quasar | 6651ec6dff9d3df79f30b2b59e175f6169efbabd805e19da313be7654e7874b3

Analysis

max time kernel
299s
max time network
122s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
13/06/2024, 03:34

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General

Target

Client-built.exe
Size

3.1MB
MD5

69310053c471afd15d59e86a65bf8d9f
SHA1

97811a97d9bee8e5737472f55f1ccfa97c01bc8d
SHA256

6651ec6dff9d3df79f30b2b59e175f6169efbabd805e19da313be7654e7874b3
SHA512

fc7dd986cfc597b62a48da0f48191485943702d68aa08a7191c4e5a592a1770801d33447a372a6119fc1bd6580bc19d238d1637824aafb5a04c93e07dee9c018
SSDEEP

49152:FvlY52fyaSZOrPWluWBuGG5g5hA+/3varSVoGdWBTHHB72eh2NT:Fvy52fyaSZOrPWluWBDG5g5hp3Fm

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

127.0.0.1:4040

Mutex

ccff5d2b-8b09-4307-aa1c-16eec51a02b2

Attributes

encryption_key
E1BD3EC68D46CE94607738B70CCE811ABD63A3D7
install_name
YAYAY.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Update
subdirectory
SubDir

Signatures

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

Quasar payload 3 IoCs

resource	yara_rule
behavioral1/memory/2212-1-0x0000000000E20000-0x0000000001144000-memory.dmp	family_quasar
behavioral1/files/0x003200000001471d-6.dat	family_quasar
behavioral1/memory/3060-10-0x00000000010C0000-0x00000000013E4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3060	YAYAY.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 2 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
2100	schtasks.exe
2596	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2212	Client-built.exe
Token: SeDebugPrivilege	3060	YAYAY.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3060	YAYAY.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3060	YAYAY.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2212 wrote to memory of 2100	2212	Client-built.exe	28
PID 2212 wrote to memory of 2100	2212	Client-built.exe	28
PID 2212 wrote to memory of 2100	2212	Client-built.exe	28
PID 2212 wrote to memory of 3060	2212	Client-built.exe	30
PID 2212 wrote to memory of 3060	2212	Client-built.exe	30
PID 2212 wrote to memory of 3060	2212	Client-built.exe	30
PID 3060 wrote to memory of 2596	3060	YAYAY.exe	31
PID 3060 wrote to memory of 2596	3060	YAYAY.exe	31
PID 3060 wrote to memory of 2596	3060	YAYAY.exe	31

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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2212
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\YAYAY.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:2100
- C:\Users\Admin\AppData\Roaming\SubDir\YAYAY.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\YAYAY.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:3060
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\YAYAY.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:2596

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\YAYAY.exe

Filesize
3.1MB

MD5
69310053c471afd15d59e86a65bf8d9f

SHA1
97811a97d9bee8e5737472f55f1ccfa97c01bc8d

SHA256
6651ec6dff9d3df79f30b2b59e175f6169efbabd805e19da313be7654e7874b3

SHA512
fc7dd986cfc597b62a48da0f48191485943702d68aa08a7191c4e5a592a1770801d33447a372a6119fc1bd6580bc19d238d1637824aafb5a04c93e07dee9c018

Download Submit
memory/2212-0-0x000007FEF5A33000-0x000007FEF5A34000-memory.dmp

Filesize
4KB

Download
memory/2212-1-0x0000000000E20000-0x0000000001144000-memory.dmp

Filesize
3.1MB

Download
memory/2212-2-0x000007FEF5A30000-0x000007FEF641C000-memory.dmp

Filesize
9.9MB

Download
memory/2212-9-0x000007FEF5A30000-0x000007FEF641C000-memory.dmp

Filesize
9.9MB

Download
memory/3060-8-0x000007FEF5A30000-0x000007FEF641C000-memory.dmp

Filesize
9.9MB

Download
memory/3060-10-0x00000000010C0000-0x00000000013E4000-memory.dmp

Filesize
3.1MB

Download
memory/3060-11-0x000007FEF5A30000-0x000007FEF641C000-memory.dmp

Filesize
9.9MB

Download
memory/3060-12-0x000007FEF5A30000-0x000007FEF641C000-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