quasar | 4cdeb2eae1cec1ab07077142313c524e9cf360cdec63497538c4405c2d8ded62

Analysis

max time kernel
105s
max time network
19s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
09-02-2025 06:00

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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
behavioral1/memory/1740-1-0x0000000000370000-0x00000000004A8000-memory.dmp	family_quasar
behavioral1/memory/1740-2-0x00000000004B0000-0x00000000004C6000-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 2 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Internet Explorer\Toolbar	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Internet Explorer\Toolbar\Locked = "1"	explorer.exe

Modifies registry class 37 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\MRUListEx = 00000000ffffffff	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\0\MRUListEx = 00000000ffffffff	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\KnownFolderDerivedFolderType = "{57807898-8C4F-4462-BB63-71042380B109}"	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_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-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0 = 74003100000000004a5925451100557365727300600008000400efbeee3a851a4a5925452a000000e601000000000100000000000000000036000000000055007300650072007300000040007300680065006c006c00330032002e0064006c006c002c002d0032003100380031003300000014000000	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\MRUListEx = 00000000ffffffff	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0 = 52003100000000004a592545122041707044617461003c0008000400efbe4a5925454a5925452a000000eb0100000000020000000000000000000000000000004100700070004400610074006100000016000000	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0 = 4c00310000000000495a253010204c6f63616c00380008000400efbe4a592545495a25302a000000fe0100000000020000000000000000000000000000004c006f00630061006c00000014000000	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\MRUListEx = 00000000ffffffff	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots = 02	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\0\0\NodeSlot = "1"	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\0\0 = 6200310000000000495a383010205155415341527e312e310000480008000400efbe495a2430495a38302a000000f06c01000000080000000000000000000000000000005100750061007300610072002000760031002e0034002e00310000001a000000	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\0\0	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = 00000000ffffffff	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0 = 19002f433a5c000000000000000000000000000000000000000000	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\MRUListEx = 00000000ffffffff	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_Classes\Local Settings	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0 = 14001f50e04fd020ea3a6910a2d808002b30309d0000	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0 = 4c003100000000004a59f34a100041646d696e00380008000400efbe4a5925454a59f34a2a00000030000000000004000000000000000000000000000000410064006d0069006e00000014000000	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\MRUListEx = 00000000ffffffff	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\MRUListEx = 00000000ffffffff	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\0 = 4a00310000000000495a2430102054656d700000360008000400efbe4a592545495a24302a000000ff010000000002000000000000000000000000000000540065006d007000000014000000	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\SniffedFolderType = "Generic"	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\0	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags\1	explorer.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1740	Quasar.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1740	Quasar.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1740	Quasar.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2876	explorer.exe
2876	explorer.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1740 wrote to memory of 2844	1740	Quasar.exe	31
PID 1740 wrote to memory of 2844	1740	Quasar.exe	31
PID 1740 wrote to memory of 2844	1740	Quasar.exe	31

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:1740
- C:\Windows\explorer.exe
  "C:\Windows\explorer.exe" /select, "C:\Users\Admin\AppData\Local\Temp\Quasar v1.4.1\quasar.p12"
  2⤵
  PID:2844

C:\Windows\explorer.exe
C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
1⤵
- Modifies Internet Explorer settings
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:2876

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

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Downloads

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

Filesize
4KB

MD5
fc4a6866cab456002643c829009c8c8f

SHA1
2a5d8d80db42a89de06288410370bff334d61d56

SHA256
e974ffcc9e31dbd477aaba4e735d6c5604ec4728e705c863c36bd902613e27f3

SHA512
29f32809575ccc402e05ee35f5c4f9843441ceb54e8e32bcf5ff930e8cdeca20b31a8c0c2157e261603e6b084c43bb3e3aef0831fd8053b8b82bb678c3d5cad5

Download Submit
memory/1740-6-0x000007FEF5A63000-0x000007FEF5A64000-memory.dmp

Filesize
4KB

Download
memory/1740-2-0x00000000004B0000-0x00000000004C6000-memory.dmp

Filesize
88KB

Download
memory/1740-3-0x000007FEF5A60000-0x000007FEF644C000-memory.dmp

Filesize
9.9MB

Download
memory/1740-4-0x000007FEF5A60000-0x000007FEF644C000-memory.dmp

Filesize
9.9MB

Download
memory/1740-5-0x000007FEF5A60000-0x000007FEF644C000-memory.dmp

Filesize
9.9MB

Download
memory/1740-0-0x000007FEF5A63000-0x000007FEF5A64000-memory.dmp

Filesize
4KB

Download
memory/1740-7-0x000007FEF5A60000-0x000007FEF644C000-memory.dmp

Filesize
9.9MB

Download
memory/1740-8-0x000000001EC40000-0x000000001EF6E000-memory.dmp

Filesize
3.2MB

Download
memory/1740-9-0x000007FEF5A60000-0x000007FEF644C000-memory.dmp

Filesize
9.9MB

Download
memory/1740-1-0x0000000000370000-0x00000000004A8000-memory.dmp

Filesize
1.2MB

Download
memory/1740-33-0x000000001C850000-0x000000001C868000-memory.dmp

Filesize
96KB

Download
memory/1740-35-0x000000001CAC0000-0x000000001CB0C000-memory.dmp

Filesize
304KB

Download
memory/2876-34-0x00000000039C0000-0x00000000039D0000-memory.dmp

Filesize
64KB

Download