limerat | 4adcc73ce3501f990fc95bfb0ebca1a4ca61054b137a34c7bc9435cfdd2b7f6a

Analysis

max time kernel
149s
max time network
156s
platform
windows7_x64
resource
win7
submitted
17/08/2020, 18:44

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General

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

Score

10^/10

limerat rat

Malware Config

Extracted

Family

limerat

Wallets

12abaLRKG8Mg2F6V5jU3ek8FgMopZd9KEg

Attributes

aes_key
4
antivm
true
c2_url
https://pastebin.com/raw/uSLpq9XN
delay
5
download_payload
false
install
true
install_name
officework.exe
main_folder
Temp
pin_spread
true
sub_folder
\
usb_spread
false

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
1984	officework.exe

Loads dropped DLL 4 IoCs

pid	Process
1768	masarati.exe
1768	masarati.exe
1984	officework.exe
1984	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

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

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

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

pid	Process
1944	schtasks.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1984	officework.exe
1984	officework.exe
1984	officework.exe
1984	officework.exe
1984	officework.exe
1984	officework.exe
1984	officework.exe
1984	officework.exe
1984	officework.exe
1984	officework.exe
1984	officework.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1984	officework.exe
Token: SeDebugPrivilege	1984	officework.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 1768 wrote to memory of 1944	1768	masarati.exe	25
PID 1768 wrote to memory of 1944	1768	masarati.exe	25
PID 1768 wrote to memory of 1944	1768	masarati.exe	25
PID 1768 wrote to memory of 1944	1768	masarati.exe	25
PID 1768 wrote to memory of 1984	1768	masarati.exe	27
PID 1768 wrote to memory of 1984	1768	masarati.exe	27
PID 1768 wrote to memory of 1984	1768	masarati.exe	27
PID 1768 wrote to memory of 1984	1768	masarati.exe	27
PID 1984 wrote to memory of 1552	1984	officework.exe	30
PID 1984 wrote to memory of 1552	1984	officework.exe	30
PID 1984 wrote to memory of 1552	1984	officework.exe	30
PID 1984 wrote to memory of 1552	1984	officework.exe	30
PID 1552 wrote to memory of 432	1552	vbc.exe	32
PID 1552 wrote to memory of 432	1552	vbc.exe	32
PID 1552 wrote to memory of 432	1552	vbc.exe	32
PID 1552 wrote to memory of 432	1552	vbc.exe	32
PID 1984 wrote to memory of 1040	1984	officework.exe	33
PID 1984 wrote to memory of 1040	1984	officework.exe	33
PID 1984 wrote to memory of 1040	1984	officework.exe	33
PID 1984 wrote to memory of 1040	1984	officework.exe	33
PID 1040 wrote to memory of 1964	1040	vbc.exe	35
PID 1040 wrote to memory of 1964	1040	vbc.exe	35
PID 1040 wrote to memory of 1964	1040	vbc.exe	35
PID 1040 wrote to memory of 1964	1040	vbc.exe	35
PID 1984 wrote to memory of 1980	1984	officework.exe	36
PID 1984 wrote to memory of 1980	1984	officework.exe	36
PID 1984 wrote to memory of 1980	1984	officework.exe	36
PID 1984 wrote to memory of 1980	1984	officework.exe	36
PID 1980 wrote to memory of 1848	1980	vbc.exe	38
PID 1980 wrote to memory of 1848	1980	vbc.exe	38
PID 1980 wrote to memory of 1848	1980	vbc.exe	38
PID 1980 wrote to memory of 1848	1980	vbc.exe	38
PID 1984 wrote to memory of 1884	1984	officework.exe	39
PID 1984 wrote to memory of 1884	1984	officework.exe	39
PID 1984 wrote to memory of 1884	1984	officework.exe	39
PID 1984 wrote to memory of 1884	1984	officework.exe	39
PID 1884 wrote to memory of 2016	1884	vbc.exe	41
PID 1884 wrote to memory of 2016	1884	vbc.exe	41
PID 1884 wrote to memory of 2016	1884	vbc.exe	41
PID 1884 wrote to memory of 2016	1884	vbc.exe	41

C:\Users\Admin\AppData\Local\Temp\masarati.exe
"C:\Users\Admin\AppData\Local\Temp\masarati.exe"
1⤵
- Loads dropped DLL
- Maps connected drives based on registry
- Suspicious use of WriteProcessMemory
PID:1768
- 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:1944
- 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:1984
- - 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\xagjagst\xagjagst.cmdline"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1552
  - - 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\RESB220.tmp" "C:\Users\Admin\AppData\Local\Temp\vbcB21F.tmp"
      4⤵
      PID:432
- - 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\ezja5cfx\ezja5cfx.cmdline"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1040
  - - 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\RESB2BC.tmp" "C:\Users\Admin\AppData\Local\Temp\vbcB2BB.tmp"
      4⤵
      PID:1964
- - 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\yctex3jo\yctex3jo.cmdline"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1980
  - - 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\RESB348.tmp" "C:\Users\Admin\AppData\Local\Temp\vbcB347.tmp"
      4⤵
      PID:1848
- - 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\dumowlai\dumowlai.cmdline"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1884
  - - 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\RESB3D4.tmp" "C:\Users\Admin\AppData\Local\Temp\vbcB3D3.tmp"
      4⤵
      PID:2016