quasar | a4b343420149aabd8ef8af687bcb7b252af476c4c8fdad177c3cf5d65ccf912e

Analysis

max time kernel
78s
max time network
89s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
06-11-2024 19:17

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General

Target

Lo último.exe
Size

3.1MB
MD5

afb2e5dad453db7cf42339f806f37532
SHA1

90fa9e8b4ed9d086d67b9f86dc57151db1637ca9
SHA256

a4b343420149aabd8ef8af687bcb7b252af476c4c8fdad177c3cf5d65ccf912e
SHA512

72c3474f11a90bd904957030d019611c460dfa66524e0113b40b18a4ae0f3d81d56ae125fa2f247b266e71a11fcaad5884987036563e9464dc2e973877f79f3f
SSDEEP

49152:Hv+lL26AaNeWgPhlmVqvMQ7XSKwkamEoXdl3THHB72eh2NT:HvuL26AaNeWgPhlmVqkQ7XSK9af8

Score

10^/10

quasar office04 discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

Ingrid78-20703.portmap.host:20703

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/memory/3896-1-0x0000000000290000-0x00000000005B4000-memory.dmp	family_quasar
behavioral1/files/0x0028000000045055-3.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3176	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 = "133753943281787894"	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
1952	schtasks.exe
3216	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1464	chrome.exe
1464	chrome.exe

Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 3 IoCs

pid	Process
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe

Suspicious use of AdjustPrivilegeToken 16 IoCs

description	pid	Process
Token: SeDebugPrivilege	3896	Lo último.exe
Token: SeDebugPrivilege	3176	Client.exe
Token: SeShutdownPrivilege	1464	chrome.exe
Token: SeCreatePagefilePrivilege	1464	chrome.exe
Token: SeShutdownPrivilege	1464	chrome.exe
Token: SeCreatePagefilePrivilege	1464	chrome.exe
Token: SeShutdownPrivilege	1464	chrome.exe
Token: SeCreatePagefilePrivilege	1464	chrome.exe
Token: SeShutdownPrivilege	1464	chrome.exe
Token: SeCreatePagefilePrivilege	1464	chrome.exe
Token: SeShutdownPrivilege	1464	chrome.exe
Token: SeCreatePagefilePrivilege	1464	chrome.exe
Token: SeShutdownPrivilege	1464	chrome.exe
Token: SeCreatePagefilePrivilege	1464	chrome.exe
Token: SeShutdownPrivilege	1464	chrome.exe
Token: SeCreatePagefilePrivilege	1464	chrome.exe

Suspicious use of FindShellTrayWindow 26 IoCs

pid	Process
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe

Suspicious use of SendNotifyMessage 24 IoCs

pid	Process
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe
1464	chrome.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3176	Client.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 3896 wrote to memory of 1952	3896	Lo último.exe	82
PID 3896 wrote to memory of 1952	3896	Lo último.exe	82
PID 3896 wrote to memory of 3176	3896	Lo último.exe	84
PID 3896 wrote to memory of 3176	3896	Lo último.exe	84
PID 3176 wrote to memory of 3216	3176	Client.exe	85
PID 3176 wrote to memory of 3216	3176	Client.exe	85
PID 1464 wrote to memory of 1480	1464	chrome.exe	98
PID 1464 wrote to memory of 1480	1464	chrome.exe	98
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 1472	1464	chrome.exe	99
PID 1464 wrote to memory of 4424	1464	chrome.exe	100
PID 1464 wrote to memory of 4424	1464	chrome.exe	100
PID 1464 wrote to memory of 2436	1464	chrome.exe	101
PID 1464 wrote to memory of 2436	1464	chrome.exe	101
PID 1464 wrote to memory of 2436	1464	chrome.exe	101
PID 1464 wrote to memory of 2436	1464	chrome.exe	101
PID 1464 wrote to memory of 2436	1464	chrome.exe	101
PID 1464 wrote to memory of 2436	1464	chrome.exe	101
PID 1464 wrote to memory of 2436	1464	chrome.exe	101
PID 1464 wrote to memory of 2436	1464	chrome.exe	101
PID 1464 wrote to memory of 2436	1464	chrome.exe	101
PID 1464 wrote to memory of 2436	1464	chrome.exe	101
PID 1464 wrote to memory of 2436	1464	chrome.exe	101
PID 1464 wrote to memory of 2436	1464	chrome.exe	101
PID 1464 wrote to memory of 2436	1464	chrome.exe	101
PID 1464 wrote to memory of 2436	1464	chrome.exe	101
PID 1464 wrote to memory of 2436	1464	chrome.exe	101
PID 1464 wrote to memory of 2436	1464	chrome.exe	101
PID 1464 wrote to memory of 2436	1464	chrome.exe	101
PID 1464 wrote to memory of 2436	1464	chrome.exe	101
PID 1464 wrote to memory of 2436	1464	chrome.exe	101
PID 1464 wrote to memory of 2436	1464	chrome.exe	101
PID 1464 wrote to memory of 2436	1464	chrome.exe	101
PID 1464 wrote to memory of 2436	1464	chrome.exe	101
PID 1464 wrote to memory of 2436	1464	chrome.exe	101
PID 1464 wrote to memory of 2436	1464	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:\Users\Admin\AppData\Local\Temp\Lo último.exe
"C:\Users\Admin\AppData\Local\Temp\Lo último.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3896
- 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:1952
- 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:3176
- - 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:3216

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:1464
- 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=0x220,0x224,0x228,0x1fc,0x22c,0x7ffe5174cc40,0x7ffe5174cc4c,0x7ffe5174cc58
  2⤵
  PID:1480
- 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=2020,i,5223497252841297488,5109782654312647482,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2016 /prefetch:2
  2⤵
  PID:1472
- 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=1956,i,5223497252841297488,5109782654312647482,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2056 /prefetch:3
  2⤵
  PID:4424
- 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=2272,i,5223497252841297488,5109782654312647482,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2292 /prefetch:8
  2⤵
  PID:2436
- 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=3152,i,5223497252841297488,5109782654312647482,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3172 /prefetch:1
  2⤵
  PID:1280
- 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=3192,i,5223497252841297488,5109782654312647482,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3220 /prefetch:1
  2⤵
  PID:1168
- 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=4592,i,5223497252841297488,5109782654312647482,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4560 /prefetch:1
  2⤵
  PID:4864
- 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=3724,i,5223497252841297488,5109782654312647482,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3736 /prefetch:8
  2⤵
  PID:4756
- 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=3672,i,5223497252841297488,5109782654312647482,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4900 /prefetch:8
  2⤵
  PID:4944
- 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=5044,i,5223497252841297488,5109782654312647482,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=5068 /prefetch:8
  2⤵
  PID:4472
- 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=5004,i,5223497252841297488,5109782654312647482,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4744 /prefetch:8
  2⤵
  PID:1236

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:2664

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s NgcSvc
1⤵
PID:2260

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
536a35705dabe2bc9e96ac16ca3e7add

SHA1
8946cc6ba376a9a9c666069eec4edb61e123e65e

SHA256
96268854c705933fef28d587e6ff4db48635574002901dab1c984586f17e6bc1

SHA512
0ece7311768236e625a2498ac735cedae414ed3f1b0bdd2cc7d6df43f4f2ca09140308493158ea8c76dff962e1267fa69ee734ade2281b0b1d23d92225af692f

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\Roaming\SubDir\Client.exe

Filesize
3.1MB

MD5
afb2e5dad453db7cf42339f806f37532

SHA1
90fa9e8b4ed9d086d67b9f86dc57151db1637ca9

SHA256
a4b343420149aabd8ef8af687bcb7b252af476c4c8fdad177c3cf5d65ccf912e

SHA512
72c3474f11a90bd904957030d019611c460dfa66524e0113b40b18a4ae0f3d81d56ae125fa2f247b266e71a11fcaad5884987036563e9464dc2e973877f79f3f

Download Submit
memory/3176-7-0x00007FFE5A500000-0x00007FFE5AFC2000-memory.dmp

Filesize
10.8MB

Download
memory/3176-8-0x000000001B410000-0x000000001B460000-memory.dmp

Filesize
320KB

Download
memory/3176-9-0x000000001C660000-0x000000001C712000-memory.dmp

Filesize
712KB

Download
memory/3176-10-0x00007FFE5A500000-0x00007FFE5AFC2000-memory.dmp

Filesize
10.8MB

Download
memory/3176-13-0x000000001C600000-0x000000001C612000-memory.dmp

Filesize
72KB

Download
memory/3176-14-0x000000001D160000-0x000000001D19C000-memory.dmp

Filesize
240KB

Download
memory/3176-5-0x00007FFE5A500000-0x00007FFE5AFC2000-memory.dmp

Filesize
10.8MB

Download
memory/3896-6-0x00007FFE5A500000-0x00007FFE5AFC2000-memory.dmp

Filesize
10.8MB

Download
memory/3896-0-0x00007FFE5A503000-0x00007FFE5A505000-memory.dmp

Filesize
8KB

Download
memory/3896-2-0x00007FFE5A500000-0x00007FFE5AFC2000-memory.dmp

Filesize
10.8MB

Download
memory/3896-1-0x0000000000290000-0x00000000005B4000-memory.dmp

Filesize
3.1MB

Download