quasar | 08fb091d9d284795239c1ffd5f06f339b8b6db726198f5325f4ae55c77199402

Analysis

max time kernel
162s
max time network
168s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
03-05-2022 20:03

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General

Target

Rusher Hack/Data/Installer.exe
Size

683KB
MD5

497e3b749e37fa682a0cf5f5ec869296
SHA1

b6405eb80e48a075489dae999c3291eff5246112
SHA256

288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c
SHA512

86d137a1d8dd452c94c42293b2d2c05d3a10c017c2f1f6f18b2ca54c75925fcd0745d5e59e9deb9d533aeaf824a1e727513a2bf852d96c68e2c1f252ce84fd93

Score

10^/10

quasar venomrat $77systemtelemtry evasion rat rootkit spyware stealer suricata trojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

$77systemtelemtry

192.168.0.44:80

67.61.188.107:80

Mutex

VNM_MUTEX_OplgS6EDrflEgnBXyU

Attributes

encryption_key
tfNbPwosWP6IOHXzQKKG
install_name
windowsrc.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Registry Handler
subdirectory
bin

Signatures

Contains code to disable Windows Defender 3 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

Processes:

resource	yara_rule
behavioral2/memory/4648-130-0x00000000005D0000-0x0000000000680000-memory.dmp	disable_win_def
behavioral2/files/0x000500000001e76d-138.dat	disable_win_def
behavioral2/files/0x000500000001e76d-139.dat	disable_win_def

Modifies Windows Defender Real-time Protection settings 3 TTPs
evasion trojan

Modify Registry
T1112

Modify Existing Service
T1031

Disabling Security Tools
T1089

Quasar Payload 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4648-130-0x00000000005D0000-0x0000000000680000-memory.dmp	family_quasar
behavioral2/files/0x000500000001e76d-138.dat	family_quasar
behavioral2/files/0x000500000001e76d-139.dat	family_quasar

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
VenomRAT
VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.
rat rootkit stealer venomrat
suricata: ET MALWARE Common RAT Connectivity Check Observed
suricata: ET MALWARE Common RAT Connectivity Check Observed
suricata

Executes dropped EXE 1 IoCs

Processes:

windowsrc.exe

pid	Process
1880	windowsrc.exe

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

Installer.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	Installer.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

Installer.exe

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features	Installer.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	Installer.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.

Processes:

flow	ioc
68	ip-api.com

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

System Information Discovery
T1082

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

T1053

Processes:

schtasks.exeschtasks.exe

pid	Process
3684	schtasks.exe
2120	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

Processes:

PING.EXE

pid	Process
1472	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

powershell.exeInstaller.exeInstaller.exe

pid	Process
1448	powershell.exe
1448	powershell.exe
4648	Installer.exe
4648	Installer.exe
4648	Installer.exe
4648	Installer.exe
4648	Installer.exe
4648	Installer.exe
4648	Installer.exe
4300	Installer.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

Installer.exewindowsrc.exepowershell.exeInstaller.exe

description	pid	Process
Token: SeDebugPrivilege	4648	Installer.exe
Token: SeDebugPrivilege	1880	windowsrc.exe
Token: SeDebugPrivilege	1880	windowsrc.exe
Token: SeDebugPrivilege	1448	powershell.exe
Token: SeDebugPrivilege	4300	Installer.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

windowsrc.exe

pid	Process
1880	windowsrc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

Installer.exewindowsrc.execmd.execmd.exe

description	pid	Process	procid_target
PID 4648 wrote to memory of 3684	4648	Installer.exe	94
PID 4648 wrote to memory of 3684	4648	Installer.exe	94
PID 4648 wrote to memory of 3684	4648	Installer.exe	94
PID 4648 wrote to memory of 1880	4648	Installer.exe	97
PID 4648 wrote to memory of 1880	4648	Installer.exe	97
PID 4648 wrote to memory of 1880	4648	Installer.exe	97
PID 4648 wrote to memory of 1448	4648	Installer.exe	98
PID 4648 wrote to memory of 1448	4648	Installer.exe	98
PID 4648 wrote to memory of 1448	4648	Installer.exe	98
PID 1880 wrote to memory of 2120	1880	windowsrc.exe	100
PID 1880 wrote to memory of 2120	1880	windowsrc.exe	100
PID 1880 wrote to memory of 2120	1880	windowsrc.exe	100
PID 4648 wrote to memory of 3440	4648	Installer.exe	106
PID 4648 wrote to memory of 3440	4648	Installer.exe	106
PID 4648 wrote to memory of 3440	4648	Installer.exe	106
PID 3440 wrote to memory of 1872	3440	cmd.exe	108
PID 3440 wrote to memory of 1872	3440	cmd.exe	108
PID 3440 wrote to memory of 1872	3440	cmd.exe	108
PID 4648 wrote to memory of 2292	4648	Installer.exe	109
PID 4648 wrote to memory of 2292	4648	Installer.exe	109
PID 4648 wrote to memory of 2292	4648	Installer.exe	109
PID 2292 wrote to memory of 4900	2292	cmd.exe	111
PID 2292 wrote to memory of 4900	2292	cmd.exe	111
PID 2292 wrote to memory of 4900	2292	cmd.exe	111
PID 2292 wrote to memory of 1472	2292	cmd.exe	112
PID 2292 wrote to memory of 1472	2292	cmd.exe	112
PID 2292 wrote to memory of 1472	2292	cmd.exe	112
PID 2292 wrote to memory of 4300	2292	cmd.exe	113
PID 2292 wrote to memory of 4300	2292	cmd.exe	113
PID 2292 wrote to memory of 4300	2292	cmd.exe	113

C:\Users\Admin\AppData\Local\Temp\Rusher Hack\Data\Installer.exe
"C:\Users\Admin\AppData\Local\Temp\Rusher Hack\Data\Installer.exe"
1⤵
- Checks computer location settings
- Windows security modification
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4648
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Windows Registry Handler" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Rusher Hack\Data\Installer.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:3684
- C:\Users\Admin\AppData\Roaming\bin\windowsrc.exe
  "C:\Users\Admin\AppData\Roaming\bin\windowsrc.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1880
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Windows Registry Handler" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\bin\windowsrc.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:2120
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1448
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k start /b del /q/f/s %TEMP%\* & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3440
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
    3⤵
    PID:1872
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\w1Knq9cBXG50.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2292
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:4900
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 10 localhost
    3⤵
    - Runs ping.exe
    PID:1472
- - C:\Users\Admin\AppData\Local\Temp\Rusher Hack\Data\Installer.exe
    "C:\Users\Admin\AppData\Local\Temp\Rusher Hack\Data\Installer.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4300

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Modify Existing Service

T1031

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Disabling Security Tools

T1089

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Installer.exe.log

Filesize
1KB

MD5
10eab9c2684febb5327b6976f2047587

SHA1
a12ed54146a7f5c4c580416aecb899549712449e

SHA256
f49dbd55029bfbc15134f7c6a4f967d6c39142c63f2e8f1f8c78fab108a2c928

SHA512
7e5fd90fffae723bd0c662a90e0730b507805f072771ee673d1d8c262dbf60c8a03ba5fe088f699a97c2e886380de158b2ccd59ee62e3d012dd6dd14ea9d0e50

Download Submit
C:\Users\Admin\AppData\Local\Temp\w1Knq9cBXG50.bat

Filesize
223B

MD5
c906c929b5567701c5030c8b89dab302

SHA1
84af79ad16f131b3786245b024509fda17b91723

SHA256
e80faed97537550f30317b6b8f81c5b4c400bb8b570cba58123c95419eced4ca

SHA512
4f34cde99e66c7d6e684f510112eb596aefc2cc59fc14a4be1781c44f7b1f13dd902f88352e13a62e81d59adb38679bb470bf282508a47a90f45376d41d09706

Download Submit
C:\Users\Admin\AppData\Roaming\bin\windowsrc.exe

Filesize
683KB

MD5
497e3b749e37fa682a0cf5f5ec869296

SHA1
b6405eb80e48a075489dae999c3291eff5246112

SHA256
288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c

SHA512
86d137a1d8dd452c94c42293b2d2c05d3a10c017c2f1f6f18b2ca54c75925fcd0745d5e59e9deb9d533aeaf824a1e727513a2bf852d96c68e2c1f252ce84fd93

Download Submit
C:\Users\Admin\AppData\Roaming\bin\windowsrc.exe

Filesize
683KB

MD5
497e3b749e37fa682a0cf5f5ec869296

SHA1
b6405eb80e48a075489dae999c3291eff5246112

SHA256
288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c

SHA512
86d137a1d8dd452c94c42293b2d2c05d3a10c017c2f1f6f18b2ca54c75925fcd0745d5e59e9deb9d533aeaf824a1e727513a2bf852d96c68e2c1f252ce84fd93

Download Submit
memory/1448-148-0x0000000006210000-0x0000000006242000-memory.dmp

Filesize
200KB

Download
memory/1448-156-0x0000000007320000-0x000000000733A000-memory.dmp

Filesize
104KB

Download
memory/1448-157-0x0000000007300000-0x0000000007308000-memory.dmp

Filesize
32KB

Download
memory/1448-155-0x00000000072B0000-0x00000000072BE000-memory.dmp

Filesize
56KB

Download
memory/1448-154-0x00000000071D0000-0x0000000007266000-memory.dmp

Filesize
600KB

Download
memory/1448-153-0x0000000006FE0000-0x0000000006FEA000-memory.dmp

Filesize
40KB

Download
memory/1448-140-0x0000000000000000-mapping.dmp

Download
memory/1448-141-0x0000000002330000-0x0000000002366000-memory.dmp

Filesize
216KB

Download
memory/1448-152-0x0000000006310000-0x000000000632A000-memory.dmp

Filesize
104KB

Download
memory/1448-143-0x0000000004E70000-0x0000000005498000-memory.dmp

Filesize
6.2MB

Download
memory/1448-151-0x0000000007610000-0x0000000007C8A000-memory.dmp

Filesize
6.5MB

Download
memory/1448-145-0x0000000004E30000-0x0000000004E52000-memory.dmp

Filesize
136KB

Download
memory/1448-146-0x0000000005510000-0x0000000005576000-memory.dmp

Filesize
408KB

Download
memory/1448-147-0x0000000005CD0000-0x0000000005CEE000-memory.dmp

Filesize
120KB

Download
memory/1448-150-0x00000000061F0000-0x000000000620E000-memory.dmp

Filesize
120KB

Download
memory/1448-149-0x0000000070360000-0x00000000703AC000-memory.dmp

Filesize
304KB

Download
memory/1472-163-0x0000000000000000-mapping.dmp

Download
memory/1872-159-0x0000000000000000-mapping.dmp

Download
memory/1880-144-0x0000000007030000-0x000000000703A000-memory.dmp

Filesize
40KB

Download
memory/1880-137-0x0000000000000000-mapping.dmp

Download
memory/2120-142-0x0000000000000000-mapping.dmp

Download
memory/2292-160-0x0000000000000000-mapping.dmp

Download
memory/3440-158-0x0000000000000000-mapping.dmp

Download
memory/3684-136-0x0000000000000000-mapping.dmp

Download
memory/4300-164-0x0000000000000000-mapping.dmp

Download
memory/4648-130-0x00000000005D0000-0x0000000000680000-memory.dmp

Filesize
704KB

Download
memory/4648-135-0x0000000006170000-0x00000000061AC000-memory.dmp

Filesize
240KB

Download
memory/4648-134-0x00000000056B0000-0x00000000056C2000-memory.dmp

Filesize
72KB

Download
memory/4648-132-0x0000000005080000-0x0000000005112000-memory.dmp

Filesize
584KB

Download
memory/4648-133-0x00000000054C0000-0x0000000005526000-memory.dmp

Filesize
408KB

Download
memory/4648-131-0x0000000005700000-0x0000000005CA4000-memory.dmp

Filesize
5.6MB

Download
memory/4900-162-0x0000000000000000-mapping.dmp

Download