limerat | cad4b9b3faba5b2f535fc4e873e37b81ba38cd5a02e5d8eb2e344e34c1bd1f7a

Analysis

max time kernel
123s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
29/01/2023, 21:30

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General

Target
cad4b9b3faba5b2f535fc4e873e37b81ba38cd5a02e5d8eb2e344e34c1bd1f7a.exe
Size 147KB
Sample230129-1ce7esde24
SHA256 cad4b9b3faba5b2f535fc4e873e37b81ba38cd5a02e5d8eb2e344e34c1bd1f7a
MD5 cff2d790319ab17e0a5c50cd472ff240
SHA1 e58cf042b5ad0f69adfbe75c9fb9964c74642cf4
SHA512 4d8023912869d6ac7ac3b88c452a79104bb0ce39c2284df0ba02439d3d7dba6b776a86354b0eeb44d721a8007d0fe2eb2bb4a8ee66b24b5b2d0110f4440f343c
SSDEEP 3072:73QT8B4Sv0tElYY28Ts2gawnHv28ifsPUAbGdZq:8Tsx08PFYvS
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

limerat rat

Malware Config

Extracted

Family

limerat

Attributes

aes_key
IRj3SceatjDfweW/qMMw7g==
antivm
false
c2_url
https://pastebin.com/raw/Pzx225ZB
delay
3
download_payload
false
install
true
install_name
Audio Realtek Driver.exe
main_folder
AppData
pin_spread
true
sub_folder
\Audio Realtek Driver\
usb_spread
false

Signatures

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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2016 set thread context of 1856	2016	cad4b9b3faba5b2f535fc4e873e37b81ba38cd5a02e5d8eb2e344e34c1bd1f7a.exe	81

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\AppCompat\Programs\Amcache.hve.tmp	dw20.exe

Checks processor information in registry 2 TTPs 3 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	dw20.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	dw20.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeRestorePrivilege	3680	dw20.exe
Token: SeBackupPrivilege	3680	dw20.exe
Token: SeBackupPrivilege	3680	dw20.exe
Token: SeBackupPrivilege	3680	dw20.exe
Token: SeBackupPrivilege	3680	dw20.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2016 wrote to memory of 1856	2016	cad4b9b3faba5b2f535fc4e873e37b81ba38cd5a02e5d8eb2e344e34c1bd1f7a.exe	81
PID 2016 wrote to memory of 1856	2016	cad4b9b3faba5b2f535fc4e873e37b81ba38cd5a02e5d8eb2e344e34c1bd1f7a.exe	81
PID 2016 wrote to memory of 1856	2016	cad4b9b3faba5b2f535fc4e873e37b81ba38cd5a02e5d8eb2e344e34c1bd1f7a.exe	81
PID 2016 wrote to memory of 1856	2016	cad4b9b3faba5b2f535fc4e873e37b81ba38cd5a02e5d8eb2e344e34c1bd1f7a.exe	81
PID 2016 wrote to memory of 1856	2016	cad4b9b3faba5b2f535fc4e873e37b81ba38cd5a02e5d8eb2e344e34c1bd1f7a.exe	81
PID 2016 wrote to memory of 1856	2016	cad4b9b3faba5b2f535fc4e873e37b81ba38cd5a02e5d8eb2e344e34c1bd1f7a.exe	81
PID 2016 wrote to memory of 1856	2016	cad4b9b3faba5b2f535fc4e873e37b81ba38cd5a02e5d8eb2e344e34c1bd1f7a.exe	81
PID 1856 wrote to memory of 3680	1856	cad4b9b3faba5b2f535fc4e873e37b81ba38cd5a02e5d8eb2e344e34c1bd1f7a.exe	82
PID 1856 wrote to memory of 3680	1856	cad4b9b3faba5b2f535fc4e873e37b81ba38cd5a02e5d8eb2e344e34c1bd1f7a.exe	82
PID 1856 wrote to memory of 3680	1856	cad4b9b3faba5b2f535fc4e873e37b81ba38cd5a02e5d8eb2e344e34c1bd1f7a.exe	82

C:\Users\Admin\AppData\Local\Temp\cad4b9b3faba5b2f535fc4e873e37b81ba38cd5a02e5d8eb2e344e34c1bd1f7a.exe
"C:\Users\Admin\AppData\Local\Temp\cad4b9b3faba5b2f535fc4e873e37b81ba38cd5a02e5d8eb2e344e34c1bd1f7a.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2016
- C:\Users\Admin\AppData\Local\Temp\cad4b9b3faba5b2f535fc4e873e37b81ba38cd5a02e5d8eb2e344e34c1bd1f7a.exe
  "C:\Users\Admin\AppData\Local\Temp\cad4b9b3faba5b2f535fc4e873e37b81ba38cd5a02e5d8eb2e344e34c1bd1f7a.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1856
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
    dw20.exe -x -s 776
    3⤵
    - Drops file in Windows directory
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious use of AdjustPrivilegeToken
    PID:3680

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

cad4b9b3faba5b2f535fc4e873e37b81ba38cd5a02e5d8eb2e344e34c1bd1f7a.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\cad4b9b3faba5b2f535fc4e873e37b81ba38cd5a02e5d8eb2e344e34c1bd1f7a.exe.log
Size 128B
SHA256 e24033ceec97fd03402b03acaaabd1d1e378e83bb1683afbccac760e00f8ead5
MD5 a5dcc7c9c08af7dddd82be5b036a4416
SHA1 4f998ca1526d199e355ffb435bae111a2779b994
SHA512 56035de734836c0c39f0b48641c51c26adb6e79c6c65e23ca96603f71c95b8673e2ef853146e87efc899dd1878d0bbc2c82d91fbf0fce81c552048e986f9bb5a
MD5 SHA1 SHA512

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memory/1856-133-0x0000000000400000-0x000000000040C000-memory.dmp

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memory/1856-137-0x0000000074FD0000-0x0000000075581000-memory.dmp

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memory/2016-135-0x0000000074FD0000-0x0000000075581000-memory.dmp

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memory/2016-138-0x0000000074FD0000-0x0000000075581000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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