quasar | 4cdeb2eae1cec1ab07077142313c524e9cf360cdec63497538c4405c2d8ded62

Analysis

max time kernel
82s
max time network
16s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
31/03/2024, 16:35

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General

Target
Quasar v1.4.1/Quasar.exe
Size 1.2MB
Sample240331-t3vapsfa2y
SHA256 43315abb9c8be9a39782bd8694a7ea9f16a867500dc804454d04b8bf2c15c51e
MD5 12ebf922aa80d13f8887e4c8c5e7be83
SHA1 7f87a80513e13efd45175e8f2511c2cd17ff51e8
SHA512 fda5071e15cf077d202b08db741bbfb3dbd815acc41deec7b7d44e055cac408e2f2de7233f8f9c5c618afd00ffc2fc4c6e8352cbdf18f9aab55d980dcb58a275
SSDEEP 12288:IwPs012cBBBYiL9l/bFfpBBBBBBBBBBBBcA:jBBBYiLvzFfpBBBBBBBBBBBBcA
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

quasar spyware trojan

Malware Config

Signatures

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

Quasar payload 3 IoCs

resource	yara_rule
behavioral19/memory/1460-0-0x0000000000830000-0x0000000000968000-memory.dmp	family_quasar
behavioral19/memory/1460-3-0x00000000001F0000-0x0000000000206000-memory.dmp	family_quasar
behavioral19/memory/1460-30-0x000000001A9C0000-0x000000001AA40000-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-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Internet Explorer\Toolbar	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Internet Explorer\Toolbar\Locked = "1"	explorer.exe

Modifies registry class 37 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\0\0	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags\1	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_Classes\Local Settings	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\MRUListEx = 00000000ffffffff	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0 = 52003100000000005558e86b122041707044617461003c0008000400efbe5558e86b5558e86b2a000000350000000000030000000000000000000000000000004100700070004400610074006100000016000000	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\0 = 4a003100000000007f588584102054656d700000360008000400efbe5558e86b7f5885842a000000f8010000000002000000000000000000000000000000540065006d007000000014000000	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0 = 14001f50e04fd020ea3a6910a2d808002b30309d0000	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0 = 74003100000000005558e86b1100557365727300600008000400efbeee3a851a5558e86b2a000000e601000000000100000000000000000036000000000055007300650072007300000040007300680065006c006c00330032002e0064006c006c002c002d0032003100380031003300000014000000	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_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-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = 00000000ffffffff	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\0	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots = 02	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\MRUListEx = 00000000ffffffff	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\MRUListEx = 00000000ffffffff	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\MRUListEx = 00000000ffffffff	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\MRUListEx = 00000000ffffffff	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_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-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0 = 4c0031000000000055584b6f100041646d696e00380008000400efbe5558e86b55584b6f2a00000028000000000004000000000000000000000000000000410064006d0069006e00000014000000	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\0\0 = 62003100000000007f588d8410205155415341527e312e310000480008000400efbe7f5885847f588d842a0000006b56010000000e0000000000000000000000000000005100750061007300610072002000760031002e0034002e00310000001a000000	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\KnownFolderDerivedFolderType = "{57807898-8C4F-4462-BB63-71042380B109}"	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0 = 4c003100000000007f58858410204c6f63616c00380008000400efbe5558e86b7f5885842a000000f70100000000020000000000000000000000000000004c006f00630061006c00000014000000	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\0\0\MRUListEx = ffffffff	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0 = 19002f433a5c000000000000000000000000000000000000000000	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\MRUListEx = 00000000ffffffff	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\SniffedFolderType = "Generic"	explorer.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2584	explorer.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1460	Quasar.exe
Token: SeDebugPrivilege	2876	Quasar.exe

Suspicious use of FindShellTrayWindow 5 IoCs

pid	Process
1460	Quasar.exe
1460	Quasar.exe
2876	Quasar.exe
2876	Quasar.exe
1460	Quasar.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
1460	Quasar.exe
2876	Quasar.exe
1460	Quasar.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1460 wrote to memory of 2640	1460	Quasar.exe	29
PID 1460 wrote to memory of 2640	1460	Quasar.exe	29
PID 1460 wrote to memory of 2640	1460	Quasar.exe	29
PID 2584 wrote to memory of 2876	2584	explorer.exe	33
PID 2584 wrote to memory of 2876	2584	explorer.exe	33
PID 2584 wrote to memory of 2876	2584	explorer.exe	33
PID 2876 wrote to memory of 2204	2876	Quasar.exe	36
PID 2876 wrote to memory of 2204	2876	Quasar.exe	36
PID 2876 wrote to memory of 2204	2876	Quasar.exe	36

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:1460
- C:\Windows\explorer.exe
  "C:\Windows\explorer.exe" /select, "C:\Users\Admin\AppData\Local\Temp\Quasar v1.4.1\quasar.p12"
  2⤵
  PID:2640

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: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2584
- C:\Users\Admin\AppData\Local\Temp\Quasar v1.4.1\Quasar.exe
  "C:\Users\Admin\AppData\Local\Temp\Quasar v1.4.1\Quasar.exe"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2876
- - C:\Windows\system32\WerFault.exe
    C:\Windows\system32\WerFault.exe -u -p 2876 -s 1100
    3⤵
    PID:2204

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

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Downloads

quasar.p12

Path C:\Users\Admin\AppData\Local\Temp\Quasar v1.4.1\quasar.p12
Size 4KB
SHA256 859f0d2e2e0faaefc6b6a68b232c5dcf723dcaf803defb8b47ef0a152d84baf9
MD5 6e95e3d70eafa414fac1a9ecd5d7faff
SHA1 b0d104374dc0cd3c5358e150013f1db99ee66446
SHA512 06b4a2ad673cb17d086e5c04f5e70960875eca11f6faef9275a7eb25fb5e0d7db3f79a3fd0c116832bb093e28a8371c5b9c956bfedda87ce877c74f0466b3da5
SSDEEP 96:D2qZgPoP2myrDYE0w+/Gk5Fej+ZYyi1PSvyo9b9blXcMrD9A:D2KgPoPn2DYHw++kayiPoB95XO
MD5 SHA1 SHA512 SSDEEP

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c81df71718aaf18a92f7fadedb211275_e3fd1d67-4513-4809-a7f1-bf54bd53bdbc

Path C:\Users\Admin\AppData\Roaming\Microsoft\Crypto\RSA\S-1-5-21-1298544033-3225604241-2703760938-1000\c81df71718aaf18a92f7fadedb211275_e3fd1d67-4513-4809-a7f1-bf54bd53bdbc
Size 3KB
SHA256 5ec11b782474f76d4d1f738eae2e167e33a1d4693b87ee53f01020a2bf086220
MD5 377654e0c785f3b545dce7b8a2231d04
SHA1 5936fc8650c6e21db25edebc0af9e36a9ce0920d
SHA512 3514c3f5ae2b937b2845b61cbcb66b3106f66b67bfbd39082d0509629418a14d9cfaa7a9560b5c4c3d482a0bef9f3fca26bd81706d72b26707c22c76ffc59218
MD5 SHA1 SHA512

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memory/1460-11-0x000007FEF5770000-0x000007FEF615C000-memory.dmp

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memory/1460-3-0x00000000001F0000-0x0000000000206000-memory.dmp

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memory/1460-4-0x000000001A9C0000-0x000000001AA40000-memory.dmp

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memory/1460-5-0x000000001F060000-0x000000001F38E000-memory.dmp

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memory/1460-2-0x000000001A9C0000-0x000000001AA40000-memory.dmp

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memory/1460-1-0x000007FEF5770000-0x000007FEF615C000-memory.dmp

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memory/1460-24-0x000000001BE60000-0x000000001BE78000-memory.dmp

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memory/1460-27-0x000000001A9C0000-0x000000001AA40000-memory.dmp

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memory/1460-26-0x000000001BF50000-0x000000001BF9C000-memory.dmp

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memory/1460-48-0x000007FEF5770000-0x000007FEF615C000-memory.dmp

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memory/1460-0-0x0000000000830000-0x0000000000968000-memory.dmp

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memory/1460-30-0x000000001A9C0000-0x000000001AA40000-memory.dmp

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memory/1460-31-0x000000001A9C0000-0x000000001AA40000-memory.dmp

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memory/2584-25-0x0000000003A90000-0x0000000003AA0000-memory.dmp

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memory/2584-32-0x0000000003A80000-0x0000000003A81000-memory.dmp

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memory/2584-28-0x0000000003A80000-0x0000000003A81000-memory.dmp

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memory/2876-36-0x000000001B630000-0x000000001B6B0000-memory.dmp

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memory/2876-35-0x000000001B630000-0x000000001B6B0000-memory.dmp

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memory/2876-34-0x000000001B630000-0x000000001B6B0000-memory.dmp

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memory/2876-33-0x000007FEF5770000-0x000007FEF615C000-memory.dmp

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memory/2876-41-0x000007FEF5770000-0x000007FEF615C000-memory.dmp

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memory/2876-42-0x000000001B630000-0x000000001B6B0000-memory.dmp

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memory/2876-43-0x000000001B630000-0x000000001B6B0000-memory.dmp

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memory/2876-44-0x000000001B630000-0x000000001B6B0000-memory.dmp

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memory/2876-45-0x000007FEF5770000-0x000007FEF615C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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