quasar | 91d3d30addc138a7e5792098b38e0d0600e4e81044372306d857ae05002a1e48

General

Target

FpsBoosterUpdated.exe
Size

348KB
MD5

290b4ade8d6facb2bddad3eb853c1bcf
SHA1

f86966d34bc407090f418192ebbd1bc88346b98e
SHA256

91d3d30addc138a7e5792098b38e0d0600e4e81044372306d857ae05002a1e48
SHA512

5d0ebf9b4d9fb1c88dac4be649e2e0fc88972d89fe5c090e02b0fcf736d26b57371bc6702195c37d2711c661afb685cb4bbf87d2224c2ae333051d6acfa8286b
SSDEEP

6144:6vUhIvTCqLALgOnvbrXXmHbYNS2QabeCc2AW9E/rpW:INTCvn3X2yS25e72m/1W

Score

10^/10

quasar office04 discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office04

C2

127.0.0.1:4782

Mutex

QSR_MUTEX_n0f6at7YDD5llBKKrq

Attributes

encryption_key
MvuLVFJdoxRMzV0zCtOV
install_name
FpsBooster.exe
log_directory
Logs
reconnect_delay
3000
startup_key
FpsBooster
subdirectory
SubDir

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/4464-1-0x00000000006F0000-0x000000000074E000-memory.dmp	family_quasar
behavioral2/files/0x000d000000023b52-10.dat	family_quasar

Executes dropped EXE 1 IoCs

Processes:

FpsBooster.exe

pid	Process
3484	FpsBooster.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow	ioc
11	ip-api.com

Drops file in Program Files directory 3 IoCs

Processes:

FpsBoosterUpdated.exeFpsBooster.exe

description	ioc	Process
File created	C:\Program Files (x86)\SubDir\FpsBooster.exe	FpsBoosterUpdated.exe
File opened for modification	C:\Program Files (x86)\SubDir\FpsBooster.exe	FpsBoosterUpdated.exe
File opened for modification	C:\Program Files (x86)\SubDir	FpsBooster.exe

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

FpsBoosterUpdated.exeschtasks.exeFpsBooster.exeschtasks.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	FpsBoosterUpdated.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	FpsBooster.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.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
836	schtasks.exe
2864	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

FpsBoosterUpdated.exeFpsBooster.exe

description	pid	Process
Token: SeDebugPrivilege	4464	FpsBoosterUpdated.exe
Token: SeDebugPrivilege	3484	FpsBooster.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

FpsBoosterUpdated.exeFpsBooster.exe

description	pid	Process	procid_target
PID 4464 wrote to memory of 836	4464	FpsBoosterUpdated.exe	88
PID 4464 wrote to memory of 836	4464	FpsBoosterUpdated.exe	88
PID 4464 wrote to memory of 836	4464	FpsBoosterUpdated.exe	88
PID 4464 wrote to memory of 3484	4464	FpsBoosterUpdated.exe	90
PID 4464 wrote to memory of 3484	4464	FpsBoosterUpdated.exe	90
PID 4464 wrote to memory of 3484	4464	FpsBoosterUpdated.exe	90
PID 3484 wrote to memory of 2864	3484	FpsBooster.exe	91
PID 3484 wrote to memory of 2864	3484	FpsBooster.exe	91
PID 3484 wrote to memory of 2864	3484	FpsBooster.exe	91

C:\Users\Admin\AppData\Local\Temp\FpsBoosterUpdated.exe
"C:\Users\Admin\AppData\Local\Temp\FpsBoosterUpdated.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4464
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "FpsBooster" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\FpsBoosterUpdated.exe" /rl HIGHEST /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:836
- C:\Program Files (x86)\SubDir\FpsBooster.exe
  "C:\Program Files (x86)\SubDir\FpsBooster.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3484
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "FpsBooster" /sc ONLOGON /tr "C:\Program Files (x86)\SubDir\FpsBooster.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2864

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files (x86)\SubDir\FpsBooster.exe

Filesize
348KB

MD5
290b4ade8d6facb2bddad3eb853c1bcf

SHA1
f86966d34bc407090f418192ebbd1bc88346b98e

SHA256
91d3d30addc138a7e5792098b38e0d0600e4e81044372306d857ae05002a1e48

SHA512
5d0ebf9b4d9fb1c88dac4be649e2e0fc88972d89fe5c090e02b0fcf736d26b57371bc6702195c37d2711c661afb685cb4bbf87d2224c2ae333051d6acfa8286b

Download Submit
memory/3484-17-0x00000000746A0000-0x0000000074E50000-memory.dmp

Filesize
7.7MB

Download
memory/3484-16-0x0000000006B40000-0x0000000006B4A000-memory.dmp

Filesize
40KB

Download
memory/3484-15-0x00000000746A0000-0x0000000074E50000-memory.dmp

Filesize
7.7MB

Download
memory/3484-13-0x00000000746A0000-0x0000000074E50000-memory.dmp

Filesize
7.7MB

Download
memory/4464-3-0x00000000050B0000-0x0000000005142000-memory.dmp

Filesize
584KB

Download
memory/4464-6-0x0000000005630000-0x0000000005642000-memory.dmp

Filesize
72KB

Download
memory/4464-7-0x0000000006230000-0x000000000626C000-memory.dmp

Filesize
240KB

Download
memory/4464-5-0x0000000005030000-0x0000000005096000-memory.dmp

Filesize
408KB

Download
memory/4464-4-0x00000000746A0000-0x0000000074E50000-memory.dmp

Filesize
7.7MB

Download
memory/4464-14-0x00000000746A0000-0x0000000074E50000-memory.dmp

Filesize
7.7MB

Download
memory/4464-0-0x00000000746AE000-0x00000000746AF000-memory.dmp

Filesize
4KB

Download
memory/4464-2-0x0000000005660000-0x0000000005C04000-memory.dmp

Filesize
5.6MB

Download
memory/4464-1-0x00000000006F0000-0x000000000074E000-memory.dmp

Filesize
376KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads