quasar | 397bd422af47cc0511d28b77593f1d768864ff7f76765fc778d9dc3115dc0f98

General

Target

Client-built2.exe
Size

3.1MB
MD5

822eed302ff25105073dfb79ea894215
SHA1

2e5153d66fdc1837b387bf33a2292f6f2ec474d5
SHA256

397bd422af47cc0511d28b77593f1d768864ff7f76765fc778d9dc3115dc0f98
SHA512

fc89bc8d9ed1a7bdb4163222d59ec345a0e039c4fc0475467e91211e9a15bd5aa6436bf36062e1487fd6d3bad06b1aebea8e41360f559348c3c4cafcbfa16e2a
SSDEEP

49152:KvyI22SsaNYfdPBldt698dBcjHk5xNESE5k/i0LoGdLTHHB72eh2NT:Kvf22SsaNYfdPBldt6+dBcjHaxE6

Score

10^/10

quasar dusan persistence spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

dusan

C2

192.168.178.20:4782

Mutex

ded81f24-0e54-4985-a1fb-e180db45c27d

Attributes

encryption_key
A81486939BB2FAD2A02EAF76B26242A2A9C6D91B
install_name
katani.exe
log_directory
Log
reconnect_delay
3000
startup_key
hacked by katani :)
subdirectory
download

Signatures

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

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4920-1-0x0000000000D80000-0x00000000010A4000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\download\katani.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

katani.exe

pid process

2480 katani.exe

pid	process
2480	katani.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

Client-built2.exekatani.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\hacked by katani :) = "\"C:\\Users\\Admin\\AppData\\Roaming\\download\\katani.exe\""	Client-built2.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\hacked by katani :) = "\"C:\\Users\\Admin\\AppData\\Roaming\\download\\katani.exe\""	katani.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

Processes:

schtasks.exeschtasks.exe

pid process

1032 schtasks.exe
3948 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Client-built2.exekatani.exe

description pid process

Token: SeDebugPrivilege 4920 Client-built2.exe
Token: SeDebugPrivilege 2480 katani.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

katani.exe

pid process

2480 katani.exe

pid	process
1032	schtasks.exe
3948	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	4920	Client-built2.exe
Token: SeDebugPrivilege	2480	katani.exe

pid	process
2480	katani.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Client-built2.exekatani.exe

description	pid	process	target process
PID 4920 wrote to memory of 1032	4920	Client-built2.exe	schtasks.exe
PID 4920 wrote to memory of 1032	4920	Client-built2.exe	schtasks.exe
PID 4920 wrote to memory of 2480	4920	Client-built2.exe	katani.exe
PID 4920 wrote to memory of 2480	4920	Client-built2.exe	katani.exe
PID 2480 wrote to memory of 3948	2480	katani.exe	schtasks.exe
PID 2480 wrote to memory of 3948	2480	katani.exe	schtasks.exe

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\Client-built2.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built2.exe"
1⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4920

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "hacked by katani :)" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\download\katani.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:1032

C:\Users\Admin\AppData\Roaming\download\katani.exe
"C:\Users\Admin\AppData\Roaming\download\katani.exe"
2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2480

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "hacked by katani :)" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\download\katani.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:3948

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

Modify Registry

1

T1112

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\download\katani.exe
Filesize
3.1MB

MD5
822eed302ff25105073dfb79ea894215

SHA1
2e5153d66fdc1837b387bf33a2292f6f2ec474d5

SHA256
397bd422af47cc0511d28b77593f1d768864ff7f76765fc778d9dc3115dc0f98

SHA512
fc89bc8d9ed1a7bdb4163222d59ec345a0e039c4fc0475467e91211e9a15bd5aa6436bf36062e1487fd6d3bad06b1aebea8e41360f559348c3c4cafcbfa16e2a

Download Submit
memory/2480-10-0x00007FFAA29F0000-0x00007FFAA34B1000-memory.dmp

Filesize
10.8MB

Download
memory/2480-11-0x00007FFAA29F0000-0x00007FFAA34B1000-memory.dmp

Filesize
10.8MB

Download
memory/2480-12-0x000000001B8B0000-0x000000001B900000-memory.dmp

Filesize
320KB

Download
memory/2480-13-0x000000001B9C0000-0x000000001BA72000-memory.dmp

Filesize
712KB

Download
memory/2480-14-0x00007FFAA29F0000-0x00007FFAA34B1000-memory.dmp

Filesize
10.8MB

Download
memory/4920-0-0x00007FFAA29F3000-0x00007FFAA29F5000-memory.dmp

Filesize
8KB

Download
memory/4920-1-0x0000000000D80000-0x00000000010A4000-memory.dmp

Filesize
3.1MB

Download
memory/4920-2-0x00007FFAA29F0000-0x00007FFAA34B1000-memory.dmp

Filesize
10.8MB

Download
memory/4920-9-0x00007FFAA29F0000-0x00007FFAA34B1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads