quasar | 4f111d05ddb93bf8e4ec906d2705740790402254ee115982d9e5aae36c3b4ffe

Reason

Machine shutdown

General

Target

retard.exe
Size

3.1MB
MD5

b55e5489b45595fb38bf5bb30b69717b
SHA1

7511ee8909e0a0c53625eef4bd6b57250e561391
SHA256

4f111d05ddb93bf8e4ec906d2705740790402254ee115982d9e5aae36c3b4ffe
SHA512

40a520e89579a298922595428033b7f0ae0b8bd5bd6ead29488cad9707b153998ab88c3d55316045315297d185fefaaba49ef21b392ca216ac220e75220d1ead
SSDEEP

49152:6vxt62XlaSFNWPjljiFa2RoUYI4N83bR4LoGdzTHHB72eh2NT:6v762XlaSFNWPjljiFXRoUYI4N80

Score

10^/10

quasar afafaf spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

afafaf

C2

194.26.192.167:2768

Mutex

c1060262-cacc-4b5e-8e09-ac72d84cef52

Attributes

encryption_key
BE2B0B270E4DB19CAA5C42E9D2EBF64645A2D055
install_name
OneDrive.exe
log_directory
Logs
reconnect_delay
3000
startup_key
OneDrive
subdirectory
OneDrive

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/2672-1-0x0000000000B60000-0x0000000000E84000-memory.dmp	family_quasar

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	retard.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "232"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1"	LogonUI.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.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
4852	schtasks.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2672	retard.exe
Token: SeShutdownPrivilege	3700	shutdown.exe
Token: SeRemoteShutdownPrivilege	3700	shutdown.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2672	retard.exe
2908	LogonUI.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2672 wrote to memory of 4852	2672	retard.exe	83
PID 2672 wrote to memory of 4852	2672	retard.exe	83
PID 2672 wrote to memory of 3700	2672	retard.exe	102
PID 2672 wrote to memory of 3700	2672	retard.exe	102

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\retard.exe
"C:\Users\Admin\AppData\Local\Temp\retard.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2672
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "OneDrive" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\OneDrive\OneDrive.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4852
- C:\Windows\System32\shutdown.exe
  "C:\Windows\System32\shutdown.exe" /s /t 0
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3700

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:852

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa3927855 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:2908

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

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2672-0-0x00007FF8A8573000-0x00007FF8A8575000-memory.dmp

Filesize
8KB

Download
memory/2672-1-0x0000000000B60000-0x0000000000E84000-memory.dmp

Filesize
3.1MB

Download
memory/2672-2-0x00007FF8A8570000-0x00007FF8A9031000-memory.dmp

Filesize
10.8MB

Download
memory/2672-3-0x000000001C570000-0x000000001C5C0000-memory.dmp

Filesize
320KB

Download
memory/2672-4-0x000000001C680000-0x000000001C732000-memory.dmp

Filesize
712KB

Download
memory/2672-7-0x000000001C610000-0x000000001C622000-memory.dmp

Filesize
72KB

Download
memory/2672-8-0x000000001CE80000-0x000000001CEBC000-memory.dmp

Filesize
240KB

Download
memory/2672-9-0x00007FF8A8573000-0x00007FF8A8575000-memory.dmp

Filesize
8KB

Download
memory/2672-10-0x00007FF8A8570000-0x00007FF8A9031000-memory.dmp

Filesize
10.8MB

Download
memory/2672-12-0x00007FF8A8570000-0x00007FF8A9031000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

Errors

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads