quasar | be1aee7f2f23134ba2fb4f2d05a5c5819518f88ccaba7fcbf2524ceda72f6ff5

General

Target

be1aee7f2f23134ba2fb4f2d05a5c5819518f88ccaba7fcbf2524ceda72f6ff5.exe
Size

3.1MB
MD5

37d9cc2f98c4cbfea148c153ead3d63d
SHA1

67245419711e511b4b06836526dd3eca8296f7d2
SHA256

be1aee7f2f23134ba2fb4f2d05a5c5819518f88ccaba7fcbf2524ceda72f6ff5
SHA512

8a1b6398f30afa7c023d501f149a22d66ea134ab0ba381f1dc4f5c99d03270aac65971f4d7bef66a9d290eda3b4484a17a4a08f82c331201001423f8cb21929e
SSDEEP

49152:avBt62XlaSFNWPjljiFa2RoUYIXxOEMktk/JxfoGdcTHHB72eh2NT:avr62XlaSFNWPjljiFXRoUYIXxwl

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.0.120:4782

Mutex

9fde5542-6125-4272-a814-17dab286fa9f

Attributes

encryption_key
7D71500E67A8C0039FEB5CC2A22FA4DAC65EF711
install_name
Temp.exe
log_directory
Logs
reconnect_delay
3000
startup_key
svchost
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 3 IoCs

resource	yara_rule
behavioral1/memory/3016-1-0x0000000000810000-0x0000000000B34000-memory.dmp	family_quasar
behavioral1/files/0x003400000001508a-6.dat	family_quasar
behavioral1/memory/3048-10-0x0000000000CE0000-0x0000000001004000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3048	Temp.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\system32\SubDir\Temp.exe	be1aee7f2f23134ba2fb4f2d05a5c5819518f88ccaba7fcbf2524ceda72f6ff5.exe
File opened for modification	C:\Windows\system32\SubDir\Temp.exe	be1aee7f2f23134ba2fb4f2d05a5c5819518f88ccaba7fcbf2524ceda72f6ff5.exe
File opened for modification	C:\Windows\system32\SubDir	be1aee7f2f23134ba2fb4f2d05a5c5819518f88ccaba7fcbf2524ceda72f6ff5.exe
File opened for modification	C:\Windows\system32\SubDir\Temp.exe	Temp.exe
File opened for modification	C:\Windows\system32\SubDir	Temp.exe

Creates scheduled task(s) 1 TTPs 2 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
2156	schtasks.exe
2640	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3016	be1aee7f2f23134ba2fb4f2d05a5c5819518f88ccaba7fcbf2524ceda72f6ff5.exe
Token: SeDebugPrivilege	3048	Temp.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3048	Temp.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3016 wrote to memory of 2156	3016	be1aee7f2f23134ba2fb4f2d05a5c5819518f88ccaba7fcbf2524ceda72f6ff5.exe	28
PID 3016 wrote to memory of 2156	3016	be1aee7f2f23134ba2fb4f2d05a5c5819518f88ccaba7fcbf2524ceda72f6ff5.exe	28
PID 3016 wrote to memory of 2156	3016	be1aee7f2f23134ba2fb4f2d05a5c5819518f88ccaba7fcbf2524ceda72f6ff5.exe	28
PID 3016 wrote to memory of 3048	3016	be1aee7f2f23134ba2fb4f2d05a5c5819518f88ccaba7fcbf2524ceda72f6ff5.exe	30
PID 3016 wrote to memory of 3048	3016	be1aee7f2f23134ba2fb4f2d05a5c5819518f88ccaba7fcbf2524ceda72f6ff5.exe	30
PID 3016 wrote to memory of 3048	3016	be1aee7f2f23134ba2fb4f2d05a5c5819518f88ccaba7fcbf2524ceda72f6ff5.exe	30
PID 3048 wrote to memory of 2640	3048	Temp.exe	31
PID 3048 wrote to memory of 2640	3048	Temp.exe	31
PID 3048 wrote to memory of 2640	3048	Temp.exe	31

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\be1aee7f2f23134ba2fb4f2d05a5c5819518f88ccaba7fcbf2524ceda72f6ff5.exe
"C:\Users\Admin\AppData\Local\Temp\be1aee7f2f23134ba2fb4f2d05a5c5819518f88ccaba7fcbf2524ceda72f6ff5.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3016
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Temp.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:2156
- C:\Windows\system32\SubDir\Temp.exe
  "C:\Windows\system32\SubDir\Temp.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3048
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Temp.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:2640

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\System32\SubDir\Temp.exe

Filesize
3.1MB

MD5
37d9cc2f98c4cbfea148c153ead3d63d

SHA1
67245419711e511b4b06836526dd3eca8296f7d2

SHA256
be1aee7f2f23134ba2fb4f2d05a5c5819518f88ccaba7fcbf2524ceda72f6ff5

SHA512
8a1b6398f30afa7c023d501f149a22d66ea134ab0ba381f1dc4f5c99d03270aac65971f4d7bef66a9d290eda3b4484a17a4a08f82c331201001423f8cb21929e

Download Submit
memory/3016-0-0x000007FEF56F3000-0x000007FEF56F4000-memory.dmp

Filesize
4KB

Download
memory/3016-1-0x0000000000810000-0x0000000000B34000-memory.dmp

Filesize
3.1MB

Download
memory/3016-2-0x000007FEF56F0000-0x000007FEF60DC000-memory.dmp

Filesize
9.9MB

Download
memory/3016-9-0x000007FEF56F0000-0x000007FEF60DC000-memory.dmp

Filesize
9.9MB

Download
memory/3048-8-0x000007FEF56F0000-0x000007FEF60DC000-memory.dmp

Filesize
9.9MB

Download
memory/3048-10-0x0000000000CE0000-0x0000000001004000-memory.dmp

Filesize
3.1MB

Download
memory/3048-11-0x000007FEF56F0000-0x000007FEF60DC000-memory.dmp

Filesize
9.9MB

Download
memory/3048-12-0x000007FEF56F0000-0x000007FEF60DC000-memory.dmp

Filesize
9.9MB

Download
memory/3048-13-0x000007FEF56F0000-0x000007FEF60DC000-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