quasar | ed237426763cff72e5e75aa93dee447e1c78fe91f6c6acf48c76674d2762e1ab

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
14-01-2025 01:54

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General

Target

Client-built.exe
Size

3.1MB
MD5

2594c80a4d8d3b9c2f93cab60eef17c3
SHA1

c0f60b85cce551523cccba6c89286b435326b692
SHA256

ed237426763cff72e5e75aa93dee447e1c78fe91f6c6acf48c76674d2762e1ab
SHA512

d1caf32394d494e9cba71346f400db2995515ce02e570c7350c123b15dd0bcef8e8368073688929935b9c2516c7ca69c39abbdc1f141b3bba3855ee492b7764e
SSDEEP

49152:+vaY52fyaSZOrPWluWBuGG5g5hl9C+5wGjBev6oGdU/bTHHB72eh2NT:+vv52fyaSZOrPWluWBDG5g5hbCc

Score

10^/10

quasar offset spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Offset

127.0.0.1:8080

Mutex

6210ab1d-dd45-4f17-a324-f24c1474c4d8

Attributes

encryption_key
CABE6FE0988CAB22AE614AA6065A89402DF1C513
install_name
svchost.exe
log_directory
Logs
reconnect_delay
3000
startup_key
conhost
subdirectory
Windows

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/4636-1-0x0000000000AF0000-0x0000000000E14000-memory.dmp	family_quasar
behavioral2/files/0x000d000000023a69-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2684	svchost.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
4200	schtasks.exe
4576	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4636	Client-built.exe
Token: SeDebugPrivilege	2684	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2684	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4636 wrote to memory of 4200	4636	Client-built.exe	84
PID 4636 wrote to memory of 4200	4636	Client-built.exe	84
PID 4636 wrote to memory of 2684	4636	Client-built.exe	86
PID 4636 wrote to memory of 2684	4636	Client-built.exe	86
PID 2684 wrote to memory of 4576	2684	svchost.exe	88
PID 2684 wrote to memory of 4576	2684	svchost.exe	88

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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4636
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "conhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\svchost.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4200
- C:\Users\Admin\AppData\Roaming\Windows\svchost.exe
  "C:\Users\Admin\AppData\Roaming\Windows\svchost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2684
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "conhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\svchost.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4576

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:\Users\Admin\AppData\Roaming\Windows\svchost.exe

Filesize
3.1MB

MD5
2594c80a4d8d3b9c2f93cab60eef17c3

SHA1
c0f60b85cce551523cccba6c89286b435326b692

SHA256
ed237426763cff72e5e75aa93dee447e1c78fe91f6c6acf48c76674d2762e1ab

SHA512
d1caf32394d494e9cba71346f400db2995515ce02e570c7350c123b15dd0bcef8e8368073688929935b9c2516c7ca69c39abbdc1f141b3bba3855ee492b7764e

Download Submit
memory/2684-10-0x00007FF9F5A70000-0x00007FF9F6531000-memory.dmp

Filesize
10.8MB

Download
memory/2684-11-0x000000001C850000-0x000000001C8A0000-memory.dmp

Filesize
320KB

Download
memory/2684-12-0x000000001C960000-0x000000001CA12000-memory.dmp

Filesize
712KB

Download
memory/2684-13-0x00007FF9F5A70000-0x00007FF9F6531000-memory.dmp

Filesize
10.8MB

Download
memory/4636-0-0x00007FF9F5A73000-0x00007FF9F5A75000-memory.dmp

Filesize
8KB

Download
memory/4636-1-0x0000000000AF0000-0x0000000000E14000-memory.dmp

Filesize
3.1MB

Download
memory/4636-2-0x00007FF9F5A70000-0x00007FF9F6531000-memory.dmp

Filesize
10.8MB

Download
memory/4636-9-0x00007FF9F5A70000-0x00007FF9F6531000-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