quasar | de6b367a4b3a81fea07cdaa9406b9b70a994581cfae539f5da441268e4be4188

Analysis

max time kernel
95s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
03-12-2024 13:10

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General

Target

RFQ 9-XTC-204-60THD.xlsx.exe
Size

143KB
MD5

c9951fb84a416c1f329b39b2da482348
SHA1

e250949b96260df94f7c4cce9ef009069690ffe6
SHA256

de6b367a4b3a81fea07cdaa9406b9b70a994581cfae539f5da441268e4be4188
SHA512

1e450fc3fff15facd76ce9ac643e2e0ef2ffad6e18ba54dd70f93968fc984d14f81f8429409ddf25320a2d80df6e240367b2dd49e4793acad2460c158e62c556
SSDEEP

3072:IODxM5DNveAHHY+axlCTo0JLsLbJo9LdtxAuAqdES0m5kJ8QvT5+hM94K2icI7y:IO9M5DNveAHHY+clCU0JLsLb+9LdtxAN

Score

10^/10

quasar chi discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

chi

ert43w221.ydns.eu:6298

Mutex

a9116a3c-c75d-46ba-83b2-70c9a140159e

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/4964-1201-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs

Processes:

RFQ 9-XTC-204-60THD.xlsx.exe

description	pid	Process	procid_target
PID 2868 created 3404	2868	RFQ 9-XTC-204-60THD.xlsx.exe	56

Drops startup file 1 IoCs

Processes:

RFQ 9-XTC-204-60THD.xlsx.exe

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\RealErrorObject.vbs	RFQ 9-XTC-204-60THD.xlsx.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

RFQ 9-XTC-204-60THD.xlsx.exe

description	pid	Process	procid_target
PID 2868 set thread context of 4964	2868	RFQ 9-XTC-204-60THD.xlsx.exe	99

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.exeRFQ 9-XTC-204-60THD.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	RFQ 9-XTC-204-60THD.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
3900	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

RFQ 9-XTC-204-60THD.xlsx.exe

pid	Process
2868	RFQ 9-XTC-204-60THD.xlsx.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

RFQ 9-XTC-204-60THD.xlsx.exeInstallUtil.exe

description	pid	Process
Token: SeDebugPrivilege	2868	RFQ 9-XTC-204-60THD.xlsx.exe
Token: SeDebugPrivilege	2868	RFQ 9-XTC-204-60THD.xlsx.exe
Token: SeDebugPrivilege	4964	InstallUtil.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

RFQ 9-XTC-204-60THD.xlsx.exeInstallUtil.exe

description	pid	Process	procid_target
PID 2868 wrote to memory of 4964	2868	RFQ 9-XTC-204-60THD.xlsx.exe	99
PID 2868 wrote to memory of 4964	2868	RFQ 9-XTC-204-60THD.xlsx.exe	99
PID 2868 wrote to memory of 4964	2868	RFQ 9-XTC-204-60THD.xlsx.exe	99
PID 2868 wrote to memory of 4964	2868	RFQ 9-XTC-204-60THD.xlsx.exe	99
PID 2868 wrote to memory of 4964	2868	RFQ 9-XTC-204-60THD.xlsx.exe	99
PID 2868 wrote to memory of 4964	2868	RFQ 9-XTC-204-60THD.xlsx.exe	99
PID 2868 wrote to memory of 4964	2868	RFQ 9-XTC-204-60THD.xlsx.exe	99
PID 2868 wrote to memory of 4964	2868	RFQ 9-XTC-204-60THD.xlsx.exe	99
PID 4964 wrote to memory of 3900	4964	InstallUtil.exe	100
PID 4964 wrote to memory of 3900	4964	InstallUtil.exe	100
PID 4964 wrote to memory of 3900	4964	InstallUtil.exe	100

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3404
- C:\Users\Admin\AppData\Local\Temp\RFQ 9-XTC-204-60THD.xlsx.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ 9-XTC-204-60THD.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:2868
- 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:4964
- - 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:3900

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/2868-0-0x00000000745BE000-0x00000000745BF000-memory.dmp

Filesize
4KB

Download
memory/2868-1-0x00000000000E0000-0x000000000010A000-memory.dmp

Filesize
168KB

Download
memory/2868-2-0x0000000005070000-0x0000000005614000-memory.dmp

Filesize
5.6MB

Download
memory/2868-3-0x0000000004B60000-0x0000000004BF2000-memory.dmp

Filesize
584KB

Download
memory/2868-4-0x00000000745B0000-0x0000000074D60000-memory.dmp

Filesize
7.7MB

Download
memory/2868-5-0x0000000004B20000-0x0000000004B2A000-memory.dmp

Filesize
40KB

Download
memory/2868-6-0x00000000066F0000-0x00000000068FE000-memory.dmp

Filesize
2.1MB

Download
memory/2868-12-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-7-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-24-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-36-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-44-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-66-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-70-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-64-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-62-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-58-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-56-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-54-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-52-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-50-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-48-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-46-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-42-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-68-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-60-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-38-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-40-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-34-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-32-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-30-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-26-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-22-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-20-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-18-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-16-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-14-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-10-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-8-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-28-0x00000000066F0000-0x00000000068F8000-memory.dmp

Filesize
2.0MB

Download
memory/2868-1183-0x00000000745B0000-0x0000000074D60000-memory.dmp

Filesize
7.7MB

Download
memory/2868-1184-0x0000000006C40000-0x0000000006DBE000-memory.dmp

Filesize
1.5MB

Download
memory/2868-1185-0x0000000006B40000-0x0000000006B8C000-memory.dmp

Filesize
304KB

Download
memory/2868-1186-0x00000000745BE000-0x00000000745BF000-memory.dmp

Filesize
4KB

Download
memory/2868-1187-0x00000000745B0000-0x0000000074D60000-memory.dmp

Filesize
7.7MB

Download
memory/2868-1188-0x00000000745B0000-0x0000000074D60000-memory.dmp

Filesize
7.7MB

Download
memory/2868-1189-0x0000000002410000-0x0000000002464000-memory.dmp

Filesize
336KB

Download
memory/2868-1195-0x00000000745B0000-0x0000000074D60000-memory.dmp

Filesize
7.7MB

Download
memory/2868-1198-0x00000000745B0000-0x0000000074D60000-memory.dmp

Filesize
7.7MB

Download
memory/2868-1199-0x00000000745B0000-0x0000000074D60000-memory.dmp

Filesize
7.7MB

Download
memory/2868-1200-0x00000000745B0000-0x0000000074D60000-memory.dmp

Filesize
7.7MB

Download
memory/4964-1201-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/4964-1202-0x00000000745B0000-0x0000000074D60000-memory.dmp

Filesize
7.7MB

Download
memory/4964-1203-0x00000000745B0000-0x0000000074D60000-memory.dmp

Filesize
7.7MB

Download
memory/4964-1204-0x0000000006790000-0x0000000006DA8000-memory.dmp

Filesize
6.1MB

Download
memory/4964-1205-0x0000000006320000-0x0000000006370000-memory.dmp

Filesize
320KB

Download
memory/4964-1206-0x0000000006590000-0x0000000006642000-memory.dmp

Filesize
712KB

Download
memory/4964-1207-0x00000000075F0000-0x0000000007602000-memory.dmp

Filesize
72KB

Download
memory/4964-1208-0x0000000007650000-0x000000000768C000-memory.dmp

Filesize
240KB

Download
memory/4964-1209-0x0000000007700000-0x0000000007766000-memory.dmp

Filesize
408KB

Download
memory/4964-1210-0x00000000745B0000-0x0000000074D60000-memory.dmp

Filesize
7.7MB

Download