quasar | 5f7be136679475aeabac1742ed75b13a3a6019a1e26efc07ceb199c5ad016b90

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
18-12-2024 11:19

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General

Target

Client-built.exe
Size

3.1MB
MD5

d71b9f864361e49d0274c9e18b877093
SHA1

eb621f94801e47c5e1ec03944d020f3a98c446d0
SHA256

5f7be136679475aeabac1742ed75b13a3a6019a1e26efc07ceb199c5ad016b90
SHA512

1b535c8b7ed061f035c82d95e91c1ddc7386da4d1d8b7c0d01e55b8f2acd403a9f60ae40e0c5444ce7aea50b029035a8a4c62654e819d98f690bfd7dab9bc02b
SSDEEP

49152:mvOY52fyaSZOrPWluWBuGG5g5hx7n8LioGd1CTHHB72eh2NT:mvT52fyaSZOrPWluWBDG5g5hx7ntF

Score

10^/10

quasar test spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

test

192.168.1.35:4782

Mutex

lol

Attributes

encryption_key
BA1AB307B42098FBECD193797E23C0F236DEF7E9
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
sigma

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/1620-1-0x0000000000BF0000-0x0000000000F14000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b8d-7.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
936	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	1620	Client-built.exe
Token: SeDebugPrivilege	936	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
936	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
936	Client.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1620 wrote to memory of 936	1620	Client-built.exe	82
PID 1620 wrote to memory of 936	1620	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:1620
- C:\Users\Admin\AppData\Roaming\sigma\Client.exe
  "C:\Users\Admin\AppData\Roaming\sigma\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:936

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\sigma\Client.exe

Filesize
3.1MB

MD5
d71b9f864361e49d0274c9e18b877093

SHA1
eb621f94801e47c5e1ec03944d020f3a98c446d0

SHA256
5f7be136679475aeabac1742ed75b13a3a6019a1e26efc07ceb199c5ad016b90

SHA512
1b535c8b7ed061f035c82d95e91c1ddc7386da4d1d8b7c0d01e55b8f2acd403a9f60ae40e0c5444ce7aea50b029035a8a4c62654e819d98f690bfd7dab9bc02b

Download Submit
memory/936-9-0x00007FFFF8850000-0x00007FFFF9311000-memory.dmp

Filesize
10.8MB

Download
memory/936-10-0x00007FFFF8850000-0x00007FFFF9311000-memory.dmp

Filesize
10.8MB

Download
memory/936-11-0x000000001C360000-0x000000001C3B0000-memory.dmp

Filesize
320KB

Download
memory/936-12-0x000000001C470000-0x000000001C522000-memory.dmp

Filesize
712KB

Download
memory/936-13-0x00007FFFF8850000-0x00007FFFF9311000-memory.dmp

Filesize
10.8MB

Download
memory/1620-0-0x00007FFFF8853000-0x00007FFFF8855000-memory.dmp

Filesize
8KB

Download
memory/1620-1-0x0000000000BF0000-0x0000000000F14000-memory.dmp

Filesize
3.1MB

Download
memory/1620-2-0x00007FFFF8850000-0x00007FFFF9311000-memory.dmp

Filesize
10.8MB

Download
memory/1620-8-0x00007FFFF8850000-0x00007FFFF9311000-memory.dmp

Filesize
10.8MB

Download