quasar | 6e39ea5185c45d33204cadb86a374e3a2224a4437a316e57fa6a051973fcb5d4

General

Target

6e39ea5185c45d33204cadb86a374e3a2224a4437a316e57fa6a051973fcb5d4.exe
Size

349KB
MD5

f74a56c1ae8315915efa57dc391dcace
SHA1

4a24d459bedf21c4ebf390313d6605caec76f862
SHA256

6e39ea5185c45d33204cadb86a374e3a2224a4437a316e57fa6a051973fcb5d4
SHA512

d0e24523933cb6816bb868279d1107e1bb4d73d1aa4f09689893d71ea11aed72e996033423f1cbc9c6bcc32482503104e32059dceff890244032e09d0dbe59fc
SSDEEP

6144:2K2J10qdSlEc39HGGZlMi9MqKQPxjub0n6RKCKSU+yTp0xr:2KFXZhMqKQJjDwKjd0xr

Score

10^/10

quasar proyectoscuu discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

ProyectosCUU

C2

192.168.1.198:4782

Mutex

QSR_MUTEX_m5dUI8hKcZccXa2Bjv

Attributes

encryption_key
hjqFnSRNHmM40urcuGMr
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
cles

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/1380-1-0x0000000000FA0000-0x0000000000FFE000-memory.dmp	family_quasar
behavioral1/files/0x0008000000018741-5.dat	family_quasar
behavioral1/memory/2188-11-0x0000000001230000-0x000000000128E000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2188	Client.exe

Loads dropped DLL 1 IoCs

pid	Process
1380	6e39ea5185c45d33204cadb86a374e3a2224a4437a316e57fa6a051973fcb5d4.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
2	ip-api.com

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\cles	Client.exe
File created	C:\Program Files (x86)\cles\Client.exe	6e39ea5185c45d33204cadb86a374e3a2224a4437a316e57fa6a051973fcb5d4.exe
File opened for modification	C:\Program Files (x86)\cles\Client.exe	6e39ea5185c45d33204cadb86a374e3a2224a4437a316e57fa6a051973fcb5d4.exe
File opened for modification	C:\Program Files (x86)\cles\Client.exe	Client.exe

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6e39ea5185c45d33204cadb86a374e3a2224a4437a316e57fa6a051973fcb5d4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Client.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.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
1852	schtasks.exe
3028	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1380	6e39ea5185c45d33204cadb86a374e3a2224a4437a316e57fa6a051973fcb5d4.exe
Token: SeDebugPrivilege	2188	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2188	Client.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1380 wrote to memory of 1852	1380	6e39ea5185c45d33204cadb86a374e3a2224a4437a316e57fa6a051973fcb5d4.exe	31
PID 1380 wrote to memory of 1852	1380	6e39ea5185c45d33204cadb86a374e3a2224a4437a316e57fa6a051973fcb5d4.exe	31
PID 1380 wrote to memory of 1852	1380	6e39ea5185c45d33204cadb86a374e3a2224a4437a316e57fa6a051973fcb5d4.exe	31
PID 1380 wrote to memory of 1852	1380	6e39ea5185c45d33204cadb86a374e3a2224a4437a316e57fa6a051973fcb5d4.exe	31
PID 1380 wrote to memory of 2188	1380	6e39ea5185c45d33204cadb86a374e3a2224a4437a316e57fa6a051973fcb5d4.exe	33
PID 1380 wrote to memory of 2188	1380	6e39ea5185c45d33204cadb86a374e3a2224a4437a316e57fa6a051973fcb5d4.exe	33
PID 1380 wrote to memory of 2188	1380	6e39ea5185c45d33204cadb86a374e3a2224a4437a316e57fa6a051973fcb5d4.exe	33
PID 1380 wrote to memory of 2188	1380	6e39ea5185c45d33204cadb86a374e3a2224a4437a316e57fa6a051973fcb5d4.exe	33
PID 2188 wrote to memory of 3028	2188	Client.exe	34
PID 2188 wrote to memory of 3028	2188	Client.exe	34
PID 2188 wrote to memory of 3028	2188	Client.exe	34
PID 2188 wrote to memory of 3028	2188	Client.exe	34

C:\Users\Admin\AppData\Local\Temp\6e39ea5185c45d33204cadb86a374e3a2224a4437a316e57fa6a051973fcb5d4.exe
"C:\Users\Admin\AppData\Local\Temp\6e39ea5185c45d33204cadb86a374e3a2224a4437a316e57fa6a051973fcb5d4.exe"
1⤵
- Loads dropped DLL
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1380
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\6e39ea5185c45d33204cadb86a374e3a2224a4437a316e57fa6a051973fcb5d4.exe" /rl HIGHEST /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:1852
- C:\Program Files (x86)\cles\Client.exe
  "C:\Program Files (x86)\cles\Client.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2188
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Program Files (x86)\cles\Client.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3028

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Program Files (x86)\cles\Client.exe

Filesize
349KB

MD5
f74a56c1ae8315915efa57dc391dcace

SHA1
4a24d459bedf21c4ebf390313d6605caec76f862

SHA256
6e39ea5185c45d33204cadb86a374e3a2224a4437a316e57fa6a051973fcb5d4

SHA512
d0e24523933cb6816bb868279d1107e1bb4d73d1aa4f09689893d71ea11aed72e996033423f1cbc9c6bcc32482503104e32059dceff890244032e09d0dbe59fc

Download Submit
memory/1380-0-0x0000000074A3E000-0x0000000074A3F000-memory.dmp

Filesize
4KB

Download
memory/1380-1-0x0000000000FA0000-0x0000000000FFE000-memory.dmp

Filesize
376KB

Download
memory/1380-2-0x0000000074A30000-0x000000007511E000-memory.dmp

Filesize
6.9MB

Download
memory/1380-10-0x0000000074A30000-0x000000007511E000-memory.dmp

Filesize
6.9MB

Download
memory/2188-12-0x0000000074A30000-0x000000007511E000-memory.dmp

Filesize
6.9MB

Download
memory/2188-11-0x0000000001230000-0x000000000128E000-memory.dmp

Filesize
376KB

Download
memory/2188-13-0x0000000074A30000-0x000000007511E000-memory.dmp

Filesize
6.9MB

Download
memory/2188-15-0x0000000074A30000-0x000000007511E000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads