quasar | 77c61d4dd21b5b2319e14d750799a1be96254cb0fd4c7edd3e81bc825c91594c

Analysis

max time kernel
147s
max time network
142s
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 01:53

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General

Target

Client-built.exe
Size

3.1MB
MD5

18833ce91b26be79378f897dca190f66
SHA1

c7fdea28474a3e12ebe51aa878abeed9969d8d01
SHA256

77c61d4dd21b5b2319e14d750799a1be96254cb0fd4c7edd3e81bc825c91594c
SHA512

565b069175f60cce8d67eddfe41bc8ab5caadbe2ed41acd7a3108b96c3cf7fbdbc8593af7bbe1ad6ac33dd0444866073eff65ff001458b7e94c8ded9f41561c6
SSDEEP

49152:SvaY52fyaSZOrPWluWBuGG5g5hnDmVmzmioGdKeTHHB72eh2NT:Svv52fyaSZOrPWluWBDG5g5hnDmC

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/3616-1-0x00000000006A0000-0x00000000009C4000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023c8e-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4560	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
3752	schtasks.exe
2660	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3616	Client-built.exe
Token: SeDebugPrivilege	4560	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4560	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3616 wrote to memory of 3752	3616	Client-built.exe	84
PID 3616 wrote to memory of 3752	3616	Client-built.exe	84
PID 3616 wrote to memory of 4560	3616	Client-built.exe	86
PID 3616 wrote to memory of 4560	3616	Client-built.exe	86
PID 4560 wrote to memory of 2660	4560	svchost.exe	87
PID 4560 wrote to memory of 2660	4560	svchost.exe	87

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:3616
- 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:3752
- 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:4560
- - 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:2660

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
18833ce91b26be79378f897dca190f66

SHA1
c7fdea28474a3e12ebe51aa878abeed9969d8d01

SHA256
77c61d4dd21b5b2319e14d750799a1be96254cb0fd4c7edd3e81bc825c91594c

SHA512
565b069175f60cce8d67eddfe41bc8ab5caadbe2ed41acd7a3108b96c3cf7fbdbc8593af7bbe1ad6ac33dd0444866073eff65ff001458b7e94c8ded9f41561c6

Download Submit
memory/3616-0-0x00007FFE6D833000-0x00007FFE6D835000-memory.dmp

Filesize
8KB

Download
memory/3616-1-0x00000000006A0000-0x00000000009C4000-memory.dmp

Filesize
3.1MB

Download
memory/3616-2-0x00007FFE6D830000-0x00007FFE6E2F1000-memory.dmp

Filesize
10.8MB

Download
memory/3616-9-0x00007FFE6D830000-0x00007FFE6E2F1000-memory.dmp

Filesize
10.8MB

Download
memory/4560-10-0x00007FFE6D830000-0x00007FFE6E2F1000-memory.dmp

Filesize
10.8MB

Download
memory/4560-11-0x000000001C3B0000-0x000000001C400000-memory.dmp

Filesize
320KB

Download
memory/4560-12-0x000000001CCC0000-0x000000001CD72000-memory.dmp

Filesize
712KB

Download
memory/4560-13-0x00007FFE6D830000-0x00007FFE6E2F1000-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