quasar | e3061316ff7828b9471979d0e50b64d9050c8c42de21fa4a4a2bb6d51c753a83

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
05-06-2024 19:39

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General

Target

Client-built.exe
Size

3.1MB
MD5

6ed079e125e5cb44b9a356d7841b2552
SHA1

064a8b8f919bd991cb522b64ea8961b54a06eec1
SHA256

e3061316ff7828b9471979d0e50b64d9050c8c42de21fa4a4a2bb6d51c753a83
SHA512

f71124e41db02717981fea66a378368d11fe9606fdc343371a92d0748f4211dcc9ba5435ca5dba4cacbd31e39f1937cf0698334284b2535169d8fc2aed0e171d
SSDEEP

49152:KvOI22SsaNYfdPBldt698dBcjHwrxNESEsk/i2LoGd/THHB72eh2NT:Kvj22SsaNYfdPBldt6+dBcjHgxX4

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

142.161.90.171:5000

Mutex

a7509023-1226-4493-880a-2f99c5fd7acf

Attributes

encryption_key
42264509D6E4D45CA690ED3425881B1D02A87342
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 payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/460-1-0x00000000005E0000-0x0000000000904000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

1984 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

Processes:

Client-built.exeClient.exe

description pid process

Token: SeDebugPrivilege 460 Client-built.exe
Token: SeDebugPrivilege 1984 Client.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Client.exe

pid process

1984 Client.exe
1984 Client.exe
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Client.exe

pid process

1984 Client.exe
1984 Client.exe

pid	process
1984	Client.exe

description	pid	process
Token: SeDebugPrivilege	460	Client-built.exe
Token: SeDebugPrivilege	1984	Client.exe

pid	process
1984	Client.exe
1984	Client.exe

pid	process
1984	Client.exe
1984	Client.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

Client-built.exe

description	pid	process	target process
PID 460 wrote to memory of 1984	460	Client-built.exe	Client.exe
PID 460 wrote to memory of 1984	460	Client-built.exe	Client.exe

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:460

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
PID:1984

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
Filesize
3.1MB

MD5
6ed079e125e5cb44b9a356d7841b2552

SHA1
064a8b8f919bd991cb522b64ea8961b54a06eec1

SHA256
e3061316ff7828b9471979d0e50b64d9050c8c42de21fa4a4a2bb6d51c753a83

SHA512
f71124e41db02717981fea66a378368d11fe9606fdc343371a92d0748f4211dcc9ba5435ca5dba4cacbd31e39f1937cf0698334284b2535169d8fc2aed0e171d

Download Submit
memory/460-0-0x00007FF8598C3000-0x00007FF8598C5000-memory.dmp

Filesize
8KB

Download
memory/460-1-0x00000000005E0000-0x0000000000904000-memory.dmp

Filesize
3.1MB

Download
memory/460-2-0x00007FF8598C0000-0x00007FF85A381000-memory.dmp

Filesize
10.8MB

Download
memory/460-8-0x00007FF8598C0000-0x00007FF85A381000-memory.dmp

Filesize
10.8MB

Download
memory/1984-10-0x00007FF8598C0000-0x00007FF85A381000-memory.dmp

Filesize
10.8MB

Download
memory/1984-9-0x00007FF8598C0000-0x00007FF85A381000-memory.dmp

Filesize
10.8MB

Download
memory/1984-11-0x000000001C6A0000-0x000000001C6F0000-memory.dmp

Filesize
320KB

Download
memory/1984-12-0x000000001C7B0000-0x000000001C862000-memory.dmp

Filesize
712KB

Download
memory/1984-16-0x000000001C750000-0x000000001C78C000-memory.dmp

Filesize
240KB

Download
memory/1984-15-0x000000001C6F0000-0x000000001C702000-memory.dmp

Filesize
72KB

Download
memory/1984-17-0x000000001D2B0000-0x000000001D3B2000-memory.dmp

Filesize
1.0MB

Download
memory/1984-19-0x00007FF8598C0000-0x00007FF85A381000-memory.dmp

Filesize
10.8MB

Download
memory/1984-20-0x00007FF8598C0000-0x00007FF85A381000-memory.dmp

Filesize
10.8MB

Download