quasar | 545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80

Analysis

max time kernel
147s
max time network
160s
platform
windows7_x64
resource
win7-20220414-en
submitted
08-05-2022 07:37

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General

Target

545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80.exe
Size

625KB
MD5

0ab869a3a06f47cd99e5164e76d0ed33
SHA1

19a4f343aeafa888b1b45e95f238ef537cbfe451
SHA256

545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80
SHA512

46987f55f6674a74606d2b106036d35b2c95b4ce4eceb3355132881fc9f730e4f1ef31d874ee1d271ddfb1ed0a21f665c99966a0c531b073fe3b42ad5bd1e0da

Score

10^/10

quasar venomrat 1 persistence rat rootkit spyware stealer suricata trojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

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
behavioral1/files/0x0007000000014b58-64.dat	disable_win_def
behavioral1/files/0x0007000000014b58-66.dat	disable_win_def
behavioral1/files/0x0007000000014b58-67.dat	disable_win_def
behavioral1/memory/2044-68-0x0000000001230000-0x00000000012BC000-memory.dmp	disable_win_def

Quasar Payload 4 IoCs

Processes:

resource	yara_rule
behavioral1/files/0x0007000000014b58-64.dat	family_quasar
behavioral1/files/0x0007000000014b58-66.dat	family_quasar
behavioral1/files/0x0007000000014b58-67.dat	family_quasar
behavioral1/memory/2044-68-0x0000000001230000-0x00000000012BC000-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 W32/Quasar 1.3/Venom RAT Connectivity Check 3
suricata: ET MALWARE W32/Quasar 1.3/Venom RAT Connectivity Check 3
suricata

Executes dropped EXE 2 IoCs

Processes:

Passwords.exeIwpblky.exe

pid	Process
952	Passwords.exe
2044	Iwpblky.exe

Loads dropped DLL 5 IoCs

Processes:

545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80.exePasswords.exe

pid	Process
1036	545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80.exe
1036	545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80.exe
1036	545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80.exe
1036	545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80.exe
952	Passwords.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Iwpblky.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows\CurrentVersion\Run\Windows Defender = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Iwpblky.exe\""	Iwpblky.exe

Looks up external IP address via web service 2 IoCs

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

Processes:

flow	ioc
1	ip-api.com
5	api.ipify.org

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
1088	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Iwpblky.exe

description	pid	Process
Token: SeDebugPrivilege	2044	Iwpblky.exe
Token: SeDebugPrivilege	2044	Iwpblky.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

DllHost.exe

pid	Process
2024	DllHost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Iwpblky.exe

pid	Process
2044	Iwpblky.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80.exePasswords.exeIwpblky.exe

description	pid	Process	procid_target
PID 1036 wrote to memory of 952	1036	545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80.exe	28
PID 1036 wrote to memory of 952	1036	545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80.exe	28
PID 1036 wrote to memory of 952	1036	545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80.exe	28
PID 1036 wrote to memory of 952	1036	545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80.exe	28
PID 952 wrote to memory of 2044	952	Passwords.exe	29
PID 952 wrote to memory of 2044	952	Passwords.exe	29
PID 952 wrote to memory of 2044	952	Passwords.exe	29
PID 952 wrote to memory of 2044	952	Passwords.exe	29
PID 2044 wrote to memory of 1088	2044	Iwpblky.exe	32
PID 2044 wrote to memory of 1088	2044	Iwpblky.exe	32
PID 2044 wrote to memory of 1088	2044	Iwpblky.exe	32
PID 2044 wrote to memory of 1088	2044	Iwpblky.exe	32

C:\Users\Admin\AppData\Local\Temp\545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80.exe
"C:\Users\Admin\AppData\Local\Temp\545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1036
- C:\Users\Admin\AppData\Local\Temp\RarSFX0\Passwords.exe
  "C:\Users\Admin\AppData\Local\Temp\RarSFX0\Passwords.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:952
- - C:\Users\Admin\AppData\Local\Temp\Iwpblky.exe
    "C:\Users\Admin\AppData\Local\Temp\Iwpblky.exe"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2044
  - - C:\Windows\SysWOW64\schtasks.exe
      "schtasks" /create /tn "Windows Defender" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Iwpblky.exe" /rl HIGHEST /f
      4⤵
      Creates scheduled task(s)
      PID:1088

C:\Windows\SysWOW64\DllHost.exe
C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
1⤵
- Suspicious use of FindShellTrayWindow
PID:2024

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

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
C:\Users\Admin\AppData\Local\Temp\RarSFX0\Passwords.exe

Filesize
351KB

MD5
ce5ad18cc090c8a1405f084d9144671d

SHA1
67530a17331ad6477e4b25ef866412349791a3cb

SHA256
bf79b08db6040f007e6ba07e7628388df2ab9f666e75b16e230d3e9d8600ab31

SHA512
66f3d07eb12c2a94f30fd37dadf832769fb87d10be3751f91ac474f4e72d86b535c5159f7fe2ac80500a844e9a7ace0db1d6dac69c1150475f03c207b9e8bc2a

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\Passwords.exe

Filesize
351KB

MD5
ce5ad18cc090c8a1405f084d9144671d

SHA1
67530a17331ad6477e4b25ef866412349791a3cb

SHA256
bf79b08db6040f007e6ba07e7628388df2ab9f666e75b16e230d3e9d8600ab31

SHA512
66f3d07eb12c2a94f30fd37dadf832769fb87d10be3751f91ac474f4e72d86b535c5159f7fe2ac80500a844e9a7ace0db1d6dac69c1150475f03c207b9e8bc2a

Download Submit
\Users\Admin\AppData\Local\Temp\Iwpblky.exe

Filesize
534KB

MD5
7877fc84e5fad8018d10fedee3fd7b4e

SHA1
ee58d0a7ee2db778d20bf292393696614443fefa

SHA256
2a2e8ebc771d27fc3b32a7e059e1f9aa458324cb225ebea2b4bed0acd191e1be

SHA512
ba5a3e9072876c89f1c2bb40e748fd6eb7ae0c9eb99756ab4bcd1bb5d5b1dedb1e517b0e3efd354cf3ed58bb3c49b8d365d340d95781b8eb8577e22ab0675175

Download Submit
\Users\Admin\AppData\Local\Temp\RarSFX0\Passwords.exe

Filesize
351KB

MD5
ce5ad18cc090c8a1405f084d9144671d

SHA1
67530a17331ad6477e4b25ef866412349791a3cb

SHA256
bf79b08db6040f007e6ba07e7628388df2ab9f666e75b16e230d3e9d8600ab31

SHA512
66f3d07eb12c2a94f30fd37dadf832769fb87d10be3751f91ac474f4e72d86b535c5159f7fe2ac80500a844e9a7ace0db1d6dac69c1150475f03c207b9e8bc2a

Download Submit
\Users\Admin\AppData\Local\Temp\RarSFX0\Passwords.exe

Filesize
351KB

MD5
ce5ad18cc090c8a1405f084d9144671d

SHA1
67530a17331ad6477e4b25ef866412349791a3cb

SHA256
bf79b08db6040f007e6ba07e7628388df2ab9f666e75b16e230d3e9d8600ab31

SHA512
66f3d07eb12c2a94f30fd37dadf832769fb87d10be3751f91ac474f4e72d86b535c5159f7fe2ac80500a844e9a7ace0db1d6dac69c1150475f03c207b9e8bc2a

Download Submit
\Users\Admin\AppData\Local\Temp\RarSFX0\Passwords.exe

Filesize
351KB

MD5
ce5ad18cc090c8a1405f084d9144671d

SHA1
67530a17331ad6477e4b25ef866412349791a3cb

SHA256
bf79b08db6040f007e6ba07e7628388df2ab9f666e75b16e230d3e9d8600ab31

SHA512
66f3d07eb12c2a94f30fd37dadf832769fb87d10be3751f91ac474f4e72d86b535c5159f7fe2ac80500a844e9a7ace0db1d6dac69c1150475f03c207b9e8bc2a

Download Submit
\Users\Admin\AppData\Local\Temp\RarSFX0\Passwords.exe

Filesize
351KB

MD5
ce5ad18cc090c8a1405f084d9144671d

SHA1
67530a17331ad6477e4b25ef866412349791a3cb

SHA256
bf79b08db6040f007e6ba07e7628388df2ab9f666e75b16e230d3e9d8600ab31

SHA512
66f3d07eb12c2a94f30fd37dadf832769fb87d10be3751f91ac474f4e72d86b535c5159f7fe2ac80500a844e9a7ace0db1d6dac69c1150475f03c207b9e8bc2a

Download Submit
memory/952-62-0x0000000000400000-0x0000000000460000-memory.dmp

Filesize
384KB

Download
memory/952-59-0x0000000000000000-mapping.dmp

Download
memory/1036-54-0x0000000075941000-0x0000000075943000-memory.dmp

Filesize
8KB

Download
memory/1088-72-0x0000000000000000-mapping.dmp

Download
memory/2044-65-0x0000000000000000-mapping.dmp

Download
memory/2044-68-0x0000000001230000-0x00000000012BC000-memory.dmp

Filesize
560KB

Download