quasar | f9d456fe4ef2a8766105901baca30b98ed0915fdb094b1b6ba07f237000e07eb

Analysis

max time kernel
15s
max time network
16s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
27-12-2024 13:39

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General

Target

Client-built.exe
Size

3.1MB
MD5

dcd0daac1b04b33bc2d506e3d5284315
SHA1

c22253b23d8940aba947a05603c334b9bba90434
SHA256

f9d456fe4ef2a8766105901baca30b98ed0915fdb094b1b6ba07f237000e07eb
SHA512

ee05e546233b4fece0c8962a0d5a2c98e04efa5df0df2e44f65b6eb6783d5abd82d2a649ab5ffd48fc11edded9fe7121ab71a6afa06dd47600c3f39059bc98d2
SSDEEP

49152:qvKI22SsaNYfdPBldt698dBcjHU0PwoGgaqTHHB72eh2NT:qvn22SsaNYfdPBldt6+dBcjHU0Y

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

82.65.100.165:4782

Mutex

928cdf3a-3032-4b22-91e0-f19a9909e850

Attributes

encryption_key
BD45D1FA0A6C09E8103287010069AC867E656C61
install_name
Steam.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
behavioral1/memory/5036-1-0x0000000000310000-0x0000000000634000-memory.dmp	family_quasar
behavioral1/files/0x0007000000023c67-7.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4016	Steam.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	5036	Client-built.exe
Token: SeDebugPrivilege	4016	Steam.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4016	Steam.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4016	Steam.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 5036 wrote to memory of 4016	5036	Client-built.exe	85
PID 5036 wrote to memory of 4016	5036	Client-built.exe	85

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:5036
- C:\Users\Admin\AppData\Roaming\SubDir\Steam.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Steam.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:4016

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\Steam.exe

Filesize
3.1MB

MD5
dcd0daac1b04b33bc2d506e3d5284315

SHA1
c22253b23d8940aba947a05603c334b9bba90434

SHA256
f9d456fe4ef2a8766105901baca30b98ed0915fdb094b1b6ba07f237000e07eb

SHA512
ee05e546233b4fece0c8962a0d5a2c98e04efa5df0df2e44f65b6eb6783d5abd82d2a649ab5ffd48fc11edded9fe7121ab71a6afa06dd47600c3f39059bc98d2

Download Submit
memory/4016-9-0x00007FFD8D670000-0x00007FFD8E131000-memory.dmp

Filesize
10.8MB

Download
memory/4016-11-0x00007FFD8D670000-0x00007FFD8E131000-memory.dmp

Filesize
10.8MB

Download
memory/4016-12-0x000000001C380000-0x000000001C3D0000-memory.dmp

Filesize
320KB

Download
memory/4016-13-0x000000001C490000-0x000000001C542000-memory.dmp

Filesize
712KB

Download
memory/4016-14-0x00007FFD8D670000-0x00007FFD8E131000-memory.dmp

Filesize
10.8MB

Download
memory/5036-0-0x00007FFD8D673000-0x00007FFD8D675000-memory.dmp

Filesize
8KB

Download
memory/5036-1-0x0000000000310000-0x0000000000634000-memory.dmp

Filesize
3.1MB

Download
memory/5036-2-0x00007FFD8D670000-0x00007FFD8E131000-memory.dmp

Filesize
10.8MB

Download
memory/5036-10-0x00007FFD8D670000-0x00007FFD8E131000-memory.dmp

Filesize
10.8MB

Download