quasar | e1dd16d3d0550466cd1e5efa60ea8f0d3b204f52ddccb4b58d46a7dba9dc5587

Analysis

max time kernel
303s
max time network
427s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
15-12-2024 15:40

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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/416-1-0x00000000001E0000-0x0000000000504000-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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	Client-built.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
24	api.ipify.org
25	api.ipify.org

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
2820	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2820	PING.EXE

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	416	Client-built.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 416 wrote to memory of 3204	416	Client-built.exe	90
PID 416 wrote to memory of 3204	416	Client-built.exe	90
PID 3204 wrote to memory of 944	3204	cmd.exe	92
PID 3204 wrote to memory of 944	3204	cmd.exe	92
PID 3204 wrote to memory of 2820	3204	cmd.exe	93
PID 3204 wrote to memory of 2820	3204	cmd.exe	93

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:416
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\MyTzdRRiA8vO.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3204
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:944
- - C:\Windows\system32\PING.EXE
    ping -n 10 localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2820

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\MyTzdRRiA8vO.bat

Filesize
213B

MD5
5316887352308abd1d675de86dc13d5a

SHA1
23abc9dba2b65a0bd10b2278a5329595edbaa316

SHA256
534def8b4c8cc783876f8f17b293d86458d8ba2b5f9d3627c40589d89100dd61

SHA512
1565018990b15e90be39bf407788abf49c071a0450edb093f1b43c1e6020b265ea6f3bf987a13085324443a4a2314215d995275d56091ef9c9b005818477cf20

Download Submit
memory/416-0-0x00007FFE4CDD3000-0x00007FFE4CDD5000-memory.dmp

Filesize
8KB

Download
memory/416-1-0x00000000001E0000-0x0000000000504000-memory.dmp

Filesize
3.1MB

Download
memory/416-2-0x00007FFE4CDD0000-0x00007FFE4D891000-memory.dmp

Filesize
10.8MB

Download
memory/416-3-0x000000001B160000-0x000000001B1B0000-memory.dmp

Filesize
320KB

Download
memory/416-4-0x000000001CE10000-0x000000001CEC2000-memory.dmp

Filesize
712KB

Download
memory/416-7-0x00007FFE4CDD3000-0x00007FFE4CDD5000-memory.dmp

Filesize
8KB

Download
memory/416-8-0x00007FFE4CDD0000-0x00007FFE4D891000-memory.dmp

Filesize
10.8MB

Download
memory/416-13-0x00007FFE4CDD0000-0x00007FFE4D891000-memory.dmp

Filesize
10.8MB

Download