quasar | 33aab91831bba3a5fea7f49da16d5506254d66377d3074ff9457af4220be670e

Analysis

max time kernel
126s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
31-12-2024 07:40

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General

Target

diskutil.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/3284-1-0x00000000007D0000-0x0000000000B02000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023c99-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4288	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
2344	schtasks.exe
4952	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3284	diskutil.exe
Token: SeDebugPrivilege	4288	diskutil.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4288	diskutil.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3284 wrote to memory of 2344	3284	diskutil.exe	82
PID 3284 wrote to memory of 2344	3284	diskutil.exe	82
PID 3284 wrote to memory of 4288	3284	diskutil.exe	84
PID 3284 wrote to memory of 4288	3284	diskutil.exe	84
PID 4288 wrote to memory of 4952	4288	diskutil.exe	85
PID 4288 wrote to memory of 4952	4288	diskutil.exe	85

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\diskutil.exe
"C:\Users\Admin\AppData\Local\Temp\diskutil.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3284
- 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:2344
- 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:4288
- - 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:4952

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\diskutil.exe.log

Filesize
1KB

MD5
baf55b95da4a601229647f25dad12878

SHA1
abc16954ebfd213733c4493fc1910164d825cac8

SHA256
ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924

SHA512
24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545

Download Submit
C:\Users\Admin\AppData\Roaming\diskutil\diskutil.exe

Filesize
3.2MB

MD5
64037f2d91fe82b3cf5300d6fa6d21c3

SHA1
61c8649b92fc06db644616af549ff5513f0f0a6d

SHA256
33aab91831bba3a5fea7f49da16d5506254d66377d3074ff9457af4220be670e

SHA512
2a70ef0c4d3a2237175078f0e84cd35d7d595422c3aa5219d6f0fe876f82cf60e1d4f592a58f166cf8175c52d275c21950c5ea421416fee8877dfaec5b9be008

Download Submit
memory/3284-0-0x00007FFE84C83000-0x00007FFE84C85000-memory.dmp

Filesize
8KB

Download
memory/3284-1-0x00000000007D0000-0x0000000000B02000-memory.dmp

Filesize
3.2MB

Download
memory/3284-2-0x00007FFE84C80000-0x00007FFE85741000-memory.dmp

Filesize
10.8MB

Download
memory/3284-10-0x00007FFE84C80000-0x00007FFE85741000-memory.dmp

Filesize
10.8MB

Download
memory/4288-11-0x00007FFE84C80000-0x00007FFE85741000-memory.dmp

Filesize
10.8MB

Download
memory/4288-12-0x00007FFE84C80000-0x00007FFE85741000-memory.dmp

Filesize
10.8MB

Download
memory/4288-13-0x000000001D180000-0x000000001D1D0000-memory.dmp

Filesize
320KB

Download
memory/4288-14-0x000000001D290000-0x000000001D342000-memory.dmp

Filesize
712KB

Download
memory/4288-15-0x00007FFE84C80000-0x00007FFE85741000-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