quasar | 5420cbc5d6be7831ccd48e8c7860f7d5c1060db80ed82063258f81c777aca8f1

General

Target

5420cbc5d6be7831ccd48e8c7860f7d5c1060db80ed82063258f81c777aca8f1.exe
Size

3.1MB
MD5

2fd750229aa6122c30607bb59293a909
SHA1

0feb9d22c13e6c2d19942788a49721db23e48d35
SHA256

5420cbc5d6be7831ccd48e8c7860f7d5c1060db80ed82063258f81c777aca8f1
SHA512

772b515f3efcff2a0fde47c125f9531d50028394a6c758e45e54743298714d118edaa94c6a67034a8a1cdce06f68342acee5b0fc0bc5ca610d28e8b8a6f52dec
SSDEEP

49152:Dvht62XlaSFNWPjljiFa2RoUYImsRJ6abR3LoGdlTHHB72eh2NT:DvL62XlaSFNWPjljiFXRoUYImsRJ60

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

0.tcp.us-cal-1.ngrok.io:11837

Mutex

11bbf22e-826e-486b-b024-adbd86228a9e

Attributes

encryption_key
7A589EDBC6A581E125BF830EF0D05FC74BB75E30
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
ctfmon
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/4952-1-0x0000000000880000-0x0000000000BA4000-memory.dmp	family_quasar
behavioral2/files/0x0008000000023c60-7.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3752	Client.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service

T1102

flow	ioc
66	0.tcp.us-cal-1.ngrok.io
13	0.tcp.us-cal-1.ngrok.io
48	0.tcp.us-cal-1.ngrok.io

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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
4132	schtasks.exe
3068	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4952	5420cbc5d6be7831ccd48e8c7860f7d5c1060db80ed82063258f81c777aca8f1.exe
Token: SeDebugPrivilege	3752	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3752	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3752	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3752	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4952 wrote to memory of 4132	4952	5420cbc5d6be7831ccd48e8c7860f7d5c1060db80ed82063258f81c777aca8f1.exe	82
PID 4952 wrote to memory of 4132	4952	5420cbc5d6be7831ccd48e8c7860f7d5c1060db80ed82063258f81c777aca8f1.exe	82
PID 4952 wrote to memory of 3752	4952	5420cbc5d6be7831ccd48e8c7860f7d5c1060db80ed82063258f81c777aca8f1.exe	84
PID 4952 wrote to memory of 3752	4952	5420cbc5d6be7831ccd48e8c7860f7d5c1060db80ed82063258f81c777aca8f1.exe	84
PID 3752 wrote to memory of 3068	3752	Client.exe	85
PID 3752 wrote to memory of 3068	3752	Client.exe	85

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\5420cbc5d6be7831ccd48e8c7860f7d5c1060db80ed82063258f81c777aca8f1.exe
"C:\Users\Admin\AppData\Local\Temp\5420cbc5d6be7831ccd48e8c7860f7d5c1060db80ed82063258f81c777aca8f1.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4952
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "ctfmon" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4132
- 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 FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3752
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "ctfmon" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3068

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
3.1MB

MD5
2fd750229aa6122c30607bb59293a909

SHA1
0feb9d22c13e6c2d19942788a49721db23e48d35

SHA256
5420cbc5d6be7831ccd48e8c7860f7d5c1060db80ed82063258f81c777aca8f1

SHA512
772b515f3efcff2a0fde47c125f9531d50028394a6c758e45e54743298714d118edaa94c6a67034a8a1cdce06f68342acee5b0fc0bc5ca610d28e8b8a6f52dec

Download Submit
memory/3752-9-0x00007FF9184C0000-0x00007FF918F81000-memory.dmp

Filesize
10.8MB

Download
memory/3752-11-0x00007FF9184C0000-0x00007FF918F81000-memory.dmp

Filesize
10.8MB

Download
memory/3752-12-0x000000001C5C0000-0x000000001C610000-memory.dmp

Filesize
320KB

Download
memory/3752-13-0x000000001C6D0000-0x000000001C782000-memory.dmp

Filesize
712KB

Download
memory/3752-14-0x00007FF9184C0000-0x00007FF918F81000-memory.dmp

Filesize
10.8MB

Download
memory/4952-0-0x00007FF9184C3000-0x00007FF9184C5000-memory.dmp

Filesize
8KB

Download
memory/4952-1-0x0000000000880000-0x0000000000BA4000-memory.dmp

Filesize
3.1MB

Download
memory/4952-2-0x00007FF9184C0000-0x00007FF918F81000-memory.dmp

Filesize
10.8MB

Download
memory/4952-10-0x00007FF9184C0000-0x00007FF918F81000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads