limerat | 4adcc73ce3501f990fc95bfb0ebca1a4ca61054b137a34c7bc9435cfdd2b7f6a

General

Target
masarati.exe
Size 28KB
Sample200817-ptdwgts3ea
SHA256 4adcc73ce3501f990fc95bfb0ebca1a4ca61054b137a34c7bc9435cfdd2b7f6a
MD5 e7e752581b91e5bf2eccb44298128ec5
SHA1 e321813c52ec62ebadce88cf8afaea4415186129
SHA512 2681a39b47f8620cef044b4a8336fb3e9f1261ab595b540746aabc5eba26b238c5c11383d2d3b829d56d5279e78587e68e7875a585e702fba57b35719e6c4e82
MD5 SHA1 SHA512

Score

10^/10

limerat rat

Family

Wallets

Attributes

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

Executes dropped EXE 1 IoCs

pid	Process
4064	officework.exe

Loads dropped DLL 2 IoCs

pid	Process
4064	officework.exe
4064	officework.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064
Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

Maps connected drives based on registry 3 TTPs 4 IoCs

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

Query Registry

Peripheral Device Discovery

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	officework.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum\0	officework.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	masarati.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum\0	masarati.exe

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.

Scheduled Task

pid	Process
1672	schtasks.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4064	officework.exe
Token: SeDebugPrivilege	4064	officework.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3844 wrote to memory of 1672	3844	masarati.exe	68
PID 3844 wrote to memory of 1672	3844	masarati.exe	68
PID 3844 wrote to memory of 1672	3844	masarati.exe	68
PID 3844 wrote to memory of 4064	3844	masarati.exe	70
PID 3844 wrote to memory of 4064	3844	masarati.exe	70
PID 3844 wrote to memory of 4064	3844	masarati.exe	70
PID 4064 wrote to memory of 1748	4064	officework.exe	77
PID 4064 wrote to memory of 1748	4064	officework.exe	77
PID 4064 wrote to memory of 1748	4064	officework.exe	77
PID 1748 wrote to memory of 2120	1748	vbc.exe	79
PID 1748 wrote to memory of 2120	1748	vbc.exe	79
PID 1748 wrote to memory of 2120	1748	vbc.exe	79

C:\Users\Admin\AppData\Local\Temp\masarati.exe
"C:\Users\Admin\AppData\Local\Temp\masarati.exe"
1⤵
- Maps connected drives based on registry
- Suspicious use of WriteProcessMemory
PID:3844
- C:\Windows\SysWOW64\schtasks.exe
  schtasks /create /f /sc ONLOGON /RL HIGHEST /tn LimeRAT-Admin /tr "'C:\Users\Admin\AppData\Local\Temp\officework.exe'"
  2⤵
  - Creates scheduled task(s)
  PID:1672
- C:\Users\Admin\AppData\Local\Temp\officework.exe
  "C:\Users\Admin\AppData\Local\Temp\officework.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Maps connected drives based on registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4064
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe" /noconfig @"C:\Users\Admin\AppData\Local\Temp\krec14sq\krec14sq.cmdline"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1748
  - - C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe
      C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES7526.tmp" "C:\Users\Admin\AppData\Local\Temp\vbcD1C54B189B7468AA96E97F512E20F4.TMP"
      4⤵
      PID:2120