealtimeMonitoring = "1"	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Real-Time Protection\DisableRealtimeMonitoring = "1"	Windows Update Assistant.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\Windows Services = "C:\\Users\\Admin\\AppData\\Roaming\\Windows Update Folder\\Windows Update.exe"	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

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

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exeWindows Update Assistant.exe

description	pid	Process	procid_target
PID 1996 set thread context of 1476	1996	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe	28
PID 1720 set thread context of 828	1720	Windows Update Assistant.exe	33

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
1292	schtasks.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exeWindows Update Assistant.exe

description	pid	Process	procid_target
PID 1996 wrote to memory of 1476	1996	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe	28
PID 1996 wrote to memory of 1476	1996	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe	28
PID 1996 wrote to memory of 1476	1996	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe	28
PID 1996 wrote to memory of 1476	1996	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe	28
PID 1996 wrote to memory of 1476	1996	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe	28
PID 1996 wrote to memory of 1476	1996	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe	28
PID 1996 wrote to memory of 1476	1996	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe	28
PID 1996 wrote to memory of 1476	1996	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe	28
PID 1476 wrote to memory of 1292	1476	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe	30
PID 1476 wrote to memory of 1292	1476	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe	30
PID 1476 wrote to memory of 1292	1476	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe	30
PID 1476 wrote to memory of 1292	1476	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe	30
PID 1476 wrote to memory of 1720	1476	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe	32
PID 1476 wrote to memory of 1720	1476	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe	32
PID 1476 wrote to memory of 1720	1476	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe	32
PID 1476 wrote to memory of 1720	1476	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe	32
PID 1476 wrote to memory of 1720	1476	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe	32
PID 1476 wrote to memory of 1720	1476	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe	32
PID 1476 wrote to memory of 1720	1476	7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe	32
PID 1720 wrote to memory of 828	1720	Windows Update Assistant.exe	33
PID 1720 wrote to memory of 828	1720	Windows Update Assistant.exe	33
PID 1720 wrote to memory of 828	1720	Windows Update Assistant.exe	33
PID 1720 wrote to memory of 828	1720	Windows Update Assistant.exe	33
PID 1720 wrote to memory of 828	1720	Windows Update Assistant.exe	33
PID 1720 wrote to memory of 828	1720	Windows Update Assistant.exe	33
PID 1720 wrote to memory of 828	1720	Windows Update Assistant.exe	33
PID 1720 wrote to memory of 828	1720	Windows Update Assistant.exe	33
PID 1720 wrote to memory of 828	1720	Windows Update Assistant.exe	33
PID 1720 wrote to memory of 828	1720	Windows Update Assistant.exe	33
PID 1720 wrote to memory of 828	1720	Windows Update Assistant.exe	33

C:\Users\Admin\AppData\Local\Temp\7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe
"C:\Users\Admin\AppData\Local\Temp\7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe"
1⤵
- Looks for VMWare Tools registry key
- Windows security modification
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1996
- C:\Users\Admin\AppData\Local\Temp\7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16.exe
  "{path}"
  2⤵
  - Loads dropped DLL
  - Maps connected drives based on registry
  - Suspicious use of WriteProcessMemory
  PID:1476
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc ONLOGON /RL HIGHEST /tn LimeRAT-Admin /tr "'C:\Users\Admin\Microsoft\Windows Update Assistant.exe'"
    3⤵
    - Creates scheduled task(s)
    PID:1292
- - C:\Users\Admin\Microsoft\Windows Update Assistant.exe
    "C:\Users\Admin\Microsoft\Windows Update Assistant.exe"
    3⤵
    - Executes dropped EXE
    - Looks for VMWare Tools registry key
    - Loads dropped DLL
    - Windows security modification
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1720
  - - C:\Users\Admin\Microsoft\Windows Update Assistant.exe
      "{path}"
      4⤵
      Executes dropped EXE
      PID:828

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Disabling Security Tools

T1089

Modify Registry

T1112

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\Microsoft\Windows Update Assistant.exe

Filesize
79KB

MD5
771a90e168eb38cf7b43ae841759a68f

SHA1
67ea99261e3fad89dce8771c8f9ed4e3c6f9d35a

SHA256
7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16

SHA512
98a4663f05be6f56ece305da44d2a8df3d5d17b72d1b85489b13c81745c5c16c711d3e3a68d5c76b5b7a32f9ada3df85ac43bd2df87ea801c395d0dc7a041100

Download Submit
C:\Users\Admin\Microsoft\Windows Update Assistant.exe

Filesize
79KB

MD5
771a90e168eb38cf7b43ae841759a68f

SHA1
67ea99261e3fad89dce8771c8f9ed4e3c6f9d35a

SHA256
7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16

SHA512
98a4663f05be6f56ece305da44d2a8df3d5d17b72d1b85489b13c81745c5c16c711d3e3a68d5c76b5b7a32f9ada3df85ac43bd2df87ea801c395d0dc7a041100

Download Submit
C:\Users\Admin\Microsoft\Windows Update Assistant.exe

Filesize
79KB

MD5
771a90e168eb38cf7b43ae841759a68f

SHA1
67ea99261e3fad89dce8771c8f9ed4e3c6f9d35a

SHA256
7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16

SHA512
98a4663f05be6f56ece305da44d2a8df3d5d17b72d1b85489b13c81745c5c16c711d3e3a68d5c76b5b7a32f9ada3df85ac43bd2df87ea801c395d0dc7a041100

Download Submit
\Users\Admin\Microsoft\Windows Update Assistant.exe

Filesize
79KB

MD5
771a90e168eb38cf7b43ae841759a68f

SHA1
67ea99261e3fad89dce8771c8f9ed4e3c6f9d35a

SHA256
7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16

SHA512
98a4663f05be6f56ece305da44d2a8df3d5d17b72d1b85489b13c81745c5c16c711d3e3a68d5c76b5b7a32f9ada3df85ac43bd2df87ea801c395d0dc7a041100

Download Submit
\Users\Admin\Microsoft\Windows Update Assistant.exe

Filesize
79KB

MD5
771a90e168eb38cf7b43ae841759a68f

SHA1
67ea99261e3fad89dce8771c8f9ed4e3c6f9d35a

SHA256
7eabfd11071c795239758dbe44aa1311e89db5f1bd488fb3133757eba8842e16

SHA512
98a4663f05be6f56ece305da44d2a8df3d5d17b72d1b85489b13c81745c5c16c711d3e3a68d5c76b5b7a32f9ada3df85ac43bd2df87ea801c395d0dc7a041100

Download Submit
memory/828-81-0x0000000000408CBE-mapping.dmp

Download
memory/1292-68-0x0000000000000000-mapping.dmp

Download
memory/1476-59-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/1476-63-0x0000000000408CBE-mapping.dmp

Download
memory/1476-65-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/1476-67-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/1476-62-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/1476-61-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/1476-58-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/1720-71-0x0000000000000000-mapping.dmp

Download
memory/1720-74-0x0000000001290000-0x00000000012AC000-memory.dmp

Filesize
112KB

Download
memory/1996-54-0x0000000000080000-0x000000000009C000-memory.dmp

Filesize
112KB

Download
memory/1996-57-0x00000000003B0000-0x00000000003BC000-memory.dmp

Filesize
48KB

Download
memory/1996-56-0x0000000075631000-0x0000000075633000-memory.dmp

Filesize
8KB

Download
memory/1996-55-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download