quasar | 445933fc1bdf9469526b8b84c5d6453d1db0d7fefe24bf50af987e1dabc60c78

Analysis

max time kernel
147s
max time network
148s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
03-02-2025 05:16

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General

Target

Client-built.exe
Size

3.1MB
MD5

6d548f65275db48621c739026edba1d6
SHA1

7e8f3e64920984e407cfa5d257e67bfb885c67d8
SHA256

445933fc1bdf9469526b8b84c5d6453d1db0d7fefe24bf50af987e1dabc60c78
SHA512

c18b1593def2a6a1834016c61ba3be0bcd5e8dc37a5a889f1cbb924a252548ce3a5ac618a17c20112109015d509933a6a9c6823e437bf0e400f196de4f91266a
SSDEEP

49152:rvOI22SsaNYfdPBldt698dBcjHxuRJ6PbR3LoGdsnTHHB72eh2NT:rvj22SsaNYfdPBldt6+dBcjHxuRJ6h

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

5.252.74.51:1337

Mutex

c9ab7a3b-f343-40bc-bf8b-f072c9beccf5

Attributes

encryption_key
22D8B6518A5AB3703F6FD0075F58F8B4DB404298
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/2252-1-0x00000000003A0000-0x00000000006C4000-memory.dmp	family_quasar
behavioral1/files/0x0034000000016d17-6.dat	family_quasar
behavioral1/memory/2092-8-0x00000000001E0000-0x0000000000504000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2092	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	2252	Client-built.exe
Token: SeDebugPrivilege	2092	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2092	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2092	Client.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2252 wrote to memory of 2092	2252	Client-built.exe	28
PID 2252 wrote to memory of 2092	2252	Client-built.exe	28
PID 2252 wrote to memory of 2092	2252	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:2252
- 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:2092

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
6d548f65275db48621c739026edba1d6

SHA1
7e8f3e64920984e407cfa5d257e67bfb885c67d8

SHA256
445933fc1bdf9469526b8b84c5d6453d1db0d7fefe24bf50af987e1dabc60c78

SHA512
c18b1593def2a6a1834016c61ba3be0bcd5e8dc37a5a889f1cbb924a252548ce3a5ac618a17c20112109015d509933a6a9c6823e437bf0e400f196de4f91266a

Download Submit
memory/2092-9-0x000007FEFF0B0000-0x000007FEFF14F000-memory.dmp

Filesize
636KB

Download
memory/2092-8-0x00000000001E0000-0x0000000000504000-memory.dmp

Filesize
3.1MB

Download
memory/2092-7-0x000007FEFF0B0000-0x000007FEFF14F000-memory.dmp

Filesize
636KB

Download
memory/2092-11-0x000007FEFF0B0000-0x000007FEFF14F000-memory.dmp

Filesize
636KB

Download
memory/2252-0-0x000007FEFF0B0000-0x000007FEFF14F000-memory.dmp

Filesize
636KB

Download
memory/2252-1-0x00000000003A0000-0x00000000006C4000-memory.dmp

Filesize
3.1MB

Download
memory/2252-2-0x000007FEFF0B0000-0x000007FEFF14F000-memory.dmp

Filesize
636KB

Download
memory/2252-10-0x000007FEFF0B0000-0x000007FEFF14F000-memory.dmp

Filesize
636KB

Download