quasar | c66affad00d79ff0a9189ea5c9f389b064b17c1afccca2a6c7bd2bed30801d50

Analysis

max time kernel
150s
max time network
135s
platform
windows7_x64
resource
win7-20240611-en
resource tags

arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
submitted
02-07-2024 15:07

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General

Target

Client-built.exe
Size

3.1MB
MD5

2a5d0a7b5310648731b92060b723cfdf
SHA1

c020d8e9536c351d85e9b76d5232e5030c0fff6d
SHA256

c66affad00d79ff0a9189ea5c9f389b064b17c1afccca2a6c7bd2bed30801d50
SHA512

39cc62dd3bbc8ee15eb37107de972bad1bbc1dde953dcb734cf391020691e6121fc38b64207e18da9a6a01fed8ea0860b67273cb6f3f328d89396c4a192c3efb
SSDEEP

49152:GvOI22SsaNYfdPBldt698dBcjHDxDE/gTk/JxAoGdcTHHB72eh2NT:Gvj22SsaNYfdPBldt6+dBcjHDx0K

Score

10^/10

quasar solara spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Solara

192.168.0.23:4782

Mutex

1db1cfc2-0b96-4b9e-afd9-8208e6abd265

Attributes

encryption_key
41AD0502F025DD3F47720DC4BDEED540F3EAFD12
install_name
securekerneI.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Update
subdirectory
SubDir

Signatures

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

Quasar payload 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2564-1-0x0000000000350000-0x0000000000674000-memory.dmp	family_quasar
C:\Windows\System32\SubDir\securekerneI.exe	family_quasar
behavioral1/memory/1980-8-0x0000000000F60000-0x0000000001284000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

securekerneI.exe

pid process

1980 securekerneI.exe
Drops file in System32 directory 2 IoCs

Processes:

Client-built.exe

description ioc process

File created C:\Windows\system32\SubDir\securekerneI.exe Client-built.exe
File opened for modification C:\Windows\system32\SubDir\securekerneI.exe Client-built.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence execution

Scheduled Task
T1053.005

Processes:

schtasks.exeschtasks.exe

pid process

2136 schtasks.exe
2676 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Client-built.exesecurekerneI.exe

description pid process

Token: SeDebugPrivilege 2564 Client-built.exe
Token: SeDebugPrivilege 1980 securekerneI.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

securekerneI.exe

pid process

1980 securekerneI.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

securekerneI.exe

pid process

1980 securekerneI.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

securekerneI.exe

pid process

1980 securekerneI.exe

pid	process
1980	securekerneI.exe

description	ioc	process
File created	C:\Windows\system32\SubDir\securekerneI.exe	Client-built.exe
File opened for modification	C:\Windows\system32\SubDir\securekerneI.exe	Client-built.exe

pid	process
2136	schtasks.exe
2676	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	2564	Client-built.exe
Token: SeDebugPrivilege	1980	securekerneI.exe

pid	process
1980	securekerneI.exe

pid	process
1980	securekerneI.exe

pid	process
1980	securekerneI.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

Client-built.exesecurekerneI.exe

description	pid	process	target process
PID 2564 wrote to memory of 2136	2564	Client-built.exe	schtasks.exe
PID 2564 wrote to memory of 2136	2564	Client-built.exe	schtasks.exe
PID 2564 wrote to memory of 2136	2564	Client-built.exe	schtasks.exe
PID 2564 wrote to memory of 1980	2564	Client-built.exe	securekerneI.exe
PID 2564 wrote to memory of 1980	2564	Client-built.exe	securekerneI.exe
PID 2564 wrote to memory of 1980	2564	Client-built.exe	securekerneI.exe
PID 1980 wrote to memory of 2676	1980	securekerneI.exe	schtasks.exe
PID 1980 wrote to memory of 2676	1980	securekerneI.exe	schtasks.exe
PID 1980 wrote to memory of 2676	1980	securekerneI.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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2564

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Windows\system32\SubDir\securekerneI.exe" /rl HIGHEST /f
2⤵
- Scheduled Task/Job: Scheduled Task
PID:2136

C:\Windows\system32\SubDir\securekerneI.exe
"C:\Windows\system32\SubDir\securekerneI.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:1980

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Windows\system32\SubDir\securekerneI.exe" /rl HIGHEST /f
3⤵
- Scheduled Task/Job: Scheduled Task
PID:2676

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads

C:\Windows\System32\SubDir\securekerneI.exe
Filesize
3.1MB

MD5
2a5d0a7b5310648731b92060b723cfdf

SHA1
c020d8e9536c351d85e9b76d5232e5030c0fff6d

SHA256
c66affad00d79ff0a9189ea5c9f389b064b17c1afccca2a6c7bd2bed30801d50

SHA512
39cc62dd3bbc8ee15eb37107de972bad1bbc1dde953dcb734cf391020691e6121fc38b64207e18da9a6a01fed8ea0860b67273cb6f3f328d89396c4a192c3efb

Download Submit
memory/1980-7-0x000007FEF5250000-0x000007FEF5C3C000-memory.dmp

Filesize
9.9MB

Download
memory/1980-8-0x0000000000F60000-0x0000000001284000-memory.dmp

Filesize
3.1MB

Download
memory/1980-10-0x000007FEF5250000-0x000007FEF5C3C000-memory.dmp

Filesize
9.9MB

Download
memory/1980-11-0x000007FEF5250000-0x000007FEF5C3C000-memory.dmp

Filesize
9.9MB

Download
memory/2564-0-0x000007FEF5253000-0x000007FEF5254000-memory.dmp

Filesize
4KB

Download
memory/2564-1-0x0000000000350000-0x0000000000674000-memory.dmp

Filesize
3.1MB

Download
memory/2564-2-0x000007FEF5250000-0x000007FEF5C3C000-memory.dmp

Filesize
9.9MB

Download
memory/2564-9-0x000007FEF5250000-0x000007FEF5C3C000-memory.dmp

Filesize
9.9MB

Download