quasar | a0a5e205567c676b99f69c9d11723a9e44e073cb61ca1ef5b228b26cea57e856

Analysis

max time kernel
94s
max time network
140s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
19-11-2024 18:12

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General

Target

a0a5e205567c676b99f69c9d11723a9e44e073cb61ca1ef5b228b26cea57e856.exe
Size

1.4MB
MD5

142210eb7464fb579c0c6030c15c876f
SHA1

65050f9af307ec87745a32e1cc79dee28e8bc5ea
SHA256

a0a5e205567c676b99f69c9d11723a9e44e073cb61ca1ef5b228b26cea57e856
SHA512

4f82b7d3d6f8e49a0a4ef5a27e54d166cc4b4a9231442e46fee1d5ae85e16d779ef75a3bfeaa82d762976507b49ea91c8e2f9c2e80beb92c55759aa5f3721858
SSDEEP

12288:2fcOokxZ4FK9VlPprK7w5NljuDvdLwLEcXq8dxSaDygxpy3nZOJcllvB4:2P8FMhQiXhxkKcOUvi

Score

10^/10

quasar chim discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Chim

aboushagor.ydns.eu:6542

Mutex

0b30f45d-3c54-4926-a32f-8a1dc077eb21

Attributes

encryption_key
799E5C34BA6EC18D72E269D0C5CF1A5AC1AD9277
install_name
windows update.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

resource	yara_rule
behavioral2/memory/5068-1098-0x0000000000500000-0x0000000000824000-memory.dmp	family_quasar

Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs

description	pid	Process	procid_target
PID 916 created 3540	916	a0a5e205567c676b99f69c9d11723a9e44e073cb61ca1ef5b228b26cea57e856.exe	56

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\StackTrace.vbs	a0a5e205567c676b99f69c9d11723a9e44e073cb61ca1ef5b228b26cea57e856.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 916 set thread context of 5068	916	a0a5e205567c676b99f69c9d11723a9e44e073cb61ca1ef5b228b26cea57e856.exe	93

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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a0a5e205567c676b99f69c9d11723a9e44e073cb61ca1ef5b228b26cea57e856.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	InstallUtil.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.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

pid	Process
3600	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
916	a0a5e205567c676b99f69c9d11723a9e44e073cb61ca1ef5b228b26cea57e856.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	916	a0a5e205567c676b99f69c9d11723a9e44e073cb61ca1ef5b228b26cea57e856.exe
Token: SeDebugPrivilege	916	a0a5e205567c676b99f69c9d11723a9e44e073cb61ca1ef5b228b26cea57e856.exe
Token: SeDebugPrivilege	5068	InstallUtil.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 916 wrote to memory of 5068	916	a0a5e205567c676b99f69c9d11723a9e44e073cb61ca1ef5b228b26cea57e856.exe	93
PID 916 wrote to memory of 5068	916	a0a5e205567c676b99f69c9d11723a9e44e073cb61ca1ef5b228b26cea57e856.exe	93
PID 916 wrote to memory of 5068	916	a0a5e205567c676b99f69c9d11723a9e44e073cb61ca1ef5b228b26cea57e856.exe	93
PID 916 wrote to memory of 5068	916	a0a5e205567c676b99f69c9d11723a9e44e073cb61ca1ef5b228b26cea57e856.exe	93
PID 916 wrote to memory of 5068	916	a0a5e205567c676b99f69c9d11723a9e44e073cb61ca1ef5b228b26cea57e856.exe	93
PID 916 wrote to memory of 5068	916	a0a5e205567c676b99f69c9d11723a9e44e073cb61ca1ef5b228b26cea57e856.exe	93
PID 916 wrote to memory of 5068	916	a0a5e205567c676b99f69c9d11723a9e44e073cb61ca1ef5b228b26cea57e856.exe	93
PID 916 wrote to memory of 5068	916	a0a5e205567c676b99f69c9d11723a9e44e073cb61ca1ef5b228b26cea57e856.exe	93
PID 5068 wrote to memory of 3600	5068	InstallUtil.exe	94
PID 5068 wrote to memory of 3600	5068	InstallUtil.exe	94
PID 5068 wrote to memory of 3600	5068	InstallUtil.exe	94

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3540
- C:\Users\Admin\AppData\Local\Temp\a0a5e205567c676b99f69c9d11723a9e44e073cb61ca1ef5b228b26cea57e856.exe
  "C:\Users\Admin\AppData\Local\Temp\a0a5e205567c676b99f69c9d11723a9e44e073cb61ca1ef5b228b26cea57e856.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:916
- 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:5068
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\windows update.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3600

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/916-0-0x0000000074F7E000-0x0000000074F7F000-memory.dmp

Filesize
4KB

Download
memory/916-1-0x0000000000C60000-0x0000000000DD0000-memory.dmp

Filesize
1.4MB

Download
memory/916-2-0x0000000074F70000-0x0000000075720000-memory.dmp

Filesize
7.7MB

Download
memory/916-3-0x00000000058C0000-0x00000000058D0000-memory.dmp

Filesize
64KB

Download
memory/916-4-0x0000000074F7E000-0x0000000074F7F000-memory.dmp

Filesize
4KB

Download
memory/916-5-0x0000000074F70000-0x0000000075720000-memory.dmp

Filesize
7.7MB

Download
memory/916-6-0x0000000006C90000-0x0000000006E9C000-memory.dmp

Filesize
2.0MB

Download
memory/916-7-0x00000000074D0000-0x0000000007A74000-memory.dmp

Filesize
5.6MB

Download
memory/916-8-0x0000000007120000-0x00000000071B2000-memory.dmp

Filesize
584KB

Download
memory/916-9-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-12-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-26-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-34-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-50-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-52-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-48-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-46-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-44-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-42-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-40-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-38-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-36-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-32-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-30-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-28-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-24-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-22-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-20-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-18-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-16-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-10-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-14-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-54-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-62-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-72-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-70-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-68-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-66-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-64-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-60-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-58-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-56-0x0000000006C90000-0x0000000006E96000-memory.dmp

Filesize
2.0MB

Download
memory/916-1083-0x0000000074F70000-0x0000000075720000-memory.dmp

Filesize
7.7MB

Download
memory/916-1085-0x0000000006EA0000-0x0000000006EEC000-memory.dmp

Filesize
304KB

Download
memory/916-1084-0x00000000071D0000-0x000000000734E000-memory.dmp

Filesize
1.5MB

Download
memory/916-1089-0x0000000074F70000-0x0000000075720000-memory.dmp

Filesize
7.7MB

Download
memory/916-1091-0x0000000074F70000-0x0000000075720000-memory.dmp

Filesize
7.7MB

Download
memory/916-1090-0x0000000074F70000-0x0000000075720000-memory.dmp

Filesize
7.7MB

Download
memory/916-1092-0x00000000070D0000-0x0000000007124000-memory.dmp

Filesize
336KB

Download
memory/916-1097-0x0000000074F70000-0x0000000075720000-memory.dmp

Filesize
7.7MB

Download
memory/5068-1096-0x0000000074F70000-0x0000000075720000-memory.dmp

Filesize
7.7MB

Download
memory/5068-1098-0x0000000000500000-0x0000000000824000-memory.dmp

Filesize
3.1MB

Download
memory/5068-1099-0x0000000074F70000-0x0000000075720000-memory.dmp

Filesize
7.7MB

Download
memory/5068-1100-0x0000000004D40000-0x0000000004D4A000-memory.dmp

Filesize
40KB

Download
memory/5068-1101-0x0000000006070000-0x0000000006688000-memory.dmp

Filesize
6.1MB

Download
memory/5068-1102-0x0000000005B80000-0x0000000005BD0000-memory.dmp

Filesize
320KB

Download
memory/5068-1103-0x0000000005DF0000-0x0000000005EA2000-memory.dmp

Filesize
712KB

Download
memory/5068-1106-0x0000000006E70000-0x0000000006E82000-memory.dmp

Filesize
72KB

Download
memory/5068-1107-0x0000000006ED0000-0x0000000006F0C000-memory.dmp

Filesize
240KB

Download
memory/5068-1108-0x0000000006F80000-0x0000000006FE6000-memory.dmp

Filesize
408KB

Download
memory/5068-1109-0x0000000074F70000-0x0000000075720000-memory.dmp

Filesize
7.7MB

Download