quasar | 0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea

Resubmissions

17-12-2024 18:05

241217-wpd3nstmbx 10

17-12-2024 16:07

241217-tkwqtatmhl 10

Analysis

max time kernel
126s
max time network
136s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
17-12-2024 16:07

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General

Target

0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe
Size

3.1MB
MD5

cff3e677b6383632eff6d1b52cd6d277
SHA1

0936fb4aa7e39f2b56bc1b4c9364bb95e8f0c2a8
SHA256

0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea
SHA512

ddc33da48cf00e6ee4a57a07a98630082082f5cf76b9c1f844b17ff7f8328f0986a0d95f458947c6ca141a657991b31c608d9b3a9bdc83428ee53e55a34c2e61
SSDEEP

49152:6vht62XlaSFNWPjljiFa2RoUYIz0HxNESEqk/iGLoGd1THHB72eh2NT:6vL62XlaSFNWPjljiFXRoUYI4HxlI

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

73.62.14.5:4782

Mutex

3aaa11be-d135-4877-a61e-c409c29a7a60

Attributes

encryption_key
BC9162791FD860195CF75664AE64885B64D5B5CE
install_name
Client1.exe
log_directory
Logs
reconnect_delay
3000
startup_key
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/620-1-0x0000000000380000-0x00000000006A4000-memory.dmp	family_quasar
behavioral1/files/0x0008000000016dbc-6.dat	family_quasar
behavioral1/memory/1940-10-0x0000000000170000-0x0000000000494000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1940	Client1.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

T1053.005

pid	Process
3008	schtasks.exe
2788	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	620	0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe
Token: SeDebugPrivilege	1940	Client1.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1940	Client1.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1940	Client1.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1940	Client1.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 620 wrote to memory of 3008	620	0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe	30
PID 620 wrote to memory of 3008	620	0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe	30
PID 620 wrote to memory of 3008	620	0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe	30
PID 620 wrote to memory of 1940	620	0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe	32
PID 620 wrote to memory of 1940	620	0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe	32
PID 620 wrote to memory of 1940	620	0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe	32
PID 1940 wrote to memory of 2788	1940	Client1.exe	33
PID 1940 wrote to memory of 2788	1940	Client1.exe	33
PID 1940 wrote to memory of 2788	1940	Client1.exe	33

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\0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe
"C:\Users\Admin\AppData\Local\Temp\0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:620
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client1.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3008
- C:\Users\Admin\AppData\Roaming\SubDir\Client1.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client1.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:1940
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client1.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2788

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client1.exe

Filesize
3.1MB

MD5
cff3e677b6383632eff6d1b52cd6d277

SHA1
0936fb4aa7e39f2b56bc1b4c9364bb95e8f0c2a8

SHA256
0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea

SHA512
ddc33da48cf00e6ee4a57a07a98630082082f5cf76b9c1f844b17ff7f8328f0986a0d95f458947c6ca141a657991b31c608d9b3a9bdc83428ee53e55a34c2e61

Download Submit
memory/620-0-0x000007FEF5D93000-0x000007FEF5D94000-memory.dmp

Filesize
4KB

Download
memory/620-1-0x0000000000380000-0x00000000006A4000-memory.dmp

Filesize
3.1MB

Download
memory/620-2-0x000007FEF5D90000-0x000007FEF677C000-memory.dmp

Filesize
9.9MB

Download
memory/620-8-0x000007FEF5D90000-0x000007FEF677C000-memory.dmp

Filesize
9.9MB

Download
memory/1940-10-0x0000000000170000-0x0000000000494000-memory.dmp

Filesize
3.1MB

Download
memory/1940-9-0x000007FEF5D90000-0x000007FEF677C000-memory.dmp

Filesize
9.9MB

Download
memory/1940-11-0x000007FEF5D90000-0x000007FEF677C000-memory.dmp

Filesize
9.9MB

Download
memory/1940-12-0x000007FEF5D90000-0x000007FEF677C000-memory.dmp

Filesize
9.9MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads