quasar | db5769a8780e6b398f48b33209ba18deb0eefeb0b6df143bb016c1defa718ac5

General

Target

cool.exe
Size

409KB
MD5

8981944139c803c067c3a1fe11dc0d88
SHA1

dcc102fba961eaea31a2c218b1f6e4ae2a00c91b
SHA256

db5769a8780e6b398f48b33209ba18deb0eefeb0b6df143bb016c1defa718ac5
SHA512

668cfa950624ee38e5e0470379b784e14675df4c0f8e75009d28161a88789d3d778a79924d379ab43896d028e94814d582a1c882c5d2918053a320a8e1cc38f5
SSDEEP

6144:rMs9p1kREG60ol2tjSujSyfhQkHwKkcY2b+5oydLJF6qty9fHg5a:jpiREGJBtjSujS1k8hoyM/9fHg5a

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

adult-mai.gl.at.ply.gg:51745

Mutex

$Sxr-jy6vh8CtEJL5ceZuIb

Attributes

encryption_key
72dhc0vkceueKRBldQr9
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
behavioral1/memory/3752-1-0x0000000000D90000-0x0000000000DFC000-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

4704 $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

8 ip-api.com

pid	process
4704	$sxr-powershell.exe

flow	ioc
8	ip-api.com

Drops file in System32 directory 4 IoCs

Processes:

cool.exe$sxr-powershell.exe

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

4908 schtasks.exe
5080 SCHTASKS.exe
1428 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

cool.exe$sxr-powershell.exe

description pid process

Token: SeDebugPrivilege 3752 cool.exe
Token: SeDebugPrivilege 4704 $sxr-powershell.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

$sxr-powershell.exe

pid process

4704 $sxr-powershell.exe

pid	process
4908	schtasks.exe
5080	SCHTASKS.exe
1428	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	3752	cool.exe
Token: SeDebugPrivilege	4704	$sxr-powershell.exe

pid	process
4704	$sxr-powershell.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

cool.exe$sxr-powershell.exe

description	pid	process	target process
PID 3752 wrote to memory of 4908	3752	cool.exe	schtasks.exe
PID 3752 wrote to memory of 4908	3752	cool.exe	schtasks.exe
PID 3752 wrote to memory of 4908	3752	cool.exe	schtasks.exe
PID 3752 wrote to memory of 4704	3752	cool.exe	$sxr-powershell.exe
PID 3752 wrote to memory of 4704	3752	cool.exe	$sxr-powershell.exe
PID 3752 wrote to memory of 4704	3752	cool.exe	$sxr-powershell.exe
PID 3752 wrote to memory of 5080	3752	cool.exe	SCHTASKS.exe
PID 3752 wrote to memory of 5080	3752	cool.exe	SCHTASKS.exe
PID 3752 wrote to memory of 5080	3752	cool.exe	SCHTASKS.exe
PID 4704 wrote to memory of 1428	4704	$sxr-powershell.exe	schtasks.exe
PID 4704 wrote to memory of 1428	4704	$sxr-powershell.exe	schtasks.exe
PID 4704 wrote to memory of 1428	4704	$sxr-powershell.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\cool.exe
"C:\Users\Admin\AppData\Local\Temp\cool.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3752

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "Powershell" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\cool.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:4908

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:4704

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:1428

C:\Windows\SysWOW64\SCHTASKS.exe
"SCHTASKS.exe" /create /tn "$77cool.exe" /tr "'C:\Users\Admin\AppData\Local\Temp\cool.exe'" /sc onlogon /rl HIGHEST
2⤵
- Creates scheduled task(s)
PID:5080

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:3716

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

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe
Filesize
409KB

MD5
8981944139c803c067c3a1fe11dc0d88

SHA1
dcc102fba961eaea31a2c218b1f6e4ae2a00c91b

SHA256
db5769a8780e6b398f48b33209ba18deb0eefeb0b6df143bb016c1defa718ac5

SHA512
668cfa950624ee38e5e0470379b784e14675df4c0f8e75009d28161a88789d3d778a79924d379ab43896d028e94814d582a1c882c5d2918053a320a8e1cc38f5

Download Submit
memory/3752-6-0x0000000006650000-0x0000000006662000-memory.dmp

Filesize
72KB

Download
memory/3752-1-0x0000000000D90000-0x0000000000DFC000-memory.dmp

Filesize
432KB

Download
memory/3752-3-0x0000000005880000-0x0000000005912000-memory.dmp

Filesize
584KB

Download
memory/3752-4-0x0000000074630000-0x0000000074DE0000-memory.dmp

Filesize
7.7MB

Download
memory/3752-5-0x0000000005800000-0x0000000005866000-memory.dmp

Filesize
408KB

Download
memory/3752-0-0x000000007463E000-0x000000007463F000-memory.dmp

Filesize
4KB

Download
memory/3752-7-0x0000000006B90000-0x0000000006BCC000-memory.dmp

Filesize
240KB

Download
memory/3752-2-0x0000000005E30000-0x00000000063D4000-memory.dmp

Filesize
5.6MB

Download
memory/3752-16-0x0000000074630000-0x0000000074DE0000-memory.dmp

Filesize
7.7MB

Download
memory/4704-14-0x0000000074630000-0x0000000074DE0000-memory.dmp

Filesize
7.7MB

Download
memory/4704-13-0x0000000074630000-0x0000000074DE0000-memory.dmp

Filesize
7.7MB

Download
memory/4704-18-0x0000000006B40000-0x0000000006B4A000-memory.dmp

Filesize
40KB

Download
memory/4704-21-0x0000000074630000-0x0000000074DE0000-memory.dmp

Filesize
7.7MB

Download
memory/4704-22-0x0000000074630000-0x0000000074DE0000-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