quasar | 9a20abb95dd8ee12f24afcd2729e9f92493feca9d2fe75aaa9b1758c08a93f44

Analysis

max time kernel
94s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
11-12-2024 14:08

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General

Target

Client-built.exe
Size

3.1MB
MD5

c10246a3d7708f3f62e843ece9d68fa4
SHA1

81c15351ad25c46676a93b82eccf6a7abb9c4727
SHA256

9a20abb95dd8ee12f24afcd2729e9f92493feca9d2fe75aaa9b1758c08a93f44
SHA512

a960fed8a6780f598be60634bbcbf0967a7035c3a74ffb293610f10153afcfe92989c5253c75c0b164fd36cf00a83a6b2ff0be722bd6b9a9d8bff4a8a5e69323
SSDEEP

49152:2vOI22SsaNYfdPBldt698dBcjHVPDPEQs/kC6nLoG7pTHHB72eh2NT:2vj22SsaNYfdPBldt6+dBcjHVPD9L

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

147.185.221.24:26130

Mutex

0c16ac3a-65ad-4a46-aa3d-7e603e8df11d

Attributes

encryption_key
8DF659EF1733572C92CB099CAABF5BB85EC5170A
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/memory/2844-1-0x0000000000660000-0x0000000000984000-memory.dmp	family_quasar
behavioral2/files/0x000b000000023b78-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1792	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	2844	Client-built.exe
Token: SeDebugPrivilege	1792	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1792	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1792	Client.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2844 wrote to memory of 1792	2844	Client-built.exe	82
PID 2844 wrote to memory of 1792	2844	Client-built.exe	82

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:2844
- 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:1792

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
c10246a3d7708f3f62e843ece9d68fa4

SHA1
81c15351ad25c46676a93b82eccf6a7abb9c4727

SHA256
9a20abb95dd8ee12f24afcd2729e9f92493feca9d2fe75aaa9b1758c08a93f44

SHA512
a960fed8a6780f598be60634bbcbf0967a7035c3a74ffb293610f10153afcfe92989c5253c75c0b164fd36cf00a83a6b2ff0be722bd6b9a9d8bff4a8a5e69323

Download Submit
memory/1792-8-0x00007FFA4CE50000-0x00007FFA4D911000-memory.dmp

Filesize
10.8MB

Download
memory/1792-10-0x00007FFA4CE50000-0x00007FFA4D911000-memory.dmp

Filesize
10.8MB

Download
memory/1792-11-0x000000001BBF0000-0x000000001BC40000-memory.dmp

Filesize
320KB

Download
memory/1792-12-0x000000001BD00000-0x000000001BDB2000-memory.dmp

Filesize
712KB

Download
memory/1792-13-0x00007FFA4CE50000-0x00007FFA4D911000-memory.dmp

Filesize
10.8MB

Download
memory/2844-0-0x00007FFA4CE53000-0x00007FFA4CE55000-memory.dmp

Filesize
8KB

Download
memory/2844-1-0x0000000000660000-0x0000000000984000-memory.dmp

Filesize
3.1MB

Download
memory/2844-2-0x00007FFA4CE50000-0x00007FFA4D911000-memory.dmp

Filesize
10.8MB

Download
memory/2844-9-0x00007FFA4CE50000-0x00007FFA4D911000-memory.dmp

Filesize
10.8MB

Download