quasar | 8e52ba8956d643c96cdeb75c43492302cf710a3d2acc852442930dedbe9ea1bb

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
22/03/2025, 06:18

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General

Target

ea2b9ce0bf438cd413b9da177608b91c6a1129a65917f66ae2db49a4d6776ee8.exe
Size

3.1MB
MD5

59cced923e3a96704b1e7b5549559aa7
SHA1

2a463e2d878673c2041d0064b5185193efbd3113
SHA256

ea2b9ce0bf438cd413b9da177608b91c6a1129a65917f66ae2db49a4d6776ee8
SHA512

6f232972332a860120c663462b836124575ef9208eb1e0e9c7e75b9720f1a22ff09c264e8339f7fb75bb04bafed79bd282bf3d65837f7beec09642cf0dc80d61
SSDEEP

49152:mvBt62XlaSFNWPjljiFa2RoUYIxpxNESE2k/iNLoGdXTHHB72eh2NT:mvr62XlaSFNWPjljiFXRoUYIrxJF

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

0.tcp.ngrok.io:16515

Mutex

8d4f5337-a7b5-4237-9349-d9bede1e2337

Attributes

encryption_key
CC1E18558E65763D4940C1C87A6788F6761FFA4D
install_name
svchostt.exe
log_directory
Logs
reconnect_delay
3000
startup_key
win64launcher
subdirectory
SubDirr

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/4716-1-0x0000000000FB0000-0x00000000012D4000-memory.dmp	family_quasar
behavioral2/files/0x000b000000023f57-8.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1544	svchostt.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 4 IoCs

Web Service

T1102

flow	ioc
22	0.tcp.ngrok.io
66	0.tcp.ngrok.io
79	0.tcp.ngrok.io
87	0.tcp.ngrok.io

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\SubDirr	svchostt.exe
File created	C:\Windows\system32\SubDirr\svchostt.exe	ea2b9ce0bf438cd413b9da177608b91c6a1129a65917f66ae2db49a4d6776ee8.exe
File opened for modification	C:\Windows\system32\SubDirr\svchostt.exe	ea2b9ce0bf438cd413b9da177608b91c6a1129a65917f66ae2db49a4d6776ee8.exe
File opened for modification	C:\Windows\system32\SubDirr	ea2b9ce0bf438cd413b9da177608b91c6a1129a65917f66ae2db49a4d6776ee8.exe
File opened for modification	C:\Windows\system32\SubDirr\svchostt.exe	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
4668	schtasks.exe
1508	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4716	ea2b9ce0bf438cd413b9da177608b91c6a1129a65917f66ae2db49a4d6776ee8.exe
Token: SeDebugPrivilege	1544	svchostt.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1544	svchostt.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4716 wrote to memory of 4668	4716	ea2b9ce0bf438cd413b9da177608b91c6a1129a65917f66ae2db49a4d6776ee8.exe	89
PID 4716 wrote to memory of 4668	4716	ea2b9ce0bf438cd413b9da177608b91c6a1129a65917f66ae2db49a4d6776ee8.exe	89
PID 4716 wrote to memory of 1544	4716	ea2b9ce0bf438cd413b9da177608b91c6a1129a65917f66ae2db49a4d6776ee8.exe	91
PID 4716 wrote to memory of 1544	4716	ea2b9ce0bf438cd413b9da177608b91c6a1129a65917f66ae2db49a4d6776ee8.exe	91
PID 1544 wrote to memory of 1508	1544	svchostt.exe	92
PID 1544 wrote to memory of 1508	1544	svchostt.exe	92

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\ea2b9ce0bf438cd413b9da177608b91c6a1129a65917f66ae2db49a4d6776ee8.exe
"C:\Users\Admin\AppData\Local\Temp\ea2b9ce0bf438cd413b9da177608b91c6a1129a65917f66ae2db49a4d6776ee8.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4716
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "win64launcher" /sc ONLOGON /tr "C:\Windows\system32\SubDirr\svchostt.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4668
- C:\Windows\system32\SubDirr\svchostt.exe
  "C:\Windows\system32\SubDirr\svchostt.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1544
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "win64launcher" /sc ONLOGON /tr "C:\Windows\system32\SubDirr\svchostt.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1508

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

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Windows\system32\SubDirr\svchostt.exe

Filesize
3.1MB

MD5
59cced923e3a96704b1e7b5549559aa7

SHA1
2a463e2d878673c2041d0064b5185193efbd3113

SHA256
ea2b9ce0bf438cd413b9da177608b91c6a1129a65917f66ae2db49a4d6776ee8

SHA512
6f232972332a860120c663462b836124575ef9208eb1e0e9c7e75b9720f1a22ff09c264e8339f7fb75bb04bafed79bd282bf3d65837f7beec09642cf0dc80d61

Download Submit
memory/1544-10-0x00007FFC91E00000-0x00007FFC928C1000-memory.dmp

Filesize
10.8MB

Download
memory/1544-11-0x00007FFC91E00000-0x00007FFC928C1000-memory.dmp

Filesize
10.8MB

Download
memory/1544-12-0x000000001C2C0000-0x000000001C310000-memory.dmp

Filesize
320KB

Download
memory/1544-13-0x000000001C3D0000-0x000000001C482000-memory.dmp

Filesize
712KB

Download
memory/1544-14-0x00007FFC91E00000-0x00007FFC928C1000-memory.dmp

Filesize
10.8MB

Download
memory/4716-0-0x00007FFC91E03000-0x00007FFC91E05000-memory.dmp

Filesize
8KB

Download
memory/4716-1-0x0000000000FB0000-0x00000000012D4000-memory.dmp

Filesize
3.1MB

Download
memory/4716-2-0x00007FFC91E00000-0x00007FFC928C1000-memory.dmp

Filesize
10.8MB

Download
memory/4716-9-0x00007FFC91E00000-0x00007FFC928C1000-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