quasar | bb72088c6564bedd1c62d1819e6b6b6815e093f36560d7d3db0c6f4f58b2c9c8

Analysis

max time kernel
93s
max time network
106s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
16-01-2025 22:55

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General

Target

bb72088c6564bedd1c62d1819e6b6b6815e093f36560d7d3db0c6f4f58b2c9c8N.exe
Size

3.1MB
MD5

94848fcd4bf5aebebc8743d7fc61deb0
SHA1

29e05044af8bb2c017bd63c5c87812faf9c83e1f
SHA256

bb72088c6564bedd1c62d1819e6b6b6815e093f36560d7d3db0c6f4f58b2c9c8
SHA512

0fef5812657ba4545532cd004365b17b54934f778846586f7369327f4937b65c05f71cc7f2acf8d267eae74ed45bd596d31a5685ea5bbee557d8aca2ba703ea8
SSDEEP

49152:Ovtt62XlaSFNWPjljiFa2RoUYIcmRJ6DbR3LoGd8DTHHB72eh2NT:OvP62XlaSFNWPjljiFXRoUYIcmRJ61

Score

10^/10

quasar office06 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office06

154.216.19.77:7000

Mutex

1e8aec43-b30a-4c63-9211-c18c9decd0e0

Attributes

encryption_key
2A64449428B4580ED5FC6EE66024E26C725626BE
install_name
s.exe
log_directory
Logs
reconnect_delay
3000
startup_key
ssssss
subdirectory
dir

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/4780-1-0x00000000007D0000-0x0000000000AF4000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b92-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3468	s.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
1752	schtasks.exe
4420	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4780	bb72088c6564bedd1c62d1819e6b6b6815e093f36560d7d3db0c6f4f58b2c9c8N.exe
Token: SeDebugPrivilege	3468	s.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3468	s.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4780 wrote to memory of 1752	4780	bb72088c6564bedd1c62d1819e6b6b6815e093f36560d7d3db0c6f4f58b2c9c8N.exe	84
PID 4780 wrote to memory of 1752	4780	bb72088c6564bedd1c62d1819e6b6b6815e093f36560d7d3db0c6f4f58b2c9c8N.exe	84
PID 4780 wrote to memory of 3468	4780	bb72088c6564bedd1c62d1819e6b6b6815e093f36560d7d3db0c6f4f58b2c9c8N.exe	86
PID 4780 wrote to memory of 3468	4780	bb72088c6564bedd1c62d1819e6b6b6815e093f36560d7d3db0c6f4f58b2c9c8N.exe	86
PID 3468 wrote to memory of 4420	3468	s.exe	87
PID 3468 wrote to memory of 4420	3468	s.exe	87

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\bb72088c6564bedd1c62d1819e6b6b6815e093f36560d7d3db0c6f4f58b2c9c8N.exe
"C:\Users\Admin\AppData\Local\Temp\bb72088c6564bedd1c62d1819e6b6b6815e093f36560d7d3db0c6f4f58b2c9c8N.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4780
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "ssssss" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\dir\s.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1752
- C:\Users\Admin\AppData\Roaming\dir\s.exe
  "C:\Users\Admin\AppData\Roaming\dir\s.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3468
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "ssssss" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\dir\s.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4420

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\dir\s.exe

Filesize
3.1MB

MD5
94848fcd4bf5aebebc8743d7fc61deb0

SHA1
29e05044af8bb2c017bd63c5c87812faf9c83e1f

SHA256
bb72088c6564bedd1c62d1819e6b6b6815e093f36560d7d3db0c6f4f58b2c9c8

SHA512
0fef5812657ba4545532cd004365b17b54934f778846586f7369327f4937b65c05f71cc7f2acf8d267eae74ed45bd596d31a5685ea5bbee557d8aca2ba703ea8

Download Submit
memory/3468-8-0x00007FFE0C910000-0x00007FFE0D3D1000-memory.dmp

Filesize
10.8MB

Download
memory/3468-10-0x00007FFE0C910000-0x00007FFE0D3D1000-memory.dmp

Filesize
10.8MB

Download
memory/3468-11-0x000000001B7D0000-0x000000001B820000-memory.dmp

Filesize
320KB

Download
memory/3468-12-0x000000001D880000-0x000000001D932000-memory.dmp

Filesize
712KB

Download
memory/3468-15-0x000000001D7C0000-0x000000001D7D2000-memory.dmp

Filesize
72KB

Download
memory/3468-16-0x000000001D820000-0x000000001D85C000-memory.dmp

Filesize
240KB

Download
memory/3468-17-0x00007FFE0C910000-0x00007FFE0D3D1000-memory.dmp

Filesize
10.8MB

Download
memory/4780-0-0x00007FFE0C913000-0x00007FFE0C915000-memory.dmp

Filesize
8KB

Download
memory/4780-1-0x00000000007D0000-0x0000000000AF4000-memory.dmp

Filesize
3.1MB

Download
memory/4780-2-0x00007FFE0C910000-0x00007FFE0D3D1000-memory.dmp

Filesize
10.8MB

Download
memory/4780-9-0x00007FFE0C910000-0x00007FFE0D3D1000-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