quasar | b13782ae51e07bd7a88e150b84aaee20a778dbeb6f14723f4d93d65c22e6e031

Analysis

max time kernel
137s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
07/05/2023, 09:24

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General

Target
XForce.exe
Size 3.1MB
Sample230507-lc2m4aga2v
SHA256 b13782ae51e07bd7a88e150b84aaee20a778dbeb6f14723f4d93d65c22e6e031
MD5 e1b58ffe9679587a57b905598f8cbae4
SHA1 1e7ac6fa80003028e35016d6bb408d56c221c521
SHA512 9dce0aa7b330ae937d2558d9ba208f6d3842286dcc136655526925cee40dc6e515bad27ed24066c4ad8d93117e196f15ceaeebd6203a6c6f487724ec964bebb9
SSDEEP 49152:yveI22SsaNYfdPBldt698dBcjHjiRJ6ZbR3LoGd2THHB72eh2NT:yvT22SsaNYfdPBldt6+dBcjHjiRJ6b
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.1.66:4782

Mutex

64e621c5-77ac-456c-abef-5965cdc1725c

Attributes

encryption_key
009DAF07B669D99FA8EE500DD1A9F9302B984B16
install_name
X-Force.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 payload 3 IoCs

resource	yara_rule
behavioral2/memory/1824-133-0x0000000000A60000-0x0000000000D84000-memory.dmp	family_quasar
behavioral2/files/0x000800000002314e-137.dat	family_quasar
behavioral2/files/0x000800000002314e-139.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1564	X-Force.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\system32\SubDir\X-Force.exe	XForce.exe
File opened for modification	C:\Windows\system32\SubDir\X-Force.exe	XForce.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

T1053

pid	Process
1244	schtasks.exe
3436	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1824	XForce.exe
Token: SeDebugPrivilege	1564	X-Force.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1564	X-Force.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1564	X-Force.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1564	X-Force.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1824 wrote to memory of 1244	1824	XForce.exe	82
PID 1824 wrote to memory of 1244	1824	XForce.exe	82
PID 1824 wrote to memory of 1564	1824	XForce.exe	84
PID 1824 wrote to memory of 1564	1824	XForce.exe	84
PID 1564 wrote to memory of 3436	1564	X-Force.exe	85
PID 1564 wrote to memory of 3436	1564	X-Force.exe	85

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\XForce.exe
"C:\Users\Admin\AppData\Local\Temp\XForce.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1824
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\X-Force.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1244
- C:\Windows\system32\SubDir\X-Force.exe
  "C:\Windows\system32\SubDir\X-Force.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1564
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\X-Force.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:3436

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

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

X-Force.exe

Path C:\Windows\System32\SubDir\X-Force.exe
Size 3.1MB
SHA256 b13782ae51e07bd7a88e150b84aaee20a778dbeb6f14723f4d93d65c22e6e031
MD5 e1b58ffe9679587a57b905598f8cbae4
SHA1 1e7ac6fa80003028e35016d6bb408d56c221c521
SHA512 9dce0aa7b330ae937d2558d9ba208f6d3842286dcc136655526925cee40dc6e515bad27ed24066c4ad8d93117e196f15ceaeebd6203a6c6f487724ec964bebb9
SSDEEP 49152:yveI22SsaNYfdPBldt698dBcjHjiRJ6ZbR3LoGd2THHB72eh2NT:yvT22SsaNYfdPBldt6+dBcjHjiRJ6b
MD5 SHA1 SHA512 SSDEEP

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X-Force.exe

Path C:\Windows\system32\SubDir\X-Force.exe
Size 3.1MB
SHA256 b13782ae51e07bd7a88e150b84aaee20a778dbeb6f14723f4d93d65c22e6e031
MD5 e1b58ffe9679587a57b905598f8cbae4
SHA1 1e7ac6fa80003028e35016d6bb408d56c221c521
SHA512 9dce0aa7b330ae937d2558d9ba208f6d3842286dcc136655526925cee40dc6e515bad27ed24066c4ad8d93117e196f15ceaeebd6203a6c6f487724ec964bebb9
SSDEEP 49152:yveI22SsaNYfdPBldt698dBcjHjiRJ6ZbR3LoGd2THHB72eh2NT:yvT22SsaNYfdPBldt6+dBcjHjiRJ6b
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1564-140-0x000000001BA40000-0x000000001BA50000-memory.dmp

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memory/1564-141-0x000000001C7B0000-0x000000001C800000-memory.dmp

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memory/1564-142-0x000000001C8C0000-0x000000001C972000-memory.dmp

Download

memory/1564-143-0x000000001BA40000-0x000000001BA50000-memory.dmp

Download

memory/1824-133-0x0000000000A60000-0x0000000000D84000-memory.dmp

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memory/1824-134-0x000000001B9A0000-0x000000001B9B0000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads