quasar | 061f0c6e8d2aa06e218364b7d0f44e689d0c6b900a06844bf272efc516dabfdb

Analysis

max time kernel
149s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
17-12-2024 06:28

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General

Target

x.exe
Size

3.1MB
MD5

ce560e01aa6d0a1848eacb577880f112
SHA1

ac6013ab7dec397c0f14368492047e5f54091f2c
SHA256

061f0c6e8d2aa06e218364b7d0f44e689d0c6b900a06844bf272efc516dabfdb
SHA512

988a405ec7c257c43e21ac721509478113c48ae5cdbfe25d7f0227a6ff473412ba662343365d4ca899fc621b6710437128505f29cb6939f45248ff255c4565ec
SSDEEP

49152:GvUt62XlaSFNWPjljiFa2RoUYI1EF3mMnAfvAoGd5THHB72eh2NT:GvI62XlaSFNWPjljiFXRoUYI1K3L

Score

10^/10

quasar su-pc spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

su-pc

192.168.100.2:4444

Mutex

47a88def-94f4-406d-86f5-8b0b767128df

Attributes

encryption_key
6B74F0C858B7E90573D4E97997F2A082B9781250
install_name
x.exe
log_directory
Logs
reconnect_delay
3000
startup_key
x
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/4948-1-0x0000000000270000-0x0000000000594000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023cb6-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
5064	x.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\SubDir	x.exe
File created	C:\Windows\system32\SubDir\x.exe	x.exe
File opened for modification	C:\Windows\system32\SubDir\x.exe	x.exe
File opened for modification	C:\Windows\system32\SubDir	x.exe
File opened for modification	C:\Windows\system32\SubDir\x.exe	x.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
5084	schtasks.exe
2724	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4948	x.exe
Token: SeDebugPrivilege	5064	x.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5064	x.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4948 wrote to memory of 5084	4948	x.exe	83
PID 4948 wrote to memory of 5084	4948	x.exe	83
PID 4948 wrote to memory of 5064	4948	x.exe	85
PID 4948 wrote to memory of 5064	4948	x.exe	85
PID 5064 wrote to memory of 2724	5064	x.exe	86
PID 5064 wrote to memory of 2724	5064	x.exe	86

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\x.exe
"C:\Users\Admin\AppData\Local\Temp\x.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4948
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "x" /sc ONLOGON /tr "C:\Windows\system32\SubDir\x.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:5084
- C:\Windows\system32\SubDir\x.exe
  "C:\Windows\system32\SubDir\x.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:5064
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "x" /sc ONLOGON /tr "C:\Windows\system32\SubDir\x.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2724

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\x.exe.log

Filesize
1KB

MD5
baf55b95da4a601229647f25dad12878

SHA1
abc16954ebfd213733c4493fc1910164d825cac8

SHA256
ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924

SHA512
24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545

Download Submit
C:\Windows\System32\SubDir\x.exe

Filesize
3.1MB

MD5
ce560e01aa6d0a1848eacb577880f112

SHA1
ac6013ab7dec397c0f14368492047e5f54091f2c

SHA256
061f0c6e8d2aa06e218364b7d0f44e689d0c6b900a06844bf272efc516dabfdb

SHA512
988a405ec7c257c43e21ac721509478113c48ae5cdbfe25d7f0227a6ff473412ba662343365d4ca899fc621b6710437128505f29cb6939f45248ff255c4565ec

Download Submit
memory/4948-0-0x00007FFD4F463000-0x00007FFD4F465000-memory.dmp

Filesize
8KB

Download
memory/4948-1-0x0000000000270000-0x0000000000594000-memory.dmp

Filesize
3.1MB

Download
memory/4948-2-0x00007FFD4F460000-0x00007FFD4FF21000-memory.dmp

Filesize
10.8MB

Download
memory/4948-10-0x00007FFD4F460000-0x00007FFD4FF21000-memory.dmp

Filesize
10.8MB

Download
memory/5064-11-0x00007FFD4F460000-0x00007FFD4FF21000-memory.dmp

Filesize
10.8MB

Download
memory/5064-12-0x00007FFD4F460000-0x00007FFD4FF21000-memory.dmp

Filesize
10.8MB

Download
memory/5064-13-0x000000001C530000-0x000000001C580000-memory.dmp

Filesize
320KB

Download
memory/5064-14-0x000000001C640000-0x000000001C6F2000-memory.dmp

Filesize
712KB

Download
memory/5064-15-0x00007FFD4F460000-0x00007FFD4FF21000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads