quasar | 79b2e8bd0d46901502869063962252c0b80b77ff909f1e497bf4c04ae2f0ec71

Resubmissions

09-01-2025 16:12

250109-tnzlwawmel 10

09-01-2025 16:08

250109-tlcpbswlhj 10

09-01-2025 16:04

250109-th4zeawldl 10

Analysis

max time kernel
209s
max time network
211s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
09-01-2025 16:08

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Reason

Machine shutdown

Report Analysis Logs

General

Target

ddnstest.exe
Size

3.1MB
MD5

0b301a943083061bb0e95c688ad02dcf
SHA1

b26d04fcad24a618a422ae156774218d42538d88
SHA256

79b2e8bd0d46901502869063962252c0b80b77ff909f1e497bf4c04ae2f0ec71
SHA512

58e8fa3c6dd985d89fa2cd6a6f91ce87929165cee9d85b0fb1cbb70cfb33053567a333464da804ee7cee80f33bb5b065de4817812b114b9c7dbe5ef60e6ab923
SSDEEP

49152:avyI22SsaNYfdPBldt698dBcjHF2tjmzeEoGdzTHHB72eh2NT:avf22SsaNYfdPBldt6+dBcjHF2te

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

hiimbob.ddnsking.com:9112

Mutex

91f1b164-f669-47a1-b3ec-59976d66b33a

Attributes

encryption_key
FD9ED3A6AE6574CE5C854385C6AC2FC432580344
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
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
behavioral4/memory/860-1-0x0000000000420000-0x0000000000744000-memory.dmp	family_quasar

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 (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = 99ebff004cc2ff000091f8000078d4000067c000003e9200001a6800f7630c00	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365268"	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\ColorizationAfterglow = "3288365268"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1"	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 = "4290799360"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "183"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292114432"	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\Explorer\Accent\AccentColorMenu = "4292114432"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	LogonUI.exe

Modifies registry class 3 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\Cookies\CachePrefix = "Cookie:"	BackgroundTransferHost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\History\CachePrefix = "Visited:"	BackgroundTransferHost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\Content\CachePrefix	BackgroundTransferHost.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	860	ddnstest.exe
Token: SeShutdownPrivilege	5044	shutdown.exe
Token: SeRemoteShutdownPrivilege	5044	shutdown.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
860	ddnstest.exe
860	ddnstest.exe
860	ddnstest.exe
860	ddnstest.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
860	ddnstest.exe
860	ddnstest.exe
860	ddnstest.exe
860	ddnstest.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
860	ddnstest.exe
4820	LogonUI.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 860 wrote to memory of 5044	860	ddnstest.exe	81
PID 860 wrote to memory of 5044	860	ddnstest.exe	81

C:\Users\Admin\AppData\Local\Temp\ddnstest.exe
"C:\Users\Admin\AppData\Local\Temp\ddnstest.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:860
- C:\Windows\System32\shutdown.exe
  "C:\Windows\System32\shutdown.exe" /s /t 0
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:5044

C:\Windows\system32\BackgroundTransferHost.exe
"BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.13
1⤵
- Modifies registry class
PID:3344

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa39ce055 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:4820

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/860-0-0x00007FF9EA4C3000-0x00007FF9EA4C5000-memory.dmp

Filesize
8KB

Download
memory/860-1-0x0000000000420000-0x0000000000744000-memory.dmp

Filesize
3.1MB

Download
memory/860-2-0x00007FF9EA4C0000-0x00007FF9EAF82000-memory.dmp

Filesize
10.8MB

Download
memory/860-3-0x000000001BEA0000-0x000000001BEF0000-memory.dmp

Filesize
320KB

Download
memory/860-4-0x000000001BFB0000-0x000000001C062000-memory.dmp

Filesize
712KB

Download
memory/860-7-0x000000001BF40000-0x000000001BF52000-memory.dmp

Filesize
72KB

Download
memory/860-8-0x000000001CAC0000-0x000000001CAFC000-memory.dmp

Filesize
240KB

Download
memory/860-9-0x00007FF9EA4C3000-0x00007FF9EA4C5000-memory.dmp

Filesize
8KB

Download
memory/860-10-0x00007FF9EA4C0000-0x00007FF9EAF82000-memory.dmp

Filesize
10.8MB

Download
memory/860-12-0x00007FF9EA4C0000-0x00007FF9EAF82000-memory.dmp

Filesize
10.8MB

Download