quasar | 92db8e4b3d6b4d90a8959bd647f0b928e3cb98c5c4cb1e757b187baba1379f83

Analysis

max time kernel
96s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
25-11-2024 14:07

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General

Target

RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exe
Size

82KB
MD5

5405c36dca0a57d8a6632550b0cba212
SHA1

9f487e0902b7c39a4c4dd8dd9e918dc3dc10245c
SHA256

8d429a2e8f8b5403c44cb7597598c2ba18a40ccb464f2997426d3eefbbd888c0
SHA512

c699a965e289613d31f699494328f9570abc61ea437ab199afbb266c923c9383c366e3f4bec1de27614f2d9672de5449ee39e0d3614df3f315a2b64fad2e8e6b
SSDEEP

1536:eKPDl0ZVabbkg9ot5dR7GqPoS95sRvWQONAjzGX+:eKPDOZVEbkg6lKC0eBNAjzV

Score

10^/10

quasar chi discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

chi

ert43w221.ydns.eu:6298

Mutex

db1ec7b2-f77c-4b56-b5fd-a1430b0b26b9

Attributes

encryption_key
799E5C34BA6EC18D72E269D0C5CF1A5AC1AD9277
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
svchost
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2912-1200-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs

Processes:

RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exe

description pid process target process

PID 4328 created 3540 4328 RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exe Explorer.EXE

description	pid	process	target process
PID 4328 created 3540	4328	RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exe	Explorer.EXE

Drops startup file 1 IoCs

Processes:

RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\DebuggingFlags.vbs	RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exe

description	pid	process	target process
PID 4328 set thread context of 2912	4328	RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exe	InstallUtil.exe

System Location Discovery: System Language Discovery 1 TTPs 3 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

Processes:

schtasks.exeRFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exeInstallUtil.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	InstallUtil.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence execution

Scheduled Task
T1053.005

Processes:

schtasks.exe

pid process

1464 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exe

pid process

4328 RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exe

pid	process
1464	schtasks.exe

pid	process
4328	RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exeInstallUtil.exe

description	pid	process
Token: SeDebugPrivilege	4328	RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exe
Token: SeDebugPrivilege	4328	RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exe
Token: SeDebugPrivilege	2912	InstallUtil.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exeInstallUtil.exe

description	pid	process	target process
PID 4328 wrote to memory of 2912	4328	RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exe	InstallUtil.exe
PID 4328 wrote to memory of 2912	4328	RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exe	InstallUtil.exe
PID 4328 wrote to memory of 2912	4328	RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exe	InstallUtil.exe
PID 4328 wrote to memory of 2912	4328	RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exe	InstallUtil.exe
PID 4328 wrote to memory of 2912	4328	RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exe	InstallUtil.exe
PID 4328 wrote to memory of 2912	4328	RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exe	InstallUtil.exe
PID 4328 wrote to memory of 2912	4328	RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exe	InstallUtil.exe
PID 4328 wrote to memory of 2912	4328	RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exe	InstallUtil.exe
PID 2912 wrote to memory of 1464	2912	InstallUtil.exe	schtasks.exe
PID 2912 wrote to memory of 1464	2912	InstallUtil.exe	schtasks.exe
PID 2912 wrote to memory of 1464	2912	InstallUtil.exe	schtasks.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3540
- C:\Users\Admin\AppData\Local\Temp\RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ7-82927766783 WF242183 TRGR-989789引流管中性.xlsx.exe"
  2⤵
  - Suspicious use of NtCreateUserProcessOtherParentProcess
  - Drops startup file
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4328
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2912
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1464

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

Replay Monitor

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Downloads

memory/2912-1200-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2912-1199-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download
memory/2912-1201-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download
memory/2912-1202-0x0000000006640000-0x0000000006C58000-memory.dmp

Filesize
6.1MB

Download
memory/2912-1203-0x00000000061C0000-0x0000000006210000-memory.dmp

Filesize
320KB

Download
memory/2912-1210-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download
memory/2912-1209-0x00000000075D0000-0x0000000007636000-memory.dmp

Filesize
408KB

Download
memory/2912-1208-0x0000000007520000-0x000000000755C000-memory.dmp

Filesize
240KB

Download
memory/2912-1207-0x00000000074C0000-0x00000000074D2000-memory.dmp

Filesize
72KB

Download
memory/2912-1204-0x0000000006430000-0x00000000064E2000-memory.dmp

Filesize
712KB

Download
memory/4328-38-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-22-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-20-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-26-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-52-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-60-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-70-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-68-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-66-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-64-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-62-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-58-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-56-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-54-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-50-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-48-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-46-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-44-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-42-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-40-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-4-0x0000000004DB0000-0x0000000004DBA000-memory.dmp

Filesize
40KB

Download
memory/4328-34-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-32-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-30-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-24-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-6-0x0000000006930000-0x0000000006B3E000-memory.dmp

Filesize
2.1MB

Download
memory/4328-18-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-16-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-10-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-8-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-36-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-28-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-14-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-12-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-7-0x0000000006930000-0x0000000006B39000-memory.dmp

Filesize
2.0MB

Download
memory/4328-1183-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download
memory/4328-1184-0x0000000006E80000-0x0000000006FFE000-memory.dmp

Filesize
1.5MB

Download
memory/4328-1185-0x0000000006DB0000-0x0000000006DFC000-memory.dmp

Filesize
304KB

Download
memory/4328-1186-0x0000000006E00000-0x0000000006E54000-memory.dmp

Filesize
336KB

Download
memory/4328-1190-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download
memory/4328-5-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download
memory/4328-3-0x0000000004D00000-0x0000000004D92000-memory.dmp

Filesize
584KB

Download
memory/4328-2-0x00000000051C0000-0x0000000005764000-memory.dmp

Filesize
5.6MB

Download
memory/4328-1-0x0000000000300000-0x000000000031A000-memory.dmp

Filesize
104KB

Download
memory/4328-0-0x00000000748EE000-0x00000000748EF000-memory.dmp

Filesize
4KB

Download
memory/4328-1192-0x00000000748EE000-0x00000000748EF000-memory.dmp

Filesize
4KB

Download
memory/4328-1193-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download
memory/4328-1195-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download
memory/4328-1197-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download
memory/4328-1198-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download