limerat | 3d604bb259762a9bd3e000cdb0519abc1f852cdca1fe558f49733373f3e23198

Analysis

max time kernel
158s
max time network
163s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
29-01-2023 21:30

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General

Target

3d604bb259762a9bd3e000cdb0519abc1f852cdca1fe558f49733373f3e23198.exe
Size

147KB
MD5

a33390dc8b84abe30014c46d0f9353cc
SHA1

efbd6b925d943a5973d508acafbe8d5e1a3a9818
SHA256

3d604bb259762a9bd3e000cdb0519abc1f852cdca1fe558f49733373f3e23198
SHA512

15f40830c7847475fe959553bd375c66a994369fb01bed0e983e0b0c8ebe710963b232331bbad90aa384e5e184a5df92711ad8c91edf1880672c7428890e6b81
SSDEEP

3072:I3QT8B4Sv0tElYY28Ts2gawnHv28ifsPUAbGdZd:nTsx08PFYvS

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

Processes:

3d604bb259762a9bd3e000cdb0519abc1f852cdca1fe558f49733373f3e23198.exe

description	pid	Process	procid_target
PID 4644 set thread context of 2192	4644	3d604bb259762a9bd3e000cdb0519abc1f852cdca1fe558f49733373f3e23198.exe	82

Drops file in Windows directory 1 IoCs

Processes:

dw20.exe

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

Processes:

dw20.exe

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

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

dw20.exe

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

Processes:

dw20.exe

description	pid	Process
Token: SeRestorePrivilege	5000	dw20.exe
Token: SeBackupPrivilege	5000	dw20.exe
Token: SeBackupPrivilege	5000	dw20.exe
Token: SeBackupPrivilege	5000	dw20.exe
Token: SeBackupPrivilege	5000	dw20.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

3d604bb259762a9bd3e000cdb0519abc1f852cdca1fe558f49733373f3e23198.exe3d604bb259762a9bd3e000cdb0519abc1f852cdca1fe558f49733373f3e23198.exe

description	pid	Process	procid_target
PID 4644 wrote to memory of 2192	4644	3d604bb259762a9bd3e000cdb0519abc1f852cdca1fe558f49733373f3e23198.exe	82
PID 4644 wrote to memory of 2192	4644	3d604bb259762a9bd3e000cdb0519abc1f852cdca1fe558f49733373f3e23198.exe	82
PID 4644 wrote to memory of 2192	4644	3d604bb259762a9bd3e000cdb0519abc1f852cdca1fe558f49733373f3e23198.exe	82
PID 4644 wrote to memory of 2192	4644	3d604bb259762a9bd3e000cdb0519abc1f852cdca1fe558f49733373f3e23198.exe	82
PID 4644 wrote to memory of 2192	4644	3d604bb259762a9bd3e000cdb0519abc1f852cdca1fe558f49733373f3e23198.exe	82
PID 4644 wrote to memory of 2192	4644	3d604bb259762a9bd3e000cdb0519abc1f852cdca1fe558f49733373f3e23198.exe	82
PID 4644 wrote to memory of 2192	4644	3d604bb259762a9bd3e000cdb0519abc1f852cdca1fe558f49733373f3e23198.exe	82
PID 2192 wrote to memory of 5000	2192	3d604bb259762a9bd3e000cdb0519abc1f852cdca1fe558f49733373f3e23198.exe	83
PID 2192 wrote to memory of 5000	2192	3d604bb259762a9bd3e000cdb0519abc1f852cdca1fe558f49733373f3e23198.exe	83
PID 2192 wrote to memory of 5000	2192	3d604bb259762a9bd3e000cdb0519abc1f852cdca1fe558f49733373f3e23198.exe	83

C:\Users\Admin\AppData\Local\Temp\3d604bb259762a9bd3e000cdb0519abc1f852cdca1fe558f49733373f3e23198.exe
"C:\Users\Admin\AppData\Local\Temp\3d604bb259762a9bd3e000cdb0519abc1f852cdca1fe558f49733373f3e23198.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4644
- C:\Users\Admin\AppData\Local\Temp\3d604bb259762a9bd3e000cdb0519abc1f852cdca1fe558f49733373f3e23198.exe
  "C:\Users\Admin\AppData\Local\Temp\3d604bb259762a9bd3e000cdb0519abc1f852cdca1fe558f49733373f3e23198.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2192
- - 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:5000

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

memory/2192-133-0x0000000000000000-mapping.dmp

Download
memory/2192-134-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/2192-137-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Filesize
5.7MB

Download
memory/2192-138-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Filesize
5.7MB

Download
memory/4644-132-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Filesize
5.7MB

Download
memory/4644-136-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Filesize
5.7MB

Download
memory/5000-135-0x0000000000000000-mapping.dmp

Download