quasar | 5d533976a3ac74eede22a42c2776ce3a392596b98c5ef0e6bed98b6395fb0c48

Analysis

max time kernel
37s
max time network
39s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
11-06-2024 17:13

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General

Target

$sxr-Uni.exe
Size

349KB
MD5

1ec86aa544089409730a3777da35c70a
SHA1

b592008ecc06d47bd7170f0ad3799e114139df0f
SHA256

5d533976a3ac74eede22a42c2776ce3a392596b98c5ef0e6bed98b6395fb0c48
SHA512

fbd7a000b74f0488039aa9213d56cf464b55629c9c649bde2835216f699f51f921d417d090e7e2e0d6e7c10a07c4b767ada82a8ac45fcfc10c950163f2df9715
SSDEEP

6144:ErL3HRsM+OFZHBcFU4EljaWbrqXMxxz5A8XklSoj:6VP+MXuCJayqXMr5mlSoj

Score

10^/10

quasar slave spyware trojan

Malware Config

Extracted

Family

quasar

Version

3.0.0

Botnet

Slave

runderscore00-63294.portmap.host:63294

Mutex

QSR_MUTEX_zImH6b2ccpa3QdeboZ

Attributes

encryption_key
Ep14qTjvhc0fuqxF9hv4
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

resource	yara_rule
behavioral1/memory/3328-1-0x0000000000530000-0x000000000058E000-memory.dmp	family_quasar
behavioral1/files/0x000800000001ac41-11.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4528	$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.

flow	ioc
1	ip-api.com

Creates scheduled task(s) 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
3932	schtasks.exe
1560	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3328	$sxr-Uni.exe
Token: SeDebugPrivilege	4528	$sxr-powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4528	$sxr-powershell.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3328 wrote to memory of 3932	3328	$sxr-Uni.exe	74
PID 3328 wrote to memory of 3932	3328	$sxr-Uni.exe	74
PID 3328 wrote to memory of 3932	3328	$sxr-Uni.exe	74
PID 3328 wrote to memory of 4528	3328	$sxr-Uni.exe	76
PID 3328 wrote to memory of 4528	3328	$sxr-Uni.exe	76
PID 3328 wrote to memory of 4528	3328	$sxr-Uni.exe	76
PID 4528 wrote to memory of 1560	4528	$sxr-powershell.exe	77
PID 4528 wrote to memory of 1560	4528	$sxr-powershell.exe	77
PID 4528 wrote to memory of 1560	4528	$sxr-powershell.exe	77

C:\Users\Admin\AppData\Local\Temp\$sxr-Uni.exe
"C:\Users\Admin\AppData\Local\Temp\$sxr-Uni.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3328
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Powershell" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\$sxr-Uni.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:3932
- C:\Users\Admin\AppData\Roaming\$sxr-seroxen2\$sxr-powershell.exe
  "C:\Users\Admin\AppData\Roaming\$sxr-seroxen2\$sxr-powershell.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4528
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Powershell" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\$sxr-seroxen2\$sxr-powershell.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:1560

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\$sxr-seroxen2\$sxr-powershell.exe

Filesize
349KB

MD5
1ec86aa544089409730a3777da35c70a

SHA1
b592008ecc06d47bd7170f0ad3799e114139df0f

SHA256
5d533976a3ac74eede22a42c2776ce3a392596b98c5ef0e6bed98b6395fb0c48

SHA512
fbd7a000b74f0488039aa9213d56cf464b55629c9c649bde2835216f699f51f921d417d090e7e2e0d6e7c10a07c4b767ada82a8ac45fcfc10c950163f2df9715

Download Submit
memory/3328-6-0x0000000005A70000-0x0000000005A82000-memory.dmp

Filesize
72KB

Download
memory/3328-1-0x0000000000530000-0x000000000058E000-memory.dmp

Filesize
376KB

Download
memory/3328-3-0x0000000004E70000-0x0000000004F02000-memory.dmp

Filesize
584KB

Download
memory/3328-4-0x00000000740B0000-0x000000007479E000-memory.dmp

Filesize
6.9MB

Download
memory/3328-5-0x0000000004F50000-0x0000000004FB6000-memory.dmp

Filesize
408KB

Download
memory/3328-0-0x00000000740BE000-0x00000000740BF000-memory.dmp

Filesize
4KB

Download
memory/3328-7-0x0000000005E60000-0x0000000005E9E000-memory.dmp

Filesize
248KB

Download
memory/3328-2-0x00000000052D0000-0x00000000057CE000-memory.dmp

Filesize
5.0MB

Download
memory/3328-14-0x00000000740B0000-0x000000007479E000-memory.dmp

Filesize
6.9MB

Download
memory/4528-15-0x00000000740B0000-0x000000007479E000-memory.dmp

Filesize
6.9MB

Download
memory/4528-16-0x00000000740B0000-0x000000007479E000-memory.dmp

Filesize
6.9MB

Download
memory/4528-18-0x0000000006450000-0x000000000645A000-memory.dmp

Filesize
40KB

Download
memory/4528-19-0x00000000740B0000-0x000000007479E000-memory.dmp

Filesize
6.9MB

Download
memory/4528-20-0x00000000740B0000-0x000000007479E000-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