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/0x0029000000045030-2.dat	family_quasar
behavioral1/memory/2656-5-0x0000000000850000-0x0000000000B74000-memory.dmp	family_quasar

Executes dropped EXE 4 IoCs

Processes:

kreo q zi.exekreo q zi.exeClient.exeClient.exe

pid	Process
2656	kreo q zi.exe
2592	kreo q zi.exe
892	Client.exe
2920	Client.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

Processes:

schtasks.exeschtasks.exeschtasks.exe

pid	Process
2452	schtasks.exe
4628	schtasks.exe
1700	schtasks.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

7zFM.exe

pid	Process
2336	7zFM.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

Processes:

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

description	pid	Process
Token: SeRestorePrivilege	2336	7zFM.exe
Token: 35	2336	7zFM.exe
Token: SeSecurityPrivilege	2336	7zFM.exe
Token: SeDebugPrivilege	2656	kreo q zi.exe
Token: SeDebugPrivilege	2592	kreo q zi.exe
Token: SeDebugPrivilege	892	Client.exe
Token: SeDebugPrivilege	2920	Client.exe

Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

7zFM.exe

pid	Process
2336	7zFM.exe
2336	7zFM.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid	Process
2920	Client.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

kreo q zi.exekreo q zi.exeClient.exe

description	pid	Process	procid_target
PID 2656 wrote to memory of 2452	2656	kreo q zi.exe	92
PID 2656 wrote to memory of 2452	2656	kreo q zi.exe	92
PID 2592 wrote to memory of 4628	2592	kreo q zi.exe	94
PID 2592 wrote to memory of 4628	2592	kreo q zi.exe	94
PID 2656 wrote to memory of 892	2656	kreo q zi.exe	96
PID 2656 wrote to memory of 892	2656	kreo q zi.exe	96
PID 2592 wrote to memory of 2920	2592	kreo q zi.exe	97
PID 2592 wrote to memory of 2920	2592	kreo q zi.exe	97
PID 2920 wrote to memory of 1700	2920	Client.exe	98
PID 2920 wrote to memory of 1700	2920	Client.exe	98

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:2336

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:2656
- 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:2452
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:892

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:2592
- 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:4628
- 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:2920
- - 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:1700

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/2656-4-0x00007FF930FA3000-0x00007FF930FA5000-memory.dmp

Filesize
8KB

Download
memory/2656-5-0x0000000000850000-0x0000000000B74000-memory.dmp

Filesize
3.1MB

Download
memory/2656-6-0x00007FF930FA0000-0x00007FF931A62000-memory.dmp

Filesize
10.8MB

Download
memory/2656-11-0x00007FF930FA0000-0x00007FF931A62000-memory.dmp

Filesize
10.8MB

Download
memory/2920-14-0x0000000002BA0000-0x0000000002BF0000-memory.dmp

Filesize
320KB

Download
memory/2920-15-0x000000001CB30000-0x000000001CBE2000-memory.dmp

Filesize
712KB

Download
memory/2920-18-0x0000000002C30000-0x0000000002C42000-memory.dmp

Filesize
72KB

Download
memory/2920-19-0x000000001CA70000-0x000000001CAAC000-memory.dmp

Filesize
240KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads