quasar | bf79b08db6040f007e6ba07e7628388df2ab9f666e75b16e230d3e9d8600ab31

General

Target

bf79b08db6040f007e6ba07e7628388df2ab9f666e75b16e230d3e9d8600ab31.exe
Size

351KB
MD5

ce5ad18cc090c8a1405f084d9144671d
SHA1

67530a17331ad6477e4b25ef866412349791a3cb
SHA256

bf79b08db6040f007e6ba07e7628388df2ab9f666e75b16e230d3e9d8600ab31
SHA512

66f3d07eb12c2a94f30fd37dadf832769fb87d10be3751f91ac474f4e72d86b535c5159f7fe2ac80500a844e9a7ace0db1d6dac69c1150475f03c207b9e8bc2a

Score

10^/10

quasar venomrat 1 rat rootkit spyware stealer suricata trojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

1

C2

10.0.2.15:1337

Mutex

VNM_MUTEX_28broDsmlFWTzx7r3B

Attributes

encryption_key
0hi0YaDWMh7jhT37Tcsm
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Defender
subdirectory
SubDir

Signatures

Contains code to disable Windows Defender 4 IoCs

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

Processes:

resource	yara_rule
\Users\Admin\AppData\Local\Temp\Iwpblky.exe	disable_win_def
C:\Users\Admin\AppData\Local\Temp\Iwpblky.exe	disable_win_def
C:\Users\Admin\AppData\Local\Temp\Iwpblky.exe	disable_win_def
behavioral1/memory/2012-60-0x0000000000840000-0x00000000008CC000-memory.dmp	disable_win_def

Quasar Payload 4 IoCs

Processes:

resource	yara_rule
\Users\Admin\AppData\Local\Temp\Iwpblky.exe	family_quasar
C:\Users\Admin\AppData\Local\Temp\Iwpblky.exe	family_quasar
C:\Users\Admin\AppData\Local\Temp\Iwpblky.exe	family_quasar
behavioral1/memory/2012-60-0x0000000000840000-0x00000000008CC000-memory.dmp	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:

Iwpblky.exe

pid process

2012 Iwpblky.exe
Loads dropped DLL 1 IoCs

Processes:

bf79b08db6040f007e6ba07e7628388df2ab9f666e75b16e230d3e9d8600ab31.exe

pid process

1792 bf79b08db6040f007e6ba07e7628388df2ab9f666e75b16e230d3e9d8600ab31.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

2 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 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

1384 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Iwpblky.exe

description pid process

Token: SeDebugPrivilege 2012 Iwpblky.exe
Token: SeDebugPrivilege 2012 Iwpblky.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

DllHost.exe

pid process

1708 DllHost.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Iwpblky.exe

pid process

2012 Iwpblky.exe

pid	process
2012	Iwpblky.exe

pid	process
1792	bf79b08db6040f007e6ba07e7628388df2ab9f666e75b16e230d3e9d8600ab31.exe

flow	ioc
2	ip-api.com

pid	process
1384	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	2012	Iwpblky.exe
Token: SeDebugPrivilege	2012	Iwpblky.exe

pid	process
1708	DllHost.exe

pid	process
2012	Iwpblky.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

bf79b08db6040f007e6ba07e7628388df2ab9f666e75b16e230d3e9d8600ab31.exeIwpblky.exe

description	pid	process	target process
PID 1792 wrote to memory of 2012	1792	bf79b08db6040f007e6ba07e7628388df2ab9f666e75b16e230d3e9d8600ab31.exe	Iwpblky.exe
PID 1792 wrote to memory of 2012	1792	bf79b08db6040f007e6ba07e7628388df2ab9f666e75b16e230d3e9d8600ab31.exe	Iwpblky.exe
PID 1792 wrote to memory of 2012	1792	bf79b08db6040f007e6ba07e7628388df2ab9f666e75b16e230d3e9d8600ab31.exe	Iwpblky.exe
PID 1792 wrote to memory of 2012	1792	bf79b08db6040f007e6ba07e7628388df2ab9f666e75b16e230d3e9d8600ab31.exe	Iwpblky.exe
PID 2012 wrote to memory of 1384	2012	Iwpblky.exe	schtasks.exe
PID 2012 wrote to memory of 1384	2012	Iwpblky.exe	schtasks.exe
PID 2012 wrote to memory of 1384	2012	Iwpblky.exe	schtasks.exe
PID 2012 wrote to memory of 1384	2012	Iwpblky.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\bf79b08db6040f007e6ba07e7628388df2ab9f666e75b16e230d3e9d8600ab31.exe
"C:\Users\Admin\AppData\Local\Temp\bf79b08db6040f007e6ba07e7628388df2ab9f666e75b16e230d3e9d8600ab31.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1792

C:\Users\Admin\AppData\Local\Temp\Iwpblky.exe
"C:\Users\Admin\AppData\Local\Temp\Iwpblky.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2012

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "Windows Defender" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Iwpblky.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:1384

C:\Windows\SysWOW64\DllHost.exe
C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
1⤵
- Suspicious use of FindShellTrayWindow
PID:1708

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Iwpblky.exe
Filesize
534KB

MD5
7877fc84e5fad8018d10fedee3fd7b4e

SHA1
ee58d0a7ee2db778d20bf292393696614443fefa

SHA256
2a2e8ebc771d27fc3b32a7e059e1f9aa458324cb225ebea2b4bed0acd191e1be

SHA512
ba5a3e9072876c89f1c2bb40e748fd6eb7ae0c9eb99756ab4bcd1bb5d5b1dedb1e517b0e3efd354cf3ed58bb3c49b8d365d340d95781b8eb8577e22ab0675175

Download Submit
C:\Users\Admin\AppData\Local\Temp\Iwpblky.exe
Filesize
534KB

MD5
7877fc84e5fad8018d10fedee3fd7b4e

SHA1
ee58d0a7ee2db778d20bf292393696614443fefa

SHA256
2a2e8ebc771d27fc3b32a7e059e1f9aa458324cb225ebea2b4bed0acd191e1be

SHA512
ba5a3e9072876c89f1c2bb40e748fd6eb7ae0c9eb99756ab4bcd1bb5d5b1dedb1e517b0e3efd354cf3ed58bb3c49b8d365d340d95781b8eb8577e22ab0675175

Download Submit
C:\Users\Admin\AppData\Local\Temp\Jzgizllmjonfo.jpg
Filesize
18KB

MD5
482df92fbac57cd628c411930acc1be5

SHA1
72c1e39321c579358a456739df266277b1d16448

SHA256
db60af6f42acb7f58ad8a9267c9b59eb31f943023d08c48c1a35907f9aab54bf

SHA512
3976da093e141e0ca2caae12ed2317042b6ce402ccf897aac5b5a886ebd1e0dd94f80e9c19faed31ecdc49f1a522ed78a2f9b93c156ad0ca362aff3f7f1fc3e4

Download Submit
\Users\Admin\AppData\Local\Temp\Iwpblky.exe
Filesize
534KB

MD5
7877fc84e5fad8018d10fedee3fd7b4e

SHA1
ee58d0a7ee2db778d20bf292393696614443fefa

SHA256
2a2e8ebc771d27fc3b32a7e059e1f9aa458324cb225ebea2b4bed0acd191e1be

SHA512
ba5a3e9072876c89f1c2bb40e748fd6eb7ae0c9eb99756ab4bcd1bb5d5b1dedb1e517b0e3efd354cf3ed58bb3c49b8d365d340d95781b8eb8577e22ab0675175

Download Submit
memory/1384-64-0x0000000000000000-mapping.dmp

Download
memory/1792-54-0x0000000000400000-0x0000000000460000-memory.dmp

Filesize
384KB

Download
memory/1792-55-0x0000000075C51000-0x0000000075C53000-memory.dmp

Filesize
8KB

Download
memory/2012-57-0x0000000000000000-mapping.dmp

Download
memory/2012-60-0x0000000000840000-0x00000000008CC000-memory.dmp

Filesize
560KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads