Analysis Overview
SHA256
604d490b9d5dfff01c9fceb085798c6b42f5778c9f125457be654dc4f436ab04
Threat Level: Known bad
The file RvcDownloader.exe was found to be: Known bad.
Malicious Activity Summary
njRAT/Bladabindi
Executes dropped EXE
Checks computer location settings
Drops startup file
Enumerates connected drives
Legitimate hosting services abused for malware hosting/C2
Adds Run key to start application
Suspicious use of NtSetInformationThreadHideFromDebugger
Enumerates physical storage devices
Unsigned PE
Suspicious use of SendNotifyMessage
Checks SCSI registry key(s)
Creates scheduled task(s)
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-02-03 15:56
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-02-03 15:56
Reported
2024-02-03 15:59
Platform
win10v2004-20231215-en
Max time kernel
150s
Max time network
153s
Command Line
Signatures
njRAT/Bladabindi
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\RvcDownloader.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Java update.exe | C:\Users\Admin\AppData\Local\Temp\Dllhost.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Java update.exe | C:\Users\Admin\AppData\Local\Temp\Dllhost.exe | N/A |
| File opened for modification | \??\c:\users\admin\appdata\roaming\microsoft\windows\start menu\programs\startup\java update.exe | C:\Windows\system32\taskmgr.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Dllhost.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Server.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Server.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Server.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-983843758-932321429-1636175382-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Update = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Dllhost.exe\" .." | C:\Users\Admin\AppData\Local\Temp\Dllhost.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Update = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Dllhost.exe\" .." | C:\Users\Admin\AppData\Local\Temp\Dllhost.exe | N/A |
Enumerates connected drives
| Description | Indicator | Process | Target |
| File opened (read-only) | \??\B: | C:\Windows\system32\unregmp2.exe | N/A |
| File opened (read-only) | \??\G: | C:\Windows\system32\unregmp2.exe | N/A |
| File opened (read-only) | \??\H: | C:\Windows\system32\unregmp2.exe | N/A |
| File opened (read-only) | \??\J: | C:\Windows\system32\unregmp2.exe | N/A |
| File opened (read-only) | \??\L: | C:\Windows\system32\unregmp2.exe | N/A |
| File opened (read-only) | \??\O: | C:\Windows\system32\unregmp2.exe | N/A |
| File opened (read-only) | \??\K: | C:\Windows\system32\unregmp2.exe | N/A |
| File opened (read-only) | \??\M: | C:\Windows\system32\unregmp2.exe | N/A |
| File opened (read-only) | \??\V: | C:\Windows\system32\unregmp2.exe | N/A |
| File opened (read-only) | \??\W: | C:\Windows\system32\unregmp2.exe | N/A |
| File opened (read-only) | \??\X: | C:\Windows\system32\unregmp2.exe | N/A |
| File opened (read-only) | \??\A: | C:\Windows\system32\unregmp2.exe | N/A |
| File opened (read-only) | \??\P: | C:\Windows\system32\unregmp2.exe | N/A |
| File opened (read-only) | \??\Q: | C:\Windows\system32\unregmp2.exe | N/A |
| File opened (read-only) | \??\S: | C:\Windows\system32\unregmp2.exe | N/A |
| File opened (read-only) | \??\Z: | C:\Windows\system32\unregmp2.exe | N/A |
| File opened (read-only) | \??\E: | C:\Windows\system32\unregmp2.exe | N/A |
| File opened (read-only) | \??\I: | C:\Windows\system32\unregmp2.exe | N/A |
| File opened (read-only) | \??\N: | C:\Windows\system32\unregmp2.exe | N/A |
| File opened (read-only) | \??\R: | C:\Windows\system32\unregmp2.exe | N/A |
| File opened (read-only) | \??\T: | C:\Windows\system32\unregmp2.exe | N/A |
| File opened (read-only) | \??\U: | C:\Windows\system32\unregmp2.exe | N/A |
| File opened (read-only) | \??\Y: | C:\Windows\system32\unregmp2.exe | N/A |
Legitimate hosting services abused for malware hosting/C2
| Description | Indicator | Process | Target |
| N/A | 2.tcp.eu.ngrok.io | N/A | N/A |
Suspicious use of NtSetInformationThreadHideFromDebugger
Enumerates physical storage devices
Checks SCSI registry key(s)
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000 | C:\Windows\system32\taskmgr.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A | C:\Windows\system32\taskmgr.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName | C:\Windows\system32\taskmgr.exe | N/A |
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\RvcDownloader.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Dllhost.exe | N/A |
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\RvcDownloader.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Dllhost.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Server.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Server.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Server.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\RvcDownloader.exe
"C:\Users\Admin\AppData\Local\Temp\RvcDownloader.exe"
C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /4
C:\Users\Admin\AppData\Local\Temp\Dllhost.exe
"C:\Users\Admin\AppData\Local\Temp\Dllhost.exe"
C:\Windows\SysWOW64\schtasks.exe
schtasks /create /sc minute /mo 1 /tn Server /tr C:\Users\Admin\AppData\Local\Temp/Server.exe
C:\Users\Admin\AppData\Local\Temp\Server.exe
C:\Users\Admin\AppData\Local\Temp/Server.exe
C:\Program Files (x86)\Windows Media Player\wmplayer.exe
"C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /Play -Embedding
C:\Program Files (x86)\Windows Media Player\setup_wm.exe
"C:\Program Files (x86)\Windows Media Player\setup_wm.exe" /RunOnce:"C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /Play -Embedding
C:\Windows\SysWOW64\unregmp2.exe
"C:\Windows\System32\unregmp2.exe" /AsyncFirstLogon
C:\Windows\system32\unregmp2.exe
"C:\Windows\SysNative\unregmp2.exe" /AsyncFirstLogon /REENTRANT
C:\Users\Admin\AppData\Local\Temp\Server.exe
C:\Users\Admin\AppData\Local\Temp/Server.exe
C:\Users\Admin\AppData\Local\Temp\Server.exe
C:\Users\Admin\AppData\Local\Temp/Server.exe
Network
| Country | Destination | Domain | Proto |
| NL | 52.142.223.178:80 | tcp | |
| US | 8.8.8.8:53 | 183.142.211.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 210.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 68.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.106.137.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 2.tcp.eu.ngrok.io | udp |
| DE | 3.127.138.57:13538 | 2.tcp.eu.ngrok.io | tcp |
| US | 8.8.8.8:53 | 16.234.44.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 79.121.231.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 57.138.127.3.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 86.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 15.164.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | wmploc.dll | udp |
| DE | 3.127.138.57:13538 | 2.tcp.eu.ngrok.io | tcp |
| DE | 3.127.138.57:13538 | 2.tcp.eu.ngrok.io | tcp |
| US | 8.8.8.8:53 | 0.205.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 176.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 72.239.69.13.in-addr.arpa | udp |
Files
memory/3100-0-0x0000000000220000-0x0000000000594000-memory.dmp
memory/3100-2-0x0000000074A00000-0x00000000751B0000-memory.dmp
memory/3100-1-0x0000000000220000-0x0000000000594000-memory.dmp
memory/3100-3-0x0000000005750000-0x00000000057EC000-memory.dmp
memory/3100-4-0x0000000002F40000-0x0000000002F50000-memory.dmp
memory/3100-5-0x0000000005FA0000-0x0000000006544000-memory.dmp
memory/3100-6-0x0000000005A90000-0x0000000005B22000-memory.dmp
memory/2760-7-0x000001F5B16C0000-0x000001F5B16C1000-memory.dmp
memory/2760-8-0x000001F5B16C0000-0x000001F5B16C1000-memory.dmp
memory/2760-9-0x000001F5B16C0000-0x000001F5B16C1000-memory.dmp
memory/2760-13-0x000001F5B16C0000-0x000001F5B16C1000-memory.dmp
memory/2760-14-0x000001F5B16C0000-0x000001F5B16C1000-memory.dmp
memory/2760-15-0x000001F5B16C0000-0x000001F5B16C1000-memory.dmp
memory/2760-16-0x000001F5B16C0000-0x000001F5B16C1000-memory.dmp
memory/2760-17-0x000001F5B16C0000-0x000001F5B16C1000-memory.dmp
memory/2760-18-0x000001F5B16C0000-0x000001F5B16C1000-memory.dmp
memory/2760-19-0x000001F5B16C0000-0x000001F5B16C1000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\Dllhost.exe
| MD5 | 7f6ce9a396cae9d375cb1a56de268b84 |
| SHA1 | 4129cc4492f057cc2ec78c195c1badd7ab3d9c65 |
| SHA256 | 604d490b9d5dfff01c9fceb085798c6b42f5778c9f125457be654dc4f436ab04 |
| SHA512 | e3cfe5afbde8b7889767cd9556ddbff2a3652ab139f06f02ec27cbd638d05604b3cbd5dcc2732a62750ced77d32eeab69b92e7eca38fe434121611c8775c314d |
C:\Users\Admin\AppData\Local\Temp\Dllhost.exe
| MD5 | f41faa9212ef320eb6ed1aeac222ab93 |
| SHA1 | 1c111b75d430e33aeba08666664e4fa0930ed463 |
| SHA256 | 575ae4898ca0e80cca0e88c595d96ca20501cdfc3bd3908e8bc8d546e70718a4 |
| SHA512 | d1c8709b64ba7b76477bb2d20185603f4aa0fc9eeb538339f64f6f2e979d540f43f0c06ae0cecf7a1b236a4c1ef6c836308d6b872ea35783efb38e1cf6105d4b |
memory/1616-30-0x00000000000A0000-0x0000000000414000-memory.dmp
memory/3100-31-0x0000000000220000-0x0000000000594000-memory.dmp
memory/3100-32-0x0000000074A00000-0x00000000751B0000-memory.dmp
memory/1616-33-0x00000000000A0000-0x0000000000414000-memory.dmp
memory/1616-34-0x0000000074A00000-0x00000000751B0000-memory.dmp
memory/1616-35-0x00000000000A0000-0x0000000000414000-memory.dmp
memory/1616-36-0x0000000005500000-0x0000000005510000-memory.dmp
memory/3560-43-0x0000000000C60000-0x0000000000FD4000-memory.dmp
memory/3560-44-0x0000000074A00000-0x00000000751B0000-memory.dmp
memory/3560-45-0x0000000000C60000-0x0000000000FD4000-memory.dmp
memory/3560-46-0x0000000000C60000-0x0000000000FD4000-memory.dmp
memory/3560-47-0x0000000005D00000-0x0000000005D10000-memory.dmp
memory/3560-50-0x0000000000C60000-0x0000000000FD4000-memory.dmp
memory/3560-51-0x0000000074A00000-0x00000000751B0000-memory.dmp
memory/1616-52-0x00000000000A0000-0x0000000000414000-memory.dmp
memory/1616-53-0x0000000074A00000-0x00000000751B0000-memory.dmp
memory/1616-54-0x00000000054E0000-0x00000000054EA000-memory.dmp
memory/1616-55-0x0000000005830000-0x0000000005896000-memory.dmp
memory/1616-56-0x00000000068B0000-0x00000000068C8000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\wmsetup.log
| MD5 | 6598555afb4ddb6dd093adadce301469 |
| SHA1 | fce7ec371800175602a615abf24469abf6073c8a |
| SHA256 | b4906cebbf6d4ebeddab263c7c32fea23ed13a9cb8204162f72e196f13b424eb |
| SHA512 | 7b30ea0edaa4d281c1176506ebbdd659c51473b64aac61c444aa09b40264d4112ed5ae88796ccd98ec89d94bd33f05839f793b818858c62d275ae8c8e864147a |
C:\Users\Admin\AppData\Local\Microsoft\Windows Media\12.0\WMSDKNS.XML
| MD5 | 7050d5ae8acfbe560fa11073fef8185d |
| SHA1 | 5bc38e77ff06785fe0aec5a345c4ccd15752560e |
| SHA256 | cb87767c4a384c24e4a0f88455f59101b1ae7b4fb8de8a5adb4136c5f7ee545b |
| SHA512 | a7a295ac8921bb3dde58d4bcde9372ed59def61d4b7699057274960fa8c1d1a1daff834a93f7a0698e9e5c16db43af05e9fd2d6d7c9232f7d26ffcff5fc5900b |
C:\Users\Admin\AppData\Local\Microsoft\Media Player\CurrentDatabase_400.wmdb
| MD5 | fc240c081ec382df4b74d591d7d37a45 |
| SHA1 | 396e9d8accb2ff8b32e6c3957808cb87d23ad47c |
| SHA256 | 8cfeb277627a0fc9f2596c83dc37f9a3d8871293cd88dadd08f32098bf936038 |
| SHA512 | d8f83773c330b88b43f9ebc6220aa98368854e44a75b73a8575e7171f6c32e784d404e5a2e2e7787d3c71c0cfecdbb983631b639d9fee879b374d498d2ef0ab7 |
memory/1616-92-0x0000000006AF0000-0x0000000006AFA000-memory.dmp
memory/1616-94-0x0000000018990000-0x000000001899C000-memory.dmp
memory/1616-95-0x0000000005500000-0x0000000005510000-memory.dmp
memory/1616-96-0x0000000005500000-0x0000000005510000-memory.dmp
memory/1616-100-0x0000000005500000-0x0000000005510000-memory.dmp
memory/1616-101-0x0000000005500000-0x0000000005510000-memory.dmp
memory/656-104-0x0000000000C60000-0x0000000000FD4000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Server.exe.log
| MD5 | 25d1b50e7c0d451f3d850eb54d27ca05 |
| SHA1 | a238807715c70a335f54e80d4855644b21a9e870 |
| SHA256 | 650faa13e983c9046c9030f63a5fa1c33900432ec7cb3762e015da2e7c5b34a5 |
| SHA512 | 4223a26b2fabefdf1c01443ccc7bd887464d27f02694379895a040c66db472d541218d501f1c01e1bd31012d079a31baf24e20882c32cf652a09a74e3bf385f5 |
memory/656-106-0x0000000074A00000-0x00000000751B0000-memory.dmp
memory/656-107-0x0000000000C60000-0x0000000000FD4000-memory.dmp
memory/656-108-0x0000000005E30000-0x0000000005E40000-memory.dmp
memory/656-110-0x0000000000C60000-0x0000000000FD4000-memory.dmp
memory/656-111-0x0000000074A00000-0x00000000751B0000-memory.dmp
memory/5040-119-0x0000000000C60000-0x0000000000FD4000-memory.dmp
memory/5040-120-0x0000000074A00000-0x00000000751B0000-memory.dmp
memory/5040-121-0x0000000000C60000-0x0000000000FD4000-memory.dmp
memory/5040-122-0x0000000000C60000-0x0000000000FD4000-memory.dmp
memory/5040-123-0x00000000060A0000-0x00000000060B0000-memory.dmp
memory/5040-125-0x0000000000C60000-0x0000000000FD4000-memory.dmp
memory/5040-126-0x0000000074A00000-0x00000000751B0000-memory.dmp