quasar | 258a88a0891701d6295f2b8cc44ef6bb9f1d81b0100714b77feb8dceaf8d8c5f

Analysis

max time kernel
519s
max time network
536s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
09/12/2024, 12:39

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General

Target

Undetected.exe
Size

3.1MB
MD5

24fb6d0cd65b9ed0723547d5584ee740
SHA1

2313a05b60b54e381ba48c54c54f49aedffd2363
SHA256

258a88a0891701d6295f2b8cc44ef6bb9f1d81b0100714b77feb8dceaf8d8c5f
SHA512

da701c25907ebb5153b2909f78add8a3c2e21c2425c38949a0b3b622d7f0953ac0fee5faec8d22bb2871808f9127b78b2a4712bfa2695b3a72de1325617809e8
SSDEEP

49152:HvyI22SsaNYfdPBldt698dBcjHWrgzMlbRwLoGdwTHHB72eh2NT:Hvf22SsaNYfdPBldt6+dBcjHWrgzMy

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.178.56:4782

Mutex

d47b824b-b4e1-49c3-b7b1-e2aed266d704

Attributes

encryption_key
591E93A21B2268B2675C524C4C3528D8858C7B87
install_name
Undetected.exe
log_directory
Logs
reconnect_delay
3000
startup_key
windows Updater5
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/4656-1-0x0000000000710000-0x0000000000A34000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b84-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3528	Undetected.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
4244	schtasks.exe
2468	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4656	Undetected.exe
Token: SeDebugPrivilege	3528	Undetected.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3528	Undetected.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4656 wrote to memory of 4244	4656	Undetected.exe	83
PID 4656 wrote to memory of 4244	4656	Undetected.exe	83
PID 4656 wrote to memory of 3528	4656	Undetected.exe	85
PID 4656 wrote to memory of 3528	4656	Undetected.exe	85
PID 3528 wrote to memory of 2468	3528	Undetected.exe	86
PID 3528 wrote to memory of 2468	3528	Undetected.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\Undetected.exe
"C:\Users\Admin\AppData\Local\Temp\Undetected.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4656
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "windows Updater5" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Undetected.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4244
- C:\Users\Admin\AppData\Roaming\SubDir\Undetected.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Undetected.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3528
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "windows Updater5" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Undetected.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2468

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\Undetected.exe.log

Filesize
1KB

MD5
baf55b95da4a601229647f25dad12878

SHA1
abc16954ebfd213733c4493fc1910164d825cac8

SHA256
ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924

SHA512
24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\Undetected.exe

Filesize
3.1MB

MD5
24fb6d0cd65b9ed0723547d5584ee740

SHA1
2313a05b60b54e381ba48c54c54f49aedffd2363

SHA256
258a88a0891701d6295f2b8cc44ef6bb9f1d81b0100714b77feb8dceaf8d8c5f

SHA512
da701c25907ebb5153b2909f78add8a3c2e21c2425c38949a0b3b622d7f0953ac0fee5faec8d22bb2871808f9127b78b2a4712bfa2695b3a72de1325617809e8

Download Submit
memory/3528-10-0x00007FFDC4010000-0x00007FFDC4AD1000-memory.dmp

Filesize
10.8MB

Download
memory/3528-12-0x00007FFDC4010000-0x00007FFDC4AD1000-memory.dmp

Filesize
10.8MB

Download
memory/3528-13-0x000000001BE10000-0x000000001BE60000-memory.dmp

Filesize
320KB

Download
memory/3528-14-0x000000001BF20000-0x000000001BFD2000-memory.dmp

Filesize
712KB

Download
memory/3528-15-0x00007FFDC4010000-0x00007FFDC4AD1000-memory.dmp

Filesize
10.8MB

Download
memory/4656-0-0x00007FFDC4013000-0x00007FFDC4015000-memory.dmp

Filesize
8KB

Download
memory/4656-1-0x0000000000710000-0x0000000000A34000-memory.dmp

Filesize
3.1MB

Download
memory/4656-2-0x00007FFDC4010000-0x00007FFDC4AD1000-memory.dmp

Filesize
10.8MB

Download
memory/4656-11-0x00007FFDC4010000-0x00007FFDC4AD1000-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