quasar | f9d456fe4ef2a8766105901baca30b98ed0915fdb094b1b6ba07f237000e07eb

Analysis

max time kernel
150s
max time network
135s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
27-12-2024 13:41

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

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 3 IoCs

resource	yara_rule
behavioral1/memory/2088-1-0x0000000001070000-0x0000000001394000-memory.dmp	family_quasar
behavioral1/files/0x0006000000019240-6.dat	family_quasar
behavioral1/memory/1488-9-0x0000000000B40000-0x0000000000E64000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1488	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	2088	Client-built.exe
Token: SeDebugPrivilege	1488	Steam.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1488	Steam.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1488	Steam.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2088 wrote to memory of 1488	2088	Client-built.exe	31
PID 2088 wrote to memory of 1488	2088	Client-built.exe	31
PID 2088 wrote to memory of 1488	2088	Client-built.exe	31

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:2088
- 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:1488

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Steam.exe

Filesize
3.1MB

MD5
dcd0daac1b04b33bc2d506e3d5284315

SHA1
c22253b23d8940aba947a05603c334b9bba90434

SHA256
f9d456fe4ef2a8766105901baca30b98ed0915fdb094b1b6ba07f237000e07eb

SHA512
ee05e546233b4fece0c8962a0d5a2c98e04efa5df0df2e44f65b6eb6783d5abd82d2a649ab5ffd48fc11edded9fe7121ab71a6afa06dd47600c3f39059bc98d2

Download Submit
memory/1488-8-0x000007FEF6180000-0x000007FEF6B6C000-memory.dmp

Filesize
9.9MB

Download
memory/1488-9-0x0000000000B40000-0x0000000000E64000-memory.dmp

Filesize
3.1MB

Download
memory/1488-11-0x000007FEF6180000-0x000007FEF6B6C000-memory.dmp

Filesize
9.9MB

Download
memory/1488-12-0x000007FEF6180000-0x000007FEF6B6C000-memory.dmp

Filesize
9.9MB

Download
memory/2088-0-0x000007FEF6183000-0x000007FEF6184000-memory.dmp

Filesize
4KB

Download
memory/2088-1-0x0000000001070000-0x0000000001394000-memory.dmp

Filesize
3.1MB

Download
memory/2088-2-0x000007FEF6180000-0x000007FEF6B6C000-memory.dmp

Filesize
9.9MB

Download
memory/2088-10-0x000007FEF6180000-0x000007FEF6B6C000-memory.dmp

Filesize
9.9MB

Download