quasar | f34f7d8f9488ce6e2438c88f64d262b0529a25519c3ecb947fa28147a81507d8

General

Target

F34F7D8F9488CE6E2438C88F64D262B0529A25519C3EC.exe
Size

502KB
MD5

797722758bc54671176f4ae1894e403a
SHA1

5cac11545515f1452614297a41e18411f083eac6
SHA256

f34f7d8f9488ce6e2438c88f64d262b0529a25519c3ecb947fa28147a81507d8
SHA512

dac39d79388f8d39ebc894f10a33683daead08f658ab3eae9eb969dc21c3b469d05f078a9b36ae12aebb019cbe3f15e203fe6ee24a706ac62183b2b251ab1938
SSDEEP

12288:PTEgdfYvdo6ngiDp4kyw5mpG4W8UecdT:4UwVH/pyw5mpOEcdT

Score

10^/10

quasar ctfmon spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

ctfmon

C2

firewall.trustedvpnservices.com:39583

Mutex

3b144aca-60f9-4bcb-b4a6-716e4a5e2f1c

Attributes

encryption_key
3237D2016D901477C3F2D8FDF94D0482E3E52621
install_name
ctfmon.exe
log_directory
Logs
reconnect_delay
3000
startup_key
ctfmon
subdirectory
Microsoft\Windows\Start Menu\Programs\Startup

Signatures

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

Quasar payload 5 IoCs

resource	yara_rule
behavioral1/memory/1968-54-0x00000000009B0000-0x0000000000A34000-memory.dmp	family_quasar
behavioral1/memory/1968-55-0x000000001B0A0000-0x000000001B120000-memory.dmp	family_quasar
behavioral1/files/0x000b0000000122df-59.dat	family_quasar
behavioral1/files/0x000b0000000122df-58.dat	family_quasar
behavioral1/memory/1580-60-0x0000000000EA0000-0x0000000000F24000-memory.dmp	family_quasar

Drops startup file 3 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ctfmon.exe	F34F7D8F9488CE6E2438C88F64D262B0529A25519C3EC.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ctfmon.exe	F34F7D8F9488CE6E2438C88F64D262B0529A25519C3EC.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ctfmon.exe	ctfmon.exe

Executes dropped EXE 1 IoCs

pid	Process
1580	ctfmon.exe

Creates scheduled task(s) 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
900	schtasks.exe
460	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1968	F34F7D8F9488CE6E2438C88F64D262B0529A25519C3EC.exe
Token: SeDebugPrivilege	1580	ctfmon.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1580	ctfmon.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1968 wrote to memory of 900	1968	F34F7D8F9488CE6E2438C88F64D262B0529A25519C3EC.exe	29
PID 1968 wrote to memory of 900	1968	F34F7D8F9488CE6E2438C88F64D262B0529A25519C3EC.exe	29
PID 1968 wrote to memory of 900	1968	F34F7D8F9488CE6E2438C88F64D262B0529A25519C3EC.exe	29
PID 1968 wrote to memory of 1580	1968	F34F7D8F9488CE6E2438C88F64D262B0529A25519C3EC.exe	30
PID 1968 wrote to memory of 1580	1968	F34F7D8F9488CE6E2438C88F64D262B0529A25519C3EC.exe	30
PID 1968 wrote to memory of 1580	1968	F34F7D8F9488CE6E2438C88F64D262B0529A25519C3EC.exe	30
PID 1580 wrote to memory of 460	1580	ctfmon.exe	31
PID 1580 wrote to memory of 460	1580	ctfmon.exe	31
PID 1580 wrote to memory of 460	1580	ctfmon.exe	31

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\F34F7D8F9488CE6E2438C88F64D262B0529A25519C3EC.exe
"C:\Users\Admin\AppData\Local\Temp\F34F7D8F9488CE6E2438C88F64D262B0529A25519C3EC.exe"
1⤵
- Drops startup file
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1968
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "ctfmon" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\F34F7D8F9488CE6E2438C88F64D262B0529A25519C3EC.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:900
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ctfmon.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ctfmon.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1580
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "ctfmon" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ctfmon.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:460

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

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\Microsoft\Windows\Start Menu\Programs\Startup\ctfmon.exe

Filesize
502KB

MD5
797722758bc54671176f4ae1894e403a

SHA1
5cac11545515f1452614297a41e18411f083eac6

SHA256
f34f7d8f9488ce6e2438c88f64d262b0529a25519c3ecb947fa28147a81507d8

SHA512
dac39d79388f8d39ebc894f10a33683daead08f658ab3eae9eb969dc21c3b469d05f078a9b36ae12aebb019cbe3f15e203fe6ee24a706ac62183b2b251ab1938

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ctfmon.exe

Filesize
502KB

MD5
797722758bc54671176f4ae1894e403a

SHA1
5cac11545515f1452614297a41e18411f083eac6

SHA256
f34f7d8f9488ce6e2438c88f64d262b0529a25519c3ecb947fa28147a81507d8

SHA512
dac39d79388f8d39ebc894f10a33683daead08f658ab3eae9eb969dc21c3b469d05f078a9b36ae12aebb019cbe3f15e203fe6ee24a706ac62183b2b251ab1938

Download Submit
memory/1580-60-0x0000000000EA0000-0x0000000000F24000-memory.dmp

Filesize
528KB

Download
memory/1968-54-0x00000000009B0000-0x0000000000A34000-memory.dmp

Filesize
528KB

Download
memory/1968-55-0x000000001B0A0000-0x000000001B120000-memory.dmp

Filesize
512KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads