orcus | 8e2de94aa59d77bb4ba00b39e5b4dddf69321a558975388c666f51084339a03e

Analysis

max time kernel
149s
max time network
151s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
01-01-2025 21:07

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General

Target

AimAssist.exe
Size

839KB
MD5

9232f68810b230913f7b46b2db02d8a1
SHA1

afece387cdf0f80acf98f57589234b584a8e13c4
SHA256

8e2de94aa59d77bb4ba00b39e5b4dddf69321a558975388c666f51084339a03e
SHA512

8169ccfd632b590040335c5b59db1a9a50d477795c4e00c49ba3b846e3d2cdc839e3cc2e3f2ebc8450d8f9bced96e596d11cd74cf5a789d29ba49476364f5488
SSDEEP

24576:SxdS04YNEMuExDiU6E5R9s8xY/2l/d2tnIbt+r2:GP4auS+UjfU2T2dIbt+r

Score

10^/10

orcus discovery evasion persistence rat spyware stealer trojan

Malware Config

Extracted

Family

orcus

3buy-response.gl.at.ply.gg

Mutex

20bafa3dc96e4ee8b82bbe11a3472987

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
%appdata%\Microsoft\Speech\AudioDriver.exe
installservice
false
keylogger_enabled
false
newcreationdate
01/01/2025 13:05:49
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

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, mandela.exe"	Mandela.exe

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

UAC bypass 3 TTPs 1 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	Mandela.exe

Executes dropped EXE 2 IoCs

pid	Process
2448	AudioDriver.exe
2116	Mandela.exe

Loads dropped DLL 2 IoCs

pid	Process
2792	AimAssist.exe
2448	AudioDriver.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	Mandela.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	Mandela.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\mandela.exe	Mandela.exe
File opened for modification	C:\Windows\mandela.exe	Mandela.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	AimAssist.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AudioDriver.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2384	taskkill.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2448	AudioDriver.exe
2448	AudioDriver.exe
2448	AudioDriver.exe
2116	Mandela.exe
2116	Mandela.exe
2448	AudioDriver.exe
2448	AudioDriver.exe
2448	AudioDriver.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2116	Mandela.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	2448	AudioDriver.exe
Token: SeDebugPrivilege	2116	Mandela.exe
Token: SeTakeOwnershipPrivilege	2116	Mandela.exe
Token: SeTakeOwnershipPrivilege	2116	Mandela.exe
Token: 33	2156	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	2156	AUDIODG.EXE
Token: 33	2156	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	2156	AUDIODG.EXE
Token: SeDebugPrivilege	2384	taskkill.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
2448	AudioDriver.exe
2116	Mandela.exe

Suspicious use of SendNotifyMessage 64 IoCs

pid	Process
2448	AudioDriver.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe
2116	Mandela.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2792 wrote to memory of 2448	2792	AimAssist.exe	29
PID 2792 wrote to memory of 2448	2792	AimAssist.exe	29
PID 2792 wrote to memory of 2448	2792	AimAssist.exe	29
PID 2792 wrote to memory of 2448	2792	AimAssist.exe	29
PID 2448 wrote to memory of 2116	2448	AudioDriver.exe	31
PID 2448 wrote to memory of 2116	2448	AudioDriver.exe	31
PID 2448 wrote to memory of 2116	2448	AudioDriver.exe	31
PID 2448 wrote to memory of 2116	2448	AudioDriver.exe	31
PID 2116 wrote to memory of 1692	2116	Mandela.exe	33
PID 2116 wrote to memory of 1692	2116	Mandela.exe	33
PID 2116 wrote to memory of 1692	2116	Mandela.exe	33
PID 1692 wrote to memory of 2384	1692	cmd.exe	35
PID 1692 wrote to memory of 2384	1692	cmd.exe	35
PID 1692 wrote to memory of 2384	1692	cmd.exe	35

System policy modification 1 TTPs 2 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\FilterAdministratorToken = "1"	Mandela.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	Mandela.exe

C:\Users\Admin\AppData\Local\Temp\AimAssist.exe
"C:\Users\Admin\AppData\Local\Temp\AimAssist.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2792
- C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2448
- - C:\Users\Admin\AppData\Local\Temp\Mandela.exe
    "C:\Users\Admin\AppData\Local\Temp\Mandela.exe"
    3⤵
    - Modifies WinLogon for persistence
    - UAC bypass
    - Executes dropped EXE
    - Checks whether UAC is enabled
    - Drops file in Windows directory
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of SendNotifyMessage
    - Suspicious use of WriteProcessMemory
    - System policy modification
    PID:2116
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /k taskkill /f /im explorer.exe
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1692
    - - C:\Windows\system32\taskkill.exe
        
        taskkill /f /im explorer.exe
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2384

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x4fc
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2156

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab4C4E.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

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

Filesize
15.2MB

MD5
68558a4a7df242046a8a7345501adcf7

SHA1
eac84b6bc1be332af4bafc1bdac30b40041a1295

SHA256
c6818da28a36a7ed628e5a86ede3a642b609b34b2f61ae4dba9a4814d6822d2f

SHA512
160f2d35cabd161c1bb4372de42dff907550b929675f8e450130de0a0f60e703bdad0eb6398437d92db4337b5c3d885dcca398c04af61ff8fe20757f6658dc08

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe

Filesize
839KB

MD5
9232f68810b230913f7b46b2db02d8a1

SHA1
afece387cdf0f80acf98f57589234b584a8e13c4

SHA256
8e2de94aa59d77bb4ba00b39e5b4dddf69321a558975388c666f51084339a03e

SHA512
8169ccfd632b590040335c5b59db1a9a50d477795c4e00c49ba3b846e3d2cdc839e3cc2e3f2ebc8450d8f9bced96e596d11cd74cf5a789d29ba49476364f5488

Download Submit
memory/2116-45-0x000000001B6B0000-0x000000001B708000-memory.dmp

Filesize
352KB

Download
memory/2116-42-0x0000000000E00000-0x0000000000E0C000-memory.dmp

Filesize
48KB

Download
memory/2116-43-0x0000000003260000-0x0000000003268000-memory.dmp

Filesize
32KB

Download
memory/2116-44-0x000000001B6A0000-0x000000001B6B4000-memory.dmp

Filesize
80KB

Download
memory/2116-41-0x0000000027810000-0x00000000298C2000-memory.dmp

Filesize
32.7MB

Download
memory/2116-40-0x0000000000E10000-0x0000000001D44000-memory.dmp

Filesize
15.2MB

Download
memory/2448-12-0x00000000745E0000-0x0000000074B8B000-memory.dmp

Filesize
5.7MB

Download
memory/2448-32-0x00000000745E0000-0x0000000074B8B000-memory.dmp

Filesize
5.7MB

Download
memory/2448-33-0x00000000745E0000-0x0000000074B8B000-memory.dmp

Filesize
5.7MB

Download
memory/2448-15-0x00000000745E0000-0x0000000074B8B000-memory.dmp

Filesize
5.7MB

Download
memory/2448-13-0x00000000745E0000-0x0000000074B8B000-memory.dmp

Filesize
5.7MB

Download
memory/2448-14-0x00000000745E0000-0x0000000074B8B000-memory.dmp

Filesize
5.7MB

Download
memory/2792-11-0x00000000745E0000-0x0000000074B8B000-memory.dmp

Filesize
5.7MB

Download
memory/2792-0-0x00000000745E1000-0x00000000745E2000-memory.dmp

Filesize
4KB

Download
memory/2792-2-0x00000000745E0000-0x0000000074B8B000-memory.dmp

Filesize
5.7MB

Download
memory/2792-1-0x00000000745E0000-0x0000000074B8B000-memory.dmp

Filesize
5.7MB

Download