quasar | 015b46ff7f35bb33dbefa393382e6acbfb3a5a92d2efc31ad69dda3e41ff970d

Analysis

max time kernel
116s
max time network
120s
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 08:22

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General

Target

015b46ff7f35bb33dbefa393382e6acbfb3a5a92d2efc31ad69dda3e41ff970d.exe
Size

3.1MB
MD5

a07f035696ef9a0aab36822fe7af4092
SHA1

bf21e76cab91b1db6b90b41c31ecad4129085caa
SHA256

015b46ff7f35bb33dbefa393382e6acbfb3a5a92d2efc31ad69dda3e41ff970d
SHA512

cf684ce07b06f984bc3ecf6f48a5deca308e2b1621f2b72d12766096b69eaab483f8b2da7a48450c2864f90953207f5bea24c6e3e0b4b74d220028e877d553e3
SSDEEP

49152:evkt62XlaSFNWPjljiFa2RoUYIjO/YBxjLoGdZTHHB72eh2NTE:ev462XlaSFNWPjljiFXRoUYIS/Mj

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/3640-1-0x0000000000CF0000-0x0000000001014000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b79-6.dat	family_quasar

Executes dropped EXE 1 IoCs

Processes:

fontdrvhost.exe

pid	Process
4672	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
2388	schtasks.exe
4600	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

015b46ff7f35bb33dbefa393382e6acbfb3a5a92d2efc31ad69dda3e41ff970d.exefontdrvhost.exe

description	pid	Process
Token: SeDebugPrivilege	3640	015b46ff7f35bb33dbefa393382e6acbfb3a5a92d2efc31ad69dda3e41ff970d.exe
Token: SeDebugPrivilege	4672	fontdrvhost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

fontdrvhost.exe

pid	Process
4672	fontdrvhost.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

015b46ff7f35bb33dbefa393382e6acbfb3a5a92d2efc31ad69dda3e41ff970d.exefontdrvhost.exe

description	pid	Process	procid_target
PID 3640 wrote to memory of 2388	3640	015b46ff7f35bb33dbefa393382e6acbfb3a5a92d2efc31ad69dda3e41ff970d.exe	83
PID 3640 wrote to memory of 2388	3640	015b46ff7f35bb33dbefa393382e6acbfb3a5a92d2efc31ad69dda3e41ff970d.exe	83
PID 3640 wrote to memory of 4672	3640	015b46ff7f35bb33dbefa393382e6acbfb3a5a92d2efc31ad69dda3e41ff970d.exe	85
PID 3640 wrote to memory of 4672	3640	015b46ff7f35bb33dbefa393382e6acbfb3a5a92d2efc31ad69dda3e41ff970d.exe	85
PID 4672 wrote to memory of 4600	4672	fontdrvhost.exe	86
PID 4672 wrote to memory of 4600	4672	fontdrvhost.exe	86

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\015b46ff7f35bb33dbefa393382e6acbfb3a5a92d2efc31ad69dda3e41ff970d.exe
"C:\Users\Admin\AppData\Local\Temp\015b46ff7f35bb33dbefa393382e6acbfb3a5a92d2efc31ad69dda3e41ff970d.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3640
- 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:2388
- 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:4672
- - 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:4600

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
a07f035696ef9a0aab36822fe7af4092

SHA1
bf21e76cab91b1db6b90b41c31ecad4129085caa

SHA256
015b46ff7f35bb33dbefa393382e6acbfb3a5a92d2efc31ad69dda3e41ff970d

SHA512
cf684ce07b06f984bc3ecf6f48a5deca308e2b1621f2b72d12766096b69eaab483f8b2da7a48450c2864f90953207f5bea24c6e3e0b4b74d220028e877d553e3

Download Submit
memory/3640-0-0x00007FFED1093000-0x00007FFED1095000-memory.dmp

Filesize
8KB

Download
memory/3640-1-0x0000000000CF0000-0x0000000001014000-memory.dmp

Filesize
3.1MB

Download
memory/3640-2-0x00007FFED1090000-0x00007FFED1B51000-memory.dmp

Filesize
10.8MB

Download
memory/3640-10-0x00007FFED1090000-0x00007FFED1B51000-memory.dmp

Filesize
10.8MB

Download
memory/4672-9-0x00007FFED1090000-0x00007FFED1B51000-memory.dmp

Filesize
10.8MB

Download
memory/4672-11-0x00007FFED1090000-0x00007FFED1B51000-memory.dmp

Filesize
10.8MB

Download
memory/4672-12-0x0000000002CF0000-0x0000000002D40000-memory.dmp

Filesize
320KB

Download
memory/4672-13-0x000000001C010000-0x000000001C0C2000-memory.dmp

Filesize
712KB

Download
memory/4672-14-0x00007FFED1090000-0x00007FFED1B51000-memory.dmp

Filesize
10.8MB

Download