quasar | 0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea

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

C2

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/3068-1-0x0000000000160000-0x0000000000484000-memory.dmp	family_quasar
behavioral1/files/0x000700000001868b-6.dat	family_quasar
behavioral1/memory/2720-10-0x0000000000A70000-0x0000000000D94000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2720	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
2556	schtasks.exe
2724	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3068	0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe
Token: SeDebugPrivilege	2720	Client1.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2720	Client1.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2720	Client1.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2720	Client1.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3068 wrote to memory of 2724	3068	0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe	30
PID 3068 wrote to memory of 2724	3068	0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe	30
PID 3068 wrote to memory of 2724	3068	0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe	30
PID 3068 wrote to memory of 2720	3068	0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe	32
PID 3068 wrote to memory of 2720	3068	0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe	32
PID 3068 wrote to memory of 2720	3068	0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe	32
PID 2720 wrote to memory of 2556	2720	Client1.exe	33
PID 2720 wrote to memory of 2556	2720	Client1.exe	33
PID 2720 wrote to memory of 2556	2720	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:3068
- 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:2724
- 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:2720
- - 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:2556

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

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/2720-9-0x000007FEF4E30000-0x000007FEF581C000-memory.dmp

Filesize
9.9MB

Download
memory/2720-10-0x0000000000A70000-0x0000000000D94000-memory.dmp

Filesize
3.1MB

Download
memory/2720-11-0x000007FEF4E30000-0x000007FEF581C000-memory.dmp

Filesize
9.9MB

Download
memory/2720-12-0x000007FEF4E30000-0x000007FEF581C000-memory.dmp

Filesize
9.9MB

Download
memory/3068-0-0x000007FEF4E33000-0x000007FEF4E34000-memory.dmp

Filesize
4KB

Download
memory/3068-1-0x0000000000160000-0x0000000000484000-memory.dmp

Filesize
3.1MB

Download
memory/3068-2-0x000007FEF4E30000-0x000007FEF581C000-memory.dmp

Filesize
9.9MB

Download
memory/3068-8-0x000007FEF4E30000-0x000007FEF581C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads