quasar | fb3f86bfd12de22eead1e3a41548ec71f08664f94de7b4466027175a76969b09

Analysis

max time kernel
146s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-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 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3892-1-0x0000000000610000-0x0000000000930000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023cd5-6.dat	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid	Process
3680	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

Processes:

schtasks.exeschtasks.exe

pid	Process
3660	schtasks.exe
2504	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

ImageLoggerBuilder-cleaned.exeClient.exe

description	pid	Process
Token: SeDebugPrivilege	3892	ImageLoggerBuilder-cleaned.exe
Token: SeDebugPrivilege	3680	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid	Process
3680	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

ImageLoggerBuilder-cleaned.exeClient.exe

description	pid	Process	procid_target
PID 3892 wrote to memory of 3660	3892	ImageLoggerBuilder-cleaned.exe	89
PID 3892 wrote to memory of 3660	3892	ImageLoggerBuilder-cleaned.exe	89
PID 3892 wrote to memory of 3680	3892	ImageLoggerBuilder-cleaned.exe	91
PID 3892 wrote to memory of 3680	3892	ImageLoggerBuilder-cleaned.exe	91
PID 3680 wrote to memory of 2504	3680	Client.exe	92
PID 3680 wrote to memory of 2504	3680	Client.exe	92

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:3892
- 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:3660
- 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:3680
- - 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:2504

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/3680-9-0x00007FFBF2980000-0x00007FFBF3441000-memory.dmp

Filesize
10.8MB

Download
memory/3680-11-0x00007FFBF2980000-0x00007FFBF3441000-memory.dmp

Filesize
10.8MB

Download
memory/3680-12-0x000000001B7F0000-0x000000001B840000-memory.dmp

Filesize
320KB

Download
memory/3680-13-0x000000001B900000-0x000000001B9B2000-memory.dmp

Filesize
712KB

Download
memory/3680-14-0x00007FFBF2980000-0x00007FFBF3441000-memory.dmp

Filesize
10.8MB

Download
memory/3892-0-0x00007FFBF2983000-0x00007FFBF2985000-memory.dmp

Filesize
8KB

Download
memory/3892-1-0x0000000000610000-0x0000000000930000-memory.dmp

Filesize
3.1MB

Download
memory/3892-2-0x00007FFBF2980000-0x00007FFBF3441000-memory.dmp

Filesize
10.8MB

Download
memory/3892-10-0x00007FFBF2980000-0x00007FFBF3441000-memory.dmp

Filesize
10.8MB

Download