quasar | 7d7e29dde2edde3489254aec74a55ce94c93c6636eb6aca26fba7c9c0d1a3cc9

General

Target

7d7e29dde2edde3489254aec74a55ce94c93c6636eb6aca26fba7c9c0d1a3cc9N.exe
Size

349KB
MD5

f859adf963e5d8d201ed119bb32a2a40
SHA1

9cf31cc20c2c9bfa41de6e55b818cd026151b24e
SHA256

7d7e29dde2edde3489254aec74a55ce94c93c6636eb6aca26fba7c9c0d1a3cc9
SHA512

156912459855fa626c9822ff5ff2f3ff0bc5a49d80c3f1bc96085379df0818fadb44340253c3ad1bd81057154db1e043cfa59b37350717623455ee2f2428ec1b
SSDEEP

6144:2K2J10qdSlEc39HGGZlMi9MqKQPxjub0n6RKCKSU+yTp0x:2KFXZhMqKQJjDwKjd0x

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 2 IoCs

resource	yara_rule
behavioral2/memory/4332-1-0x0000000000D90000-0x0000000000DEE000-memory.dmp	family_quasar
behavioral2/files/0x000b000000023b82-11.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2484	Client.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
12	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	7d7e29dde2edde3489254aec74a55ce94c93c6636eb6aca26fba7c9c0d1a3cc9N.exe
File opened for modification	C:\Program Files (x86)\cles\Client.exe	Client.exe
File opened for modification	C:\Program Files (x86)\cles	Client.exe
File created	C:\Program Files (x86)\cles\Client.exe	7d7e29dde2edde3489254aec74a55ce94c93c6636eb6aca26fba7c9c0d1a3cc9N.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	7d7e29dde2edde3489254aec74a55ce94c93c6636eb6aca26fba7c9c0d1a3cc9N.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
4324	schtasks.exe
2840	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4332	7d7e29dde2edde3489254aec74a55ce94c93c6636eb6aca26fba7c9c0d1a3cc9N.exe
Token: SeDebugPrivilege	2484	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2484	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4332 wrote to memory of 4324	4332	7d7e29dde2edde3489254aec74a55ce94c93c6636eb6aca26fba7c9c0d1a3cc9N.exe	87
PID 4332 wrote to memory of 4324	4332	7d7e29dde2edde3489254aec74a55ce94c93c6636eb6aca26fba7c9c0d1a3cc9N.exe	87
PID 4332 wrote to memory of 4324	4332	7d7e29dde2edde3489254aec74a55ce94c93c6636eb6aca26fba7c9c0d1a3cc9N.exe	87
PID 4332 wrote to memory of 2484	4332	7d7e29dde2edde3489254aec74a55ce94c93c6636eb6aca26fba7c9c0d1a3cc9N.exe	89
PID 4332 wrote to memory of 2484	4332	7d7e29dde2edde3489254aec74a55ce94c93c6636eb6aca26fba7c9c0d1a3cc9N.exe	89
PID 4332 wrote to memory of 2484	4332	7d7e29dde2edde3489254aec74a55ce94c93c6636eb6aca26fba7c9c0d1a3cc9N.exe	89
PID 2484 wrote to memory of 2840	2484	Client.exe	94
PID 2484 wrote to memory of 2840	2484	Client.exe	94
PID 2484 wrote to memory of 2840	2484	Client.exe	94

C:\Users\Admin\AppData\Local\Temp\7d7e29dde2edde3489254aec74a55ce94c93c6636eb6aca26fba7c9c0d1a3cc9N.exe
"C:\Users\Admin\AppData\Local\Temp\7d7e29dde2edde3489254aec74a55ce94c93c6636eb6aca26fba7c9c0d1a3cc9N.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4332
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\7d7e29dde2edde3489254aec74a55ce94c93c6636eb6aca26fba7c9c0d1a3cc9N.exe" /rl HIGHEST /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:4324
- 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:2484
- - 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:2840

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

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

Filesize
349KB

MD5
f859adf963e5d8d201ed119bb32a2a40

SHA1
9cf31cc20c2c9bfa41de6e55b818cd026151b24e

SHA256
7d7e29dde2edde3489254aec74a55ce94c93c6636eb6aca26fba7c9c0d1a3cc9

SHA512
156912459855fa626c9822ff5ff2f3ff0bc5a49d80c3f1bc96085379df0818fadb44340253c3ad1bd81057154db1e043cfa59b37350717623455ee2f2428ec1b

Download Submit
memory/2484-19-0x0000000074E90000-0x0000000075640000-memory.dmp

Filesize
7.7MB

Download
memory/2484-18-0x00000000070B0000-0x00000000070BA000-memory.dmp

Filesize
40KB

Download
memory/2484-16-0x0000000074E90000-0x0000000075640000-memory.dmp

Filesize
7.7MB

Download
memory/2484-13-0x0000000074E90000-0x0000000075640000-memory.dmp

Filesize
7.7MB

Download
memory/4332-3-0x0000000005700000-0x0000000005792000-memory.dmp

Filesize
584KB

Download
memory/4332-6-0x0000000006500000-0x0000000006512000-memory.dmp

Filesize
72KB

Download
memory/4332-7-0x0000000006A40000-0x0000000006A7C000-memory.dmp

Filesize
240KB

Download
memory/4332-5-0x00000000057A0000-0x0000000005806000-memory.dmp

Filesize
408KB

Download
memory/4332-4-0x0000000074E90000-0x0000000075640000-memory.dmp

Filesize
7.7MB

Download
memory/4332-15-0x0000000074E90000-0x0000000075640000-memory.dmp

Filesize
7.7MB

Download
memory/4332-0-0x0000000074E9E000-0x0000000074E9F000-memory.dmp

Filesize
4KB

Download
memory/4332-2-0x0000000005CB0000-0x0000000006254000-memory.dmp

Filesize
5.6MB

Download
memory/4332-1-0x0000000000D90000-0x0000000000DEE000-memory.dmp

Filesize
376KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads