quasar | 85d92e5e062b2e847e0334ed5afef5e7ff708e87ba6f25e31be00a0570827b98

General

Target

solara.exe
Size

3.1MB
MD5

9c9e1009cf33ab0f1652ccd8a5f845c1
SHA1

42d9282a9443175c4f64a7fce83fb39878aa6600
SHA256

85d92e5e062b2e847e0334ed5afef5e7ff708e87ba6f25e31be00a0570827b98
SHA512

89f3bd5700024260e82369e97c43a6a82a10bc5a7330f0b73dd3c53037e4aa8f9e535727feb58df2e8c54ec48ac9a397dadc49cf1f7cfeaffa00134714e80118
SSDEEP

49152:SvtI22SsaNYfdPBldt698dBcjHDPRJ6/bR3LoGdSTHHB72eh2NT:Svm22SsaNYfdPBldt6+dBcjHDPRJ6R

Score

10^/10

quasar consis spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

consis

C2

192.168.0.75:4783

Mutex

7c58e842-ae6e-4f79-bca8-c40fc05002b5

Attributes

encryption_key
3F4E1662FE86BE65EF2C4E1F0FEFAABC94765DDB
install_name
Sub-1.exe
log_directory
Logs
reconnect_delay
1500
startup_key
Quasar Client Startup
subdirectory
Windows

Signatures

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

Quasar payload 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/840-1-0x0000000000CB0000-0x0000000000FD4000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\Windows\Sub-1.exe	family_quasar
behavioral1/memory/2196-8-0x0000000001000000-0x0000000001324000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Sub-1.exe

pid process

2196 Sub-1.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exeschtasks.exe

pid process

1692 schtasks.exe
2516 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

solara.exeSub-1.exe

description pid process

Token: SeDebugPrivilege 840 solara.exe
Token: SeDebugPrivilege 2196 Sub-1.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Sub-1.exe

pid process

2196 Sub-1.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

Sub-1.exe

pid process

2196 Sub-1.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Sub-1.exe

pid process

2196 Sub-1.exe

pid	process
2196	Sub-1.exe

pid	process
1692	schtasks.exe
2516	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	840	solara.exe
Token: SeDebugPrivilege	2196	Sub-1.exe

pid	process
2196	Sub-1.exe

pid	process
2196	Sub-1.exe

pid	process
2196	Sub-1.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

solara.exeSub-1.exe

description	pid	process	target process
PID 840 wrote to memory of 1692	840	solara.exe	schtasks.exe
PID 840 wrote to memory of 1692	840	solara.exe	schtasks.exe
PID 840 wrote to memory of 1692	840	solara.exe	schtasks.exe
PID 840 wrote to memory of 2196	840	solara.exe	Sub-1.exe
PID 840 wrote to memory of 2196	840	solara.exe	Sub-1.exe
PID 840 wrote to memory of 2196	840	solara.exe	Sub-1.exe
PID 2196 wrote to memory of 2516	2196	Sub-1.exe	schtasks.exe
PID 2196 wrote to memory of 2516	2196	Sub-1.exe	schtasks.exe
PID 2196 wrote to memory of 2516	2196	Sub-1.exe	schtasks.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\solara.exe
"C:\Users\Admin\AppData\Local\Temp\solara.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:840

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\Sub-1.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:1692

C:\Users\Admin\AppData\Roaming\Windows\Sub-1.exe
"C:\Users\Admin\AppData\Roaming\Windows\Sub-1.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2196

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\Sub-1.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:2516

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Query Registry

1

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Roaming\Windows\Sub-1.exe
Filesize
3.1MB

MD5
9c9e1009cf33ab0f1652ccd8a5f845c1

SHA1
42d9282a9443175c4f64a7fce83fb39878aa6600

SHA256
85d92e5e062b2e847e0334ed5afef5e7ff708e87ba6f25e31be00a0570827b98

SHA512
89f3bd5700024260e82369e97c43a6a82a10bc5a7330f0b73dd3c53037e4aa8f9e535727feb58df2e8c54ec48ac9a397dadc49cf1f7cfeaffa00134714e80118

Download Submit
memory/840-0-0x000007FEF5893000-0x000007FEF5894000-memory.dmp

Filesize
4KB

Download
memory/840-1-0x0000000000CB0000-0x0000000000FD4000-memory.dmp

Filesize
3.1MB

Download
memory/840-2-0x000007FEF5890000-0x000007FEF627C000-memory.dmp

Filesize
9.9MB

Download
memory/840-11-0x000007FEF5890000-0x000007FEF627C000-memory.dmp

Filesize
9.9MB

Download
memory/2196-8-0x0000000001000000-0x0000000001324000-memory.dmp

Filesize
3.1MB

Download
memory/2196-9-0x000007FEF5890000-0x000007FEF627C000-memory.dmp

Filesize
9.9MB

Download
memory/2196-10-0x000007FEF5890000-0x000007FEF627C000-memory.dmp

Filesize
9.9MB

Download
memory/2196-12-0x000007FEF5890000-0x000007FEF627C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads