quasar | 8a31693ddf8924f144ba19a8802766188bd13f1ed7eea7c226eb0e01a9e47685

Analysis

max time kernel
134s
max time network
134s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
23-11-2024 04:21

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

PORQUEPUTASYANOSIRVE.7z
Size

923KB
MD5

d757d40193d311216967491e36fc2ba4
SHA1

2dd90fa74c489da4f85bdf301053230b480a31fa
SHA256

8a31693ddf8924f144ba19a8802766188bd13f1ed7eea7c226eb0e01a9e47685
SHA512

9be26ab222457605eea0c42a4dbcfa80154cb384e6abf0db6a010fcca172a0eda8792b9e3fff9d67717f095f67448d9310c7e049f7fea8dd5907afe8bd462921
SSDEEP

24576:q9gl2kNvEE7GFdGqXsShFTAkBojKLUI56eGk:46vbIGqXscAkW+h1

Score

10^/10

quasar office04 discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

azxq0ap.localto.net:3425

Mutex

e51e2b65-e963-4051-9736-67d57ed46798

Attributes

encryption_key
AEA258EF65BF1786F0F767C0BE2497ECC304C46F
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 family
quasar

Quasar payload 2 IoCs

resource	yara_rule
behavioral1/files/0x00280000000450a1-3.dat	family_quasar
behavioral1/memory/1288-5-0x0000000000280000-0x00000000005A4000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

pid	Process
1288	PORQUEPUTASYANOSIRVE.exe
3308	Client.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SystemTemp	chrome.exe

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	chrome.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemProductName	chrome.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer	chrome.exe

Modifies data under HKEY_USERS 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Cryptography\TPM\Telemetry	chrome.exe
Set value (int)	\REGISTRY\USER\S-1-5-19\SOFTWARE\Microsoft\Cryptography\TPM\Telemetry\TraceTimeLast = "133768094542688471"	chrome.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
4868	schtasks.exe
1656	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2768	chrome.exe
2768	chrome.exe

Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 3 IoCs

pid	Process
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe

Suspicious use of AdjustPrivilegeToken 23 IoCs

description	pid	Process
Token: SeRestorePrivilege	4628	7zFM.exe
Token: 35	4628	7zFM.exe
Token: SeSecurityPrivilege	4628	7zFM.exe
Token: SeDebugPrivilege	1288	PORQUEPUTASYANOSIRVE.exe
Token: SeDebugPrivilege	3308	Client.exe
Token: SeShutdownPrivilege	2768	chrome.exe
Token: SeCreatePagefilePrivilege	2768	chrome.exe
Token: SeShutdownPrivilege	2768	chrome.exe
Token: SeCreatePagefilePrivilege	2768	chrome.exe
Token: SeShutdownPrivilege	2768	chrome.exe
Token: SeCreatePagefilePrivilege	2768	chrome.exe
Token: SeShutdownPrivilege	2768	chrome.exe
Token: SeCreatePagefilePrivilege	2768	chrome.exe
Token: SeShutdownPrivilege	2768	chrome.exe
Token: SeCreatePagefilePrivilege	2768	chrome.exe
Token: SeShutdownPrivilege	2768	chrome.exe
Token: SeCreatePagefilePrivilege	2768	chrome.exe
Token: SeShutdownPrivilege	2768	chrome.exe
Token: SeCreatePagefilePrivilege	2768	chrome.exe
Token: SeShutdownPrivilege	2768	chrome.exe
Token: SeCreatePagefilePrivilege	2768	chrome.exe
Token: SeShutdownPrivilege	2768	chrome.exe
Token: SeCreatePagefilePrivilege	2768	chrome.exe

Suspicious use of FindShellTrayWindow 28 IoCs

pid	Process
4628	7zFM.exe
4628	7zFM.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe

Suspicious use of SendNotifyMessage 24 IoCs

pid	Process
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe
2768	chrome.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3308	Client.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1288 wrote to memory of 4868	1288	PORQUEPUTASYANOSIRVE.exe	94
PID 1288 wrote to memory of 4868	1288	PORQUEPUTASYANOSIRVE.exe	94
PID 1288 wrote to memory of 3308	1288	PORQUEPUTASYANOSIRVE.exe	96
PID 1288 wrote to memory of 3308	1288	PORQUEPUTASYANOSIRVE.exe	96
PID 3308 wrote to memory of 1656	3308	Client.exe	97
PID 3308 wrote to memory of 1656	3308	Client.exe	97
PID 2768 wrote to memory of 416	2768	chrome.exe	101
PID 2768 wrote to memory of 416	2768	chrome.exe	101
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 1508	2768	chrome.exe	102
PID 2768 wrote to memory of 5052	2768	chrome.exe	103
PID 2768 wrote to memory of 5052	2768	chrome.exe	103
PID 2768 wrote to memory of 3256	2768	chrome.exe	104
PID 2768 wrote to memory of 3256	2768	chrome.exe	104
PID 2768 wrote to memory of 3256	2768	chrome.exe	104
PID 2768 wrote to memory of 3256	2768	chrome.exe	104
PID 2768 wrote to memory of 3256	2768	chrome.exe	104
PID 2768 wrote to memory of 3256	2768	chrome.exe	104
PID 2768 wrote to memory of 3256	2768	chrome.exe	104
PID 2768 wrote to memory of 3256	2768	chrome.exe	104
PID 2768 wrote to memory of 3256	2768	chrome.exe	104
PID 2768 wrote to memory of 3256	2768	chrome.exe	104
PID 2768 wrote to memory of 3256	2768	chrome.exe	104
PID 2768 wrote to memory of 3256	2768	chrome.exe	104
PID 2768 wrote to memory of 3256	2768	chrome.exe	104
PID 2768 wrote to memory of 3256	2768	chrome.exe	104
PID 2768 wrote to memory of 3256	2768	chrome.exe	104
PID 2768 wrote to memory of 3256	2768	chrome.exe	104
PID 2768 wrote to memory of 3256	2768	chrome.exe	104
PID 2768 wrote to memory of 3256	2768	chrome.exe	104
PID 2768 wrote to memory of 3256	2768	chrome.exe	104
PID 2768 wrote to memory of 3256	2768	chrome.exe	104
PID 2768 wrote to memory of 3256	2768	chrome.exe	104
PID 2768 wrote to memory of 3256	2768	chrome.exe	104
PID 2768 wrote to memory of 3256	2768	chrome.exe	104
PID 2768 wrote to memory of 3256	2768	chrome.exe	104

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:\Program Files\7-Zip\7zFM.exe
"C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\PORQUEPUTASYANOSIRVE.7z"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
PID:4628

C:\Users\Admin\Desktop\PORQUEPUTASYANOSIRVE.exe
"C:\Users\Admin\Desktop\PORQUEPUTASYANOSIRVE.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1288
- 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:4868
- 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:3308
- - 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:1656

C:\Program Files\Google\Chrome\Application\chrome.exe
"C:\Program Files\Google\Chrome\Application\chrome.exe"
1⤵
- Drops file in Windows directory
- Enumerates system info in registry
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2768
- C:\Program Files\Google\Chrome\Application\chrome.exe
  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" /prefetch:4 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=123.0.6312.123 --initial-client-data=0x228,0x22c,0x230,0x204,0x234,0x7ffbcdc6cc40,0x7ffbcdc6cc4c,0x7ffbcdc6cc58
  2⤵
  PID:416
- C:\Program Files\Google\Chrome\Application\chrome.exe
  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --no-appcompat-clear --gpu-preferences=WAAAAAAAAADgAAAMAAAAAAAAAAAAAAAAAABgAAEAAAA4AAAAAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGAAAAAAAAAAYAAAAAAAAAAgAAAAAAAAACAAAAAAAAAAIAAAAAAAAAA== --field-trial-handle=1976,i,12056535249990517464,11919142836249220085,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=1916 /prefetch:2
  2⤵
  PID:1508
- C:\Program Files\Google\Chrome\Application\chrome.exe
  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --no-appcompat-clear --field-trial-handle=1920,i,12056535249990517464,11919142836249220085,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2096 /prefetch:3
  2⤵
  PID:5052
- C:\Program Files\Google\Chrome\Application\chrome.exe
  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --lang=en-US --service-sandbox-type=service --no-appcompat-clear --field-trial-handle=2276,i,12056535249990517464,11919142836249220085,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2488 /prefetch:8
  2⤵
  PID:3256
- C:\Program Files\Google\Chrome\Application\chrome.exe
  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --no-appcompat-clear --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --field-trial-handle=3120,i,12056535249990517464,11919142836249220085,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3140 /prefetch:1
  2⤵
  PID:4504
- C:\Program Files\Google\Chrome\Application\chrome.exe
  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --no-appcompat-clear --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --field-trial-handle=3164,i,12056535249990517464,11919142836249220085,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3184 /prefetch:1
  2⤵
  PID:4268
- C:\Program Files\Google\Chrome\Application\chrome.exe
  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --no-appcompat-clear --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --field-trial-handle=4604,i,12056535249990517464,11919142836249220085,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4624 /prefetch:1
  2⤵
  PID:2044
- C:\Program Files\Google\Chrome\Application\chrome.exe
  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.ProcessorMetrics --lang=en-US --service-sandbox-type=none --no-appcompat-clear --field-trial-handle=4892,i,12056535249990517464,11919142836249220085,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4944 /prefetch:8
  2⤵
  PID:8
- C:\Program Files\Google\Chrome\Application\chrome.exe
  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --no-appcompat-clear --field-trial-handle=4536,i,12056535249990517464,11919142836249220085,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4528 /prefetch:8
  2⤵
  PID:3500

C:\Program Files\Google\Chrome\Application\123.0.6312.123\elevation_service.exe
"C:\Program Files\Google\Chrome\Application\123.0.6312.123\elevation_service.exe"
1⤵
PID:3968

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s NgcSvc
1⤵
PID:4160

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

Browser Information Discovery

T1217

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\BrowsingTopicsState

Filesize
649B

MD5
d242d9d70d8ec194f7010146ed384236

SHA1
87d15f31f56c3634a2e9c80b2d9f9eb87cb6da9f

SHA256
c9e0f4e914fa912c537304b2b6176ab91f25f240d76e0574e706bf263b5dd9e9

SHA512
c720489ecce149340b3eddf91c67414b391c56e70e23112a733d63495525581e872bd28aaacbbd495f246c4c8c644bc35f1cbd86e714d5ca4a8096e439736423

Download Submit
C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\SCT Auditing Pending Reports

Filesize
2B

MD5
d751713988987e9331980363e24189ce

SHA1
97d170e1550eee4afc0af065b78cda302a97674c

SHA256
4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945

SHA512
b25b294cb4deb69ea00a4c3cf3113904801b6015e5956bd019a8570b1fe1d6040e944ef3cdee16d0a46503ca6e659a25f21cf9ceddc13f352a3c98138c15d6af

Download Submit
C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences

Filesize
9KB

MD5
22db444c31c32eb6e11bbd5128ef08ed

SHA1
50d89701b6cec02f9be0638833a4571bc2bfddd1

SHA256
6d034d540f78df8784c9d891033a85b55fc0ef3f82a42c5d2c6ec84642450126

SHA512
70f722b6b36dd100f3f175c5945f6a7d2df5af259edf953a639fb05dc7c71cf0b75d10060a7373573ec538537738a58431e265e1edd6db43e4c37675dfe9d976

Download Submit
C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Local State

Filesize
236KB

MD5
1709b478df0079cb18cca979b4e002a4

SHA1
4d4883b7d57ad7a3e173a2c79eef6d534d50a56f

SHA256
35c5f416e17cc2a295546710d83029aa7024360ca140c1e076dc9594123b1512

SHA512
de5b7503d8125460da95bbc2b66d74a6db78d4abd98777b4f804544030d1fbf97135eadf9e7a4c2607a8336cdea806828475f61a5d4fb56caa1835e21d4271bb

Download Submit
C:\Users\Admin\Desktop\PORQUEPUTASYANOSIRVE.exe

Filesize
3.1MB

MD5
73565f33ed4d8741291cbb30409f1727

SHA1
4d3a54b28f3ea80f884a25905e27165bdc353109

SHA256
aafe953e627f9e733e101d7211f0c9594dbdf82ec4019b2c9aa361cbc478f0de

SHA512
d897b098ddcdc94ac9177bc9a90b700c8b9a7cfafa74f729beebf74a094f76a7bd69e764711bdfedcdd231465daef16e937676e391ca2c010df03fecc863b583

Download Submit
memory/1288-6-0x00007FFBB57F0000-0x00007FFBB62B2000-memory.dmp

Filesize
10.8MB

Download
memory/1288-9-0x00007FFBB57F0000-0x00007FFBB62B2000-memory.dmp

Filesize
10.8MB

Download
memory/1288-5-0x0000000000280000-0x00000000005A4000-memory.dmp

Filesize
3.1MB

Download
memory/1288-4-0x00007FFBB57F3000-0x00007FFBB57F5000-memory.dmp

Filesize
8KB

Download
memory/3308-14-0x000000001C6E0000-0x000000001C6F2000-memory.dmp

Filesize
72KB

Download
memory/3308-15-0x000000001D260000-0x000000001D29C000-memory.dmp

Filesize
240KB

Download
memory/3308-11-0x000000001C760000-0x000000001C812000-memory.dmp

Filesize
712KB

Download
memory/3308-10-0x000000001C650000-0x000000001C6A0000-memory.dmp

Filesize
320KB

Download