quasar | 6bc108ddb31a255fdd5d1e1047dcd81bc7d7e78c96f7afa9362cecbb0a5b3dbc

Reason

Machine shutdown

General

Target

Client-built.exe
Size

3.1MB
MD5

97cd39b10b06129cb419a72e1a1827b0
SHA1

d05b2d7cfdf8b12746ffc7a59be36634852390bd
SHA256

6bc108ddb31a255fdd5d1e1047dcd81bc7d7e78c96f7afa9362cecbb0a5b3dbc
SHA512

266d5c0eb0264b82d703d7b5dc22c9e040da239aaca1691f7e193f5391d7bafc441aff3529e42e84421cf80a8d5fca92c2b63019c3a475080744c7f100ea0233
SSDEEP

49152:Kv7I22SsaNYfdPBldt698dBcjH2CRJ6nbR3LoGdDyaTHHB72eh2NT:KvE22SsaNYfdPBldt6+dBcjH2CRJ65T

Score

10^/10

quasar romka spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

romka

C2

jozzu420-51305.portmap.host:51305

Mutex

0445c342-b551-411c-9b80-cd437437f491

Attributes

encryption_key
E1BF1D99459F04CAF668F054744BC2C514B0A3D6
install_name
Romilyaa.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows 10 Boot
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1688-1-0x0000000000E20000-0x0000000001144000-memory.dmp	family_quasar
C:\Program Files\SubDir\Romilyaa.exe	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

Processes:

Romilyaa.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	Romilyaa.exe

Executes dropped EXE 1 IoCs

Processes:

Romilyaa.exe

pid process

4648 Romilyaa.exe

pid	process
4648	Romilyaa.exe

Drops file in Program Files directory 2 IoCs

Processes:

Client-built.exe

description	ioc	process
File created	C:\Program Files\SubDir\Romilyaa.exe	Client-built.exe
File opened for modification	C:\Program Files\SubDir\Romilyaa.exe	Client-built.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

Processes:

schtasks.exeschtasks.exe

pid process

3292 schtasks.exe
4108 schtasks.exe

pid	process
3292	schtasks.exe
4108	schtasks.exe

Modifies data under HKEY_USERS 15 IoCs

Processes:

LogonUI.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "154"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	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 = "4292311040"	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\ColorizationAfterglowBalance = "10"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	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 (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00	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\DWM\ColorizationBlurBalance = "1"	LogonUI.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

Client-built.exeRomilyaa.exeshutdown.exe

description	pid	process
Token: SeDebugPrivilege	1688	Client-built.exe
Token: SeDebugPrivilege	4648	Romilyaa.exe
Token: SeShutdownPrivilege	3116	shutdown.exe
Token: SeRemoteShutdownPrivilege	3116	shutdown.exe

Suspicious use of FindShellTrayWindow 3 IoCs

Processes:

Romilyaa.exe

pid process

4648 Romilyaa.exe
4648 Romilyaa.exe
4648 Romilyaa.exe
Suspicious use of SendNotifyMessage 3 IoCs

Processes:

Romilyaa.exe

pid process

4648 Romilyaa.exe
4648 Romilyaa.exe
4648 Romilyaa.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

Romilyaa.exeLogonUI.exe

pid process

4648 Romilyaa.exe
4364 LogonUI.exe

pid	process
4648	Romilyaa.exe
4648	Romilyaa.exe
4648	Romilyaa.exe

pid	process
4648	Romilyaa.exe
4648	Romilyaa.exe
4648	Romilyaa.exe

pid	process
4648	Romilyaa.exe
4364	LogonUI.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

Client-built.exeRomilyaa.exe

description	pid	process	target process
PID 1688 wrote to memory of 3292	1688	Client-built.exe	schtasks.exe
PID 1688 wrote to memory of 3292	1688	Client-built.exe	schtasks.exe
PID 1688 wrote to memory of 4648	1688	Client-built.exe	Romilyaa.exe
PID 1688 wrote to memory of 4648	1688	Client-built.exe	Romilyaa.exe
PID 4648 wrote to memory of 4108	4648	Romilyaa.exe	schtasks.exe
PID 4648 wrote to memory of 4108	4648	Romilyaa.exe	schtasks.exe
PID 4648 wrote to memory of 3116	4648	Romilyaa.exe	shutdown.exe
PID 4648 wrote to memory of 3116	4648	Romilyaa.exe	shutdown.exe

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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1688

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Windows 10 Boot" /sc ONLOGON /tr "C:\Program Files\SubDir\Romilyaa.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:3292

C:\Program Files\SubDir\Romilyaa.exe
"C:\Program Files\SubDir\Romilyaa.exe"
2⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4648

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Windows 10 Boot" /sc ONLOGON /tr "C:\Program Files\SubDir\Romilyaa.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:4108

C:\Windows\System32\shutdown.exe
"C:\Windows\System32\shutdown.exe" /r /t 0
3⤵
- Suspicious use of AdjustPrivilegeToken
PID:3116

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa392b855 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:4364

Network

MITRE ATT&CK Matrix ATT&CK v13

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Program Files\SubDir\Romilyaa.exe
Filesize
3.1MB

MD5
97cd39b10b06129cb419a72e1a1827b0

SHA1
d05b2d7cfdf8b12746ffc7a59be36634852390bd

SHA256
6bc108ddb31a255fdd5d1e1047dcd81bc7d7e78c96f7afa9362cecbb0a5b3dbc

SHA512
266d5c0eb0264b82d703d7b5dc22c9e040da239aaca1691f7e193f5391d7bafc441aff3529e42e84421cf80a8d5fca92c2b63019c3a475080744c7f100ea0233

Download Submit
memory/1688-0-0x00007FFD6EE63000-0x00007FFD6EE65000-memory.dmp

Filesize
8KB

Download
memory/1688-1-0x0000000000E20000-0x0000000001144000-memory.dmp

Filesize
3.1MB

Download
memory/1688-2-0x00007FFD6EE60000-0x00007FFD6F921000-memory.dmp

Filesize
10.8MB

Download
memory/1688-8-0x00007FFD6EE60000-0x00007FFD6F921000-memory.dmp

Filesize
10.8MB

Download
memory/4648-10-0x00007FFD6EE60000-0x00007FFD6F921000-memory.dmp

Filesize
10.8MB

Download
memory/4648-9-0x00007FFD6EE60000-0x00007FFD6F921000-memory.dmp

Filesize
10.8MB

Download
memory/4648-11-0x000000001C8C0000-0x000000001C910000-memory.dmp

Filesize
320KB

Download
memory/4648-12-0x000000001C9D0000-0x000000001CA82000-memory.dmp

Filesize
712KB

Download
memory/4648-15-0x000000001C950000-0x000000001C962000-memory.dmp

Filesize
72KB

Download
memory/4648-16-0x000000001D1D0000-0x000000001D20C000-memory.dmp

Filesize
240KB

Download
memory/4648-17-0x00007FFD6EE60000-0x00007FFD6F921000-memory.dmp

Filesize
10.8MB

Download
memory/4648-19-0x00007FFD6EE60000-0x00007FFD6F921000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

Errors

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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