quasar | 9b0f3300c2d0ca21337b0825e47d6391c74d10f3e00ccae2b2bf57d3a066c91b

Analysis

max time kernel
117s
max time network
119s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
27-11-2024 04:07

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General

Target

9b0f3300c2d0ca21337b0825e47d6391c74d10f3e00ccae2b2bf57d3a066c91bN.exe
Size

3.1MB
MD5

2bb2268a2514ef3785639122f1155970
SHA1

a39fbba26221e9e7854de80b374ebfcb99ad9bf1
SHA256

9b0f3300c2d0ca21337b0825e47d6391c74d10f3e00ccae2b2bf57d3a066c91b
SHA512

7e5e8cdcaf1cd90d8fb2e3f242968f409daefac45b3428a8452d9c184238447477875770b598123bf3c00619faf31eb4581a6d8e023b11b6307c89f310ef661c
SSDEEP

49152:evkt62XlaSFNWPjljiFa2RoUYIjO/YBxjLoGdZTHHB72eh2NT:ev462XlaSFNWPjljiFXRoUYIS/M

Score

10^/10

quasar fontdrvhost spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

fontdrvhost

archerleet.duckdns.org:1862

Mutex

92d56566-deb6-4133-9031-d3e24abe97f9

Attributes

encryption_key
0971EF27DF92928DE49B97AC507E38E80FF68C6E
install_name
fontdrvhost.exe
log_directory
Logs
reconnect_delay
3000
startup_key
fontdrvhost
subdirectory
Driver

Signatures

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

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5012-1-0x0000000000F00000-0x0000000001224000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b73-6.dat	family_quasar

Executes dropped EXE 1 IoCs

Processes:

fontdrvhost.exe

pid	Process
1792	fontdrvhost.exe

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
4136	schtasks.exe
3540	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

9b0f3300c2d0ca21337b0825e47d6391c74d10f3e00ccae2b2bf57d3a066c91bN.exefontdrvhost.exe

description	pid	Process
Token: SeDebugPrivilege	5012	9b0f3300c2d0ca21337b0825e47d6391c74d10f3e00ccae2b2bf57d3a066c91bN.exe
Token: SeDebugPrivilege	1792	fontdrvhost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

fontdrvhost.exe

pid	Process
1792	fontdrvhost.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

9b0f3300c2d0ca21337b0825e47d6391c74d10f3e00ccae2b2bf57d3a066c91bN.exefontdrvhost.exe

description	pid	Process	procid_target
PID 5012 wrote to memory of 3540	5012	9b0f3300c2d0ca21337b0825e47d6391c74d10f3e00ccae2b2bf57d3a066c91bN.exe	83
PID 5012 wrote to memory of 3540	5012	9b0f3300c2d0ca21337b0825e47d6391c74d10f3e00ccae2b2bf57d3a066c91bN.exe	83
PID 5012 wrote to memory of 1792	5012	9b0f3300c2d0ca21337b0825e47d6391c74d10f3e00ccae2b2bf57d3a066c91bN.exe	85
PID 5012 wrote to memory of 1792	5012	9b0f3300c2d0ca21337b0825e47d6391c74d10f3e00ccae2b2bf57d3a066c91bN.exe	85
PID 1792 wrote to memory of 4136	1792	fontdrvhost.exe	88
PID 1792 wrote to memory of 4136	1792	fontdrvhost.exe	88

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\9b0f3300c2d0ca21337b0825e47d6391c74d10f3e00ccae2b2bf57d3a066c91bN.exe
"C:\Users\Admin\AppData\Local\Temp\9b0f3300c2d0ca21337b0825e47d6391c74d10f3e00ccae2b2bf57d3a066c91bN.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5012
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "fontdrvhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Driver\fontdrvhost.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3540
- C:\Users\Admin\AppData\Roaming\Driver\fontdrvhost.exe
  "C:\Users\Admin\AppData\Roaming\Driver\fontdrvhost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1792
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "fontdrvhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Driver\fontdrvhost.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4136

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Driver\fontdrvhost.exe

Filesize
3.1MB

MD5
2bb2268a2514ef3785639122f1155970

SHA1
a39fbba26221e9e7854de80b374ebfcb99ad9bf1

SHA256
9b0f3300c2d0ca21337b0825e47d6391c74d10f3e00ccae2b2bf57d3a066c91b

SHA512
7e5e8cdcaf1cd90d8fb2e3f242968f409daefac45b3428a8452d9c184238447477875770b598123bf3c00619faf31eb4581a6d8e023b11b6307c89f310ef661c

Download Submit
memory/1792-9-0x00007FFE304F0000-0x00007FFE30FB1000-memory.dmp

Filesize
10.8MB

Download
memory/1792-11-0x00007FFE304F0000-0x00007FFE30FB1000-memory.dmp

Filesize
10.8MB

Download
memory/1792-12-0x0000000003270000-0x00000000032C0000-memory.dmp

Filesize
320KB

Download
memory/1792-13-0x000000001C4E0000-0x000000001C592000-memory.dmp

Filesize
712KB

Download
memory/1792-14-0x00007FFE304F0000-0x00007FFE30FB1000-memory.dmp

Filesize
10.8MB

Download
memory/5012-0-0x00007FFE304F3000-0x00007FFE304F5000-memory.dmp

Filesize
8KB

Download
memory/5012-1-0x0000000000F00000-0x0000000001224000-memory.dmp

Filesize
3.1MB

Download
memory/5012-2-0x00007FFE304F0000-0x00007FFE30FB1000-memory.dmp

Filesize
10.8MB

Download
memory/5012-10-0x00007FFE304F0000-0x00007FFE30FB1000-memory.dmp

Filesize
10.8MB

Download