quasar | 32482459ae887086ef09bc2d59ab47dab620cb4fc3912c8e9433c1ff0b803600

Analysis

max time kernel
134s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
02-07-2024 01:54

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General

Target

Client-built.exe
Size

3.1MB
MD5

589c24761ab9fa34227a089bb143f0d9
SHA1

04494373772d7317ec0e3478d8a46d02295674c1
SHA256

32482459ae887086ef09bc2d59ab47dab620cb4fc3912c8e9433c1ff0b803600
SHA512

b87e1c2f0aad4baadcc8028a246607cc0bf2504548367a47c080ea59f361928cf5e887319c21191fdec3720681bf06cb2e8926ebeb9afb5d733b9d0daa1c1bcf
SSDEEP

49152:PvOI22SsaNYfdPBldt698dBcjHBCi1JmLoGdNtTHHB72eh2NT:Pvj22SsaNYfdPBldt6+dBcjHBCR

Score

10^/10

quasar solara spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Solara

192.168.0.23:4782

Mutex

39c5c45c-62a0-4623-a904-5cbad2aa6b55

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 2 IoCs

Processes:

resource yara_rule

behavioral2/memory/4932-1-0x0000000000D00000-0x0000000001024000-memory.dmp family_quasar
C:\Windows\system32\SubDir\securekerneI.exe family_quasar
Executes dropped EXE 1 IoCs

Processes:

securekerneI.exe

pid process

2740 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

4364 schtasks.exe
3868 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Client-built.exesecurekerneI.exe

description pid process

Token: SeDebugPrivilege 4932 Client-built.exe
Token: SeDebugPrivilege 2740 securekerneI.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

securekerneI.exe

pid process

2740 securekerneI.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

securekerneI.exe

pid process

2740 securekerneI.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

securekerneI.exe

pid process

2740 securekerneI.exe

resource	yara_rule
behavioral2/memory/4932-1-0x0000000000D00000-0x0000000001024000-memory.dmp	family_quasar
C:\Windows\system32\SubDir\securekerneI.exe	family_quasar

pid	process
2740	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
4364	schtasks.exe
3868	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	4932	Client-built.exe
Token: SeDebugPrivilege	2740	securekerneI.exe

pid	process
2740	securekerneI.exe

pid	process
2740	securekerneI.exe

pid	process
2740	securekerneI.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Client-built.exesecurekerneI.exe

description	pid	process	target process
PID 4932 wrote to memory of 3868	4932	Client-built.exe	schtasks.exe
PID 4932 wrote to memory of 3868	4932	Client-built.exe	schtasks.exe
PID 4932 wrote to memory of 2740	4932	Client-built.exe	securekerneI.exe
PID 4932 wrote to memory of 2740	4932	Client-built.exe	securekerneI.exe
PID 2740 wrote to memory of 4364	2740	securekerneI.exe	schtasks.exe
PID 2740 wrote to memory of 4364	2740	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:4932

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:3868

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:2740

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:4364

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads

C:\Windows\system32\SubDir\securekerneI.exe
Filesize
3.1MB

MD5
589c24761ab9fa34227a089bb143f0d9

SHA1
04494373772d7317ec0e3478d8a46d02295674c1

SHA256
32482459ae887086ef09bc2d59ab47dab620cb4fc3912c8e9433c1ff0b803600

SHA512
b87e1c2f0aad4baadcc8028a246607cc0bf2504548367a47c080ea59f361928cf5e887319c21191fdec3720681bf06cb2e8926ebeb9afb5d733b9d0daa1c1bcf

Download Submit
memory/2740-8-0x00007FF95EB00000-0x00007FF95F5C1000-memory.dmp

Filesize
10.8MB

Download
memory/2740-10-0x00007FF95EB00000-0x00007FF95F5C1000-memory.dmp

Filesize
10.8MB

Download
memory/2740-11-0x000000001BC70000-0x000000001BCC0000-memory.dmp

Filesize
320KB

Download
memory/2740-12-0x000000001BD80000-0x000000001BE32000-memory.dmp

Filesize
712KB

Download
memory/2740-13-0x00007FF95EB00000-0x00007FF95F5C1000-memory.dmp

Filesize
10.8MB

Download
memory/4932-0-0x00007FF95EB03000-0x00007FF95EB05000-memory.dmp

Filesize
8KB

Download
memory/4932-1-0x0000000000D00000-0x0000000001024000-memory.dmp

Filesize
3.1MB

Download
memory/4932-2-0x00007FF95EB00000-0x00007FF95F5C1000-memory.dmp

Filesize
10.8MB

Download
memory/4932-9-0x00007FF95EB00000-0x00007FF95F5C1000-memory.dmp

Filesize
10.8MB

Download