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 2 IoCs

Processes:

resource	yara_rule
behavioral3/memory/3444-1-0x0000000000F90000-0x0000000000FFC000-memory.dmp	family_quasar
C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

$sxr-powershell.exe

pid process

3940 $sxr-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

15 ip-api.com

pid	process
3940	$sxr-powershell.exe

flow	ioc
15	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 3 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exeSCHTASKS.exeschtasks.exe

pid process

1632 schtasks.exe
2780 SCHTASKS.exe
2436 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

srxchost.exe$sxr-powershell.exe

description pid process

Token: SeDebugPrivilege 3444 srxchost.exe
Token: SeDebugPrivilege 3940 $sxr-powershell.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

$sxr-powershell.exe

pid process

3940 $sxr-powershell.exe

pid	process
1632	schtasks.exe
2780	SCHTASKS.exe
2436	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	3444	srxchost.exe
Token: SeDebugPrivilege	3940	$sxr-powershell.exe

pid	process
3940	$sxr-powershell.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

srxchost.exe$sxr-powershell.exe

description	pid	process	target process
PID 3444 wrote to memory of 1632	3444	srxchost.exe	schtasks.exe
PID 3444 wrote to memory of 1632	3444	srxchost.exe	schtasks.exe
PID 3444 wrote to memory of 1632	3444	srxchost.exe	schtasks.exe
PID 3444 wrote to memory of 3940	3444	srxchost.exe	$sxr-powershell.exe
PID 3444 wrote to memory of 3940	3444	srxchost.exe	$sxr-powershell.exe
PID 3444 wrote to memory of 3940	3444	srxchost.exe	$sxr-powershell.exe
PID 3444 wrote to memory of 2780	3444	srxchost.exe	SCHTASKS.exe
PID 3444 wrote to memory of 2780	3444	srxchost.exe	SCHTASKS.exe
PID 3444 wrote to memory of 2780	3444	srxchost.exe	SCHTASKS.exe
PID 3940 wrote to memory of 2436	3940	$sxr-powershell.exe	schtasks.exe
PID 3940 wrote to memory of 2436	3940	$sxr-powershell.exe	schtasks.exe
PID 3940 wrote to memory of 2436	3940	$sxr-powershell.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\srxchost.exe
"C:\Users\Admin\AppData\Local\Temp\srxchost.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3444

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:1632

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:3940

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:2436

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:2780

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

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

Filesize
409KB

MD5
3646d83b4b68c7a7de0c4cb99c6550c9

SHA1
1f84405a3a18a24d58eb62a13dd1cfe5c4b6d3d1

SHA256
12dc2f09f5cb5160771e12b5128de26fde6bab70cee6d063859eea955df1216c

SHA512
707b7b35f9504fa4b18ca1175e010771e67c3096b2d7552dc03c0bfb1bb377bfe360e2b49ce3ebc1408b6fac9838e5b8af26721650e8b5823969a12501fb0107

Download Submit
memory/3444-6-0x0000000006710000-0x0000000006722000-memory.dmp

Filesize
72KB

Download
memory/3444-2-0x0000000005F00000-0x00000000064A4000-memory.dmp

Filesize
5.6MB

Download
memory/3444-3-0x0000000005A10000-0x0000000005AA2000-memory.dmp

Filesize
584KB

Download
memory/3444-4-0x0000000074E30000-0x00000000755E0000-memory.dmp

Filesize
7.7MB

Download
memory/3444-5-0x0000000005B00000-0x0000000005B66000-memory.dmp

Filesize
408KB

Download
memory/3444-0-0x0000000074E3E000-0x0000000074E3F000-memory.dmp

Filesize
4KB

Download
memory/3444-7-0x0000000006C50000-0x0000000006C8C000-memory.dmp

Filesize
240KB

Download
memory/3444-1-0x0000000000F90000-0x0000000000FFC000-memory.dmp

Filesize
432KB

Download
memory/3444-16-0x0000000074E30000-0x00000000755E0000-memory.dmp

Filesize
7.7MB

Download
memory/3940-13-0x0000000074E30000-0x00000000755E0000-memory.dmp

Filesize
7.7MB

Download
memory/3940-14-0x0000000074E30000-0x00000000755E0000-memory.dmp

Filesize
7.7MB

Download
memory/3940-18-0x0000000006EA0000-0x0000000006EAA000-memory.dmp

Filesize
40KB

Download
memory/3940-19-0x0000000074E30000-0x00000000755E0000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads