quasar | 83e48dca5574b8875b8efd202de1841263c97e38ccf8866649e0cf9b3d894378

General

Target

83e48dca5574b8875b8efd202de1841263c97e38ccf8866649e0cf9b3d894378N.exe
Size

349KB
MD5

715f939575713752a183aa75ff78e2b0
SHA1

11ce91d273eb5af1a87ed43af27cb12a971ecdcd
SHA256

83e48dca5574b8875b8efd202de1841263c97e38ccf8866649e0cf9b3d894378
SHA512

b844ffd4d0a220033886ce2096c8c61c44e86441cf811336d1be08c5160315da4cb7a46bebf5188e51e12b386e4f4f184905a18b08e96499eabdb8814f006011
SSDEEP

6144:JK2J10qdSlEc39HGICa7TE3nKoICeeS2bwqHO4baeLV9w0Z:JKFL03nKoICeeSuOSLg0Z

Score

10^/10

quasar cotizaciones23 discovery persistence spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Cotizaciones23

C2

192.168.1.198:4782

Mutex

QSR_MUTEX_GWVYbrP9HvYlifSt0V

Attributes

encryption_key
qJrrGgGodx4vKyBDIosm
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
client
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/2100-1-0x00000000009D0000-0x0000000000A2E000-memory.dmp	family_quasar
behavioral1/files/0x000800000001960c-5.dat	family_quasar
behavioral1/memory/2828-10-0x0000000000820000-0x000000000087E000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2828	Client.exe

Loads dropped DLL 1 IoCs

pid	Process
2100	83e48dca5574b8875b8efd202de1841263c97e38ccf8866649e0cf9b3d894378N.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\client = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\83e48dca5574b8875b8efd202de1841263c97e38ccf8866649e0cf9b3d894378N.exe\""	83e48dca5574b8875b8efd202de1841263c97e38ccf8866649e0cf9b3d894378N.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

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	83e48dca5574b8875b8efd202de1841263c97e38ccf8866649e0cf9b3d894378N.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
2816	schtasks.exe
2972	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2100	83e48dca5574b8875b8efd202de1841263c97e38ccf8866649e0cf9b3d894378N.exe
Token: SeDebugPrivilege	2828	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2828	Client.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2100 wrote to memory of 2816	2100	83e48dca5574b8875b8efd202de1841263c97e38ccf8866649e0cf9b3d894378N.exe	31
PID 2100 wrote to memory of 2816	2100	83e48dca5574b8875b8efd202de1841263c97e38ccf8866649e0cf9b3d894378N.exe	31
PID 2100 wrote to memory of 2816	2100	83e48dca5574b8875b8efd202de1841263c97e38ccf8866649e0cf9b3d894378N.exe	31
PID 2100 wrote to memory of 2816	2100	83e48dca5574b8875b8efd202de1841263c97e38ccf8866649e0cf9b3d894378N.exe	31
PID 2100 wrote to memory of 2828	2100	83e48dca5574b8875b8efd202de1841263c97e38ccf8866649e0cf9b3d894378N.exe	33
PID 2100 wrote to memory of 2828	2100	83e48dca5574b8875b8efd202de1841263c97e38ccf8866649e0cf9b3d894378N.exe	33
PID 2100 wrote to memory of 2828	2100	83e48dca5574b8875b8efd202de1841263c97e38ccf8866649e0cf9b3d894378N.exe	33
PID 2100 wrote to memory of 2828	2100	83e48dca5574b8875b8efd202de1841263c97e38ccf8866649e0cf9b3d894378N.exe	33
PID 2828 wrote to memory of 2972	2828	Client.exe	34
PID 2828 wrote to memory of 2972	2828	Client.exe	34
PID 2828 wrote to memory of 2972	2828	Client.exe	34
PID 2828 wrote to memory of 2972	2828	Client.exe	34

C:\Users\Admin\AppData\Local\Temp\83e48dca5574b8875b8efd202de1841263c97e38ccf8866649e0cf9b3d894378N.exe
"C:\Users\Admin\AppData\Local\Temp\83e48dca5574b8875b8efd202de1841263c97e38ccf8866649e0cf9b3d894378N.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2100
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "client" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\83e48dca5574b8875b8efd202de1841263c97e38ccf8866649e0cf9b3d894378N.exe" /rl HIGHEST /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2816
- C:\Users\Admin\AppData\Roaming\cles\Client.exe
  "C:\Users\Admin\AppData\Roaming\cles\Client.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2828
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "client" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\cles\Client.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2972

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

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

\Users\Admin\AppData\Roaming\cles\Client.exe

Filesize
349KB

MD5
715f939575713752a183aa75ff78e2b0

SHA1
11ce91d273eb5af1a87ed43af27cb12a971ecdcd

SHA256
83e48dca5574b8875b8efd202de1841263c97e38ccf8866649e0cf9b3d894378

SHA512
b844ffd4d0a220033886ce2096c8c61c44e86441cf811336d1be08c5160315da4cb7a46bebf5188e51e12b386e4f4f184905a18b08e96499eabdb8814f006011

Download Submit
memory/2100-0-0x00000000743AE000-0x00000000743AF000-memory.dmp

Filesize
4KB

Download
memory/2100-1-0x00000000009D0000-0x0000000000A2E000-memory.dmp

Filesize
376KB

Download
memory/2100-2-0x00000000743A0000-0x0000000074A8E000-memory.dmp

Filesize
6.9MB

Download
memory/2100-13-0x00000000743A0000-0x0000000074A8E000-memory.dmp

Filesize
6.9MB

Download
memory/2828-10-0x0000000000820000-0x000000000087E000-memory.dmp

Filesize
376KB

Download
memory/2828-11-0x00000000743A0000-0x0000000074A8E000-memory.dmp

Filesize
6.9MB

Download
memory/2828-12-0x00000000743A0000-0x0000000074A8E000-memory.dmp

Filesize
6.9MB

Download
memory/2828-15-0x00000000743A0000-0x0000000074A8E000-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