quasar | aaac0a15c0e347fc8be6933015f8e9293dbaf217a34ce9b57d75de1dd3f6b1af

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
15/06/2024, 12:29

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General

Target

Client-built.exe
Size

3.1MB
MD5

cabf60cd922c090eab3479a54df85881
SHA1

2d8cac7f6d34d091fd8b3492db12ed2b03de42e1
SHA256

aaac0a15c0e347fc8be6933015f8e9293dbaf217a34ce9b57d75de1dd3f6b1af
SHA512

be7b72cd2aab15a455095677d1ce6b89c2cc7ffa64f20ffb2237f7d4f400af127dfa1ef3211463f4a7b7c6a01615c2187a98d5be01759ed5fef89b7e4de31f34
SSDEEP

49152:3vaI22SsaNYfdPBldt698dBcjHbIRJ6LbR3LoGdYTHHB72eh2NT:3vX22SsaNYfdPBldt6+dBcjHbIRJ6d

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.43.153:4782

Mutex

429a52df-3422-4acc-8faa-0966f3bfcf1c

Attributes

encryption_key
CCD08F8B971DB48D50069B79D7B2E987CB15BF90
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 3 IoCs

resource	yara_rule
behavioral1/memory/3016-1-0x00000000008D0000-0x0000000000BF4000-memory.dmp	family_quasar
behavioral1/files/0x00380000000141ab-5.dat	family_quasar
behavioral1/memory/2192-9-0x0000000000E60000-0x0000000001184000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2192	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	3016	Client-built.exe
Token: SeDebugPrivilege	2192	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2192	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2192	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2192	Client.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3016 wrote to memory of 2192	3016	Client-built.exe	28
PID 3016 wrote to memory of 2192	3016	Client-built.exe	28
PID 3016 wrote to memory of 2192	3016	Client-built.exe	28

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:3016
- 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:2192

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
cabf60cd922c090eab3479a54df85881

SHA1
2d8cac7f6d34d091fd8b3492db12ed2b03de42e1

SHA256
aaac0a15c0e347fc8be6933015f8e9293dbaf217a34ce9b57d75de1dd3f6b1af

SHA512
be7b72cd2aab15a455095677d1ce6b89c2cc7ffa64f20ffb2237f7d4f400af127dfa1ef3211463f4a7b7c6a01615c2187a98d5be01759ed5fef89b7e4de31f34

Download Submit
memory/2192-7-0x000007FEF55D0000-0x000007FEF5FBC000-memory.dmp

Filesize
9.9MB

Download
memory/2192-9-0x0000000000E60000-0x0000000001184000-memory.dmp

Filesize
3.1MB

Download
memory/2192-10-0x000007FEF55D0000-0x000007FEF5FBC000-memory.dmp

Filesize
9.9MB

Download
memory/2192-11-0x000007FEF55D0000-0x000007FEF5FBC000-memory.dmp

Filesize
9.9MB

Download
memory/3016-0-0x000007FEF55D3000-0x000007FEF55D4000-memory.dmp

Filesize
4KB

Download
memory/3016-1-0x00000000008D0000-0x0000000000BF4000-memory.dmp

Filesize
3.1MB

Download
memory/3016-2-0x000007FEF55D0000-0x000007FEF5FBC000-memory.dmp

Filesize
9.9MB

Download
memory/3016-8-0x000007FEF55D0000-0x000007FEF5FBC000-memory.dmp

Filesize
9.9MB

Download