quasar | 8a31693ddf8924f144ba19a8802766188bd13f1ed7eea7c226eb0e01a9e47685

Analysis

max time kernel
154s
max time network
156s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
26-11-2024 02:37

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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/0x0028000000045045-2.dat	family_quasar
behavioral1/memory/1036-5-0x00000000007A0000-0x0000000000AC4000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

pid	Process
1036	PORQUEPUTASYANOSIRVE.exe
2264	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemProductName	chrome.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer	chrome.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	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 = "133770623956754599"	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
2096	schtasks.exe
2480	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
960	chrome.exe
960	chrome.exe

Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 3 IoCs

pid	Process
960	chrome.exe
960	chrome.exe
960	chrome.exe

Suspicious use of AdjustPrivilegeToken 21 IoCs

description	pid	Process
Token: SeRestorePrivilege	224	7zFM.exe
Token: 35	224	7zFM.exe
Token: SeSecurityPrivilege	224	7zFM.exe
Token: SeDebugPrivilege	1036	PORQUEPUTASYANOSIRVE.exe
Token: SeDebugPrivilege	2264	Client.exe
Token: SeShutdownPrivilege	960	chrome.exe
Token: SeCreatePagefilePrivilege	960	chrome.exe
Token: SeShutdownPrivilege	960	chrome.exe
Token: SeCreatePagefilePrivilege	960	chrome.exe
Token: SeShutdownPrivilege	960	chrome.exe
Token: SeCreatePagefilePrivilege	960	chrome.exe
Token: SeShutdownPrivilege	960	chrome.exe
Token: SeCreatePagefilePrivilege	960	chrome.exe
Token: SeShutdownPrivilege	960	chrome.exe
Token: SeCreatePagefilePrivilege	960	chrome.exe
Token: SeShutdownPrivilege	960	chrome.exe
Token: SeCreatePagefilePrivilege	960	chrome.exe
Token: SeShutdownPrivilege	960	chrome.exe
Token: SeCreatePagefilePrivilege	960	chrome.exe
Token: SeShutdownPrivilege	960	chrome.exe
Token: SeCreatePagefilePrivilege	960	chrome.exe

Suspicious use of FindShellTrayWindow 28 IoCs

pid	Process
224	7zFM.exe
224	7zFM.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe

Suspicious use of SendNotifyMessage 24 IoCs

pid	Process
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe
960	chrome.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2264	Client.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1036 wrote to memory of 2096	1036	PORQUEPUTASYANOSIRVE.exe	91
PID 1036 wrote to memory of 2096	1036	PORQUEPUTASYANOSIRVE.exe	91
PID 1036 wrote to memory of 2264	1036	PORQUEPUTASYANOSIRVE.exe	93
PID 1036 wrote to memory of 2264	1036	PORQUEPUTASYANOSIRVE.exe	93
PID 2264 wrote to memory of 2480	2264	Client.exe	94
PID 2264 wrote to memory of 2480	2264	Client.exe	94
PID 960 wrote to memory of 4576	960	chrome.exe	98
PID 960 wrote to memory of 4576	960	chrome.exe	98
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4772	960	chrome.exe	99
PID 960 wrote to memory of 4460	960	chrome.exe	100
PID 960 wrote to memory of 4460	960	chrome.exe	100
PID 960 wrote to memory of 1296	960	chrome.exe	101
PID 960 wrote to memory of 1296	960	chrome.exe	101
PID 960 wrote to memory of 1296	960	chrome.exe	101
PID 960 wrote to memory of 1296	960	chrome.exe	101
PID 960 wrote to memory of 1296	960	chrome.exe	101
PID 960 wrote to memory of 1296	960	chrome.exe	101
PID 960 wrote to memory of 1296	960	chrome.exe	101
PID 960 wrote to memory of 1296	960	chrome.exe	101
PID 960 wrote to memory of 1296	960	chrome.exe	101
PID 960 wrote to memory of 1296	960	chrome.exe	101
PID 960 wrote to memory of 1296	960	chrome.exe	101
PID 960 wrote to memory of 1296	960	chrome.exe	101
PID 960 wrote to memory of 1296	960	chrome.exe	101
PID 960 wrote to memory of 1296	960	chrome.exe	101
PID 960 wrote to memory of 1296	960	chrome.exe	101
PID 960 wrote to memory of 1296	960	chrome.exe	101
PID 960 wrote to memory of 1296	960	chrome.exe	101
PID 960 wrote to memory of 1296	960	chrome.exe	101
PID 960 wrote to memory of 1296	960	chrome.exe	101
PID 960 wrote to memory of 1296	960	chrome.exe	101
PID 960 wrote to memory of 1296	960	chrome.exe	101
PID 960 wrote to memory of 1296	960	chrome.exe	101
PID 960 wrote to memory of 1296	960	chrome.exe	101
PID 960 wrote to memory of 1296	960	chrome.exe	101

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:224

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:1036
- 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:2096
- 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:2264
- - 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:2480

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:960
- 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=0x220,0x224,0x228,0x1f0,0x22c,0x7fffd7a5cc40,0x7fffd7a5cc4c,0x7fffd7a5cc58
  2⤵
  PID:4576
- 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=2012,i,1867624565958439864,6117235928764902475,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2000 /prefetch:2
  2⤵
  PID:4772
- 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=1856,i,1867624565958439864,6117235928764902475,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2068 /prefetch:3
  2⤵
  PID:4460
- 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=2108,i,1867624565958439864,6117235928764902475,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2340 /prefetch:8
  2⤵
  PID:1296
- 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=3148,i,1867624565958439864,6117235928764902475,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3168 /prefetch:1
  2⤵
  PID:2760
- 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=3176,i,1867624565958439864,6117235928764902475,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3200 /prefetch:1
  2⤵
  PID:836
- 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=3704,i,1867624565958439864,6117235928764902475,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4544 /prefetch:1
  2⤵
  PID:2732
- 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=4856,i,1867624565958439864,6117235928764902475,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4868 /prefetch:8
  2⤵
  PID:816
- 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=4992,i,1867624565958439864,6117235928764902475,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4944 /prefetch:8
  2⤵
  PID:2936

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:4496

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s NgcSvc
1⤵
PID:2300

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

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Downloads

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

Filesize
649B

MD5
bc96504d6f09367517a15c4094910d44

SHA1
6e84514a1ba0cf81ed89e7a30c6e476a3515c2a1

SHA256
8f0edac5d602e2fa946972b9962bf83f87575bee48221102b64802c12071af1e

SHA512
934d39ecbeb27293d3207b9b82af1b9f80df9c845c2a81906ca87ff22b45fa3f26641b6fde468e71936871a5fe8a3b4111cc4a4f4047c5717a950d542aa9dd36

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\Desktop\PORQUEPUTASYANOSIRVE.exe

Filesize
3.1MB

MD5
73565f33ed4d8741291cbb30409f1727

SHA1
4d3a54b28f3ea80f884a25905e27165bdc353109

SHA256
aafe953e627f9e733e101d7211f0c9594dbdf82ec4019b2c9aa361cbc478f0de

SHA512
d897b098ddcdc94ac9177bc9a90b700c8b9a7cfafa74f729beebf74a094f76a7bd69e764711bdfedcdd231465daef16e937676e391ca2c010df03fecc863b583

Download Submit
memory/1036-4-0x00007FFFBF243000-0x00007FFFBF245000-memory.dmp

Filesize
8KB

Download
memory/1036-5-0x00000000007A0000-0x0000000000AC4000-memory.dmp

Filesize
3.1MB

Download
memory/1036-6-0x00007FFFBF240000-0x00007FFFBFD02000-memory.dmp

Filesize
10.8MB

Download
memory/1036-9-0x00007FFFBF240000-0x00007FFFBFD02000-memory.dmp

Filesize
10.8MB

Download
memory/2264-10-0x000000001B7E0000-0x000000001B830000-memory.dmp

Filesize
320KB

Download
memory/2264-11-0x000000001C980000-0x000000001CA32000-memory.dmp

Filesize
712KB

Download
memory/2264-14-0x000000001B860000-0x000000001B872000-memory.dmp

Filesize
72KB

Download
memory/2264-15-0x000000001C900000-0x000000001C93C000-memory.dmp

Filesize
240KB

Download