quasar | 695bc096a65c4bd026b95d5363a4b9c316cec8fec3672808e036081397da6df8

General

Target

695bc096a65c4bd026b95d5363a4b9c316cec8fec3672808e036081397da6df8.exe
Size

3.1MB
MD5

fc6a9a66fb9a404078fe5c31d73c3bab
SHA1

2cfb6b088ed8ab7ca66299d094813ce2d04e5677
SHA256

695bc096a65c4bd026b95d5363a4b9c316cec8fec3672808e036081397da6df8
SHA512

5edd45b69ca36e87ae399eb8260eb47411575a7b8296007b948b8a7c4b8200c0bda115cd223029bf39095d64a5e1c0dbd381d4b6947a67560e0a9142e18a642f
SSDEEP

49152:3vFt62XlaSFNWPjljiFa2RoUYIDew65Bxz/oGdVaTHHB72eh2NT:3v362XlaSFNWPjljiFXRoUYIZ6d

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

104.251.123.245:23600

Mutex

4119a2e0-4ae4-4843-8534-99af91a2475d

Attributes

encryption_key
DF6316067206E09C1F85138FCEBD56F5D94BF6AE
install_name
Client.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/548-1-0x0000000000EE0000-0x0000000001208000-memory.dmp	family_quasar
behavioral1/files/0x0008000000016d2e-5.dat	family_quasar
behavioral1/memory/2224-8-0x00000000008C0000-0x0000000000BE8000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2224	Client.exe

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
2144	schtasks.exe
1052	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	548	695bc096a65c4bd026b95d5363a4b9c316cec8fec3672808e036081397da6df8.exe
Token: SeDebugPrivilege	2224	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2224	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2224	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2224	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 548 wrote to memory of 1052	548	695bc096a65c4bd026b95d5363a4b9c316cec8fec3672808e036081397da6df8.exe	31
PID 548 wrote to memory of 1052	548	695bc096a65c4bd026b95d5363a4b9c316cec8fec3672808e036081397da6df8.exe	31
PID 548 wrote to memory of 1052	548	695bc096a65c4bd026b95d5363a4b9c316cec8fec3672808e036081397da6df8.exe	31
PID 548 wrote to memory of 2224	548	695bc096a65c4bd026b95d5363a4b9c316cec8fec3672808e036081397da6df8.exe	33
PID 548 wrote to memory of 2224	548	695bc096a65c4bd026b95d5363a4b9c316cec8fec3672808e036081397da6df8.exe	33
PID 548 wrote to memory of 2224	548	695bc096a65c4bd026b95d5363a4b9c316cec8fec3672808e036081397da6df8.exe	33
PID 2224 wrote to memory of 2144	2224	Client.exe	34
PID 2224 wrote to memory of 2144	2224	Client.exe	34
PID 2224 wrote to memory of 2144	2224	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\695bc096a65c4bd026b95d5363a4b9c316cec8fec3672808e036081397da6df8.exe
"C:\Users\Admin\AppData\Local\Temp\695bc096a65c4bd026b95d5363a4b9c316cec8fec3672808e036081397da6df8.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:548
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1052
- 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:2224
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2144

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
3.1MB

MD5
fc6a9a66fb9a404078fe5c31d73c3bab

SHA1
2cfb6b088ed8ab7ca66299d094813ce2d04e5677

SHA256
695bc096a65c4bd026b95d5363a4b9c316cec8fec3672808e036081397da6df8

SHA512
5edd45b69ca36e87ae399eb8260eb47411575a7b8296007b948b8a7c4b8200c0bda115cd223029bf39095d64a5e1c0dbd381d4b6947a67560e0a9142e18a642f

Download Submit
memory/548-0-0x000007FEF5D23000-0x000007FEF5D24000-memory.dmp

Filesize
4KB

Download
memory/548-1-0x0000000000EE0000-0x0000000001208000-memory.dmp

Filesize
3.2MB

Download
memory/548-2-0x000007FEF5D20000-0x000007FEF670C000-memory.dmp

Filesize
9.9MB

Download
memory/548-9-0x000007FEF5D20000-0x000007FEF670C000-memory.dmp

Filesize
9.9MB

Download
memory/2224-7-0x000007FEF5D20000-0x000007FEF670C000-memory.dmp

Filesize
9.9MB

Download
memory/2224-8-0x00000000008C0000-0x0000000000BE8000-memory.dmp

Filesize
3.2MB

Download
memory/2224-10-0x000007FEF5D20000-0x000007FEF670C000-memory.dmp

Filesize
9.9MB

Download
memory/2224-11-0x000007FEF5D20000-0x000007FEF670C000-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