quasar | 015b46ff7f35bb33dbefa393382e6acbfb3a5a92d2efc31ad69dda3e41ff970d

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

C2

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 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2672-1-0x0000000000260000-0x0000000000584000-memory.dmp	family_quasar
behavioral1/files/0x003800000001506e-6.dat	family_quasar
behavioral1/memory/2736-9-0x0000000000040000-0x0000000000364000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

fontdrvhost.exe

pid	Process
2736	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
2804	schtasks.exe
2832	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

015b46ff7f35bb33dbefa393382e6acbfb3a5a92d2efc31ad69dda3e41ff970d.exefontdrvhost.exe

description	pid	Process
Token: SeDebugPrivilege	2672	015b46ff7f35bb33dbefa393382e6acbfb3a5a92d2efc31ad69dda3e41ff970d.exe
Token: SeDebugPrivilege	2736	fontdrvhost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

fontdrvhost.exe

pid	Process
2736	fontdrvhost.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

015b46ff7f35bb33dbefa393382e6acbfb3a5a92d2efc31ad69dda3e41ff970d.exefontdrvhost.exe

description	pid	Process	procid_target
PID 2672 wrote to memory of 2804	2672	015b46ff7f35bb33dbefa393382e6acbfb3a5a92d2efc31ad69dda3e41ff970d.exe	30
PID 2672 wrote to memory of 2804	2672	015b46ff7f35bb33dbefa393382e6acbfb3a5a92d2efc31ad69dda3e41ff970d.exe	30
PID 2672 wrote to memory of 2804	2672	015b46ff7f35bb33dbefa393382e6acbfb3a5a92d2efc31ad69dda3e41ff970d.exe	30
PID 2672 wrote to memory of 2736	2672	015b46ff7f35bb33dbefa393382e6acbfb3a5a92d2efc31ad69dda3e41ff970d.exe	32
PID 2672 wrote to memory of 2736	2672	015b46ff7f35bb33dbefa393382e6acbfb3a5a92d2efc31ad69dda3e41ff970d.exe	32
PID 2672 wrote to memory of 2736	2672	015b46ff7f35bb33dbefa393382e6acbfb3a5a92d2efc31ad69dda3e41ff970d.exe	32
PID 2736 wrote to memory of 2832	2736	fontdrvhost.exe	33
PID 2736 wrote to memory of 2832	2736	fontdrvhost.exe	33
PID 2736 wrote to memory of 2832	2736	fontdrvhost.exe	33

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:2672
- 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:2804
- 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:2736
- - 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:2832

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

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/2672-0-0x000007FEF59E3000-0x000007FEF59E4000-memory.dmp

Filesize
4KB

Download
memory/2672-1-0x0000000000260000-0x0000000000584000-memory.dmp

Filesize
3.1MB

Download
memory/2672-2-0x000007FEF59E0000-0x000007FEF63CC000-memory.dmp

Filesize
9.9MB

Download
memory/2672-10-0x000007FEF59E0000-0x000007FEF63CC000-memory.dmp

Filesize
9.9MB

Download
memory/2736-8-0x000007FEF59E0000-0x000007FEF63CC000-memory.dmp

Filesize
9.9MB

Download
memory/2736-9-0x0000000000040000-0x0000000000364000-memory.dmp

Filesize
3.1MB

Download
memory/2736-11-0x000007FEF59E0000-0x000007FEF63CC000-memory.dmp

Filesize
9.9MB

Download
memory/2736-12-0x000007FEF59E0000-0x000007FEF63CC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads