quasar | 5420cbc5d6be7831ccd48e8c7860f7d5c1060db80ed82063258f81c777aca8f1

General

Target

5420cbc5d6be7831ccd48e8c7860f7d5c1060db80ed82063258f81c777aca8f1.exe
Size

3.1MB
MD5

2fd750229aa6122c30607bb59293a909
SHA1

0feb9d22c13e6c2d19942788a49721db23e48d35
SHA256

5420cbc5d6be7831ccd48e8c7860f7d5c1060db80ed82063258f81c777aca8f1
SHA512

772b515f3efcff2a0fde47c125f9531d50028394a6c758e45e54743298714d118edaa94c6a67034a8a1cdce06f68342acee5b0fc0bc5ca610d28e8b8a6f52dec
SSDEEP

49152:Dvht62XlaSFNWPjljiFa2RoUYImsRJ6abR3LoGdlTHHB72eh2NT:DvL62XlaSFNWPjljiFXRoUYImsRJ60

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

0.tcp.us-cal-1.ngrok.io:11837

Mutex

11bbf22e-826e-486b-b024-adbd86228a9e

Attributes

encryption_key
7A589EDBC6A581E125BF830EF0D05FC74BB75E30
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
ctfmon
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/2068-1-0x0000000000C60000-0x0000000000F84000-memory.dmp	family_quasar
behavioral1/files/0x0007000000015d81-7.dat	family_quasar
behavioral1/memory/2268-10-0x0000000001390000-0x00000000016B4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2268	Client.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service

T1102

flow	ioc
2	0.tcp.us-cal-1.ngrok.io
15	0.tcp.us-cal-1.ngrok.io
28	0.tcp.us-cal-1.ngrok.io

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
1820	schtasks.exe
3048	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2068	5420cbc5d6be7831ccd48e8c7860f7d5c1060db80ed82063258f81c777aca8f1.exe
Token: SeDebugPrivilege	2268	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2268	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2268	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2268	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2068 wrote to memory of 1820	2068	5420cbc5d6be7831ccd48e8c7860f7d5c1060db80ed82063258f81c777aca8f1.exe	30
PID 2068 wrote to memory of 1820	2068	5420cbc5d6be7831ccd48e8c7860f7d5c1060db80ed82063258f81c777aca8f1.exe	30
PID 2068 wrote to memory of 1820	2068	5420cbc5d6be7831ccd48e8c7860f7d5c1060db80ed82063258f81c777aca8f1.exe	30
PID 2068 wrote to memory of 2268	2068	5420cbc5d6be7831ccd48e8c7860f7d5c1060db80ed82063258f81c777aca8f1.exe	32
PID 2068 wrote to memory of 2268	2068	5420cbc5d6be7831ccd48e8c7860f7d5c1060db80ed82063258f81c777aca8f1.exe	32
PID 2068 wrote to memory of 2268	2068	5420cbc5d6be7831ccd48e8c7860f7d5c1060db80ed82063258f81c777aca8f1.exe	32
PID 2268 wrote to memory of 3048	2268	Client.exe	33
PID 2268 wrote to memory of 3048	2268	Client.exe	33
PID 2268 wrote to memory of 3048	2268	Client.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\5420cbc5d6be7831ccd48e8c7860f7d5c1060db80ed82063258f81c777aca8f1.exe
"C:\Users\Admin\AppData\Local\Temp\5420cbc5d6be7831ccd48e8c7860f7d5c1060db80ed82063258f81c777aca8f1.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2068
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "ctfmon" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1820
- 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:2268
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "ctfmon" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3048

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

Web Service

1

T1102

Exfiltration

Impact

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Downloads

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

Filesize
3.1MB

MD5
2fd750229aa6122c30607bb59293a909

SHA1
0feb9d22c13e6c2d19942788a49721db23e48d35

SHA256
5420cbc5d6be7831ccd48e8c7860f7d5c1060db80ed82063258f81c777aca8f1

SHA512
772b515f3efcff2a0fde47c125f9531d50028394a6c758e45e54743298714d118edaa94c6a67034a8a1cdce06f68342acee5b0fc0bc5ca610d28e8b8a6f52dec

Download Submit
memory/2068-0-0x000007FEF5883000-0x000007FEF5884000-memory.dmp

Filesize
4KB

Download
memory/2068-1-0x0000000000C60000-0x0000000000F84000-memory.dmp

Filesize
3.1MB

Download
memory/2068-2-0x000007FEF5880000-0x000007FEF626C000-memory.dmp

Filesize
9.9MB

Download
memory/2068-8-0x000007FEF5880000-0x000007FEF626C000-memory.dmp

Filesize
9.9MB

Download
memory/2268-9-0x000007FEF5880000-0x000007FEF626C000-memory.dmp

Filesize
9.9MB

Download
memory/2268-10-0x0000000001390000-0x00000000016B4000-memory.dmp

Filesize
3.1MB

Download
memory/2268-11-0x000007FEF5880000-0x000007FEF626C000-memory.dmp

Filesize
9.9MB

Download
memory/2268-12-0x000007FEF5880000-0x000007FEF626C000-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