quasar | e1dd16d3d0550466cd1e5efa60ea8f0d3b204f52ddccb4b58d46a7dba9dc5587

Analysis

max time kernel
447s
max time network
450s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241211-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241211-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
15-12-2024 15:41

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Client-built.exe
Size

3.1MB
MD5

749286088524b5c49a9f6fd5dd15de49
SHA1

bc255bc2f5a7f50e8fec2e5eca55c82de0bb15a2
SHA256

e1dd16d3d0550466cd1e5efa60ea8f0d3b204f52ddccb4b58d46a7dba9dc5587
SHA512

b0ac4798d04e443f6e795e718bf301a885bc96ab2bd12f4d2b14d47e75aa897b5f53c22dab14b95a12a4f2e177d86a78a0af08ab916906a9a9ce7eb0b860dd8e
SSDEEP

49152:WvWI22SsaNYfdPBldt698dBcjHSlRJ6ibR3LoGd09THHB72eh2NT:Wv722SsaNYfdPBldt6+dBcjHSlRJ6c

Score

10^/10

quasar kdotcrypt discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

KDOTCrypt

fedx.ddns.net:7000

Mutex

f70e50c5-1467-4cc3-8be1-b4ca15c11c35

Attributes

encryption_key
92470F4731518ABFA77DC89068544FB7E7B7C459
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 1 IoCs

resource	yara_rule
behavioral1/memory/1148-1-0x0000000000640000-0x0000000000964000-memory.dmp	family_quasar

Checks computer location settings 2 TTPs 1 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-1-5-21-4084745894-3294430273-2212167662-1000\Control Panel\International\Geo\Nation	Client-built.exe

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

System Information Discovery
T1082

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2124	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2124	PING.EXE

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1148	Client-built.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1148 wrote to memory of 3044	1148	Client-built.exe	85
PID 1148 wrote to memory of 3044	1148	Client-built.exe	85
PID 3044 wrote to memory of 2616	3044	cmd.exe	87
PID 3044 wrote to memory of 2616	3044	cmd.exe	87
PID 3044 wrote to memory of 2124	3044	cmd.exe	88
PID 3044 wrote to memory of 2124	3044	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1148
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\VPXpzTJb5X8F.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3044
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:2616
- - C:\Windows\system32\PING.EXE
    ping -n 10 localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2124

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\VPXpzTJb5X8F.bat

Filesize
213B

MD5
009b24a8dc7dbec220ad746fce19289a

SHA1
e28aebc3fd69337e95d0004b3f41f4d72e90bf87

SHA256
a37e9ae960abd7bb3f862430d52953f3df6fb1c2150ea6141095bcfdec254e56

SHA512
3bd5823b0ca20878d16d9a72fe4f11e99535ef9c6d5b2c1567fc66406f4afb2cc90ec37a3c0e962bfc627394865609fe7205a09eeb7cc472e1a5cb92e9a53052

Download Submit
memory/1148-0-0x00007FF9D41B3000-0x00007FF9D41B5000-memory.dmp

Filesize
8KB

Download
memory/1148-1-0x0000000000640000-0x0000000000964000-memory.dmp

Filesize
3.1MB

Download
memory/1148-2-0x00007FF9D41B0000-0x00007FF9D4C72000-memory.dmp

Filesize
10.8MB

Download
memory/1148-3-0x000000001DA40000-0x000000001DA90000-memory.dmp

Filesize
320KB

Download
memory/1148-4-0x000000001DB50000-0x000000001DC02000-memory.dmp

Filesize
712KB

Download
memory/1148-5-0x000000001DA90000-0x000000001DAA2000-memory.dmp

Filesize
72KB

Download
memory/1148-6-0x000000001DAF0000-0x000000001DB2C000-memory.dmp

Filesize
240KB

Download
memory/1148-7-0x00007FF9D41B3000-0x00007FF9D41B5000-memory.dmp

Filesize
8KB

Download
memory/1148-8-0x00007FF9D41B0000-0x00007FF9D4C72000-memory.dmp

Filesize
10.8MB

Download
memory/1148-16-0x00007FF9D41B0000-0x00007FF9D4C72000-memory.dmp

Filesize
10.8MB

Download