quasar | 305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6

General

Target

305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe
Size

763KB
MD5

869037e716218fb7551d84b8ce7d0ae7
SHA1

12cb776519eeb2d5e6a7ab1ddce3a09f143d5f18
SHA256

305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6
SHA512

6840e10d1daeacd169dba4a0049bc3b9087726dd45551b9a9587d57ec45d926356ce1656a39fdf35c1acb4020c564ec1f6a910fd83cde99e3ff75195728c72d2
SSDEEP

12288:SAZdPU5ttcsREhy5IYU8OaNISOvsk0gnT467zpmw7OfimWm/YfdFxfJ:S2UVc+EhyuAOaNIBXnT46fpmiOfimWy4

Score

10^/10

quasar office04 persistence spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0.0

Botnet

Office04

C2

youhackernetpaingodxd.duckdns.org:5557

blablashitspreading.ddns.net:5557

Mutex

xEoEv3HHdyEIYwJRFM

Attributes

encryption_key
w3WfcmWh1iXT9cxeKFEX
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 payload 1 IoCs

resource	yara_rule
behavioral2/memory/4228-147-0x0000000000400000-0x000000000044E000-memory.dmp	family_quasar

Downloads MZ/PE file

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	Updater-File.exe

Executes dropped EXE 1 IoCs

pid	Process
3748	Updater-File.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Driver = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Driver.exe\""	Updater-File.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
24	ip-api.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3748 set thread context of 4228	3748	Updater-File.exe	93

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2276	760	WerFault.exe	81

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1492	powershell.exe
1492	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	760	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe
Token: SeDebugPrivilege	3748	Updater-File.exe
Token: SeDebugPrivilege	1492	powershell.exe
Token: SeDebugPrivilege	4228	RegAsm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4228	RegAsm.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 760 wrote to memory of 3748	760	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	82
PID 760 wrote to memory of 3748	760	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	82
PID 760 wrote to memory of 3748	760	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	82
PID 3748 wrote to memory of 1492	3748	Updater-File.exe	85
PID 3748 wrote to memory of 1492	3748	Updater-File.exe	85
PID 3748 wrote to memory of 1492	3748	Updater-File.exe	85
PID 3748 wrote to memory of 4228	3748	Updater-File.exe	93
PID 3748 wrote to memory of 4228	3748	Updater-File.exe	93
PID 3748 wrote to memory of 4228	3748	Updater-File.exe	93
PID 3748 wrote to memory of 4228	3748	Updater-File.exe	93
PID 3748 wrote to memory of 4228	3748	Updater-File.exe	93
PID 3748 wrote to memory of 4228	3748	Updater-File.exe	93
PID 3748 wrote to memory of 4228	3748	Updater-File.exe	93
PID 3748 wrote to memory of 4228	3748	Updater-File.exe	93

C:\Users\Admin\AppData\Local\Temp\305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe
"C:\Users\Admin\AppData\Local\Temp\305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:760
- C:\Users\Admin\AppData\Roaming\Updater-File.exe
  "C:\Users\Admin\AppData\Roaming\Updater-File.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3748
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1492
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:4228
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 760 -s 2112
  2⤵
  - Program crash
  PID:2276

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 204 -p 760 -ip 760
1⤵
PID:4636

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Updater-File.exe

Filesize
6KB

MD5
be2c9d9f3e9206eb7d809157ea37d0ea

SHA1
79fc984efb6d9e58c21f7c5dee8de2fc44710f62

SHA256
f07ca31e483745ac9fe74da53f939a797f3f8868717eb29f9f0d1286b89f6b79

SHA512
2510583a2690be0c48614fa21d24c2919d6c4f704d897ed4bb5a523d0bbc3616bd2aba7a6b22120068a24aa756a9b6f37feeb2b8eb461b86c2eacde935478d4b

Download Submit
C:\Users\Admin\AppData\Roaming\Updater-File.exe

Filesize
6KB

MD5
be2c9d9f3e9206eb7d809157ea37d0ea

SHA1
79fc984efb6d9e58c21f7c5dee8de2fc44710f62

SHA256
f07ca31e483745ac9fe74da53f939a797f3f8868717eb29f9f0d1286b89f6b79

SHA512
2510583a2690be0c48614fa21d24c2919d6c4f704d897ed4bb5a523d0bbc3616bd2aba7a6b22120068a24aa756a9b6f37feeb2b8eb461b86c2eacde935478d4b

Download Submit
memory/760-132-0x0000000000360000-0x0000000000424000-memory.dmp

Filesize
784KB

Download
memory/1492-143-0x00000000062D0000-0x00000000062EE000-memory.dmp

Filesize
120KB

Download
memory/1492-145-0x00000000067C0000-0x00000000067DA000-memory.dmp

Filesize
104KB

Download
memory/1492-144-0x0000000007960000-0x0000000007FDA000-memory.dmp

Filesize
6.5MB

Download
memory/1492-139-0x0000000002D00000-0x0000000002D36000-memory.dmp

Filesize
216KB

Download
memory/1492-140-0x00000000053E0000-0x0000000005A08000-memory.dmp

Filesize
6.2MB

Download
memory/1492-141-0x0000000005A10000-0x0000000005A76000-memory.dmp

Filesize
408KB

Download
memory/1492-142-0x0000000005C70000-0x0000000005CD6000-memory.dmp

Filesize
408KB

Download
memory/3748-137-0x0000000006470000-0x0000000006492000-memory.dmp

Filesize
136KB

Download
memory/3748-136-0x00000000007E0000-0x00000000007E8000-memory.dmp

Filesize
32KB

Download
memory/4228-147-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4228-148-0x00000000056E0000-0x0000000005C84000-memory.dmp

Filesize
5.6MB

Download
memory/4228-149-0x0000000005260000-0x00000000052F2000-memory.dmp

Filesize
584KB

Download
memory/4228-150-0x0000000006270000-0x0000000006282000-memory.dmp

Filesize
72KB

Download
memory/4228-151-0x00000000066B0000-0x00000000066EC000-memory.dmp

Filesize
240KB

Download
memory/4228-152-0x0000000006A20000-0x0000000006A2A000-memory.dmp

Filesize
40KB

Download

Analysis

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