quasar | 841f178c15802a89ad903f05c5148bca7ef49efd9113d636cad35067be4a4164

Analysis

max time kernel
150s
max time network
147s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
17-12-2024 06:43

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General

Target

Client-built.exe
Size

3.1MB
MD5

1d5b1579c6cf546964a067edf15d75e6
SHA1

1d3e8bb39c7ad10f864efe0adfe8c4028a6fa332
SHA256

841f178c15802a89ad903f05c5148bca7ef49efd9113d636cad35067be4a4164
SHA512

6e9d6228928775787a4d25c1a82d36b68bb082c04cb08afb2abe93aff4d54fb25d0e216a5eb7bc11f260bfe3191259f61261556620895b5fc96e76438e354f02
SSDEEP

49152:6v+I22SsaNYfdPBldt698dBcjH7OmumzRfoGdRTHHB72eh2NT:6vz22SsaNYfdPBldt6+dBcjH7Oml

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

suport24.ddns.net:4782

Mutex

b4ad83f8-b608-477d-8395-2274bcaab6d1

Attributes

encryption_key
62EF51244AF3535A6A9C77206CD89D5BFECD7E4E
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 3 IoCs

resource	yara_rule
behavioral1/memory/2096-1-0x0000000000AE0000-0x0000000000E04000-memory.dmp	family_quasar
behavioral1/files/0x00080000000173fb-6.dat	family_quasar
behavioral1/memory/3056-10-0x00000000009C0000-0x0000000000CE4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3056	Client.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2096	Client-built.exe
Token: SeDebugPrivilege	3056	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3056	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3056	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3056	Client.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2096 wrote to memory of 3056	2096	Client-built.exe	30
PID 2096 wrote to memory of 3056	2096	Client-built.exe	30
PID 2096 wrote to memory of 3056	2096	Client-built.exe	30

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:2096
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  PID:3056

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
3.1MB

MD5
1d5b1579c6cf546964a067edf15d75e6

SHA1
1d3e8bb39c7ad10f864efe0adfe8c4028a6fa332

SHA256
841f178c15802a89ad903f05c5148bca7ef49efd9113d636cad35067be4a4164

SHA512
6e9d6228928775787a4d25c1a82d36b68bb082c04cb08afb2abe93aff4d54fb25d0e216a5eb7bc11f260bfe3191259f61261556620895b5fc96e76438e354f02

Download Submit
memory/2096-0-0x000007FEF56D3000-0x000007FEF56D4000-memory.dmp

Filesize
4KB

Download
memory/2096-1-0x0000000000AE0000-0x0000000000E04000-memory.dmp

Filesize
3.1MB

Download
memory/2096-2-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

Filesize
9.9MB

Download
memory/2096-8-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

Filesize
9.9MB

Download
memory/3056-9-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

Filesize
9.9MB

Download
memory/3056-10-0x00000000009C0000-0x0000000000CE4000-memory.dmp

Filesize
3.1MB

Download
memory/3056-11-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

Filesize
9.9MB

Download
memory/3056-12-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

Filesize
9.9MB

Download