mercurialgrabber | baf1e179e63392ebdd6e59a1765d9ffe307ca28e22681f855bf2f71a0280d538

System Information Discovery

Processes:

2024-06-11_2d2da9e3a1b925524f8f3beded725a51_cova_ryuk.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-06-11_2d2da9e3a1b925524f8f3beded725a51_cova_ryuk.exe

Executes dropped EXE 2 IoCs

Processes:

DiscordNuker.exeUpdate.exe

pid process

1740 DiscordNuker.exe
3180 Update.exe
Reads user/profile data of web browsers 2 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
Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service
T1102

Processes:

flow ioc

3 raw.githubusercontent.com
9 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.

Processes:

flow ioc

2 ip4.seeip.org
6 ip-api.com

pid	process
1740	DiscordNuker.exe
3180	Update.exe

flow	ioc
3	raw.githubusercontent.com
9	discord.com

flow	ioc
2	ip4.seeip.org
6	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

Processes:

DiscordNuker.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	DiscordNuker.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	DiscordNuker.exe

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

System Information Discovery
T1082
Checks SCSI registry key(s) 3 TTPs 1 IoCs
SCSI information is often read in order to detect sandboxing environments.

Query Registry
T1012

Peripheral Device Discovery
T1120

System Information Discovery
T1082

Processes:

DiscordNuker.exe

description ioc process

Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_VMware_&Prod_VMware_Virtual_S DiscordNuker.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_VMware_&Prod_VMware_Virtual_S	DiscordNuker.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

Processes:

DiscordNuker.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	DiscordNuker.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	DiscordNuker.exe

Enumerates processes with tasklist 1 TTPs 1 IoCs

Process Discovery
T1057

Processes:

tasklist.exe

pid process

1020 tasklist.exe

pid	process
1020	tasklist.exe

Enumerates system info in registry 2 TTPs 4 IoCs

Query Registry

System Information Discovery

Processes:

DiscordNuker.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosInformation	DiscordNuker.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemManufacturer	DiscordNuker.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemProductName	DiscordNuker.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Logical Unit Id 0	DiscordNuker.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

DiscordNuker.exetasklist.exe

description pid process

Token: SeDebugPrivilege 1740 DiscordNuker.exe
Token: SeDebugPrivilege 1020 tasklist.exe

description	pid	process
Token: SeDebugPrivilege	1740	DiscordNuker.exe
Token: SeDebugPrivilege	1020	tasklist.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

2024-06-11_2d2da9e3a1b925524f8f3beded725a51_cova_ryuk.exeUpdate.execmd.exe

description	pid	process	target process
PID 2904 wrote to memory of 1740	2904	2024-06-11_2d2da9e3a1b925524f8f3beded725a51_cova_ryuk.exe	DiscordNuker.exe
PID 2904 wrote to memory of 1740	2904	2024-06-11_2d2da9e3a1b925524f8f3beded725a51_cova_ryuk.exe	DiscordNuker.exe
PID 2904 wrote to memory of 3180	2904	2024-06-11_2d2da9e3a1b925524f8f3beded725a51_cova_ryuk.exe	Update.exe
PID 2904 wrote to memory of 3180	2904	2024-06-11_2d2da9e3a1b925524f8f3beded725a51_cova_ryuk.exe	Update.exe
PID 3180 wrote to memory of 4580	3180	Update.exe	cmd.exe
PID 3180 wrote to memory of 4580	3180	Update.exe	cmd.exe
PID 4580 wrote to memory of 1020	4580	cmd.exe	tasklist.exe
PID 4580 wrote to memory of 1020	4580	cmd.exe	tasklist.exe

C:\Users\Admin\AppData\Local\Temp\2024-06-11_2d2da9e3a1b925524f8f3beded725a51_cova_ryuk.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-11_2d2da9e3a1b925524f8f3beded725a51_cova_ryuk.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2904
- C:\DiscordNuker.exe
  "C:\DiscordNuker.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:1740
- C:\Update.exe
  "C:\Update.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:3180
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /d /s /c "tasklist"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4580
  - - C:\Windows\system32\tasklist.exe
      tasklist
      4⤵
      Enumerates processes with tasklist
      Suspicious use of AdjustPrivilegeToken
      PID:1020

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4036,i,10373433614523925616,13586256558317053467,262144 --variations-seed-version --mojo-platform-channel-handle=4200 /prefetch:8
1⤵
PID:3836

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

Process Discovery

Query Registry

System Information Discovery

7

Virtualization/Sandbox Evasion

2

T1497

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service