quasar | 315a4ecb30f4abca83a84677a5c19936d2c0818f1775cda187d09695518a73a9

Analysis

max time kernel
296s
max time network
293s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
11-02-2025 17:01

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General

Target

COMPROBANTE de PAGO.exe
Size

854KB
MD5

e56d988fd3f4b747bf69c724085878d6
SHA1

876cbcce543f49cf190a12c4a07c3139247e05ab
SHA256

e490dc9257f951ed3e61055852315cac3f13dd404f88d546a06010639fb55f93
SHA512

06f1c1e8c48340dda4115d0b5221502ad90a5e92e1eafc351d765ec91343a91e5bda8fb85d8cee1601a69800dd5502492310aa01b32aba5a3b11ba9120f881d6
SSDEEP

24576:JRuPGExISnGAvq4TYlCjXZfQVbhImUTdlmajaO:z96wgYUjX9uhnU5o

Score

10^/10

quasar stroy3 discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Stroy3

twentyfivev.crabdance.com:61538

127.0.0.1:61538

Mutex

QSR_MUTEX_jgYB0FbAXwuBLBMCAM

Attributes

encryption_key
7ghxCAmzO7RIdS51gVaQ
install_name
cpdater.exe
log_directory
Logs
reconnect_delay
3000
startup_key
cindows cpdater
subdirectory
cindows

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/2400-9-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar
behavioral1/memory/2400-7-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar
behavioral1/memory/2400-5-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar

Executes dropped EXE 3 IoCs

pid	Process
2604	cpdater.exe
1884	cpdater.exe
524	cpdater.exe

Loads dropped DLL 1 IoCs

pid	Process
316	COMPROBANTE de PAGO.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

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2380 set thread context of 2400	2380	COMPROBANTE de PAGO.exe	30
PID 2380 set thread context of 316	2380	COMPROBANTE de PAGO.exe	31
PID 2604 set thread context of 1884	2604	cpdater.exe	36
PID 2604 set thread context of 524	2604	cpdater.exe	37

System Location Discovery: System Language Discovery 1 TTPs 8 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	COMPROBANTE de PAGO.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	COMPROBANTE de PAGO.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cpdater.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cpdater.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cpdater.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	COMPROBANTE de PAGO.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
2652	schtasks.exe
2864	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2380	COMPROBANTE de PAGO.exe
Token: SeDebugPrivilege	316	COMPROBANTE de PAGO.exe
Token: SeDebugPrivilege	2604	cpdater.exe
Token: SeDebugPrivilege	524	cpdater.exe

Suspicious use of WriteProcessMemory 48 IoCs

description	pid	Process	procid_target
PID 2380 wrote to memory of 2400	2380	COMPROBANTE de PAGO.exe	30
PID 2380 wrote to memory of 2400	2380	COMPROBANTE de PAGO.exe	30
PID 2380 wrote to memory of 2400	2380	COMPROBANTE de PAGO.exe	30
PID 2380 wrote to memory of 2400	2380	COMPROBANTE de PAGO.exe	30
PID 2380 wrote to memory of 2400	2380	COMPROBANTE de PAGO.exe	30
PID 2380 wrote to memory of 2400	2380	COMPROBANTE de PAGO.exe	30
PID 2380 wrote to memory of 2400	2380	COMPROBANTE de PAGO.exe	30
PID 2380 wrote to memory of 2400	2380	COMPROBANTE de PAGO.exe	30
PID 2380 wrote to memory of 2400	2380	COMPROBANTE de PAGO.exe	30
PID 2380 wrote to memory of 316	2380	COMPROBANTE de PAGO.exe	31
PID 2380 wrote to memory of 316	2380	COMPROBANTE de PAGO.exe	31
PID 2380 wrote to memory of 316	2380	COMPROBANTE de PAGO.exe	31
PID 2380 wrote to memory of 316	2380	COMPROBANTE de PAGO.exe	31
PID 2380 wrote to memory of 316	2380	COMPROBANTE de PAGO.exe	31
PID 2380 wrote to memory of 316	2380	COMPROBANTE de PAGO.exe	31
PID 2380 wrote to memory of 316	2380	COMPROBANTE de PAGO.exe	31
PID 2380 wrote to memory of 316	2380	COMPROBANTE de PAGO.exe	31
PID 2380 wrote to memory of 316	2380	COMPROBANTE de PAGO.exe	31
PID 316 wrote to memory of 2864	316	COMPROBANTE de PAGO.exe	33
PID 316 wrote to memory of 2864	316	COMPROBANTE de PAGO.exe	33
PID 316 wrote to memory of 2864	316	COMPROBANTE de PAGO.exe	33
PID 316 wrote to memory of 2864	316	COMPROBANTE de PAGO.exe	33
PID 316 wrote to memory of 2604	316	COMPROBANTE de PAGO.exe	35
PID 316 wrote to memory of 2604	316	COMPROBANTE de PAGO.exe	35
PID 316 wrote to memory of 2604	316	COMPROBANTE de PAGO.exe	35
PID 316 wrote to memory of 2604	316	COMPROBANTE de PAGO.exe	35
PID 2604 wrote to memory of 1884	2604	cpdater.exe	36
PID 2604 wrote to memory of 1884	2604	cpdater.exe	36
PID 2604 wrote to memory of 1884	2604	cpdater.exe	36
PID 2604 wrote to memory of 1884	2604	cpdater.exe	36
PID 2604 wrote to memory of 1884	2604	cpdater.exe	36
PID 2604 wrote to memory of 1884	2604	cpdater.exe	36
PID 2604 wrote to memory of 1884	2604	cpdater.exe	36
PID 2604 wrote to memory of 1884	2604	cpdater.exe	36
PID 2604 wrote to memory of 1884	2604	cpdater.exe	36
PID 2604 wrote to memory of 524	2604	cpdater.exe	37
PID 2604 wrote to memory of 524	2604	cpdater.exe	37
PID 2604 wrote to memory of 524	2604	cpdater.exe	37
PID 2604 wrote to memory of 524	2604	cpdater.exe	37
PID 2604 wrote to memory of 524	2604	cpdater.exe	37
PID 2604 wrote to memory of 524	2604	cpdater.exe	37
PID 2604 wrote to memory of 524	2604	cpdater.exe	37
PID 2604 wrote to memory of 524	2604	cpdater.exe	37
PID 2604 wrote to memory of 524	2604	cpdater.exe	37
PID 524 wrote to memory of 2652	524	cpdater.exe	38
PID 524 wrote to memory of 2652	524	cpdater.exe	38
PID 524 wrote to memory of 2652	524	cpdater.exe	38
PID 524 wrote to memory of 2652	524	cpdater.exe	38

C:\Users\Admin\AppData\Local\Temp\COMPROBANTE de PAGO.exe
"C:\Users\Admin\AppData\Local\Temp\COMPROBANTE de PAGO.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2380
- C:\Users\Admin\AppData\Local\Temp\COMPROBANTE de PAGO.exe
  "C:\Users\Admin\AppData\Local\Temp\COMPROBANTE de PAGO.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2400
- C:\Users\Admin\AppData\Local\Temp\COMPROBANTE de PAGO.exe
  "C:\Users\Admin\AppData\Local\Temp\COMPROBANTE de PAGO.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:316
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "cindows cpdater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\COMPROBANTE de PAGO.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2864
- - C:\Users\Admin\AppData\Roaming\cindows\cpdater.exe
    "C:\Users\Admin\AppData\Roaming\cindows\cpdater.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2604
  - - C:\Users\Admin\AppData\Roaming\cindows\cpdater.exe
      C:\Users\Admin\AppData\Roaming\cindows\cpdater.exe
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:1884
  - - C:\Users\Admin\AppData\Roaming\cindows\cpdater.exe
      C:\Users\Admin\AppData\Roaming\cindows\cpdater.exe
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:524
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "cindows cpdater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\cindows\cpdater.exe" /rl HIGHEST /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:2652

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Roaming\cindows\cpdater.exe

Filesize
854KB

MD5
e56d988fd3f4b747bf69c724085878d6

SHA1
876cbcce543f49cf190a12c4a07c3139247e05ab

SHA256
e490dc9257f951ed3e61055852315cac3f13dd404f88d546a06010639fb55f93

SHA512
06f1c1e8c48340dda4115d0b5221502ad90a5e92e1eafc351d765ec91343a91e5bda8fb85d8cee1601a69800dd5502492310aa01b32aba5a3b11ba9120f881d6

Download Submit
memory/316-16-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/316-26-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/316-18-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2380-4-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2380-0-0x000000007408E000-0x000000007408F000-memory.dmp

Filesize
4KB

Download
memory/2380-3-0x00000000002F0000-0x00000000002F6000-memory.dmp

Filesize
24KB

Download
memory/2380-19-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2380-2-0x00000000070A0000-0x00000000071A6000-memory.dmp

Filesize
1.0MB

Download
memory/2380-1-0x0000000001330000-0x000000000140C000-memory.dmp

Filesize
880KB

Download
memory/2400-9-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2400-7-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2400-5-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2400-15-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2400-17-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2400-20-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2604-28-0x00000000012D0000-0x00000000013AC000-memory.dmp

Filesize
880KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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