quasar | 33aab91831bba3a5fea7f49da16d5506254d66377d3074ff9457af4220be670e

Analysis

max time kernel
94s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
01-01-2025 02:20

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General

Target

33aab91831bba3a5fea7f49da16d5506254d66377d3074ff9457af4220be670e.exe
Size

3.2MB
MD5

64037f2d91fe82b3cf5300d6fa6d21c3
SHA1

61c8649b92fc06db644616af549ff5513f0f0a6d
SHA256

33aab91831bba3a5fea7f49da16d5506254d66377d3074ff9457af4220be670e
SHA512

2a70ef0c4d3a2237175078f0e84cd35d7d595422c3aa5219d6f0fe876f82cf60e1d4f592a58f166cf8175c52d275c21950c5ea421416fee8877dfaec5b9be008
SSDEEP

49152:Kvkt62XlaSFNWPjljiFa2RoUYISyMDJERHWk/OgRoGduATHHB72eh2NT8:Kv462XlaSFNWPjljiFXRoUYILMDZq+q

Score

10^/10

quasar helper atanka spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Helper Atanka

193.203.238.136:8080

Mutex

14f39659-ca5b-4af7-8045-bed3500c385f

Attributes

encryption_key
11049F2AEBDCF8E3A57474CD5FBA40FB2FFC5424
install_name
diskutil.exe
log_directory
Logs
reconnect_delay
3000
startup_key
diskutil
subdirectory
diskutil

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/5036-1-0x00000000001E0000-0x0000000000512000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023cab-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2444	diskutil.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
1936	schtasks.exe
3080	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5036	33aab91831bba3a5fea7f49da16d5506254d66377d3074ff9457af4220be670e.exe
Token: SeDebugPrivilege	2444	diskutil.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2444	diskutil.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5036 wrote to memory of 1936	5036	33aab91831bba3a5fea7f49da16d5506254d66377d3074ff9457af4220be670e.exe	83
PID 5036 wrote to memory of 1936	5036	33aab91831bba3a5fea7f49da16d5506254d66377d3074ff9457af4220be670e.exe	83
PID 5036 wrote to memory of 2444	5036	33aab91831bba3a5fea7f49da16d5506254d66377d3074ff9457af4220be670e.exe	85
PID 5036 wrote to memory of 2444	5036	33aab91831bba3a5fea7f49da16d5506254d66377d3074ff9457af4220be670e.exe	85
PID 2444 wrote to memory of 3080	2444	diskutil.exe	86
PID 2444 wrote to memory of 3080	2444	diskutil.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\33aab91831bba3a5fea7f49da16d5506254d66377d3074ff9457af4220be670e.exe
"C:\Users\Admin\AppData\Local\Temp\33aab91831bba3a5fea7f49da16d5506254d66377d3074ff9457af4220be670e.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5036
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "diskutil" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\diskutil\diskutil.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1936
- C:\Users\Admin\AppData\Roaming\diskutil\diskutil.exe
  "C:\Users\Admin\AppData\Roaming\diskutil\diskutil.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2444
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "diskutil" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\diskutil\diskutil.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3080

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\Roaming\diskutil\diskutil.exe

Filesize
3.2MB

MD5
64037f2d91fe82b3cf5300d6fa6d21c3

SHA1
61c8649b92fc06db644616af549ff5513f0f0a6d

SHA256
33aab91831bba3a5fea7f49da16d5506254d66377d3074ff9457af4220be670e

SHA512
2a70ef0c4d3a2237175078f0e84cd35d7d595422c3aa5219d6f0fe876f82cf60e1d4f592a58f166cf8175c52d275c21950c5ea421416fee8877dfaec5b9be008

Download Submit
memory/2444-10-0x00007FFC50C40000-0x00007FFC51701000-memory.dmp

Filesize
10.8MB

Download
memory/2444-11-0x00007FFC50C40000-0x00007FFC51701000-memory.dmp

Filesize
10.8MB

Download
memory/2444-12-0x000000001C430000-0x000000001C480000-memory.dmp

Filesize
320KB

Download
memory/2444-13-0x000000001C540000-0x000000001C5F2000-memory.dmp

Filesize
712KB

Download
memory/2444-16-0x000000001C4B0000-0x000000001C4C2000-memory.dmp

Filesize
72KB

Download
memory/2444-17-0x000000001CC40000-0x000000001CC7C000-memory.dmp

Filesize
240KB

Download
memory/2444-18-0x00007FFC50C40000-0x00007FFC51701000-memory.dmp

Filesize
10.8MB

Download
memory/5036-0-0x00007FFC50C43000-0x00007FFC50C45000-memory.dmp

Filesize
8KB

Download
memory/5036-1-0x00000000001E0000-0x0000000000512000-memory.dmp

Filesize
3.2MB

Download
memory/5036-2-0x00007FFC50C40000-0x00007FFC51701000-memory.dmp

Filesize
10.8MB

Download
memory/5036-9-0x00007FFC50C40000-0x00007FFC51701000-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