quasar | cc68b1903e22d22e6f0a29bcdf46825d5c57747d8eb3a75672a4d6930f60fe77 | Triage

Analysis

max time kernel
146s
max time network
148s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
13/12/2024, 10:07 UTC

Sharing

Report Analysis Logs

General

Target

testingfile.exe
Size

3.1MB
MD5

4489c3282400ad9e96ea5ca7c28e6369
SHA1

91a2016778cce0e880636d236efca38cf0a7713d
SHA256

cc68b1903e22d22e6f0a29bcdf46825d5c57747d8eb3a75672a4d6930f60fe77
SHA512

adaeab8aa666057ff008e86f96ae6b9a36ff2f276fdd49f6663c300357f3dc10f59fac7700bb385aa35887918a830e18bddaa41b3305d913566f58aa428a72b0
SSDEEP

49152:fvmI22SsaNYfdPBldt698dBcjH+ixNESEtk/i/LoGdCUTHHB72eh2NT:fvr22SsaNYfdPBldt6+dBcjHTx0D

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

testinghigger-42471.portmap.host:42471

Mutex

7a5f2afa-38ce-4bed-8e42-d1108199a2b3

Attributes

encryption_key
0F8B61E5223AD57FA54A04631691138A0F76FAE4
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
wod2
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/2320-1-0x0000000000080000-0x00000000003A4000-memory.dmp	family_quasar
behavioral1/files/0x0008000000016276-6.dat	family_quasar
behavioral1/memory/2396-10-0x0000000000EF0000-0x0000000001214000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2396	Client.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

pid	Process
2184	schtasks.exe
2432	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2320	testingfile.exe
Token: SeDebugPrivilege	2396	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2396	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2396	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2396	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2320 wrote to memory of 2184	2320	testingfile.exe	31
PID 2320 wrote to memory of 2184	2320	testingfile.exe	31
PID 2320 wrote to memory of 2184	2320	testingfile.exe	31
PID 2320 wrote to memory of 2396	2320	testingfile.exe	33
PID 2320 wrote to memory of 2396	2320	testingfile.exe	33
PID 2320 wrote to memory of 2396	2320	testingfile.exe	33
PID 2396 wrote to memory of 2432	2396	Client.exe	34
PID 2396 wrote to memory of 2432	2396	Client.exe	34
PID 2396 wrote to memory of 2432	2396	Client.exe	34

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\testingfile.exe
"C:\Users\Admin\AppData\Local\Temp\testingfile.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2320
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "wod2" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2184
- 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
  - Suspicious use of WriteProcessMemory
  PID:2396
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "wod2" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2432

Network

DNS

testinghigger-42471.portmap.host

Client.exe

Remote address:

8.8.8.8:53

Request

testinghigger-42471.portmap.host

IN A

Response

testinghigger-42471.portmap.host

IN A

193.161.193.99

193.161.193.99:42471

testinghigger-42471.portmap.host

tls

Client.exe

363 B
549 B
5
3
193.161.193.99:42471

testinghigger-42471.portmap.host

tls

Client.exe

363 B
549 B
5
3
193.161.193.99:42471

testinghigger-42471.portmap.host

tls

Client.exe

363 B
549 B
5
3
193.161.193.99:42471

testinghigger-42471.portmap.host

tls

Client.exe

363 B
549 B
5
3
193.161.193.99:42471

testinghigger-42471.portmap.host

tls

Client.exe

363 B
549 B
5
3
193.161.193.99:42471

testinghigger-42471.portmap.host

tls

Client.exe

363 B
549 B
5
3
193.161.193.99:42471

testinghigger-42471.portmap.host

tls

Client.exe

363 B
549 B
5
3
193.161.193.99:42471

testinghigger-42471.portmap.host

tls

Client.exe

409 B
1.0kB
6
4
193.161.193.99:42471

testinghigger-42471.portmap.host

tls

Client.exe

363 B
549 B
5
3
193.161.193.99:42471

testinghigger-42471.portmap.host

tls

Client.exe

363 B
549 B
5
3
193.161.193.99:42471

testinghigger-42471.portmap.host

tls

Client.exe

415 B
549 B
6
3
193.161.193.99:42471

testinghigger-42471.portmap.host

tls

Client.exe

409 B
1.0kB
6
4
193.161.193.99:42471

testinghigger-42471.portmap.host

Client.exe

244 B
104 B
5
2
193.161.193.99:42471

testinghigger-42471.portmap.host

tls

Client.exe

561 B
1.1kB
9
5
193.161.193.99:42471

testinghigger-42471.portmap.host

tls

Client.exe

415 B
549 B
6
3
193.161.193.99:42471

testinghigger-42471.portmap.host

tls

Client.exe

457 B
1.1kB
7
5
193.161.193.99:42471

testinghigger-42471.portmap.host

tls

Client.exe

461 B
1.1kB
7
5
193.161.193.99:42471

testinghigger-42471.portmap.host

tls

Client.exe

363 B
549 B
5
3
193.161.193.99:42471

testinghigger-42471.portmap.host

tls

Client.exe

461 B
1.1kB
7
5
193.161.193.99:42471

testinghigger-42471.portmap.host

tls

Client.exe

363 B
549 B
5
3
193.161.193.99:42471

testinghigger-42471.portmap.host

tls

Client.exe

409 B
1.0kB
6
4
193.161.193.99:42471

testinghigger-42471.portmap.host

tls

Client.exe

680 B
1.1kB
9
6
193.161.193.99:42471

testinghigger-42471.portmap.host

tls

Client.exe

363 B
549 B
5
3

8.8.8.8:53

testinghigger-42471.portmap.host

dns

Client.exe

78 B
94 B
1
1

DNS Request

testinghigger-42471.portmap.host

DNS Response

193.161.193.99

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Scheduled Task

Persistence

Scheduled Task/Job

Scheduled Task

Privilege Escalation

Scheduled Task/Job

Scheduled Task

Defense Evasion

Credential Access

Discovery

Query Registry

System Information Discovery

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
4489c3282400ad9e96ea5ca7c28e6369

SHA1
91a2016778cce0e880636d236efca38cf0a7713d

SHA256
cc68b1903e22d22e6f0a29bcdf46825d5c57747d8eb3a75672a4d6930f60fe77

SHA512
adaeab8aa666057ff008e86f96ae6b9a36ff2f276fdd49f6663c300357f3dc10f59fac7700bb385aa35887918a830e18bddaa41b3305d913566f58aa428a72b0

Download Submit
memory/2320-0-0x000007FEF5E03000-0x000007FEF5E04000-memory.dmp

Filesize
4KB

Download
memory/2320-1-0x0000000000080000-0x00000000003A4000-memory.dmp

Filesize
3.1MB

Download
memory/2320-2-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

Filesize
9.9MB

Download
memory/2320-9-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

Filesize
9.9MB

Download
memory/2396-8-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

Filesize
9.9MB

Download
memory/2396-10-0x0000000000EF0000-0x0000000001214000-memory.dmp

Filesize
3.1MB

Download
memory/2396-11-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

Filesize
9.9MB

Download
memory/2396-12-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

Filesize
9.9MB

Download