quasar | 282d6f5ddc83351dab51e6decc1293b078638f0cfd0baca4673afc8246fd32bd

General

Target

kreo q zi.7z
Size

922KB
MD5

ec516db688f94e98d5141f4bade557e9
SHA1

198ffbae5eed415ac673f5e371774759f1a53de1
SHA256

282d6f5ddc83351dab51e6decc1293b078638f0cfd0baca4673afc8246fd32bd
SHA512

ecc34ad7d15fbedbbc4e62b469f5e6e5e71099e19831574da61dc9f751ed5b2faad1676b8b3dbf0911c4dac628c7a15e9d07d953692c5ab1b700ea07f6396985
SSDEEP

24576:yScP7qLl4iGQATiKL0aywxTodSrUF+nVZLLymvgDoSAWcNtMXqWOU:07qLl4KATiJUo0UEnLmmvqiWcNtMXDOU

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

hola435-24858.portmap.host:24858

Mutex

e51e2b65-e963-4051-9736-67d57ed46798

Attributes

encryption_key
AEA258EF65BF1786F0F767C0BE2497ECC304C46F
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral1/files/0x002800000004516d-2.dat	family_quasar
behavioral1/memory/2428-5-0x00000000000A0000-0x00000000003C4000-memory.dmp	family_quasar

Executes dropped EXE 3 IoCs

Processes:

kreo q zi.exeClient.exekreo q zi.exe

pid	Process
2428	kreo q zi.exe
1088	Client.exe
4300	kreo q zi.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

Processes:

schtasks.exeschtasks.exe

pid	Process
1704	schtasks.exe
1624	schtasks.exe

Suspicious behavior: EnumeratesProcesses 33 IoCs

Processes:

Client.exe

pid	Process
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe
1088	Client.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

7zFM.exe

pid	Process
1220	7zFM.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

7zFM.exekreo q zi.exeClient.exekreo q zi.exe

description	pid	Process
Token: SeRestorePrivilege	1220	7zFM.exe
Token: 35	1220	7zFM.exe
Token: SeSecurityPrivilege	1220	7zFM.exe
Token: SeDebugPrivilege	2428	kreo q zi.exe
Token: SeDebugPrivilege	1088	Client.exe
Token: SeDebugPrivilege	4300	kreo q zi.exe

Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

7zFM.exe

pid	Process
1220	7zFM.exe
1220	7zFM.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid	Process
1088	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

kreo q zi.exeClient.exe

description	pid	Process	procid_target
PID 2428 wrote to memory of 1704	2428	kreo q zi.exe	96
PID 2428 wrote to memory of 1704	2428	kreo q zi.exe	96
PID 2428 wrote to memory of 1088	2428	kreo q zi.exe	98
PID 2428 wrote to memory of 1088	2428	kreo q zi.exe	98
PID 1088 wrote to memory of 1624	1088	Client.exe	100
PID 1088 wrote to memory of 1624	1088	Client.exe	100

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:\Program Files\7-Zip\7zFM.exe
"C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\kreo q zi.7z"
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
PID:1220

C:\Users\Admin\Desktop\kreo q zi.exe
"C:\Users\Admin\Desktop\kreo q zi.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2428
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1704
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1088
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1624

C:\Users\Admin\Desktop\kreo q zi.exe
"C:\Users\Admin\Desktop\kreo q zi.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4300

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\kreo q zi.exe.log

Filesize
1KB

MD5
b08c36ce99a5ed11891ef6fc6d8647e9

SHA1
db95af417857221948eb1882e60f98ab2914bf1d

SHA256
cc9248a177495f45ec70b86c34fc5746c56730af36ace98ac7eb365dbafda674

SHA512
07e62581eace395b0a9699d727761648103180c21155d84ea09140f9e1c9690705c419118545aa67a564334bbde32710225fe3aa92b0b4b4210cb91f0058b1ea

Download Submit
C:\Users\Admin\Desktop\kreo q zi.exe

Filesize
3.1MB

MD5
28ac02fc40c8f1c2a8989ee3c09a1372

SHA1
b182758b62a1482142c0fce4be78c786e08b7025

SHA256
0fe81f9a51cf0068408de3c3605ce2033a00bd7ec90cc9516c38f6069e06433b

SHA512
2cbf2f6af46e5fae8e67144e1ac70bc748036c7adb7f7810d7d7d9f255ccf5d163cce07f11fb6526f9ab61c39f28bdf2356cc315b19a61cd2115612882eab767

Download Submit
memory/1088-13-0x000000001D020000-0x000000001D0D2000-memory.dmp

Filesize
712KB

Download
memory/1088-12-0x000000001CF10000-0x000000001CF60000-memory.dmp

Filesize
320KB

Download
memory/1088-16-0x000000001CFA0000-0x000000001CFB2000-memory.dmp

Filesize
72KB

Download
memory/1088-17-0x000000001DB20000-0x000000001DB5C000-memory.dmp

Filesize
240KB

Download
memory/2428-4-0x00007FF9C4883000-0x00007FF9C4885000-memory.dmp

Filesize
8KB

Download
memory/2428-5-0x00000000000A0000-0x00000000003C4000-memory.dmp

Filesize
3.1MB

Download
memory/2428-6-0x00007FF9C4880000-0x00007FF9C5342000-memory.dmp

Filesize
10.8MB

Download
memory/2428-9-0x00007FF9C4880000-0x00007FF9C5342000-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