quasar | 22445a645229adce8803c92dbd9fe58beb3e50115352696e1adbab4dbcef0828

Reason

Machine shutdown

General

Target

Synapse Launcher.exe
Size

3.2MB
MD5

e2714f403955519640abda3d9994ab49
SHA1

2f49f53f4c8b84440690a3e930920c56131d7008
SHA256

22445a645229adce8803c92dbd9fe58beb3e50115352696e1adbab4dbcef0828
SHA512

3efc0da405999d7b8a0bdf682a5bf179477d31e34823f8d7c9e19da44801481cbcc151f4d39a40e323f4fc087a0fc068eeff216c2d227fa1b5747394d4112cea
SSDEEP

49152:Qv3I22SsaNYfdPBldt698dBcjHurHArgoGdDTHHB72eh2NTz:Qv422SsaNYfdPBldt6+dBcjHurHAs

Score

10^/10

quasar synapsex spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

SynapseX

C2

espiny-38468.portmap.host:38468

Mutex

987e6177-8b62-48ea-8ca9-c699971b74ba

Attributes

encryption_key
C7EC88A5CCB59BD73EF3F7D4787818BE89C06664
install_name
Boot 10.5.exe
log_directory
Windows Logs
reconnect_delay
3000
startup_key
Windows 10 Boot
subdirectory
Windows 10 Boot

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral1/memory/1416-1-0x0000000000690000-0x00000000009D0000-memory.dmp	family_quasar
behavioral1/files/0x000800000001ac45-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2256	Boot 10.5.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\system32\Windows 10 Boot\Boot 10.5.exe	Synapse Launcher.exe
File opened for modification	C:\Windows\system32\Windows 10 Boot\Boot 10.5.exe	Synapse Launcher.exe
File opened for modification	C:\Windows\system32\Windows 10 Boot	Synapse Launcher.exe
File opened for modification	C:\Windows\system32\Windows 10 Boot\Boot 10.5.exe	Boot 10.5.exe
File opened for modification	C:\Windows\system32\Windows 10 Boot	Boot 10.5.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
4856	schtasks.exe
4924	schtasks.exe

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
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\AccentColorMenu = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271"	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\ColorizationAfterglowBalance = "10"	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\StartColorMenu = "4288567808"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	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\AccentColor = "4292311040"	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\ColorizationBlurBalance = "1"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "1"	LogonUI.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1416	Synapse Launcher.exe
Token: SeDebugPrivilege	2256	Boot 10.5.exe
Token: SeShutdownPrivilege	2896	shutdown.exe
Token: SeRemoteShutdownPrivilege	2896	shutdown.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2136	LogonUI.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1416 wrote to memory of 4856	1416	Synapse Launcher.exe	73
PID 1416 wrote to memory of 4856	1416	Synapse Launcher.exe	73
PID 1416 wrote to memory of 2256	1416	Synapse Launcher.exe	75
PID 1416 wrote to memory of 2256	1416	Synapse Launcher.exe	75
PID 2256 wrote to memory of 4924	2256	Boot 10.5.exe	76
PID 2256 wrote to memory of 4924	2256	Boot 10.5.exe	76
PID 2256 wrote to memory of 2896	2256	Boot 10.5.exe	79
PID 2256 wrote to memory of 2896	2256	Boot 10.5.exe	79

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\Synapse Launcher.exe
"C:\Users\Admin\AppData\Local\Temp\Synapse Launcher.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1416
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Windows 10 Boot" /sc ONLOGON /tr "C:\Windows\system32\Windows 10 Boot\Boot 10.5.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:4856
- C:\Windows\system32\Windows 10 Boot\Boot 10.5.exe
  "C:\Windows\system32\Windows 10 Boot\Boot 10.5.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2256
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Windows 10 Boot" /sc ONLOGON /tr "C:\Windows\system32\Windows 10 Boot\Boot 10.5.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:4924
- - C:\Windows\System32\shutdown.exe
    "C:\Windows\System32\shutdown.exe" /s /t 0
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2896

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x0 /state0:0xa3aea055 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:2136

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\System32\Windows 10 Boot\Boot 10.5.exe

Filesize
3.2MB

MD5
e2714f403955519640abda3d9994ab49

SHA1
2f49f53f4c8b84440690a3e930920c56131d7008

SHA256
22445a645229adce8803c92dbd9fe58beb3e50115352696e1adbab4dbcef0828

SHA512
3efc0da405999d7b8a0bdf682a5bf179477d31e34823f8d7c9e19da44801481cbcc151f4d39a40e323f4fc087a0fc068eeff216c2d227fa1b5747394d4112cea

Download Submit
memory/1416-10-0x00007FFB35280000-0x00007FFB35C6C000-memory.dmp

Filesize
9.9MB

Download
memory/1416-1-0x0000000000690000-0x00000000009D0000-memory.dmp

Filesize
3.2MB

Download
memory/1416-2-0x00007FFB35280000-0x00007FFB35C6C000-memory.dmp

Filesize
9.9MB

Download
memory/1416-0-0x00007FFB35283000-0x00007FFB35284000-memory.dmp

Filesize
4KB

Download
memory/2256-11-0x00007FFB35280000-0x00007FFB35C6C000-memory.dmp

Filesize
9.9MB

Download
memory/2256-9-0x00007FFB35280000-0x00007FFB35C6C000-memory.dmp

Filesize
9.9MB

Download
memory/2256-12-0x000000001BD50000-0x000000001BDA0000-memory.dmp

Filesize
320KB

Download
memory/2256-13-0x000000001BE60000-0x000000001BF12000-memory.dmp

Filesize
712KB

Download
memory/2256-16-0x000000001BD30000-0x000000001BD42000-memory.dmp

Filesize
72KB

Download
memory/2256-17-0x000000001BDE0000-0x000000001BE1E000-memory.dmp

Filesize
248KB

Download
memory/2256-18-0x00007FFB35280000-0x00007FFB35C6C000-memory.dmp

Filesize
9.9MB

Download
memory/2256-19-0x00007FFB35280000-0x00007FFB35C6C000-memory.dmp

Filesize
9.9MB

Download
memory/2256-20-0x00007FFB35280000-0x00007FFB35C6C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

Errors

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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