quasar | bd0551475a48100dfd099d8ea6412240c9310438357a671af47e5580d108875e

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
20-12-2024 00:00

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General

Target

SpoofX.exe
Size

3.1MB
MD5

f6cbf782a601526dc279891b0600d2c8
SHA1

0e561270b8d8fb960cf9bf9f8ddab94517de03ec
SHA256

bd0551475a48100dfd099d8ea6412240c9310438357a671af47e5580d108875e
SHA512

4cc7ace57e510dcbb3019d0f48f9c76f4b2b9a251ce5752e0af5d704bc7ceccbccef770ccc0f3c5188c97045939f6a93d42a3ec5efe17561f3eb1586a22dbdc8
SSDEEP

49152:evBt62XlaSFNWPjljiFa2RoUYIg9zE24Uk/07hoGd8THHB72eh2NT:evr62XlaSFNWPjljiFXRoUYIg9rl

Score

10^/10

quasar svchost.exe spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Svchost.exe

192.168.1.190:4782

Mutex

75ec4d04-9201-465b-9d52-07fbf8901610

Attributes

encryption_key
BC9F0EB6E1FA6B8559DDF8DE0AEF08110EBCF8E5
install_name
Svchostt.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Svchostt.exe
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/744-1-0x0000000000B90000-0x0000000000EB4000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b72-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1788	Svchostt.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\system32\SubDir\Svchostt.exe	SpoofX.exe
File opened for modification	C:\Windows\system32\SubDir\Svchostt.exe	SpoofX.exe
File opened for modification	C:\Windows\system32\SubDir	SpoofX.exe
File opened for modification	C:\Windows\system32\SubDir\Svchostt.exe	Svchostt.exe
File opened for modification	C:\Windows\system32\SubDir	Svchostt.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

pid	Process
4272	schtasks.exe
4236	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	744	SpoofX.exe
Token: SeDebugPrivilege	1788	Svchostt.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1788	Svchostt.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 744 wrote to memory of 4272	744	SpoofX.exe	83
PID 744 wrote to memory of 4272	744	SpoofX.exe	83
PID 744 wrote to memory of 1788	744	SpoofX.exe	85
PID 744 wrote to memory of 1788	744	SpoofX.exe	85
PID 1788 wrote to memory of 4236	1788	Svchostt.exe	86
PID 1788 wrote to memory of 4236	1788	Svchostt.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\SpoofX.exe
"C:\Users\Admin\AppData\Local\Temp\SpoofX.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:744
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Svchostt.exe" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Svchostt.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4272
- C:\Windows\system32\SubDir\Svchostt.exe
  "C:\Windows\system32\SubDir\Svchostt.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1788
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Svchostt.exe" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Svchostt.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4236

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:\Windows\System32\SubDir\Svchostt.exe

Filesize
3.1MB

MD5
f6cbf782a601526dc279891b0600d2c8

SHA1
0e561270b8d8fb960cf9bf9f8ddab94517de03ec

SHA256
bd0551475a48100dfd099d8ea6412240c9310438357a671af47e5580d108875e

SHA512
4cc7ace57e510dcbb3019d0f48f9c76f4b2b9a251ce5752e0af5d704bc7ceccbccef770ccc0f3c5188c97045939f6a93d42a3ec5efe17561f3eb1586a22dbdc8

Download Submit
memory/744-0-0x00007FF8A8573000-0x00007FF8A8575000-memory.dmp

Filesize
8KB

Download
memory/744-1-0x0000000000B90000-0x0000000000EB4000-memory.dmp

Filesize
3.1MB

Download
memory/744-2-0x00007FF8A8570000-0x00007FF8A9031000-memory.dmp

Filesize
10.8MB

Download
memory/744-9-0x00007FF8A8570000-0x00007FF8A9031000-memory.dmp

Filesize
10.8MB

Download
memory/1788-10-0x00007FF8A8570000-0x00007FF8A9031000-memory.dmp

Filesize
10.8MB

Download
memory/1788-11-0x00007FF8A8570000-0x00007FF8A9031000-memory.dmp

Filesize
10.8MB

Download
memory/1788-12-0x0000000002CA0000-0x0000000002CF0000-memory.dmp

Filesize
320KB

Download
memory/1788-13-0x000000001C130000-0x000000001C1E2000-memory.dmp

Filesize
712KB

Download
memory/1788-14-0x00007FF8A8570000-0x00007FF8A9031000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads