quasar | d4a60c83d98c9d6c74eec924ec2e2162e52b1b891c86879e362f53e16c368c02

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
06-01-2025 15:53

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General

Target

crackedghost.exe
Size

3.1MB
MD5

8fb6e61c70265d45b480e1eca5b30e76
SHA1

0a21e12daefaeda97e884c115692e3ddaa3e0c8d
SHA256

d4a60c83d98c9d6c74eec924ec2e2162e52b1b891c86879e362f53e16c368c02
SHA512

c90dcbee2100579d3344e730e4c5d3237a9d160cd0d9ac852d50d3839ded2dc23957bd2ff9b902b0858a9f233e5169745de03d409c6afaeee6b5099ac096f77c
SSDEEP

49152:evyI22SsaNYfdPBldt698dBcjHxACw9BxISoGd7sTHHB72eh2NT:evf22SsaNYfdPBldt6+dBcjH/wzL

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.1.54:4782

Mutex

1f2a5187-d470-4222-a3bc-7922d33f971c

Attributes

encryption_key
5D09CC3094EDBAD95E2D5D556E759224738027A3
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

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

Quasar payload 3 IoCs

resource	yara_rule
behavioral1/memory/2516-1-0x00000000000D0000-0x00000000003F4000-memory.dmp	family_quasar
behavioral1/files/0x00080000000160ae-6.dat	family_quasar
behavioral1/memory/2492-8-0x00000000001A0000-0x00000000004C4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2492	Client.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
2884	schtasks.exe
2324	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2516	crackedghost.exe
Token: SeDebugPrivilege	2492	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2492	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2516 wrote to memory of 2884	2516	crackedghost.exe	30
PID 2516 wrote to memory of 2884	2516	crackedghost.exe	30
PID 2516 wrote to memory of 2884	2516	crackedghost.exe	30
PID 2516 wrote to memory of 2492	2516	crackedghost.exe	32
PID 2516 wrote to memory of 2492	2516	crackedghost.exe	32
PID 2516 wrote to memory of 2492	2516	crackedghost.exe	32
PID 2492 wrote to memory of 2324	2492	Client.exe	33
PID 2492 wrote to memory of 2324	2492	Client.exe	33
PID 2492 wrote to memory of 2324	2492	Client.exe	33

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\crackedghost.exe
"C:\Users\Admin\AppData\Local\Temp\crackedghost.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2516
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2884
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2492
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2324

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\SubDir\Client.exe

Filesize
3.1MB

MD5
8fb6e61c70265d45b480e1eca5b30e76

SHA1
0a21e12daefaeda97e884c115692e3ddaa3e0c8d

SHA256
d4a60c83d98c9d6c74eec924ec2e2162e52b1b891c86879e362f53e16c368c02

SHA512
c90dcbee2100579d3344e730e4c5d3237a9d160cd0d9ac852d50d3839ded2dc23957bd2ff9b902b0858a9f233e5169745de03d409c6afaeee6b5099ac096f77c

Download Submit
memory/2492-8-0x00000000001A0000-0x00000000004C4000-memory.dmp

Filesize
3.1MB

Download
memory/2492-10-0x000007FEF50D0000-0x000007FEF5ABC000-memory.dmp

Filesize
9.9MB

Download
memory/2492-11-0x000007FEF50D0000-0x000007FEF5ABC000-memory.dmp

Filesize
9.9MB

Download
memory/2492-12-0x000007FEF50D0000-0x000007FEF5ABC000-memory.dmp

Filesize
9.9MB

Download
memory/2516-0-0x000007FEF50D3000-0x000007FEF50D4000-memory.dmp

Filesize
4KB

Download
memory/2516-1-0x00000000000D0000-0x00000000003F4000-memory.dmp

Filesize
3.1MB

Download
memory/2516-2-0x000007FEF50D0000-0x000007FEF5ABC000-memory.dmp

Filesize
9.9MB

Download
memory/2516-9-0x000007FEF50D0000-0x000007FEF5ABC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads