quasar | fb3f86bfd12de22eead1e3a41548ec71f08664f94de7b4466027175a76969b09

Analysis

max time kernel
148s
max time network
150s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
17-10-2024 14:38

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General

Target

ImageLoggerBuilder-cleaned.exe
Size

3.1MB
MD5

3a91d47281cad7625d76ca7263223ba3
SHA1

8e8f27dae003ce7f429410e5edbc501377c64704
SHA256

fb3f86bfd12de22eead1e3a41548ec71f08664f94de7b4466027175a76969b09
SHA512

8ea8eeb2ca3bebb6c8532e746eea33ecdaabd0da0741ed00aff1e98501f4c03baf2ed315955151d558e0a27987baa84b4f802cd9d035397119f9f14f60afb617
SSDEEP

49152:M31ad6HzUFIjIiFqALZdMmu361/iRphhxUhxGNTHHB72eh2NT:M31asHzUFIjIiFqALjMmu361/0Xx

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

Aynamit-58285.portmap.io:58285

Mutex

7d6c4039-1882-4ac3-8711-9edc060091eb

Attributes

encryption_key
B414A2AEA68C8F212513170411C6C2ACB8A1A963
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
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/1864-1-0x0000000000F70000-0x0000000001290000-memory.dmp	family_quasar
behavioral1/files/0x0008000000016fdf-6.dat	family_quasar
behavioral1/memory/2328-9-0x0000000000870000-0x0000000000B90000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2328	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
1868	schtasks.exe
1920	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1864	ImageLoggerBuilder-cleaned.exe
Token: SeDebugPrivilege	2328	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2328	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1864 wrote to memory of 1868	1864	ImageLoggerBuilder-cleaned.exe	30
PID 1864 wrote to memory of 1868	1864	ImageLoggerBuilder-cleaned.exe	30
PID 1864 wrote to memory of 1868	1864	ImageLoggerBuilder-cleaned.exe	30
PID 1864 wrote to memory of 2328	1864	ImageLoggerBuilder-cleaned.exe	32
PID 1864 wrote to memory of 2328	1864	ImageLoggerBuilder-cleaned.exe	32
PID 1864 wrote to memory of 2328	1864	ImageLoggerBuilder-cleaned.exe	32
PID 2328 wrote to memory of 1920	2328	Client.exe	33
PID 2328 wrote to memory of 1920	2328	Client.exe	33
PID 2328 wrote to memory of 1920	2328	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\ImageLoggerBuilder-cleaned.exe
"C:\Users\Admin\AppData\Local\Temp\ImageLoggerBuilder-cleaned.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1864
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1868
- 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 SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2328
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1920

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

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
3a91d47281cad7625d76ca7263223ba3

SHA1
8e8f27dae003ce7f429410e5edbc501377c64704

SHA256
fb3f86bfd12de22eead1e3a41548ec71f08664f94de7b4466027175a76969b09

SHA512
8ea8eeb2ca3bebb6c8532e746eea33ecdaabd0da0741ed00aff1e98501f4c03baf2ed315955151d558e0a27987baa84b4f802cd9d035397119f9f14f60afb617

Download Submit
memory/1864-0-0x000007FEF53E3000-0x000007FEF53E4000-memory.dmp

Filesize
4KB

Download
memory/1864-1-0x0000000000F70000-0x0000000001290000-memory.dmp

Filesize
3.1MB

Download
memory/1864-2-0x000007FEF53E0000-0x000007FEF5DCC000-memory.dmp

Filesize
9.9MB

Download
memory/1864-10-0x000007FEF53E0000-0x000007FEF5DCC000-memory.dmp

Filesize
9.9MB

Download
memory/2328-8-0x000007FEF53E0000-0x000007FEF5DCC000-memory.dmp

Filesize
9.9MB

Download
memory/2328-9-0x0000000000870000-0x0000000000B90000-memory.dmp

Filesize
3.1MB

Download
memory/2328-11-0x000007FEF53E0000-0x000007FEF5DCC000-memory.dmp

Filesize
9.9MB

Download
memory/2328-12-0x000007FEF53E0000-0x000007FEF5DCC000-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