Malware Analysis Report

2024-11-16 13:08

Sample ID 220615-bwcg7seedr
Target 2ba261eaeefcfbd8a6ee73e31c640ccff59e316158fcef0e0bc48ad1c04a5440
SHA256 2ba261eaeefcfbd8a6ee73e31c640ccff59e316158fcef0e0bc48ad1c04a5440
Tags
upx limerat rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

2ba261eaeefcfbd8a6ee73e31c640ccff59e316158fcef0e0bc48ad1c04a5440

Threat Level: Known bad

The file 2ba261eaeefcfbd8a6ee73e31c640ccff59e316158fcef0e0bc48ad1c04a5440 was found to be: Known bad.

Malicious Activity Summary

upx limerat rat

LimeRAT

UPX packed file

Drops startup file

Legitimate hosting services abused for malware hosting/C2

Maps connected drives based on registry

Suspicious use of SetThreadContext

AutoIT Executable

Modifies system certificate store

Suspicious use of WriteProcessMemory

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-06-15 01:29

Signatures

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A

AutoIT Executable

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-06-15 01:29

Reported

2022-06-15 04:16

Platform

win7-20220414-en

Max time kernel

150s

Max time network

177s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2ba261eaeefcfbd8a6ee73e31c640ccff59e316158fcef0e0bc48ad1c04a5440.exe"

Signatures

LimeRAT

rat limerat

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A

Drops startup file

Description Indicator Process Target
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\BcastDVRBroker.url C:\Users\Admin\AppData\Local\Temp\2ba261eaeefcfbd8a6ee73e31c640ccff59e316158fcef0e0bc48ad1c04a5440.exe N/A

Legitimate hosting services abused for malware hosting/C2

Maps connected drives based on registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0 C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A

AutoIT Executable

Description Indicator Process Target
N/A N/A N/A N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2024 set thread context of 1268 N/A C:\Users\Admin\AppData\Local\Temp\2ba261eaeefcfbd8a6ee73e31c640ccff59e316158fcef0e0bc48ad1c04a5440.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe

Modifies system certificate store

evasion spyware trojan
Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474 C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A
Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474\Blob = 040000000100000010000000acb694a59c17e0d791529bb19706a6e40f0000000100000014000000ce0e658aa3e847e467a147b3049191093d055e6f0b0000000100000034000000420061006c00740069006d006f007200650020004300790062006500720054007200750073007400200052006f006f007400000053000000010000002400000030223020060a2b06010401b13e01640130123010060a2b0601040182373c0101030200c0140000000100000014000000e59d5930824758ccacfa085436867b3ab5044df01d0000000100000010000000918ad43a9475f78bb5243de886d8103c09000000010000000c000000300a06082b06010505070301030000000100000014000000d4de20d05e66fc53fe1a50882c78db2852cae47419000000010000001000000068cb42b035ea773e52ef50ecf50ec52920000000010000007b030000308203773082025fa0030201020204020000b9300d06092a864886f70d0101050500305a310b300906035504061302494531123010060355040a130942616c74696d6f726531133011060355040b130a43796265725472757374312230200603550403131942616c74696d6f7265204379626572547275737420526f6f74301e170d3030303531323138343630305a170d3235303531323233353930305a305a310b300906035504061302494531123010060355040a130942616c74696d6f726531133011060355040b130a43796265725472757374312230200603550403131942616c74696d6f7265204379626572547275737420526f6f7430820122300d06092a864886f70d01010105000382010f003082010a0282010100a304bb22ab983d57e826729ab579d429e2e1e89580b1b0e35b8e2b299a64dfa15dedb009056ddb282ece62a262feb488da12eb38eb219dc0412b01527b8877d31c8fc7bab988b56a09e773e81140a7d1ccca628d2de58f0ba650d2a850c328eaf5ab25878a9a961ca967b83f0cd5f7f952132fc21bd57070f08fc012ca06cb9ae1d9ca337a77d6f8ecb9f16844424813d2c0c2a4ae5e60feb6a605fcb4dd075902d459189863f5a563e0900c7d5db2067af385eaebd403ae5e843e5fff15ed69bcf939367275cf77524df3c9902cb93de5c923533f1f2498215c079929bdc63aece76e863a6b97746333bd681831f0788d76bffc9e8e5d2a86a74d90dc271a390203010001a3453043301d0603551d0e04160414e59d5930824758ccacfa085436867b3ab5044df030120603551d130101ff040830060101ff020103300e0603551d0f0101ff040403020106300d06092a864886f70d01010505000382010100850c5d8ee46f51684205a0ddbb4f27258403bdf764fd2dd730e3a41017ebda2929b6793f76f6191323b8100af958a4d46170bd04616a128a17d50abdc5bc307cd6e90c258d86404feccca37e38c637114feddd68318e4cd2b30174eebe755e07481a7f70ff165c84c07985b805fd7fbe6511a30fc002b4f852373904d5a9317a18bfa02af41299f7a34582e33c5ef59d9eb5c89e7c2ec8a49e4e08144b6dfd706d6b1a63bd64e61fb7cef0f29f2ebb1bb7f250887392c2e2e3168d9a3202ab8e18dde91011ee7e35ab90af3e30947ad0333da7650ff5fc8e9e62cf47442c015dbb1db532d247d2382ed0fe81dc326a1eb5ee3cd5fce7811d19c32442ea6339a9 C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2024 wrote to memory of 1268 N/A C:\Users\Admin\AppData\Local\Temp\2ba261eaeefcfbd8a6ee73e31c640ccff59e316158fcef0e0bc48ad1c04a5440.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2024 wrote to memory of 1268 N/A C:\Users\Admin\AppData\Local\Temp\2ba261eaeefcfbd8a6ee73e31c640ccff59e316158fcef0e0bc48ad1c04a5440.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2024 wrote to memory of 1268 N/A C:\Users\Admin\AppData\Local\Temp\2ba261eaeefcfbd8a6ee73e31c640ccff59e316158fcef0e0bc48ad1c04a5440.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2024 wrote to memory of 1268 N/A C:\Users\Admin\AppData\Local\Temp\2ba261eaeefcfbd8a6ee73e31c640ccff59e316158fcef0e0bc48ad1c04a5440.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2024 wrote to memory of 1268 N/A C:\Users\Admin\AppData\Local\Temp\2ba261eaeefcfbd8a6ee73e31c640ccff59e316158fcef0e0bc48ad1c04a5440.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2024 wrote to memory of 1268 N/A C:\Users\Admin\AppData\Local\Temp\2ba261eaeefcfbd8a6ee73e31c640ccff59e316158fcef0e0bc48ad1c04a5440.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2024 wrote to memory of 1268 N/A C:\Users\Admin\AppData\Local\Temp\2ba261eaeefcfbd8a6ee73e31c640ccff59e316158fcef0e0bc48ad1c04a5440.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2024 wrote to memory of 1268 N/A C:\Users\Admin\AppData\Local\Temp\2ba261eaeefcfbd8a6ee73e31c640ccff59e316158fcef0e0bc48ad1c04a5440.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2024 wrote to memory of 1268 N/A C:\Users\Admin\AppData\Local\Temp\2ba261eaeefcfbd8a6ee73e31c640ccff59e316158fcef0e0bc48ad1c04a5440.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe

Processes

C:\Users\Admin\AppData\Local\Temp\2ba261eaeefcfbd8a6ee73e31c640ccff59e316158fcef0e0bc48ad1c04a5440.exe

"C:\Users\Admin\AppData\Local\Temp\2ba261eaeefcfbd8a6ee73e31c640ccff59e316158fcef0e0bc48ad1c04a5440.exe"

C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe

"C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 pastebin.com udp
US 172.67.34.170:443 pastebin.com tcp

Files

memory/2024-54-0x0000000075B71000-0x0000000075B73000-memory.dmp

memory/1268-61-0x000000000009825E-mapping.dmp

memory/1268-57-0x0000000000090000-0x000000000009C000-memory.dmp

memory/1268-55-0x0000000000090000-0x000000000009C000-memory.dmp

memory/1268-62-0x0000000000090000-0x000000000009C000-memory.dmp

memory/2024-63-0x0000000000CF0000-0x0000000000E77000-memory.dmp

memory/1268-64-0x0000000000090000-0x000000000009C000-memory.dmp

memory/1268-66-0x0000000074470000-0x0000000074A1B000-memory.dmp

memory/1268-67-0x0000000074470000-0x0000000074A1B000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-06-15 01:29

Reported

2022-06-15 04:16

Platform

win10v2004-20220414-en

Max time kernel

148s

Max time network

175s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2ba261eaeefcfbd8a6ee73e31c640ccff59e316158fcef0e0bc48ad1c04a5440.exe"

Signatures

LimeRAT

rat limerat

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Drops startup file

Description Indicator Process Target
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\BcastDVRBroker.url C:\Users\Admin\AppData\Local\Temp\2ba261eaeefcfbd8a6ee73e31c640ccff59e316158fcef0e0bc48ad1c04a5440.exe N/A

Legitimate hosting services abused for malware hosting/C2

Maps connected drives based on registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0 C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A

AutoIT Executable

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4460 set thread context of 3328 N/A C:\Users\Admin\AppData\Local\Temp\2ba261eaeefcfbd8a6ee73e31c640ccff59e316158fcef0e0bc48ad1c04a5440.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2ba261eaeefcfbd8a6ee73e31c640ccff59e316158fcef0e0bc48ad1c04a5440.exe

"C:\Users\Admin\AppData\Local\Temp\2ba261eaeefcfbd8a6ee73e31c640ccff59e316158fcef0e0bc48ad1c04a5440.exe"

C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe

"C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"

Network

Country Destination Domain Proto
US 204.79.197.200:443 tcp
US 204.79.197.200:443 tcp
US 204.79.197.200:443 www.bing.com tcp
US 204.79.197.200:443 tcp
US 204.79.197.200:443 www.bing.com tcp
US 52.168.117.170:443 tcp
US 8.8.8.8:53 106.89.54.20.in-addr.arpa udp
US 8.8.8.8:53 pastebin.com udp
US 104.20.67.143:443 pastebin.com tcp
US 8.8.8.8:53 0.e.0.0.0.0.0.0.0.0.0.0.0.0.0.0.3.0.0.0.4.0.c.0.0.3.0.1.3.0.6.2.ip6.arpa udp
US 8.247.48.126:80 tcp

Files

memory/4460-130-0x0000000000270000-0x00000000003F7000-memory.dmp

memory/3328-131-0x0000000000000000-mapping.dmp

memory/3328-132-0x0000000000400000-0x000000000040C000-memory.dmp

memory/4460-136-0x0000000000270000-0x00000000003F7000-memory.dmp

memory/3328-137-0x0000000074E50000-0x0000000075401000-memory.dmp

memory/3328-138-0x0000000074E50000-0x0000000075401000-memory.dmp