mercurialgrabber | hxxps://github[.]com/xsplitst/RGF/archive/refs/heads/main[.]zip

Virtualization/Sandbox Evasion

Processes:

RBF.exe

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

Processes:

RBF.exe

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

Processes:

RBF.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	RBF.exe

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

Web Service

T1102

Processes:

flow	ioc
3	discord.com
35	discord.com
36	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
1	ip4.seeip.org
2	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:

RBF.exe

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

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217

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

Processes:

RBF.exe

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 2 IoCs

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

Query Registry

System Information Discovery

Processes:

RBF.exe

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

Enumerates system info in registry 2 TTPs 7 IoCs

Query Registry

System Information Discovery

Processes:

RBF.exemsedge.exe

description	ioc	Process
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
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	msedge.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer	msedge.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemProductName	msedge.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosInformation	RBF.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemManufacturer	RBF.exe

Modifies registry class 1 IoCs

Processes:

msedge.exe

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1735401866-3802634615-1355934272-1000_Classes\Local Settings	msedge.exe

NTFS ADS 1 IoCs

Processes:

msedge.exe

description	ioc	Process
File opened for modification	C:\Users\Admin\Downloads\RGF-main.zip:Zone.Identifier	msedge.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

msedge.exemsedge.exemsedge.exemsedge.exeidentity_helper.exe

pid	Process
1992	msedge.exe
1992	msedge.exe
4544	msedge.exe
4544	msedge.exe
1492	msedge.exe
1492	msedge.exe
1984	msedge.exe
1984	msedge.exe
3096	identity_helper.exe
3096	identity_helper.exe

Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 7 IoCs

Processes:

msedge.exe

pid	Process
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

RBF.exe

description	pid	Process
Token: SeDebugPrivilege	4700	RBF.exe

Suspicious use of FindShellTrayWindow 41 IoCs

Processes:

msedge.exe

pid	Process
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe

Suspicious use of SendNotifyMessage 16 IoCs

Processes:

msedge.exe

pid	Process
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe
4544	msedge.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

msedge.exe

description	pid	Process	procid_target
PID 4544 wrote to memory of 3384	4544	msedge.exe	81
PID 4544 wrote to memory of 3384	4544	msedge.exe	81
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 400	4544	msedge.exe	82
PID 4544 wrote to memory of 1992	4544	msedge.exe	83
PID 4544 wrote to memory of 1992	4544	msedge.exe	83
PID 4544 wrote to memory of 5024	4544	msedge.exe	84
PID 4544 wrote to memory of 5024	4544	msedge.exe	84
PID 4544 wrote to memory of 5024	4544	msedge.exe	84
PID 4544 wrote to memory of 5024	4544	msedge.exe	84
PID 4544 wrote to memory of 5024	4544	msedge.exe	84
PID 4544 wrote to memory of 5024	4544	msedge.exe	84
PID 4544 wrote to memory of 5024	4544	msedge.exe	84
PID 4544 wrote to memory of 5024	4544	msedge.exe	84
PID 4544 wrote to memory of 5024	4544	msedge.exe	84
PID 4544 wrote to memory of 5024	4544	msedge.exe	84
PID 4544 wrote to memory of 5024	4544	msedge.exe	84
PID 4544 wrote to memory of 5024	4544	msedge.exe	84
PID 4544 wrote to memory of 5024	4544	msedge.exe	84
PID 4544 wrote to memory of 5024	4544	msedge.exe	84
PID 4544 wrote to memory of 5024	4544	msedge.exe	84
PID 4544 wrote to memory of 5024	4544	msedge.exe	84
PID 4544 wrote to memory of 5024	4544	msedge.exe	84
PID 4544 wrote to memory of 5024	4544	msedge.exe	84
PID 4544 wrote to memory of 5024	4544	msedge.exe	84
PID 4544 wrote to memory of 5024	4544	msedge.exe	84

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --single-argument https://github.com/xsplitst/RGF/archive/refs/heads/main.zip
1⤵
- Enumerates system info in registry
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:4544
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" --annotation=IsOfficialBuild=1 --annotation=channel= --annotation=chromium-version=90.0.4430.212 "--annotation=exe=C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --annotation=plat=Win64 "--annotation=prod=Microsoft Edge" --annotation=ver=90.0.818.66 --initial-client-data=0x100,0x104,0x108,0xdc,0x10c,0x7fff5cf63cb8,0x7fff5cf63cc8,0x7fff5cf63cd8
  2⤵
  PID:3384
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=1924,6625668498646958392,9145822681803021662,131072 --gpu-preferences=SAAAAAAAAADgAAAwAAAAAAAAAAAAAAAAAABgAAAAAAAoAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAB4AAAAAAAAAHgAAAAAAAAAKAAAAAQAAAAgAAAAAAAAACgAAAAAAAAAMAAAAAAAAAA4AAAAAAAAABAAAAAAAAAAAAAAAAUAAAAQAAAAAAAAAAAAAAAGAAAAEAAAAAAAAAABAAAABQAAABAAAAAAAAAAAQAAAAYAAAAIAAAAAAAAAAgAAAAAAAAA --mojo-platform-channel-handle=1904 /prefetch:2
  2⤵
  PID:400
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --field-trial-handle=1924,6625668498646958392,9145822681803021662,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2396 /prefetch:3
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:1992
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --field-trial-handle=1924,6625668498646958392,9145822681803021662,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2640 /prefetch:8
  2⤵
  PID:5024
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1924,6625668498646958392,9145822681803021662,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3232 /prefetch:1
  2⤵
  PID:2080
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1924,6625668498646958392,9145822681803021662,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3264 /prefetch:1
  2⤵
  PID:340
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1924,6625668498646958392,9145822681803021662,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5112 /prefetch:1
  2⤵
  PID:2752
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=quarantine.mojom.Quarantine --field-trial-handle=1924,6625668498646958392,9145822681803021662,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5164 /prefetch:8
  2⤵
  - NTFS ADS
  - Suspicious behavior: EnumeratesProcesses
  PID:1492
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1924,6625668498646958392,9145822681803021662,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=10 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5616 /prefetch:1
  2⤵
  PID:2544
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1924,6625668498646958392,9145822681803021662,131072 --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=11 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5636 /prefetch:1
  2⤵
  PID:3636
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1924,6625668498646958392,9145822681803021662,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=12 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=4016 /prefetch:1
  2⤵
  PID:4808
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1924,6625668498646958392,9145822681803021662,131072 --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=13 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=6040 /prefetch:1
  2⤵
  PID:476
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --field-trial-handle=1924,6625668498646958392,9145822681803021662,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5864 /prefetch:8
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:1984
- C:\Program Files (x86)\Microsoft\Edge\Application\90.0.818.66\identity_helper.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\90.0.818.66\identity_helper.exe" --type=utility --utility-sub-type=winrt_app_id.mojom.WinrtAppIdService --field-trial-handle=1924,6625668498646958392,9145822681803021662,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=6220 /prefetch:8
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:3096

C:\Windows\System32\CompPkgSrv.exe
C:\Windows\System32\CompPkgSrv.exe -Embedding
1⤵
PID:2204

C:\Windows\System32\CompPkgSrv.exe
C:\Windows\System32\CompPkgSrv.exe -Embedding
1⤵
PID:4084

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:1136

C:\Users\Admin\AppData\Local\Temp\Temp1_RGF-main.zip\RGF-main\RBF.exe
"C:\Users\Admin\AppData\Local\Temp\Temp1_RGF-main.zip\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:4700

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

Discovery

Browser Information Discovery

T1217

Peripheral Device Discovery

T1120

Query Registry

System Information Discovery

Virtualization/Sandbox Evasion