orcus | 2c37e02bdc9b3e4cceb432473d5a547fc0ed31d5d35ee141fb9247eed45458e0

General

Target

ezz.exe
Size

839KB
MD5

26dbe3f6d0e41f748f3e9f98d428ae5b
SHA1

6e4217522845257c5b3c6760428b80fa236213b1
SHA256

2c37e02bdc9b3e4cceb432473d5a547fc0ed31d5d35ee141fb9247eed45458e0
SHA512

83bc701441fc46f887e071561c5b4ec6b249fe0b0b12d3ed53de3362fd86054327bf64435280c7cb5f1c6cb124a557f249868b7142d44c017f34b84be5b9e879
SSDEEP

24576:ldS04YNEMuExDiU6E5R9s8xY/2l/drtnIbt+r2:lP4auS+UjfU2TrdIbt+r

Score

10^/10

orcus discovery rat spyware stealer

Malware Config

Extracted

Family

orcus

C2

0.tcp.ngrok.io

Mutex

47bbbbf2f5b241a6984c03087fdadaff

Attributes

administration_rights_required
false
anti_debugger
false
anti_tcp_analyzer
false
antivm
false
change_creation_date
false
force_installer_administrator_privileges
false
hide_file
false
install
false
installation_folder
%appdata%\Microsoft\Speech\AudioDriver.exe
installservice
false
keylogger_enabled
false
newcreationdate
02/18/2022 16:44:16
plugins
AgEAAA==
reconnect_delay
10000
registry_hidden_autostart
false
set_admin_flag
false
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-1-5-21-3982764349-3037452555-3708423086-1000\Control Panel\International\Geo\Nation	ezz.exe

Executes dropped EXE 2 IoCs

pid	Process
3744	WindowsInput.exe
3780	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 opened for modification	C:\Windows\assembly	ezz.exe
File created	C:\Windows\assembly\Desktop.ini	ezz.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	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
3780	AudioDriver.exe
3780	AudioDriver.exe
3780	AudioDriver.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3780	AudioDriver.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3780	AudioDriver.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3780	AudioDriver.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3448 wrote to memory of 3744	3448	ezz.exe	81
PID 3448 wrote to memory of 3744	3448	ezz.exe	81
PID 3448 wrote to memory of 3780	3448	ezz.exe	82
PID 3448 wrote to memory of 3780	3448	ezz.exe	82
PID 3448 wrote to memory of 3780	3448	ezz.exe	82

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:3448
- C:\Windows\SysWOW64\WindowsInput.exe
  "C:\Windows\SysWOW64\WindowsInput.exe" --install
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  PID:3744
- C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe
  "C:\Users\Admin\AppData\Roaming\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:3780

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\Roaming\Microsoft\Speech\AudioDriver.exe

Filesize
839KB

MD5
26dbe3f6d0e41f748f3e9f98d428ae5b

SHA1
6e4217522845257c5b3c6760428b80fa236213b1

SHA256
2c37e02bdc9b3e4cceb432473d5a547fc0ed31d5d35ee141fb9247eed45458e0

SHA512
83bc701441fc46f887e071561c5b4ec6b249fe0b0b12d3ed53de3362fd86054327bf64435280c7cb5f1c6cb124a557f249868b7142d44c017f34b84be5b9e879

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/3448-0-0x0000000074812000-0x0000000074813000-memory.dmp

Filesize
4KB

Download
memory/3448-1-0x0000000074810000-0x0000000074DC1000-memory.dmp

Filesize
5.7MB

Download
memory/3448-2-0x0000000074810000-0x0000000074DC1000-memory.dmp

Filesize
5.7MB

Download
memory/3448-56-0x0000000074810000-0x0000000074DC1000-memory.dmp

Filesize
5.7MB

Download
memory/3744-34-0x000000001BEE0000-0x000000001C3AE000-memory.dmp

Filesize
4.8MB

Download
memory/3744-20-0x0000000000B40000-0x0000000000B58000-memory.dmp

Filesize
96KB

Download
memory/3744-26-0x000000001B580000-0x000000001B5A4000-memory.dmp

Filesize
144KB

Download
memory/3744-22-0x00007FFF26A80000-0x00007FFF27421000-memory.dmp

Filesize
9.6MB

Download
memory/3744-35-0x000000001C450000-0x000000001C4EC000-memory.dmp

Filesize
624KB

Download
memory/3744-21-0x0000000000B80000-0x0000000000BA0000-memory.dmp

Filesize
128KB

Download
memory/3744-52-0x00007FFF26A80000-0x00007FFF27421000-memory.dmp

Filesize
9.6MB

Download
memory/3744-23-0x00007FFF26A80000-0x00007FFF27421000-memory.dmp

Filesize
9.6MB

Download
memory/3744-19-0x00007FFF26D35000-0x00007FFF26D36000-memory.dmp

Filesize
4KB

Download
memory/3780-58-0x0000000074810000-0x0000000074DC1000-memory.dmp

Filesize
5.7MB

Download
memory/3780-57-0x0000000074810000-0x0000000074DC1000-memory.dmp

Filesize
5.7MB

Download
memory/3780-55-0x0000000074812000-0x0000000074813000-memory.dmp

Filesize
4KB

Download
memory/3780-59-0x0000000074810000-0x0000000074DC1000-memory.dmp

Filesize
5.7MB

Download
memory/3780-61-0x0000000074810000-0x0000000074DC1000-memory.dmp

Filesize
5.7MB

Download

Analysis

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