mercurialgrabber | aff971e3e4484669c73c912ab3fed84dab8b9ce036d0ac717abe2fbf176276e1

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions	OK.EXE

Looks for VMWare Tools registry key 2 TTPs 1 IoCs

defense_evasion

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\VMWare, Inc.\VMWare Tools	OK.EXE

Checks BIOS information in registry 2 TTPs 1 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	OK.EXE

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-308834014-1004923324-1191300197-1000\Control Panel\International\Geo\Nation	2025-04-03_76ea72164dd28c5f3e8a1bc5f2762b5c_amadey_esfury_rhadamanthys_smoke-loader.exe

Executes dropped EXE 2 IoCs

pid	Process
3936	MERCURIAL.EXE
5492	OK.EXE

Obfuscated with Agile.Net obfuscator 11 IoCs

Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

agilenet

resource	yara_rule
behavioral1/memory/3936-33-0x0000000004F90000-0x0000000004FAC000-memory.dmp	agile_net
behavioral1/memory/3936-34-0x0000000004FC0000-0x0000000004FE0000-memory.dmp	agile_net
behavioral1/memory/3936-35-0x0000000004FE0000-0x0000000005000000-memory.dmp	agile_net
behavioral1/memory/3936-36-0x0000000005020000-0x0000000005030000-memory.dmp	agile_net
behavioral1/memory/3936-37-0x0000000005030000-0x0000000005044000-memory.dmp	agile_net
behavioral1/memory/3936-39-0x0000000005050000-0x000000000506E000-memory.dmp	agile_net
behavioral1/memory/3936-38-0x0000000005170000-0x00000000051DE000-memory.dmp	agile_net
behavioral1/memory/3936-42-0x0000000005260000-0x000000000526E000-memory.dmp	agile_net
behavioral1/memory/3936-41-0x0000000005240000-0x000000000524E000-memory.dmp	agile_net
behavioral1/memory/3936-40-0x0000000005200000-0x0000000005236000-memory.dmp	agile_net
behavioral1/memory/3936-43-0x0000000005BD0000-0x0000000005D1A000-memory.dmp	agile_net

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service

T1102

flow	ioc
37	discord.com
34	discord.com
35	discord.com

Looks up external IP address via web service 2 IoCs

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

flow	ioc
6	ip4.seeip.org
32	ip-api.com

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

Peripheral Device Discovery

T1120

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	OK.EXE
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	OK.EXE

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/4192-0-0x0000000000CA0000-0x0000000001019000-memory.dmp	upx
behavioral1/memory/4192-23-0x0000000000CA0000-0x0000000001019000-memory.dmp	upx

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	2025-04-03_76ea72164dd28c5f3e8a1bc5f2762b5c_amadey_esfury_rhadamanthys_smoke-loader.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MERCURIAL.EXE

Checks SCSI registry key(s) 3 TTPs 1 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

Peripheral Device Discovery

T1120

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_VMware_&Prod_VMware_Virtual_S	OK.EXE

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	OK.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	OK.EXE

Enumerates system info in registry 2 TTPs 4 IoCs

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosInformation	OK.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemManufacturer	OK.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemProductName	OK.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Logical Unit Id 0	OK.EXE

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3936	MERCURIAL.EXE
3936	MERCURIAL.EXE
3936	MERCURIAL.EXE
3936	MERCURIAL.EXE
3936	MERCURIAL.EXE
3936	MERCURIAL.EXE
3936	MERCURIAL.EXE
3936	MERCURIAL.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5492	OK.EXE
Token: SeDebugPrivilege	3936	MERCURIAL.EXE

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4192 wrote to memory of 3936	4192	2025-04-03_76ea72164dd28c5f3e8a1bc5f2762b5c_amadey_esfury_rhadamanthys_smoke-loader.exe	88
PID 4192 wrote to memory of 3936	4192	2025-04-03_76ea72164dd28c5f3e8a1bc5f2762b5c_amadey_esfury_rhadamanthys_smoke-loader.exe	88
PID 4192 wrote to memory of 3936	4192	2025-04-03_76ea72164dd28c5f3e8a1bc5f2762b5c_amadey_esfury_rhadamanthys_smoke-loader.exe	88
PID 4192 wrote to memory of 5492	4192	2025-04-03_76ea72164dd28c5f3e8a1bc5f2762b5c_amadey_esfury_rhadamanthys_smoke-loader.exe	89
PID 4192 wrote to memory of 5492	4192	2025-04-03_76ea72164dd28c5f3e8a1bc5f2762b5c_amadey_esfury_rhadamanthys_smoke-loader.exe	89

C:\Users\Admin\AppData\Local\Temp\2025-04-03_76ea72164dd28c5f3e8a1bc5f2762b5c_amadey_esfury_rhadamanthys_smoke-loader.exe
"C:\Users\Admin\AppData\Local\Temp\2025-04-03_76ea72164dd28c5f3e8a1bc5f2762b5c_amadey_esfury_rhadamanthys_smoke-loader.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4192
- C:\Users\Admin\AppData\Local\Temp\MERCURIAL.EXE
  "C:\Users\Admin\AppData\Local\Temp\MERCURIAL.EXE"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3936
- C:\Users\Admin\AppData\Local\Temp\OK.EXE
  "C:\Users\Admin\AppData\Local\Temp\OK.EXE"
  2⤵
  - Looks for VirtualBox Guest Additions in registry
  - Looks for VMWare Tools registry key
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Maps connected drives based on registry
  - Checks SCSI registry key(s)
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of AdjustPrivilegeToken
  PID:5492

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

System Information Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion