quasar | 12dc2f09f5cb5160771e12b5128de26fde6bab70cee6d063859eea955df1216c

General

Target

srxchost.exe
Size

409KB
MD5

3646d83b4b68c7a7de0c4cb99c6550c9
SHA1

1f84405a3a18a24d58eb62a13dd1cfe5c4b6d3d1
SHA256

12dc2f09f5cb5160771e12b5128de26fde6bab70cee6d063859eea955df1216c
SHA512

707b7b35f9504fa4b18ca1175e010771e67c3096b2d7552dc03c0bfb1bb377bfe360e2b49ce3ebc1408b6fac9838e5b8af26721650e8b5823969a12501fb0107
SSDEEP

12288:9piREGJiVp4B6eODSwejGz1VIudSJRZfwmJweOJsn:TwpJj8Nd+RZImJf

Score

10^/10

quasar seroxen | v3.1.5 |spyware trojan

Malware Config

Extracted

Family

quasar

Version

3.1.5

Botnet

SeroXen | v3.1.5 |

C2

dating-mpegs.gl.at.ply.gg:6566

Mutex

$Sxr-jy6vh8CtEJL5ceZuIb

Attributes

encryption_key
RtxBjTfEK9dH2O6DfNVH
install_name
$sxr-powershell.exe
log_directory
$sxr-Logs
reconnect_delay
3000
startup_key
Powershell
subdirectory
$sxr-seroxen2

Signatures

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

Quasar payload 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/992-1-0x0000000000160000-0x00000000001CC000-memory.dmp	family_quasar
\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe	family_quasar
behavioral2/memory/2652-10-0x0000000000EA0000-0x0000000000F0C000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

$sxr-powershell.exe

pid process

2652 $sxr-powershell.exe
Loads dropped DLL 1 IoCs

Processes:

srxchost.exe

pid process

992 srxchost.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

2 ip-api.com

pid	process
2652	$sxr-powershell.exe

pid	process
992	srxchost.exe

flow	ioc
2	ip-api.com

Drops file in System32 directory 4 IoCs

Processes:

srxchost.exe$sxr-powershell.exe

description	ioc	process
File created	C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe	srxchost.exe
File opened for modification	C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe	srxchost.exe
File opened for modification	C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe	$sxr-powershell.exe
File opened for modification	C:\Windows\SysWOW64\$sxr-seroxen2	$sxr-powershell.exe

Creates scheduled task(s) 1 TTPs 4 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exeschtasks.exeSCHTASKS.exeSCHTASKS.exe

pid process

2808 schtasks.exe
2536 schtasks.exe
2584 SCHTASKS.exe
488 SCHTASKS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

srxchost.exe$sxr-powershell.exe

description pid process

Token: SeDebugPrivilege 992 srxchost.exe
Token: SeDebugPrivilege 2652 $sxr-powershell.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

$sxr-powershell.exe

pid process

2652 $sxr-powershell.exe

pid	process
2808	schtasks.exe
2536	schtasks.exe
2584	SCHTASKS.exe
488	SCHTASKS.exe

description	pid	process
Token: SeDebugPrivilege	992	srxchost.exe
Token: SeDebugPrivilege	2652	$sxr-powershell.exe

pid	process
2652	$sxr-powershell.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

srxchost.exe$sxr-powershell.exe

description	pid	process	target process
PID 992 wrote to memory of 2808	992	srxchost.exe	schtasks.exe
PID 992 wrote to memory of 2808	992	srxchost.exe	schtasks.exe
PID 992 wrote to memory of 2808	992	srxchost.exe	schtasks.exe
PID 992 wrote to memory of 2808	992	srxchost.exe	schtasks.exe
PID 992 wrote to memory of 2652	992	srxchost.exe	$sxr-powershell.exe
PID 992 wrote to memory of 2652	992	srxchost.exe	$sxr-powershell.exe
PID 992 wrote to memory of 2652	992	srxchost.exe	$sxr-powershell.exe
PID 992 wrote to memory of 2652	992	srxchost.exe	$sxr-powershell.exe
PID 992 wrote to memory of 2652	992	srxchost.exe	$sxr-powershell.exe
PID 992 wrote to memory of 2652	992	srxchost.exe	$sxr-powershell.exe
PID 992 wrote to memory of 2652	992	srxchost.exe	$sxr-powershell.exe
PID 2652 wrote to memory of 2536	2652	$sxr-powershell.exe	schtasks.exe
PID 2652 wrote to memory of 2536	2652	$sxr-powershell.exe	schtasks.exe
PID 2652 wrote to memory of 2536	2652	$sxr-powershell.exe	schtasks.exe
PID 2652 wrote to memory of 2536	2652	$sxr-powershell.exe	schtasks.exe
PID 992 wrote to memory of 2584	992	srxchost.exe	SCHTASKS.exe
PID 992 wrote to memory of 2584	992	srxchost.exe	SCHTASKS.exe
PID 992 wrote to memory of 2584	992	srxchost.exe	SCHTASKS.exe
PID 992 wrote to memory of 2584	992	srxchost.exe	SCHTASKS.exe
PID 2652 wrote to memory of 488	2652	$sxr-powershell.exe	SCHTASKS.exe
PID 2652 wrote to memory of 488	2652	$sxr-powershell.exe	SCHTASKS.exe
PID 2652 wrote to memory of 488	2652	$sxr-powershell.exe	SCHTASKS.exe
PID 2652 wrote to memory of 488	2652	$sxr-powershell.exe	SCHTASKS.exe

C:\Users\Admin\AppData\Local\Temp\srxchost.exe
"C:\Users\Admin\AppData\Local\Temp\srxchost.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:992

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "Powershell" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\srxchost.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:2808

C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe
"C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe"
2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2652

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "Powershell" /sc ONLOGON /tr "C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:2536

C:\Windows\SysWOW64\SCHTASKS.exe
"SCHTASKS.exe" /create /tn "$77$sxr-powershell.exe" /tr "'C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe'" /sc onlogon /rl HIGHEST
3⤵
- Creates scheduled task(s)
PID:488

C:\Windows\SysWOW64\SCHTASKS.exe
"SCHTASKS.exe" /create /tn "$77srxchost.exe" /tr "'C:\Users\Admin\AppData\Local\Temp\srxchost.exe'" /sc onlogon /rl HIGHEST
2⤵
- Creates scheduled task(s)
PID:2584

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe

Filesize
409KB

MD5
3646d83b4b68c7a7de0c4cb99c6550c9

SHA1
1f84405a3a18a24d58eb62a13dd1cfe5c4b6d3d1

SHA256
12dc2f09f5cb5160771e12b5128de26fde6bab70cee6d063859eea955df1216c

SHA512
707b7b35f9504fa4b18ca1175e010771e67c3096b2d7552dc03c0bfb1bb377bfe360e2b49ce3ebc1408b6fac9838e5b8af26721650e8b5823969a12501fb0107

Download Submit
memory/992-0-0x00000000741FE000-0x00000000741FF000-memory.dmp

Filesize
4KB

Download
memory/992-1-0x0000000000160000-0x00000000001CC000-memory.dmp

Filesize
432KB

Download
memory/992-2-0x00000000741F0000-0x00000000748DE000-memory.dmp

Filesize
6.9MB

Download
memory/992-14-0x00000000741F0000-0x00000000748DE000-memory.dmp

Filesize
6.9MB

Download
memory/2652-10-0x0000000000EA0000-0x0000000000F0C000-memory.dmp

Filesize
432KB

Download
memory/2652-11-0x00000000741F0000-0x00000000748DE000-memory.dmp

Filesize
6.9MB

Download
memory/2652-12-0x00000000741F0000-0x00000000748DE000-memory.dmp

Filesize
6.9MB

Download
memory/2652-15-0x00000000741F0000-0x00000000748DE000-memory.dmp

Filesize
6.9MB

Download
memory/2652-16-0x00000000741F0000-0x00000000748DE000-memory.dmp

Filesize
6.9MB

Download
memory/2652-17-0x00000000741F0000-0x00000000748DE000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads