orcus | 7b7b51a0b246edc07ce106ecd362d46565e16018635160a6394b5aa47bb9e14b

General

Target

ezz.exe
Size

839KB
MD5

a9a2e25c8246f12b57772f3bf80a21e3
SHA1

364f350fded32f413889da44ed1bb8ad6a1e59c0
SHA256

7b7b51a0b246edc07ce106ecd362d46565e16018635160a6394b5aa47bb9e14b
SHA512

badd84614356c1599abcd4d702bbb8a01332325a38859888f53cb39174d928f8029bc342af267552bda56ba11e4d81c8cdd03570ac1128eae61b6be96149b46c
SSDEEP

24576:DpS04YNEMuExDiU6E5R9s8xY/2l/dmtnIbt+rE:DL4auS+UjfU2TmdIbt+r

Score

10^/10

orcus discovery rat spyware stealer

Malware Config

Extracted

Family

orcus

C2

0.tcp.ngrok.io

Mutex

82e2789fd09c4b619c81f6d93a412b7d

Attributes

administration_rights_required
false
anti_debugger
false
anti_tcp_analyzer
false
antivm
false
autostart_method
1
change_creation_date
false
force_installer_administrator_privileges
false
hide_file
false
install
false
installation_folder
%temp%\Microsoft\Speech\AudioDriver.exe
installservice
false
keylogger_enabled
false
newcreationdate
04/19/2023 16:47:30
plugins
AgEAAA==
reconnect_delay
10000
registry_autostart_keyname
Audio HD Driver
registry_hidden_autostart
false
set_admin_flag
false
tasksch_name
Audio HD Driver
tasksch_request_highest_privileges
false
try_other_autostart_onfail
false

aes.plain

Signatures

Orcus
Orcus is a Remote Access Trojan that is being sold on underground forums.
rat spyware stealer orcus
Orcus family
orcus

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1898866115-3160784972-1217720036-1000\Control Panel\International\Geo\Nation	ezz.exe

Executes dropped EXE 2 IoCs

pid	Process
3256	WindowsInput.exe
1304	AudioDriver.exe

Drops desktop.ini file(s) 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\assembly\Desktop.ini	ezz.exe
File created	C:\Windows\assembly\Desktop.ini	ezz.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 1 IoCs

Web Service

T1102

flow	ioc
7	0.tcp.ngrok.io

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\WindowsInput.exe	ezz.exe
File opened for modification	C:\Windows\SysWOW64\WindowsInput.InstallLog	WindowsInput.exe
File created	C:\Windows\SysWOW64\WindowsInput.InstallState	WindowsInput.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\assembly\Desktop.ini	ezz.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	ezz.exe
File opened for modification	C:\Windows\assembly	ezz.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ezz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AudioDriver.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1304	AudioDriver.exe
1304	AudioDriver.exe
1304	AudioDriver.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1304	AudioDriver.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1304	AudioDriver.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1304	AudioDriver.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2856 wrote to memory of 3256	2856	ezz.exe	84
PID 2856 wrote to memory of 3256	2856	ezz.exe	84
PID 2856 wrote to memory of 1304	2856	ezz.exe	85
PID 2856 wrote to memory of 1304	2856	ezz.exe	85
PID 2856 wrote to memory of 1304	2856	ezz.exe	85

C:\Users\Admin\AppData\Local\Temp\ezz.exe
"C:\Users\Admin\AppData\Local\Temp\ezz.exe"
1⤵
- Checks computer location settings
- Drops desktop.ini file(s)
- Drops file in System32 directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2856
- C:\Windows\SysWOW64\WindowsInput.exe
  "C:\Windows\SysWOW64\WindowsInput.exe" --install
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  PID:3256
- C:\Users\Admin\AppData\Local\Temp\Microsoft\Speech\AudioDriver.exe
  "C:\Users\Admin\AppData\Local\Temp\Microsoft\Speech\AudioDriver.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:1304

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Microsoft\Speech\AudioDriver.exe

Filesize
839KB

MD5
a9a2e25c8246f12b57772f3bf80a21e3

SHA1
364f350fded32f413889da44ed1bb8ad6a1e59c0

SHA256
7b7b51a0b246edc07ce106ecd362d46565e16018635160a6394b5aa47bb9e14b

SHA512
badd84614356c1599abcd4d702bbb8a01332325a38859888f53cb39174d928f8029bc342af267552bda56ba11e4d81c8cdd03570ac1128eae61b6be96149b46c

Download Submit
C:\Windows\SysWOW64\WindowsInput.InstallLog

Filesize
597B

MD5
c2291863df7c2d3038ce3c22fa276506

SHA1
7b7d2bc07a6c35523807342c747c9b6a19f3184e

SHA256
14504199bede3f46129969dbd2b7680f2e5b7fcd73a3e427ce1bb6217a6d13da

SHA512
00bf40174a67e3e663d18a887c5b461a1e5ead0b27f0a139d87969158c58f4ca72cfa5a731dda239356192ca4cb5ac6ae2b0e37401d534e686cabacd3cbee8fa

Download Submit
C:\Windows\SysWOW64\WindowsInput.exe

Filesize
21KB

MD5
e854a4636afc652b320e12e50ba4080e

SHA1
8a4ac6ecc22ee5f3a8ec846d38b41ff18c641fdc

SHA256
94b9c78c6fa2bf61fba20a08ad4563f7dd2f5668c28eff227965ce0a2032d5d5

SHA512
30aabd5079b6ed0948eb70fd18e9166096e4ba5d1d47fc35b7270f931d19bbe6cd929b6010f70297bf5272dc5a79e2523721354d211c4080d68ad8d17e316118

Download Submit
memory/1304-61-0x00000000748E0000-0x0000000074E91000-memory.dmp

Filesize
5.7MB

Download
memory/1304-63-0x00000000748E0000-0x0000000074E91000-memory.dmp

Filesize
5.7MB

Download
memory/1304-60-0x00000000748E0000-0x0000000074E91000-memory.dmp

Filesize
5.7MB

Download
memory/1304-59-0x00000000748E0000-0x0000000074E91000-memory.dmp

Filesize
5.7MB

Download
memory/1304-57-0x00000000748E0000-0x0000000074E91000-memory.dmp

Filesize
5.7MB

Download
memory/1304-58-0x00000000748E0000-0x0000000074E91000-memory.dmp

Filesize
5.7MB

Download
memory/1304-56-0x00000000748E2000-0x00000000748E3000-memory.dmp

Filesize
4KB

Download
memory/2856-0-0x00000000748E2000-0x00000000748E3000-memory.dmp

Filesize
4KB

Download
memory/2856-2-0x00000000748E0000-0x0000000074E91000-memory.dmp

Filesize
5.7MB

Download
memory/2856-55-0x00000000748E0000-0x0000000074E91000-memory.dmp

Filesize
5.7MB

Download
memory/2856-1-0x00000000748E0000-0x0000000074E91000-memory.dmp

Filesize
5.7MB

Download
memory/3256-21-0x000000001B620000-0x000000001B640000-memory.dmp

Filesize
128KB

Download
memory/3256-52-0x00007FF805210000-0x00007FF805BB1000-memory.dmp

Filesize
9.6MB

Download
memory/3256-35-0x000000001C810000-0x000000001C8AC000-memory.dmp

Filesize
624KB

Download
memory/3256-34-0x000000001C2A0000-0x000000001C76E000-memory.dmp

Filesize
4.8MB

Download
memory/3256-26-0x000000001B940000-0x000000001B964000-memory.dmp

Filesize
144KB

Download
memory/3256-23-0x00007FF805210000-0x00007FF805BB1000-memory.dmp

Filesize
9.6MB

Download
memory/3256-22-0x00007FF805210000-0x00007FF805BB1000-memory.dmp

Filesize
9.6MB

Download
memory/3256-20-0x000000001B5E0000-0x000000001B5F8000-memory.dmp

Filesize
96KB

Download
memory/3256-19-0x00007FF8054C5000-0x00007FF8054C6000-memory.dmp

Filesize
4KB

Download

Analysis

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