mercurialgrabber | 33461d788a33b88bed3d489826f9fb766cae421f322b81c5eb861718a1dea7bb

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions	RBF.exe

Looks for VMWare Tools registry key 2 TTPs 1 IoCs

evasion

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\VMWare, Inc.\VMWare Tools	RBF.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	RBF.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 3 IoCs

Web Service

T1102

flow	ioc
16	discord.com
11	discord.com
12	discord.com

Looks up external IP address via web service 3 IoCs

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

flow	ioc
1	ip4.seeip.org
2	ip4.seeip.org
9	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	RBF.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	RBF.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	RBF.exe

Checks processor information in registry 2 TTPs 7 IoCs

Processor 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\CentralProcessor\0\VendorIdentifier	firefox.exe
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	RBF.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	RBF.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	firefox.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Update Signature	firefox.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Update Revision	firefox.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~Mhz	firefox.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	RBF.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemManufacturer	RBF.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemProductName	RBF.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Logical Unit Id 0	RBF.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000_Classes\Local Settings	firefox.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	4620	RBF.exe
Token: SeDebugPrivilege	1580	firefox.exe
Token: SeDebugPrivilege	1580	firefox.exe
Token: SeDebugPrivilege	1580	firefox.exe
Token: SeDebugPrivilege	1580	firefox.exe
Token: SeDebugPrivilege	1580	firefox.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
1580	firefox.exe
1580	firefox.exe
1580	firefox.exe
1580	firefox.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
1580	firefox.exe
1580	firefox.exe
1580	firefox.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1580	firefox.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 4560 wrote to memory of 1580	4560	firefox.exe	107
PID 4560 wrote to memory of 1580	4560	firefox.exe	107
PID 4560 wrote to memory of 1580	4560	firefox.exe	107
PID 4560 wrote to memory of 1580	4560	firefox.exe	107
PID 4560 wrote to memory of 1580	4560	firefox.exe	107
PID 4560 wrote to memory of 1580	4560	firefox.exe	107
PID 4560 wrote to memory of 1580	4560	firefox.exe	107
PID 4560 wrote to memory of 1580	4560	firefox.exe	107
PID 4560 wrote to memory of 1580	4560	firefox.exe	107
PID 4560 wrote to memory of 1580	4560	firefox.exe	107
PID 4560 wrote to memory of 1580	4560	firefox.exe	107
PID 1580 wrote to memory of 5032	1580	firefox.exe	108
PID 1580 wrote to memory of 5032	1580	firefox.exe	108
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4452	1580	firefox.exe	109
PID 1580 wrote to memory of 4144	1580	firefox.exe	110
PID 1580 wrote to memory of 4144	1580	firefox.exe	110
PID 1580 wrote to memory of 4144	1580	firefox.exe	110

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\RGF-main\RBF.exe
"C:\Users\Admin\AppData\Local\Temp\RGF-main\RBF.exe"
1⤵
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Checks BIOS information in registry
- 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:4620

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 --mojo-platform-channel-handle=3996 --field-trial-handle=2280,i,1836084024518340990,18250262151825427757,262144 --variations-seed-version /prefetch:8
1⤵
PID:5820

C:\Program Files\Mozilla Firefox\firefox.exe
"C:\Program Files\Mozilla Firefox\firefox.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4560
- C:\Program Files\Mozilla Firefox\firefox.exe
  "C:\Program Files\Mozilla Firefox\firefox.exe"
  2⤵
  - Checks processor information in registry
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1580
- - C:\Program Files\Mozilla Firefox\firefox.exe
    "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="1580.0.25825262\653010099" -parentBuildID 20221007134813 -prefsHandle 1864 -prefMapHandle 1880 -prefsLen 20749 -prefMapSize 233444 -appDir "C:\Program Files\Mozilla Firefox\browser" - {9d70cf7f-5847-4d21-84fa-3079eb1d7efd} 1580 "\\.\pipe\gecko-crash-server-pipe.1580" 1980 20b231ce158 gpu
    3⤵
    PID:5032
- - C:\Program Files\Mozilla Firefox\firefox.exe
    "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="1580.1.1572690353\1537483660" -parentBuildID 20221007134813 -prefsHandle 2352 -prefMapHandle 2340 -prefsLen 20785 -prefMapSize 233444 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {57f18813-5873-46ef-afd6-e8ec1ebde54a} 1580 "\\.\pipe\gecko-crash-server-pipe.1580" 2380 20b1676ce58 socket
    3⤵
    PID:4452
- - C:\Program Files\Mozilla Firefox\firefox.exe
    "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="1580.2.567203208\1326830004" -childID 1 -isForBrowser -prefsHandle 3136 -prefMapHandle 3008 -prefsLen 20823 -prefMapSize 233444 -jsInitHandle 1412 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {3abd2cde-ee32-483a-843e-d9564fa0060e} 1580 "\\.\pipe\gecko-crash-server-pipe.1580" 3124 20b273a1b58 tab
    3⤵
    PID:4144
- - C:\Program Files\Mozilla Firefox\firefox.exe
    "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="1580.3.1640396610\1778456369" -childID 2 -isForBrowser -prefsHandle 3776 -prefMapHandle 3772 -prefsLen 26066 -prefMapSize 233444 -jsInitHandle 1412 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {8a947d42-c1fd-49cc-81e9-b9a25b320fe5} 1580 "\\.\pipe\gecko-crash-server-pipe.1580" 3784 20b1675ac58 tab
    3⤵
    PID:1452
- - C:\Program Files\Mozilla Firefox\firefox.exe
    "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="1580.4.660453965\957859265" -childID 3 -isForBrowser -prefsHandle 4088 -prefMapHandle 4060 -prefsLen 26066 -prefMapSize 233444 -jsInitHandle 1412 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {0e0f3a52-53df-41be-bce7-c397994d3a53} 1580 "\\.\pipe\gecko-crash-server-pipe.1580" 3776 20b22efcf58 tab
    3⤵
    PID:4916
- - C:\Program Files\Mozilla Firefox\firefox.exe
    "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="1580.5.1837837202\1394863219" -childID 4 -isForBrowser -prefsHandle 5116 -prefMapHandle 5084 -prefsLen 26206 -prefMapSize 233444 -jsInitHandle 1412 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {c753b8f4-0317-4695-a684-27d88748ff09} 1580 "\\.\pipe\gecko-crash-server-pipe.1580" 5096 20b28dd8158 tab
    3⤵
    PID:1924
- - C:\Program Files\Mozilla Firefox\firefox.exe
    "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="1580.6.1949364887\1729477973" -childID 5 -isForBrowser -prefsHandle 5160 -prefMapHandle 5164 -prefsLen 26206 -prefMapSize 233444 -jsInitHandle 1412 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {67af211a-6651-485c-bb3b-a962c93716f2} 1580 "\\.\pipe\gecko-crash-server-pipe.1580" 5152 20b28dd7858 tab
    3⤵
    PID:3876
- - C:\Program Files\Mozilla Firefox\firefox.exe
    "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="1580.7.1163726838\1179366797" -childID 6 -isForBrowser -prefsHandle 5348 -prefMapHandle 5352 -prefsLen 26206 -prefMapSize 233444 -jsInitHandle 1412 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {dc3dff98-6608-42c5-a78a-e0beb9b8729a} 1580 "\\.\pipe\gecko-crash-server-pipe.1580" 5336 20b28dd9658 tab
    3⤵
    PID:3732

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

System Information Discovery

Virtualization/Sandbox Evasion