limerat | fc790cea14d04d9090ab085b585a8017ad469ebbce5c9d29c8d877ccf9e3efbf

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
12/06/2022, 10:18

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General

Target
fc790cea14d04d9090ab085b585a8017ad469ebbce5c9d29c8d877ccf9e3efbf.exe
Size 61KB
Sample220612-mb62vsggbp
SHA256 fc790cea14d04d9090ab085b585a8017ad469ebbce5c9d29c8d877ccf9e3efbf
MD5 bb2de5629dfeb812b45fb00a6fbadf4e
SHA1 e3a3642264eae88eba72c67933057f2dfc2dd2b6
SHA512 3d3a250e9c6ca842daf90d9b666796dc7e8cebce83ed3ab972db052f60fc70418c7aa3f45f45b0ab61f63e7621d147620f20734bc8556e6d614c49abb7eba28d
MD5 SHA1 SHA512

Score

10^/10

limerat rat

Malware Config

Extracted

Family

limerat

Wallets

1d15EibWVaZg8KADH1wR5phqhtyhbbdCc

Attributes

aes_key
batata1
antivm
true
c2_url
https://pastebin.com/raw/hqkeiAWx
delay
3
download_payload
false
install
true
install_name
twvrsvc.exe
main_folder
AppData
pin_spread
false
sub_folder
\TeamViewer\
usb_spread
true

Signatures

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

Executes dropped EXE 3 IoCs

pid	Process
4424	tvsxwrc.exe
4216	Cure Tool.exe
4068	twvrsvc.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	fc790cea14d04d9090ab085b585a8017ad469ebbce5c9d29c8d877ccf9e3efbf.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	tvsxwrc.exe

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	twvrsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	tvsxwrc.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	tvsxwrc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	twvrsvc.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
4028	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4068	twvrsvc.exe
Token: SeDebugPrivilege	4068	twvrsvc.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 5088 wrote to memory of 4424	5088	fc790cea14d04d9090ab085b585a8017ad469ebbce5c9d29c8d877ccf9e3efbf.exe	80
PID 5088 wrote to memory of 4424	5088	fc790cea14d04d9090ab085b585a8017ad469ebbce5c9d29c8d877ccf9e3efbf.exe	80
PID 5088 wrote to memory of 4424	5088	fc790cea14d04d9090ab085b585a8017ad469ebbce5c9d29c8d877ccf9e3efbf.exe	80
PID 5088 wrote to memory of 4216	5088	fc790cea14d04d9090ab085b585a8017ad469ebbce5c9d29c8d877ccf9e3efbf.exe	81
PID 5088 wrote to memory of 4216	5088	fc790cea14d04d9090ab085b585a8017ad469ebbce5c9d29c8d877ccf9e3efbf.exe	81
PID 5088 wrote to memory of 4216	5088	fc790cea14d04d9090ab085b585a8017ad469ebbce5c9d29c8d877ccf9e3efbf.exe	81
PID 4424 wrote to memory of 4028	4424	tvsxwrc.exe	83
PID 4424 wrote to memory of 4028	4424	tvsxwrc.exe	83
PID 4424 wrote to memory of 4028	4424	tvsxwrc.exe	83
PID 4424 wrote to memory of 4068	4424	tvsxwrc.exe	85
PID 4424 wrote to memory of 4068	4424	tvsxwrc.exe	85
PID 4424 wrote to memory of 4068	4424	tvsxwrc.exe	85

C:\Users\Admin\AppData\Local\Temp\fc790cea14d04d9090ab085b585a8017ad469ebbce5c9d29c8d877ccf9e3efbf.exe
"C:\Users\Admin\AppData\Local\Temp\fc790cea14d04d9090ab085b585a8017ad469ebbce5c9d29c8d877ccf9e3efbf.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5088
- C:\Users\Admin\AppData\Local\Temp\tvsxwrc.exe
  "C:\Users\Admin\AppData\Local\Temp\tvsxwrc.exe"
  2⤵
  - Executes dropped EXE
  - Checks computer location settings
  - Maps connected drives based on registry
  - Suspicious use of WriteProcessMemory
  PID:4424
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc ONLOGON /RL HIGHEST /tn LimeRAT-Admin /tr "'C:\Users\Admin\AppData\Roaming\TeamViewer\twvrsvc.exe'"
    3⤵
    - Creates scheduled task(s)
    PID:4028
- - C:\Users\Admin\AppData\Roaming\TeamViewer\twvrsvc.exe
    "C:\Users\Admin\AppData\Roaming\TeamViewer\twvrsvc.exe"
    3⤵
    - Executes dropped EXE
    - Maps connected drives based on registry
    - Suspicious use of AdjustPrivilegeToken
    PID:4068
- C:\Users\Admin\AppData\Local\Temp\Cure Tool.exe
  "C:\Users\Admin\AppData\Local\Temp\Cure Tool.exe"
  2⤵
  - Executes dropped EXE
  PID:4216

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

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

Cure Tool.exe

Path C:\Users\Admin\AppData\Local\Temp\Cure Tool.exe
Size 9KB
SHA256 8d0ab3ac5f70ab0d16c1c3f1f66e4580e4116175d30bece8b14514858c9174dc
MD5 7658c455f3acdc2b574da9f863855f01
SHA1 c05e0e3ccfb01bec9e6e4f8592fc21fe8a991b32
SHA512 7325535c7228542cecf43c2042dd07caee54d8f61a49ea5750508f7ed27ad0f5b24c62a023c0c8f675bb8c077720d60565338ce10754ae098ec7d47bf3f83730
SSDEEP 192:QB+LppLO0OTdyFnEKxx0hRu6nC48MqlkzpwIqyi:k+FRYxKxWhRXC48Ezpwdy
MD5 SHA1 SHA512 SSDEEP

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Cure Tool.exe

Path C:\Users\Admin\AppData\Local\Temp\Cure Tool.exe
Size 9KB
SHA256 8d0ab3ac5f70ab0d16c1c3f1f66e4580e4116175d30bece8b14514858c9174dc
MD5 7658c455f3acdc2b574da9f863855f01
SHA1 c05e0e3ccfb01bec9e6e4f8592fc21fe8a991b32
SHA512 7325535c7228542cecf43c2042dd07caee54d8f61a49ea5750508f7ed27ad0f5b24c62a023c0c8f675bb8c077720d60565338ce10754ae098ec7d47bf3f83730
SSDEEP 192:QB+LppLO0OTdyFnEKxx0hRu6nC48MqlkzpwIqyi:k+FRYxKxWhRXC48Ezpwdy
MD5 SHA1 SHA512 SSDEEP

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tvsxwrc.exe

Path C:\Users\Admin\AppData\Local\Temp\tvsxwrc.exe
Size 28KB
SHA256 5963297e6660586d55779912944414ca8e5ccdf2769419b779e145d5fc597c9f
MD5 7374806e51b404de9c639cbff4226eed
SHA1 6c7466e48018fa00ccf53a24615448117697f494
SHA512 5c29c8c16be3a46cf64997fda0810953fa16c3f53fd8f7979e80a97849e23e36baca1cf84cf84a1404b55cbde8543c3d740c9397da576738a14c64a9962f00f7
SSDEEP 768:bzRbFf8Wp2hBhLXCidmDUjFQuval1IjyJ:fNp8Wp2hBhui8kFfgqjO
MD5 SHA1 SHA512 SSDEEP

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tvsxwrc.exe

Path C:\Users\Admin\AppData\Local\Temp\tvsxwrc.exe
Size 28KB
SHA256 5963297e6660586d55779912944414ca8e5ccdf2769419b779e145d5fc597c9f
MD5 7374806e51b404de9c639cbff4226eed
SHA1 6c7466e48018fa00ccf53a24615448117697f494
SHA512 5c29c8c16be3a46cf64997fda0810953fa16c3f53fd8f7979e80a97849e23e36baca1cf84cf84a1404b55cbde8543c3d740c9397da576738a14c64a9962f00f7
SSDEEP 768:bzRbFf8Wp2hBhLXCidmDUjFQuval1IjyJ:fNp8Wp2hBhui8kFfgqjO
MD5 SHA1 SHA512 SSDEEP

Submit Download

twvrsvc.exe

Path C:\Users\Admin\AppData\Roaming\TeamViewer\twvrsvc.exe
Size 28KB
SHA256 5963297e6660586d55779912944414ca8e5ccdf2769419b779e145d5fc597c9f
MD5 7374806e51b404de9c639cbff4226eed
SHA1 6c7466e48018fa00ccf53a24615448117697f494
SHA512 5c29c8c16be3a46cf64997fda0810953fa16c3f53fd8f7979e80a97849e23e36baca1cf84cf84a1404b55cbde8543c3d740c9397da576738a14c64a9962f00f7
SSDEEP 768:bzRbFf8Wp2hBhLXCidmDUjFQuval1IjyJ:fNp8Wp2hBhui8kFfgqjO
MD5 SHA1 SHA512 SSDEEP

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twvrsvc.exe

Path C:\Users\Admin\AppData\Roaming\TeamViewer\twvrsvc.exe
Size 28KB
SHA256 5963297e6660586d55779912944414ca8e5ccdf2769419b779e145d5fc597c9f
MD5 7374806e51b404de9c639cbff4226eed
SHA1 6c7466e48018fa00ccf53a24615448117697f494
SHA512 5c29c8c16be3a46cf64997fda0810953fa16c3f53fd8f7979e80a97849e23e36baca1cf84cf84a1404b55cbde8543c3d740c9397da576738a14c64a9962f00f7
SSDEEP 768:bzRbFf8Wp2hBhLXCidmDUjFQuval1IjyJ:fNp8Wp2hBhui8kFfgqjO
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/4068-148-0x0000000006700000-0x0000000006792000-memory.dmp

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memory/4216-139-0x0000000000F50000-0x0000000000F58000-memory.dmp

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memory/4424-141-0x0000000005840000-0x00000000058DC000-memory.dmp

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memory/4424-142-0x00000000058E0000-0x0000000005946000-memory.dmp

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memory/4424-143-0x0000000006540000-0x0000000006AE4000-memory.dmp

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memory/4424-140-0x0000000000ED0000-0x0000000000EDC000-memory.dmp

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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