quasar | c39c6e705d47e5a860be8a42458cc536471d55fc5674526f7517fd972161e3cd

General

Target

c39c6e705d47e5a860be8a42458cc536471d55fc5674526f7517fd972161e3cd.exe
Size

502KB
MD5

b3b85cb2f41722ce117f9413394eb11c
SHA1

7304546899bb48a3b04580327c49d71adee6a47b
SHA256

c39c6e705d47e5a860be8a42458cc536471d55fc5674526f7517fd972161e3cd
SHA512

60e1a3cdc04113cb36c52ce12444af862208b073042f80ad7c095f12b57e935435064cbda714eff2297ec6d27690812f6a11c63929e7a7a90a1c0bd3767538e3
SSDEEP

6144:1TEgdc0YNX7IxUpGREWdnkLmn9MnjM5EtqF+yw4PUcEBOb8F97UycTR3W:1TEgdfYWxUgkLZjl4YywHxpdUycdW

Score

10^/10

quasar gigabyte spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

gigabyte

C2

87.121.52.241:4000

Mutex

565c0b54-8fec-4eb0-a932-429f55a0cc82

Attributes

encryption_key
B000736BEBDF08FC1B6696200651882CF57E43E7
install_name
gigabyte.exe
log_directory
Logs
reconnect_delay
3000
startup_key
gigabyte update
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 2 IoCs

resource	yara_rule
behavioral1/memory/412-0-0x0000000000E70000-0x0000000000EF4000-memory.dmp	family_quasar
behavioral1/files/0x0008000000023240-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4372	gigabyte.exe

Creates scheduled task(s) 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
4576	schtasks.exe
4168	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	412	c39c6e705d47e5a860be8a42458cc536471d55fc5674526f7517fd972161e3cd.exe
Token: SeDebugPrivilege	4372	gigabyte.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4372	gigabyte.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 412 wrote to memory of 4576	412	c39c6e705d47e5a860be8a42458cc536471d55fc5674526f7517fd972161e3cd.exe	90
PID 412 wrote to memory of 4576	412	c39c6e705d47e5a860be8a42458cc536471d55fc5674526f7517fd972161e3cd.exe	90
PID 412 wrote to memory of 4372	412	c39c6e705d47e5a860be8a42458cc536471d55fc5674526f7517fd972161e3cd.exe	92
PID 412 wrote to memory of 4372	412	c39c6e705d47e5a860be8a42458cc536471d55fc5674526f7517fd972161e3cd.exe	92
PID 4372 wrote to memory of 4168	4372	gigabyte.exe	93
PID 4372 wrote to memory of 4168	4372	gigabyte.exe	93

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\c39c6e705d47e5a860be8a42458cc536471d55fc5674526f7517fd972161e3cd.exe
"C:\Users\Admin\AppData\Local\Temp\c39c6e705d47e5a860be8a42458cc536471d55fc5674526f7517fd972161e3cd.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:412
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "gigabyte update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\c39c6e705d47e5a860be8a42458cc536471d55fc5674526f7517fd972161e3cd.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:4576
- C:\Users\Admin\AppData\Roaming\SubDir\gigabyte.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\gigabyte.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4372
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "gigabyte update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\gigabyte.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:4168

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4080 --field-trial-handle=2252,i,16504368816373493055,9578615028378602855,262144 --variations-seed-version /prefetch:8
1⤵
PID:2692

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\gigabyte.exe

Filesize
502KB

MD5
b3b85cb2f41722ce117f9413394eb11c

SHA1
7304546899bb48a3b04580327c49d71adee6a47b

SHA256
c39c6e705d47e5a860be8a42458cc536471d55fc5674526f7517fd972161e3cd

SHA512
60e1a3cdc04113cb36c52ce12444af862208b073042f80ad7c095f12b57e935435064cbda714eff2297ec6d27690812f6a11c63929e7a7a90a1c0bd3767538e3

Download Submit
memory/412-0-0x0000000000E70000-0x0000000000EF4000-memory.dmp

Filesize
528KB

Download
memory/412-1-0x00007FFC4E980000-0x00007FFC4F441000-memory.dmp

Filesize
10.8MB

Download
memory/412-2-0x000000001BDC0000-0x000000001BDD0000-memory.dmp

Filesize
64KB

Download
memory/412-10-0x00007FFC4E980000-0x00007FFC4F441000-memory.dmp

Filesize
10.8MB

Download
memory/4372-7-0x00007FFC4E980000-0x00007FFC4F441000-memory.dmp

Filesize
10.8MB

Download
memory/4372-8-0x000000001B350000-0x000000001B360000-memory.dmp

Filesize
64KB

Download
memory/4372-11-0x000000001BA80000-0x000000001BAD0000-memory.dmp

Filesize
320KB

Download
memory/4372-12-0x000000001BB90000-0x000000001BC42000-memory.dmp

Filesize
712KB

Download
memory/4372-13-0x00007FFC4E980000-0x00007FFC4F441000-memory.dmp

Filesize
10.8MB

Download
memory/4372-14-0x000000001B350000-0x000000001B360000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads