quasar | 773e13fffd0842e717ce55e2a678da37123c55186f9c92460c671261b1654ffd

Analysis

max time kernel
148s
max time network
158s
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 17:41

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General

Target

33C2ADEBFE2C3ACEDFB34FFFF8151B7D.exe
Size

72.2MB
MD5

33c2adebfe2c3acedfb34ffff8151b7d
SHA1

8e93f7ecafa92017a7d528423574ab5cfeec754a
SHA256

773e13fffd0842e717ce55e2a678da37123c55186f9c92460c671261b1654ffd
SHA512

6f545b4da55412ec78de6d1c3bddbcc6bb857b7d13b15fe4bb832259dbe1842d44a02b46395233c23ca57abd34239226a60c9f7ee26fcf82ba383a836f8d61ad
SSDEEP

1572864:yIWs/6+mI5n17YTIytz8ATFiQiFGaaoE13gIFxXtzM/zMfCOA6Z:ssJmIBiTvR8UFiQYGvoq35FVEeCOr

Score

10^/10

quasar office04 discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

167.71.56.116:22269

Mutex

3470ac31-30aa-4cf6-ab0a-1ed0dd64656f

Attributes

encryption_key
33E08519CDBEF59C54E93052681A76D1969C659E
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

resource	yara_rule
behavioral2/files/0x000a000000023b7f-1334.dat	family_quasar
behavioral2/memory/4708-1342-0x0000000000F50000-0x0000000001274000-memory.dmp	family_quasar

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	33C2ADEBFE2C3ACEDFB34FFFF8151B7D.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	Client-built.exe

Executes dropped EXE 1 IoCs

pid	Process
4708	Client-built.exe

Drops desktop.ini file(s) 2 IoCs

description	ioc	Process
File created	C:\Windows\assembly\Desktop.ini	33C2ADEBFE2C3ACEDFB34FFFF8151B7D.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	33C2ADEBFE2C3ACEDFB34FFFF8151B7D.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\assembly\Desktop.ini	33C2ADEBFE2C3ACEDFB34FFFF8151B7D.exe
File opened for modification	C:\Windows\assembly	33C2ADEBFE2C3ACEDFB34FFFF8151B7D.exe
File created	C:\Windows\assembly\Desktop.ini	33C2ADEBFE2C3ACEDFB34FFFF8151B7D.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	33C2ADEBFE2C3ACEDFB34FFFF8151B7D.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2104	33C2ADEBFE2C3ACEDFB34FFFF8151B7D.exe
Token: SeDebugPrivilege	4708	Client-built.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2104 wrote to memory of 4708	2104	33C2ADEBFE2C3ACEDFB34FFFF8151B7D.exe	84
PID 2104 wrote to memory of 4708	2104	33C2ADEBFE2C3ACEDFB34FFFF8151B7D.exe	84

C:\Users\Admin\AppData\Local\Temp\33C2ADEBFE2C3ACEDFB34FFFF8151B7D.exe
"C:\Users\Admin\AppData\Local\Temp\33C2ADEBFE2C3ACEDFB34FFFF8151B7D.exe"
1⤵
- Checks computer location settings
- Drops desktop.ini file(s)
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2104
- C:\Users\Admin\AppData\Local\Temp\Client-built.exe
  "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:4708

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Client-built.exe

Filesize
3.1MB

MD5
181719b653c83d0463d89a625a7f5c3e

SHA1
1173005be27979dc74779e60dc790299e4f2b0a4

SHA256
03a4b081b4966130cbe615ff249954e7e9a0d62a79faf8e56ac3830929748e43

SHA512
d05e6fc586a8731903df4cffe3bdcb92f99e2cdbe15e40706e87ecc038e4e9b1ef1fc9a39f8adeda4341e3507f2f8f81ae50d590ff9f4233cd7694b26fb3fa04

Download Submit
memory/2104-35-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-64-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-3-0x0000000075150000-0x0000000075701000-memory.dmp

Filesize
5.7MB

Download
memory/2104-6-0x0000000075150000-0x0000000075701000-memory.dmp

Filesize
5.7MB

Download
memory/2104-7-0x0000000075150000-0x0000000075701000-memory.dmp

Filesize
5.7MB

Download
memory/2104-8-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-9-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-11-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-13-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-17-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-15-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-19-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-21-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-23-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-25-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-27-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-39-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-31-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-37-0x0000000075152000-0x0000000075153000-memory.dmp

Filesize
4KB

Download
memory/2104-38-0x0000000075150000-0x0000000075701000-memory.dmp

Filesize
5.7MB

Download
memory/2104-33-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-0-0x0000000075152000-0x0000000075153000-memory.dmp

Filesize
4KB

Download
memory/2104-43-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-1348-0x0000000075150000-0x0000000075701000-memory.dmp

Filesize
5.7MB

Download
memory/2104-29-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-45-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-47-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-54-0x0000000075150000-0x0000000075701000-memory.dmp

Filesize
5.7MB

Download
memory/2104-51-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-49-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-53-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-56-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-58-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-60-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-2-0x0000000075150000-0x0000000075701000-memory.dmp

Filesize
5.7MB

Download
memory/2104-62-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-66-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-68-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-185-0x0000000075150000-0x0000000075701000-memory.dmp

Filesize
5.7MB

Download
memory/2104-70-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-73-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-74-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/2104-1-0x0000000075150000-0x0000000075701000-memory.dmp

Filesize
5.7MB

Download
memory/2104-42-0x0000000020A30000-0x0000000025259000-memory.dmp

Filesize
72.2MB

Download
memory/4708-1341-0x00007FFCC7A13000-0x00007FFCC7A15000-memory.dmp

Filesize
8KB

Download
memory/4708-1342-0x0000000000F50000-0x0000000001274000-memory.dmp

Filesize
3.1MB

Download