quasar | 655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995

General

Target

655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995.exe
Size

3.1MB
MD5

ee86735f1427e86dcbba39339cecfe15
SHA1

cd492443264bdae1f0a5e5f16e57af3d1819a3ec
SHA256

655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995
SHA512

59309d24c6df7d66033afe1aac2a7cc734438c3a6dfd02ad8a20299216fee4417dd10931a283366cbf42dea2b83b3e451527817c084bb20aac4c9800c68b82b1
SSDEEP

49152:2v9t62XlaSFNWPjljiFa2RoUYI8IRJ6ibR3LoGdeoYtTHHB72eh2NT:2v/62XlaSFNWPjljiFXRoUYI8IRJ6c

Score

10^/10

quasar qussa spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Qussa

C2

ggergejhijseih.myvnc.com:47820

Mutex

5910e19f-3073-4c42-a174-513d316126e7

Attributes

encryption_key
7A23123B6E1E0CCDB27477C6C7654C7BE2FEDE54
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
xml
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/908-1-0x00000000004F0000-0x0000000000814000-memory.dmp	family_quasar
behavioral2/files/0x0008000000023c93-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3280	Client.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\system32\SubDir\Client.exe	655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995.exe
File opened for modification	C:\Windows\system32\SubDir\Client.exe	655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995.exe
File opened for modification	C:\Windows\system32\SubDir	655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995.exe
File opened for modification	C:\Windows\system32\SubDir\Client.exe	Client.exe
File opened for modification	C:\Windows\system32\SubDir	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
948	schtasks.exe
2032	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	908	655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995.exe
Token: SeDebugPrivilege	3280	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 908 wrote to memory of 948	908	655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995.exe	83
PID 908 wrote to memory of 948	908	655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995.exe	83
PID 908 wrote to memory of 3280	908	655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995.exe	85
PID 908 wrote to memory of 3280	908	655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995.exe	85
PID 3280 wrote to memory of 2032	3280	Client.exe	86
PID 3280 wrote to memory of 2032	3280	Client.exe	86

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\655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995.exe
"C:\Users\Admin\AppData\Local\Temp\655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:908
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "xml" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:948
- C:\Windows\system32\SubDir\Client.exe
  "C:\Windows\system32\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3280
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "xml" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2032

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\System32\SubDir\Client.exe

Filesize
3.1MB

MD5
ee86735f1427e86dcbba39339cecfe15

SHA1
cd492443264bdae1f0a5e5f16e57af3d1819a3ec

SHA256
655d2103255a0ec7e0aa4b488d75499ce880428fdcc2831bfdc52987b4660995

SHA512
59309d24c6df7d66033afe1aac2a7cc734438c3a6dfd02ad8a20299216fee4417dd10931a283366cbf42dea2b83b3e451527817c084bb20aac4c9800c68b82b1

Download Submit
memory/908-0-0x00007FFE599A3000-0x00007FFE599A5000-memory.dmp

Filesize
8KB

Download
memory/908-1-0x00000000004F0000-0x0000000000814000-memory.dmp

Filesize
3.1MB

Download
memory/908-2-0x00007FFE599A0000-0x00007FFE5A461000-memory.dmp

Filesize
10.8MB

Download
memory/908-9-0x00007FFE599A0000-0x00007FFE5A461000-memory.dmp

Filesize
10.8MB

Download
memory/3280-10-0x00007FFE599A0000-0x00007FFE5A461000-memory.dmp

Filesize
10.8MB

Download
memory/3280-11-0x00007FFE599A0000-0x00007FFE5A461000-memory.dmp

Filesize
10.8MB

Download
memory/3280-12-0x000000001BAB0000-0x000000001BB00000-memory.dmp

Filesize
320KB

Download
memory/3280-13-0x000000001C1F0000-0x000000001C2A2000-memory.dmp

Filesize
712KB

Download
memory/3280-14-0x00007FFE599A0000-0x00007FFE5A461000-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