quasar | 8b507e7ba319bcbf1a13540ec20ad4f31d667a6a1cc99e091fc2f74066123c78

General

Target

poo virus grr/activate virus [logs ur device].exe
Size

3.1MB
MD5

7f604852d7713ce48e754d05cfdb9c2e
SHA1

8caa2ea8644f0014d8949edf576b008de2fcde75
SHA256

db706cddf84bb9d83cda2cc00e6832e26daa6592eef27fc37d39eccdc683e5d4
SHA512

a36e50b1426e990c1130a309bf453657561b646b3160c1e3a3f4d46b02bf24706982f635be627521a909a61b8fa57f0fbcc108cb1c340a37f86725bc38454ef7
SSDEEP

49152:DvyI22SsaNYfdPBldt698dBcjHDXUue8LzCoGhtTHHB72eh2NT:Dvf22SsaNYfdPBldt6+dBcjHDXUu0

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

181.99.66.83:4782

Mutex

7b23506c-ff83-4362-93b4-b99c14429834

Attributes

encryption_key
7A8E2417AD5EAA788488BDF81FE6CACB01258933
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 3 IoCs

resource	yara_rule
behavioral1/memory/1304-1-0x0000000000190000-0x00000000004B4000-memory.dmp	family_quasar
behavioral1/files/0x0008000000015f38-7.dat	family_quasar
behavioral1/memory/2060-10-0x0000000000D30000-0x0000000001054000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2060	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

pid	Process
2440	schtasks.exe
2188	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1304	activate virus [logs ur device].exe
Token: SeDebugPrivilege	2060	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2060	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1304 wrote to memory of 2188	1304	activate virus [logs ur device].exe	30
PID 1304 wrote to memory of 2188	1304	activate virus [logs ur device].exe	30
PID 1304 wrote to memory of 2188	1304	activate virus [logs ur device].exe	30
PID 1304 wrote to memory of 2060	1304	activate virus [logs ur device].exe	32
PID 1304 wrote to memory of 2060	1304	activate virus [logs ur device].exe	32
PID 1304 wrote to memory of 2060	1304	activate virus [logs ur device].exe	32
PID 2060 wrote to memory of 2440	2060	Client.exe	33
PID 2060 wrote to memory of 2440	2060	Client.exe	33
PID 2060 wrote to memory of 2440	2060	Client.exe	33

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\poo virus grr\activate virus [logs ur device].exe
"C:\Users\Admin\AppData\Local\Temp\poo virus grr\activate virus [logs ur device].exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1304
- 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:2188
- 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:2060
- - 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:2440

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

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\Client.exe

Filesize
3.1MB

MD5
7f604852d7713ce48e754d05cfdb9c2e

SHA1
8caa2ea8644f0014d8949edf576b008de2fcde75

SHA256
db706cddf84bb9d83cda2cc00e6832e26daa6592eef27fc37d39eccdc683e5d4

SHA512
a36e50b1426e990c1130a309bf453657561b646b3160c1e3a3f4d46b02bf24706982f635be627521a909a61b8fa57f0fbcc108cb1c340a37f86725bc38454ef7

Download Submit
memory/1304-0-0x000007FEF5F83000-0x000007FEF5F84000-memory.dmp

Filesize
4KB

Download
memory/1304-1-0x0000000000190000-0x00000000004B4000-memory.dmp

Filesize
3.1MB

Download
memory/1304-2-0x000007FEF5F80000-0x000007FEF696C000-memory.dmp

Filesize
9.9MB

Download
memory/1304-9-0x000007FEF5F80000-0x000007FEF696C000-memory.dmp

Filesize
9.9MB

Download
memory/2060-8-0x000007FEF5F80000-0x000007FEF696C000-memory.dmp

Filesize
9.9MB

Download
memory/2060-10-0x0000000000D30000-0x0000000001054000-memory.dmp

Filesize
3.1MB

Download
memory/2060-11-0x000007FEF5F80000-0x000007FEF696C000-memory.dmp

Filesize
9.9MB

Download
memory/2060-12-0x000007FEF5F80000-0x000007FEF696C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads