quasar | 08fb091d9d284795239c1ffd5f06f339b8b6db726198f5325f4ae55c77199402

Analysis

max time kernel
146s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
03-05-2022 20:03

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General

Target

Rusher Hack/RusherHackInstaller.exe
Size

683KB
MD5

a8b9706ed1ca326d4673b88fed84db23
SHA1

72fb18cdcd67d83fe1484b8ff93ba477e8082f7d
SHA256

bfc55cb35294fba322924cd2fe7ab9e79875b2cca66419ee5ef6d675b895349c
SHA512

89c5706bba41e6b25ad1f4431eba26df9145c2292f0c42c64c688851c1882004814bf4444f8013efc1504b4bb2bbb4d11896fec7c2e42088604eedadd28ebb9b

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
6opnJj4VnPTLLOS9SdTg
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
behavioral4/memory/4324-130-0x0000000000550000-0x0000000000600000-memory.dmp	disable_win_def
behavioral4/files/0x0009000000022ed8-138.dat	disable_win_def
behavioral4/files/0x0009000000022ed8-140.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
behavioral4/memory/4324-130-0x0000000000550000-0x0000000000600000-memory.dmp	family_quasar
behavioral4/files/0x0009000000022ed8-138.dat	family_quasar
behavioral4/files/0x0009000000022ed8-140.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
2436	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:

RusherHackInstaller.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	RusherHackInstaller.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

RusherHackInstaller.exe

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features	RusherHackInstaller.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	RusherHackInstaller.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
19	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
1704	schtasks.exe
4732	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

Processes:

PING.EXE

pid	Process
1640	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

powershell.exeRusherHackInstaller.exeRusherHackInstaller.exe

pid	Process
3700	powershell.exe
3700	powershell.exe
4324	RusherHackInstaller.exe
4324	RusherHackInstaller.exe
4324	RusherHackInstaller.exe
4324	RusherHackInstaller.exe
4324	RusherHackInstaller.exe
4324	RusherHackInstaller.exe
4324	RusherHackInstaller.exe
1092	RusherHackInstaller.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

RusherHackInstaller.exepowershell.exewindowsrc.exeRusherHackInstaller.exe

description	pid	Process
Token: SeDebugPrivilege	4324	RusherHackInstaller.exe
Token: SeDebugPrivilege	3700	powershell.exe
Token: SeDebugPrivilege	2436	windowsrc.exe
Token: SeDebugPrivilege	2436	windowsrc.exe
Token: SeDebugPrivilege	1092	RusherHackInstaller.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

windowsrc.exe

pid	Process
2436	windowsrc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

RusherHackInstaller.exewindowsrc.execmd.execmd.exe

description	pid	Process	procid_target
PID 4324 wrote to memory of 1704	4324	RusherHackInstaller.exe	85
PID 4324 wrote to memory of 1704	4324	RusherHackInstaller.exe	85
PID 4324 wrote to memory of 1704	4324	RusherHackInstaller.exe	85
PID 4324 wrote to memory of 2436	4324	RusherHackInstaller.exe	87
PID 4324 wrote to memory of 2436	4324	RusherHackInstaller.exe	87
PID 4324 wrote to memory of 2436	4324	RusherHackInstaller.exe	87
PID 4324 wrote to memory of 3700	4324	RusherHackInstaller.exe	88
PID 4324 wrote to memory of 3700	4324	RusherHackInstaller.exe	88
PID 4324 wrote to memory of 3700	4324	RusherHackInstaller.exe	88
PID 2436 wrote to memory of 4732	2436	windowsrc.exe	90
PID 2436 wrote to memory of 4732	2436	windowsrc.exe	90
PID 2436 wrote to memory of 4732	2436	windowsrc.exe	90
PID 4324 wrote to memory of 972	4324	RusherHackInstaller.exe	95
PID 4324 wrote to memory of 972	4324	RusherHackInstaller.exe	95
PID 4324 wrote to memory of 972	4324	RusherHackInstaller.exe	95
PID 972 wrote to memory of 1144	972	cmd.exe	97
PID 972 wrote to memory of 1144	972	cmd.exe	97
PID 972 wrote to memory of 1144	972	cmd.exe	97
PID 4324 wrote to memory of 2480	4324	RusherHackInstaller.exe	99
PID 4324 wrote to memory of 2480	4324	RusherHackInstaller.exe	99
PID 4324 wrote to memory of 2480	4324	RusherHackInstaller.exe	99
PID 2480 wrote to memory of 2016	2480	cmd.exe	101
PID 2480 wrote to memory of 2016	2480	cmd.exe	101
PID 2480 wrote to memory of 2016	2480	cmd.exe	101
PID 2480 wrote to memory of 1640	2480	cmd.exe	102
PID 2480 wrote to memory of 1640	2480	cmd.exe	102
PID 2480 wrote to memory of 1640	2480	cmd.exe	102
PID 2480 wrote to memory of 1092	2480	cmd.exe	110
PID 2480 wrote to memory of 1092	2480	cmd.exe	110
PID 2480 wrote to memory of 1092	2480	cmd.exe	110

C:\Users\Admin\AppData\Local\Temp\Rusher Hack\RusherHackInstaller.exe
"C:\Users\Admin\AppData\Local\Temp\Rusher Hack\RusherHackInstaller.exe"
1⤵
- Checks computer location settings
- Windows security modification
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4324
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Windows Registry Handler" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Rusher Hack\RusherHackInstaller.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1704
- 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:2436
- - 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:4732
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3700
- 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:972
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
    3⤵
    PID:1144
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\ItwhoH060tNW.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2480
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:2016
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 10 localhost
    3⤵
    - Runs ping.exe
    PID:1640
- - C:\Users\Admin\AppData\Local\Temp\Rusher Hack\RusherHackInstaller.exe
    "C:\Users\Admin\AppData\Local\Temp\Rusher Hack\RusherHackInstaller.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1092

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\RusherHackInstaller.exe.log

Filesize
1KB

MD5
10eab9c2684febb5327b6976f2047587

SHA1
a12ed54146a7f5c4c580416aecb899549712449e

SHA256
f49dbd55029bfbc15134f7c6a4f967d6c39142c63f2e8f1f8c78fab108a2c928

SHA512
7e5fd90fffae723bd0c662a90e0730b507805f072771ee673d1d8c262dbf60c8a03ba5fe088f699a97c2e886380de158b2ccd59ee62e3d012dd6dd14ea9d0e50

Download Submit
C:\Users\Admin\AppData\Local\Temp\ItwhoH060tNW.bat

Filesize
228B

MD5
990f638b53a65c6fd6117119a75c4913

SHA1
bf75255f063b1aec9d13ed5ab510a0188e4855ce

SHA256
49a97220575b0912644bb32125b0f4c403e47f0521cc6f78473b88347b2162b4

SHA512
872cd5436cd5a7aa6400a1ba4a5f12f982baa0c1b3de18a99bd0771554bc72c88fc51dd3962a9a74f042165b670a4cfde073400a63a8425de5d840b895166bb0

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

Filesize
683KB

MD5
a8b9706ed1ca326d4673b88fed84db23

SHA1
72fb18cdcd67d83fe1484b8ff93ba477e8082f7d

SHA256
bfc55cb35294fba322924cd2fe7ab9e79875b2cca66419ee5ef6d675b895349c

SHA512
89c5706bba41e6b25ad1f4431eba26df9145c2292f0c42c64c688851c1882004814bf4444f8013efc1504b4bb2bbb4d11896fec7c2e42088604eedadd28ebb9b

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

Filesize
683KB

MD5
a8b9706ed1ca326d4673b88fed84db23

SHA1
72fb18cdcd67d83fe1484b8ff93ba477e8082f7d

SHA256
bfc55cb35294fba322924cd2fe7ab9e79875b2cca66419ee5ef6d675b895349c

SHA512
89c5706bba41e6b25ad1f4431eba26df9145c2292f0c42c64c688851c1882004814bf4444f8013efc1504b4bb2bbb4d11896fec7c2e42088604eedadd28ebb9b

Download Submit
memory/972-158-0x0000000000000000-mapping.dmp

Download
memory/1092-164-0x0000000000000000-mapping.dmp

Download
memory/1144-159-0x0000000000000000-mapping.dmp

Download
memory/1640-163-0x0000000000000000-mapping.dmp

Download
memory/1704-136-0x0000000000000000-mapping.dmp

Download
memory/2016-162-0x0000000000000000-mapping.dmp

Download
memory/2436-137-0x0000000000000000-mapping.dmp

Download
memory/2436-147-0x0000000006BC0000-0x0000000006BCA000-memory.dmp

Filesize
40KB

Download
memory/2480-160-0x0000000000000000-mapping.dmp

Download
memory/3700-148-0x00000000062D0000-0x0000000006302000-memory.dmp

Filesize
200KB

Download
memory/3700-154-0x0000000007290000-0x0000000007326000-memory.dmp

Filesize
600KB

Download
memory/3700-145-0x0000000005D10000-0x0000000005D2E000-memory.dmp

Filesize
120KB

Download
memory/3700-139-0x0000000000000000-mapping.dmp

Download
memory/3700-143-0x0000000004D50000-0x0000000004D72000-memory.dmp

Filesize
136KB

Download
memory/3700-141-0x00000000023E0000-0x0000000002416000-memory.dmp

Filesize
216KB

Download
memory/3700-149-0x0000000070610000-0x000000007065C000-memory.dmp

Filesize
304KB

Download
memory/3700-150-0x00000000062B0000-0x00000000062CE000-memory.dmp

Filesize
120KB

Download
memory/3700-151-0x0000000007660000-0x0000000007CDA000-memory.dmp

Filesize
6.5MB

Download
memory/3700-152-0x0000000007010000-0x000000000702A000-memory.dmp

Filesize
104KB

Download
memory/3700-153-0x0000000007080000-0x000000000708A000-memory.dmp

Filesize
40KB

Download
memory/3700-144-0x0000000004DF0000-0x0000000004E56000-memory.dmp

Filesize
408KB

Download
memory/3700-155-0x0000000007240000-0x000000000724E000-memory.dmp

Filesize
56KB

Download
memory/3700-156-0x0000000007350000-0x000000000736A000-memory.dmp

Filesize
104KB

Download
memory/3700-157-0x0000000007330000-0x0000000007338000-memory.dmp

Filesize
32KB

Download
memory/3700-142-0x0000000005040000-0x0000000005668000-memory.dmp

Filesize
6.2MB

Download
memory/4324-130-0x0000000000550000-0x0000000000600000-memory.dmp

Filesize
704KB

Download
memory/4324-135-0x00000000061F0000-0x000000000622C000-memory.dmp

Filesize
240KB

Download
memory/4324-134-0x0000000005DC0000-0x0000000005DD2000-memory.dmp

Filesize
72KB

Download
memory/4324-133-0x00000000051E0000-0x0000000005246000-memory.dmp

Filesize
408KB

Download
memory/4324-132-0x0000000005040000-0x00000000050D2000-memory.dmp

Filesize
584KB

Download
memory/4324-131-0x0000000005550000-0x0000000005AF4000-memory.dmp

Filesize
5.6MB

Download
memory/4732-146-0x0000000000000000-mapping.dmp

Download