quasar | 34b759044bb006cfa44294f77ebdce8c0fcc4f46a29389367b7656540cca5040

Analysis

max time kernel
126s
max time network
136s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
22-12-2024 10:16

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General

Target

FnPull.exe
Size

3.1MB
MD5

b70f21695faf7d3ebe315f12c625bdf6
SHA1

7f7a6240b29ddb975667e676f49e419b0f6ebab2
SHA256

34b759044bb006cfa44294f77ebdce8c0fcc4f46a29389367b7656540cca5040
SHA512

b67eed929cd07fe30f84eb2f57818933d543a77f35e694f2c0a8057b36e74918eb31438ac82301047f3c2748986b859b637a3ad617cd8c007cf9dc218ab753d7
SSDEEP

49152:2vUt62XlaSFNWPjljiFa2RoUYIcStS+4A/h1oGd8/THHB72eh2NT:2vI62XlaSFNWPjljiFXRoUYIcQS1A/v

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

10.0.0.74:4782

Mutex

6c5433c5-9f1a-458c-b39f-92c6df8cddac

Attributes

encryption_key
4363B48E7906D56C2D59200480989BD5BB39F5EC
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Window AntiMalWare
subdirectory
SubDir

Signatures

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

Quasar payload 3 IoCs

resource	yara_rule
behavioral1/memory/2592-1-0x0000000000AF0000-0x0000000000E14000-memory.dmp	family_quasar
behavioral1/files/0x0008000000016c66-6.dat	family_quasar
behavioral1/memory/2576-9-0x0000000000960000-0x0000000000C84000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2576	Client.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
1744	schtasks.exe
2120	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2592	FnPull.exe
Token: SeDebugPrivilege	2576	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2576	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2592 wrote to memory of 1744	2592	FnPull.exe	30
PID 2592 wrote to memory of 1744	2592	FnPull.exe	30
PID 2592 wrote to memory of 1744	2592	FnPull.exe	30
PID 2592 wrote to memory of 2576	2592	FnPull.exe	32
PID 2592 wrote to memory of 2576	2592	FnPull.exe	32
PID 2592 wrote to memory of 2576	2592	FnPull.exe	32
PID 2576 wrote to memory of 2120	2576	Client.exe	33
PID 2576 wrote to memory of 2120	2576	Client.exe	33
PID 2576 wrote to memory of 2120	2576	Client.exe	33

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\FnPull.exe
"C:\Users\Admin\AppData\Local\Temp\FnPull.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2592
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Window AntiMalWare" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1744
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2576
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Window AntiMalWare" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2120

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\SubDir\Client.exe

Filesize
3.1MB

MD5
b70f21695faf7d3ebe315f12c625bdf6

SHA1
7f7a6240b29ddb975667e676f49e419b0f6ebab2

SHA256
34b759044bb006cfa44294f77ebdce8c0fcc4f46a29389367b7656540cca5040

SHA512
b67eed929cd07fe30f84eb2f57818933d543a77f35e694f2c0a8057b36e74918eb31438ac82301047f3c2748986b859b637a3ad617cd8c007cf9dc218ab753d7

Download Submit
memory/2576-10-0x000007FEF53F0000-0x000007FEF5DDC000-memory.dmp

Filesize
9.9MB

Download
memory/2576-11-0x000007FEF53F0000-0x000007FEF5DDC000-memory.dmp

Filesize
9.9MB

Download
memory/2576-9-0x0000000000960000-0x0000000000C84000-memory.dmp

Filesize
3.1MB

Download
memory/2576-12-0x000007FEF53F0000-0x000007FEF5DDC000-memory.dmp

Filesize
9.9MB

Download
memory/2592-0-0x000007FEF53F3000-0x000007FEF53F4000-memory.dmp

Filesize
4KB

Download
memory/2592-1-0x0000000000AF0000-0x0000000000E14000-memory.dmp

Filesize
3.1MB

Download
memory/2592-2-0x000007FEF53F0000-0x000007FEF5DDC000-memory.dmp

Filesize
9.9MB

Download
memory/2592-8-0x000007FEF53F0000-0x000007FEF5DDC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads