quasar | ce179bf67e184c300fbc5b796ef511c14470a9d3c970298bc8e52beaf7fb1195

General

Target

BITCOIN GEN PRIVATE/Bitcoingens.pdf.exe
Size

3.1MB
MD5

571474cb077262465a4ff6747023b90b
SHA1

be44641489168160ed22ab2b57658a94394441b6
SHA256

2ba889c691dea990e030ef2707a242017df0f094d8d1eadb37343e82f6417e3f
SHA512

e34117b3c5567843019f84d3b8b849404f4463f67188ed26241839c91e91275c4f916a7bde5dcaaeb0fa625e7bbaf682d60a91ec28d01deaafac3e7afb39ee15
SSDEEP

49152:WvbI22SsaNYfdPBldt698dBcjH8xRJ6AbR3LoGdUVXmCTHHB72eh2NT:Wvk22SsaNYfdPBldt6+dBcjH8xRJ6al

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.56.1:4782

Mutex

275f2628-c225-4b94-8c3e-6fb61e5e53af

Attributes

encryption_key
F72BC567B8A2606D9029D70BA29A969A6DEB42D8
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/2456-1-0x00000000002F0000-0x0000000000614000-memory.dmp	family_quasar
behavioral1/files/0x0008000000016f02-4.dat	family_quasar
behavioral1/memory/2324-9-0x0000000000990000-0x0000000000CB4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2324	Client.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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
2356	schtasks.exe
2448	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2456	Bitcoingens.pdf.exe
Token: SeDebugPrivilege	2324	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2324	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2324	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2324	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2456 wrote to memory of 2356	2456	Bitcoingens.pdf.exe	31
PID 2456 wrote to memory of 2356	2456	Bitcoingens.pdf.exe	31
PID 2456 wrote to memory of 2356	2456	Bitcoingens.pdf.exe	31
PID 2456 wrote to memory of 2324	2456	Bitcoingens.pdf.exe	33
PID 2456 wrote to memory of 2324	2456	Bitcoingens.pdf.exe	33
PID 2456 wrote to memory of 2324	2456	Bitcoingens.pdf.exe	33
PID 2324 wrote to memory of 2448	2324	Client.exe	34
PID 2324 wrote to memory of 2448	2324	Client.exe	34
PID 2324 wrote to memory of 2448	2324	Client.exe	34

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\BITCOIN GEN PRIVATE\Bitcoingens.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\BITCOIN GEN PRIVATE\Bitcoingens.pdf.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2456
- 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:2356
- 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 FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2324
- - 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:2448

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

System Information Discovery

1

T1082

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
571474cb077262465a4ff6747023b90b

SHA1
be44641489168160ed22ab2b57658a94394441b6

SHA256
2ba889c691dea990e030ef2707a242017df0f094d8d1eadb37343e82f6417e3f

SHA512
e34117b3c5567843019f84d3b8b849404f4463f67188ed26241839c91e91275c4f916a7bde5dcaaeb0fa625e7bbaf682d60a91ec28d01deaafac3e7afb39ee15

Download Submit
memory/2324-7-0x000007FEF5BE0000-0x000007FEF65CC000-memory.dmp

Filesize
9.9MB

Download
memory/2324-9-0x0000000000990000-0x0000000000CB4000-memory.dmp

Filesize
3.1MB

Download
memory/2324-10-0x000007FEF5BE0000-0x000007FEF65CC000-memory.dmp

Filesize
9.9MB

Download
memory/2324-11-0x000007FEF5BE0000-0x000007FEF65CC000-memory.dmp

Filesize
9.9MB

Download
memory/2456-0-0x000007FEF5BE3000-0x000007FEF5BE4000-memory.dmp

Filesize
4KB

Download
memory/2456-1-0x00000000002F0000-0x0000000000614000-memory.dmp

Filesize
3.1MB

Download
memory/2456-2-0x000007FEF5BE0000-0x000007FEF65CC000-memory.dmp

Filesize
9.9MB

Download
memory/2456-8-0x000007FEF5BE0000-0x000007FEF65CC000-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