quasar | 6c1025919511a0974d4e7212b1007d499836c424ec536e5625637ca0c091a33c

General

Target

6c1025919511a0974d4e7212b1007d499836c424ec536e5625637ca0c091a33c.exe
Size

3.1MB
MD5

dc8e312af83c70840406faa6fc7a62c2
SHA1

ddf2abafadeef2ecdbca716ad491b3a2023c49fc
SHA256

6c1025919511a0974d4e7212b1007d499836c424ec536e5625637ca0c091a33c
SHA512

d5dde6eb392ddc8838f9aa6d583526548d9580de5e175ea1e40986de7fa213dfb0c5becbda87c38008706c954410704021d22149e614131c427c94b8daf4ce78
SSDEEP

49152:rvyI22SsaNYfdPBldt698dBcjH2QRJ6WbR3LoGdgcTHHB72eh2NT8:rvf22SsaNYfdPBldt6+dBcjH2QRJ6QQO

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

50.114.115.135:4782

Mutex

1e0c60c5-a4af-4c26-a7f1-5ee890a8321a

Attributes

encryption_key
26CBB40F2457EA2E776A5BB10B783B74E5FD47D3
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/2780-1-0x0000000000E20000-0x0000000001144000-memory.dmp	family_quasar
behavioral1/files/0x0008000000015ed2-6.dat	family_quasar
behavioral1/memory/2764-10-0x0000000001310000-0x0000000001634000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2764	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
2728	schtasks.exe
2708	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2780	6c1025919511a0974d4e7212b1007d499836c424ec536e5625637ca0c091a33c.exe
Token: SeDebugPrivilege	2764	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2764	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2780 wrote to memory of 2728	2780	6c1025919511a0974d4e7212b1007d499836c424ec536e5625637ca0c091a33c.exe	31
PID 2780 wrote to memory of 2728	2780	6c1025919511a0974d4e7212b1007d499836c424ec536e5625637ca0c091a33c.exe	31
PID 2780 wrote to memory of 2728	2780	6c1025919511a0974d4e7212b1007d499836c424ec536e5625637ca0c091a33c.exe	31
PID 2780 wrote to memory of 2764	2780	6c1025919511a0974d4e7212b1007d499836c424ec536e5625637ca0c091a33c.exe	33
PID 2780 wrote to memory of 2764	2780	6c1025919511a0974d4e7212b1007d499836c424ec536e5625637ca0c091a33c.exe	33
PID 2780 wrote to memory of 2764	2780	6c1025919511a0974d4e7212b1007d499836c424ec536e5625637ca0c091a33c.exe	33
PID 2764 wrote to memory of 2708	2764	Client.exe	34
PID 2764 wrote to memory of 2708	2764	Client.exe	34
PID 2764 wrote to memory of 2708	2764	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\6c1025919511a0974d4e7212b1007d499836c424ec536e5625637ca0c091a33c.exe
"C:\Users\Admin\AppData\Local\Temp\6c1025919511a0974d4e7212b1007d499836c424ec536e5625637ca0c091a33c.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2780
- 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:2728
- 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:2764
- - 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:2708

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
dc8e312af83c70840406faa6fc7a62c2

SHA1
ddf2abafadeef2ecdbca716ad491b3a2023c49fc

SHA256
6c1025919511a0974d4e7212b1007d499836c424ec536e5625637ca0c091a33c

SHA512
d5dde6eb392ddc8838f9aa6d583526548d9580de5e175ea1e40986de7fa213dfb0c5becbda87c38008706c954410704021d22149e614131c427c94b8daf4ce78

Download Submit
memory/2764-9-0x000007FEF5BB0000-0x000007FEF659C000-memory.dmp

Filesize
9.9MB

Download
memory/2764-10-0x0000000001310000-0x0000000001634000-memory.dmp

Filesize
3.1MB

Download
memory/2764-11-0x000007FEF5BB0000-0x000007FEF659C000-memory.dmp

Filesize
9.9MB

Download
memory/2764-12-0x000007FEF5BB0000-0x000007FEF659C000-memory.dmp

Filesize
9.9MB

Download
memory/2764-13-0x000007FEF5BB0000-0x000007FEF659C000-memory.dmp

Filesize
9.9MB

Download
memory/2780-0-0x000007FEF5BB3000-0x000007FEF5BB4000-memory.dmp

Filesize
4KB

Download
memory/2780-1-0x0000000000E20000-0x0000000001144000-memory.dmp

Filesize
3.1MB

Download
memory/2780-2-0x000007FEF5BB0000-0x000007FEF659C000-memory.dmp

Filesize
9.9MB

Download
memory/2780-8-0x000007FEF5BB0000-0x000007FEF659C000-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