quasar | 4cdeb2eae1cec1ab07077142313c524e9cf360cdec63497538c4405c2d8ded62

Analysis

max time kernel
123s
max time network
94s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
22-01-2025 12:33

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Quasar v1.4.1/Quasar.exe
Size

1.2MB
MD5

12ebf922aa80d13f8887e4c8c5e7be83
SHA1

7f87a80513e13efd45175e8f2511c2cd17ff51e8
SHA256

43315abb9c8be9a39782bd8694a7ea9f16a867500dc804454d04b8bf2c15c51e
SHA512

fda5071e15cf077d202b08db741bbfb3dbd815acc41deec7b7d44e055cac408e2f2de7233f8f9c5c618afd00ffc2fc4c6e8352cbdf18f9aab55d980dcb58a275
SSDEEP

12288:IwPs012cBBBYiL9l/bFfpBBBBBBBBBBBBcA:jBBBYiLvzFfpBBBBBBBBBBBBcA

Score

10^/10

quasar spyware trojan

Malware Config

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 2 IoCs

resource	yara_rule
behavioral10/memory/2488-1-0x000001F1B4D30000-0x000001F1B4E68000-memory.dmp	family_quasar
behavioral10/memory/2488-2-0x000001F1B52F0000-0x000001F1B5306000-memory.dmp	family_quasar

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 4 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000\Software\Microsoft\Internet Explorer\Toolbar\Locked = "1"	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000\Software\Microsoft\Internet Explorer\Toolbar\ShellBrowser	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000\Software\Microsoft\Internet Explorer\Toolbar\ShellBrowser\ITBar7Layout = 13000000000000000000000020000000100000000000000001000000010700005e01000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000\Software\Microsoft\Internet Explorer\Toolbar	explorer.exe

Modifies registry class 58 IoCs

description	ioc	Process
Set value (data)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\MRUListEx = 00000000ffffffff	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\SniffedFolderType = "Generic"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\AllFolders\Shell\WFlags = "0"	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots = 02	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\0\MRUListEx = 00000000ffffffff	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\AllFolders\Shell	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\{5C4F28B5-F869-4E84-8E60-F11DB97C5CC7}\GroupByDirection = "1"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\AllFolders\Shell\HotKey = "0"	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\MRUListEx = 00000000ffffffff	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\0 = 4e00310000000000365a3964100054656d7000003a0009000400efbe4759d35e365a39642e0000004c570200000001000000000000000000000000000000cc729200540065006d007000000014000000	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\0	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\MRUListEx = 00000000ffffffff	explorer.exe
Key created	\Registry\User\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\NotificationData	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\{5C4F28B5-F869-4E84-8E60-F11DB97C5CC7}	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\{5C4F28B5-F869-4E84-8E60-F11DB97C5CC7}\Rev = "0"	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\{5C4F28B5-F869-4E84-8E60-F11DB97C5CC7}\Vid = "{137E7700-3573-11CF-AE69-08002B2E1262}"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\{5C4F28B5-F869-4E84-8E60-F11DB97C5CC7}\FFlags = "1092616209"	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0 = 56003100000000004759d35e12004170704461746100400009000400efbe4759d35e365a39642e0000003757020000000100000000000000000000000000000027adfb004100700070004400610074006100000016000000	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0 = 19002f433a5c000000000000000000000000000000000000000000	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\MRUListEx = 00000000ffffffff	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\MRUListEx = 00000000ffffffff	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\0\0\NodeSlot = "1"	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance\	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\AllFolders\Shell\ShowCmd = "1"	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\{5C4F28B5-F869-4E84-8E60-F11DB97C5CC7}\GroupByKey:PID = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\{5C4F28B5-F869-4E84-8E60-F11DB97C5CC7}\LogicalViewMode = "1"	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\0\0\MRUListEx = ffffffff	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\0\0 = 6600310000000000365a5a6410005155415341527e312e3100004c0009000400efbe365a3964365a5a642e00000006ab020000001a000000000000000000000000000000611f41005100750061007300610072002000760031002e0034002e00310000001a000000	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\0\0	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0 = 78003100000000004759d35e1100557365727300640009000400efbec5522d60365a39642e0000006c0500000000010000000000000000003a00000000004d98070155007300650072007300000040007300680065006c006c00330032002e0064006c006c002c002d0032003100380031003300000014000000	explorer.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance\	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\AllFolders	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\{5C4F28B5-F869-4E84-8E60-F11DB97C5CC7}\GroupView = "0"	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0 = 14001f50e04fd020ea3a6910a2d808002b30309d0000	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0 = 50003100000000004759c865100041646d696e003c0009000400efbe4759d35e365a39642e0000002c570200000001000000000000000000000000000000748daf00410064006d0069006e00000014000000	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\MRUListEx = 00000000ffffffff	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\{5C4F28B5-F869-4E84-8E60-F11DB97C5CC7}\Mode = "4"	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\{5C4F28B5-F869-4E84-8E60-F11DB97C5CC7}\Sort = 000000000000000000000000000000000100000030f125b7ef471a10a5f102608c9eebac0a00000001000000	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = 00000000ffffffff	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\{5C4F28B5-F869-4E84-8E60-F11DB97C5CC7}\FFlags = "1092616193"	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\{5C4F28B5-F869-4E84-8E60-F11DB97C5CC7}\ColInfo = 00000000000000000000000000000000fddfdffd100000000000000000000000040000001800000030f125b7ef471a10a5f102608c9eebac0a0000001001000030f125b7ef471a10a5f102608c9eebac0e0000009000000030f125b7ef471a10a5f102608c9eebac040000007800000030f125b7ef471a10a5f102608c9eebac0c00000050000000	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\{5C4F28B5-F869-4E84-8E60-F11DB97C5CC7}\IconSize = "16"	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0 = 50003100000000004759076110004c6f63616c003c0009000400efbe4759d35e365a39642e0000004b5702000000010000000000000000000000000000001cf3db004c006f00630061006c00000014000000	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\{5C4F28B5-F869-4E84-8E60-F11DB97C5CC7}\GroupByKey:FMTID = "{00000000-0000-0000-0000-000000000000}"	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	explorer.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2064	explorer.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2488	Quasar.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
2488	Quasar.exe
2488	Quasar.exe

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
2488	Quasar.exe
2488	Quasar.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2064	explorer.exe
2064	explorer.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2488 wrote to memory of 2696	2488	Quasar.exe	78
PID 2488 wrote to memory of 2696	2488	Quasar.exe	78

C:\Users\Admin\AppData\Local\Temp\Quasar v1.4.1\Quasar.exe
"C:\Users\Admin\AppData\Local\Temp\Quasar v1.4.1\Quasar.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2488
- C:\Windows\explorer.exe
  "C:\Windows\explorer.exe" /select, "C:\Users\Admin\AppData\Local\Temp\Quasar v1.4.1\quasar.p12"
  2⤵
  PID:2696

C:\Windows\explorer.exe
C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
1⤵
- Modifies Internet Explorer settings
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:2064

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:1588

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\Quasar v1.4.1\quasar.p12

Filesize
4KB

MD5
4be2401dc59f5c710fee3a1b0c56d569

SHA1
746a9261922dbaa4fa1e08b71c3bd75eeb70384a

SHA256
ce14204107a067232c2ccbe963318e989d59fccf15f32fa4d93b03455c6f9a3b

SHA512
db05bca6e7387c3d2dc79cbbf685ba316c9d869ba80250dc3f031252b1696711792fa009d0f125f5c2f613c0134a15b4108c18417dd14b33ea099d7c613eee8e

Download Submit
memory/2488-8-0x000001F1D1D70000-0x000001F1D209E000-memory.dmp

Filesize
3.2MB

Download
memory/2488-7-0x00007FFE9D990000-0x00007FFE9E452000-memory.dmp

Filesize
10.8MB

Download
memory/2488-3-0x00007FFE9D990000-0x00007FFE9E452000-memory.dmp

Filesize
10.8MB

Download
memory/2488-4-0x00007FFE9D990000-0x00007FFE9E452000-memory.dmp

Filesize
10.8MB

Download
memory/2488-14-0x00007FFE9D990000-0x00007FFE9E452000-memory.dmp

Filesize
10.8MB

Download
memory/2488-6-0x00007FFE9D993000-0x00007FFE9D995000-memory.dmp

Filesize
8KB

Download
memory/2488-2-0x000001F1B52F0000-0x000001F1B5306000-memory.dmp

Filesize
88KB

Download
memory/2488-0-0x00007FFE9D993000-0x00007FFE9D995000-memory.dmp

Filesize
8KB

Download
memory/2488-5-0x00007FFE9D990000-0x00007FFE9E452000-memory.dmp

Filesize
10.8MB

Download
memory/2488-1-0x000001F1B4D30000-0x000001F1B4E68000-memory.dmp

Filesize
1.2MB

Download
memory/2488-29-0x000001F1D1980000-0x000001F1D1998000-memory.dmp

Filesize
96KB

Download
memory/2488-30-0x000001F1D3650000-0x000001F1D36A0000-memory.dmp

Filesize
320KB

Download
memory/2488-31-0x000001F1D3760000-0x000001F1D3812000-memory.dmp

Filesize
712KB

Download
memory/2488-32-0x000001F1D36A0000-0x000001F1D36EC000-memory.dmp

Filesize
304KB

Download
memory/2488-33-0x00007FFE9D990000-0x00007FFE9E452000-memory.dmp

Filesize
10.8MB

Download
memory/2488-37-0x00007FFE9D990000-0x00007FFE9E452000-memory.dmp

Filesize
10.8MB

Download