Analysis Overview
SHA256
7c313a9892feb0bd975f6d8c1fe9ea0447adbf738c88353236079693046bb4d8
Threat Level: Known bad
The file f093f75b0c4fb499e79407a6f1e0677b_JaffaCakes118 was found to be: Known bad.
Malicious Activity Summary
Darkcomet
Modifies WinLogon for persistence
Executes dropped EXE
Uses the VBS compiler for execution
UPX packed file
Checks BIOS information in registry
Adds Run key to start application
Suspicious use of SetThreadContext
Drops file in Windows directory
Unsigned PE
Modifies registry class
Suspicious use of WriteProcessMemory
Enumerates system info in registry
Suspicious use of AdjustPrivilegeToken
Checks processor information in registry
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-15 07:30
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-15 07:30
Reported
2024-04-15 07:33
Platform
win10v2004-20240226-en
Max time kernel
143s
Max time network
151s
Command Line
Signatures
Darkcomet
Modifies WinLogon for persistence
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\WinDir\\Svchost.exe" | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
Checks BIOS information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\WinDir\Svchost.exe | N/A |
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Uses the VBS compiler for execution
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost.exe = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\svchost.exe\"" | C:\Users\Admin\AppData\Local\Temp\f093f75b0c4fb499e79407a6f1e0677b_JaffaCakes118.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Svchost = "C:\\Windows\\WinDir\\Svchost.exe" | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 3016 set thread context of 3216 | N/A | C:\Users\Admin\AppData\Local\Temp\f093f75b0c4fb499e79407a6f1e0677b_JaffaCakes118.exe | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\WinDir\Svchost.exe | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
| File opened for modification | C:\Windows\WinDir\Svchost.exe | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
| File opened for modification | C:\Windows\WinDir\ | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
Enumerates system info in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\ | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\f093f75b0c4fb499e79407a6f1e0677b_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f093f75b0c4fb499e79407a6f1e0677b_JaffaCakes118.exe"
C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
C:\Windows\SysWOW64\explorer.exe
"C:\Windows\SysWOW64\explorer.exe"
C:\Windows\WinDir\Svchost.exe
"C:\Windows\WinDir\Svchost.exe"
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=4080 --field-trial-handle=2328,i,5873823382323802923,13134441441264702821,262144 --variations-seed-version /prefetch:8
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 241.150.49.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 216.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 138.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 149.220.183.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 15.164.165.52.in-addr.arpa | udp |
| US | 13.107.253.64:443 | tcp | |
| US | 8.8.8.8:53 | 100.58.20.217.in-addr.arpa | udp |
| US | 8.8.8.8:53 | chromewebstore.googleapis.com | udp |
| US | 8.8.8.8:53 | chromewebstore.googleapis.com | udp |
| GB | 172.217.169.10:443 | chromewebstore.googleapis.com | tcp |
| US | 8.8.8.8:53 | pki.goog | udp |
| US | 8.8.8.8:53 | pki.goog | udp |
| US | 8.8.8.8:53 | 10.169.217.172.in-addr.arpa | udp |
| US | 216.239.32.29:80 | pki.goog | tcp |
| US | 8.8.8.8:53 | 29.32.239.216.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.229.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 89.65.42.20.in-addr.arpa | udp |
Files
memory/3016-0-0x0000000074FF0000-0x00000000755A1000-memory.dmp
memory/3016-1-0x0000000074FF0000-0x00000000755A1000-memory.dmp
memory/3016-2-0x0000000000B20000-0x0000000000B30000-memory.dmp
memory/3216-4-0x0000000000400000-0x00000000004E6000-memory.dmp
memory/3216-7-0x0000000000400000-0x00000000004E6000-memory.dmp
memory/3016-8-0x0000000074FF0000-0x00000000755A1000-memory.dmp
memory/3216-10-0x0000000000400000-0x00000000004E6000-memory.dmp
memory/3216-9-0x0000000000400000-0x00000000004E6000-memory.dmp
memory/3216-11-0x00000000027C0000-0x00000000027C1000-memory.dmp
memory/3216-12-0x0000000000400000-0x00000000004E6000-memory.dmp
C:\Windows\WinDir\Svchost.exe
| MD5 | d881de17aa8f2e2c08cbb7b265f928f9 |
| SHA1 | 08936aebc87decf0af6e8eada191062b5e65ac2a |
| SHA256 | b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0 |
| SHA512 | 5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34 |
memory/3216-72-0x0000000000400000-0x00000000004E6000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2024-04-15 07:30
Reported
2024-04-15 07:32
Platform
win7-20240221-en
Max time kernel
120s
Max time network
121s
Command Line
Signatures
Darkcomet
Modifies WinLogon for persistence
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\WinDir\\Svchost.exe" | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
Checks BIOS information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Uses the VBS compiler for execution
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost.exe = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\svchost.exe\"" | C:\Users\Admin\AppData\Local\Temp\f093f75b0c4fb499e79407a6f1e0677b_JaffaCakes118.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows\CurrentVersion\Run\Svchost = "C:\\Windows\\WinDir\\Svchost.exe" | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2020 set thread context of 1968 | N/A | C:\Users\Admin\AppData\Local\Temp\f093f75b0c4fb499e79407a6f1e0677b_JaffaCakes118.exe | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe |
| PID 1968 set thread context of 2644 | N/A | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | C:\Windows\SysWOW64\explorer.exe |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\WinDir\Svchost.exe | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
| File opened for modification | C:\Windows\WinDir\Svchost.exe | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
| File opened for modification | C:\Windows\WinDir\ | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
Enumerates system info in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier | C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe | N/A |
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\f093f75b0c4fb499e79407a6f1e0677b_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f093f75b0c4fb499e79407a6f1e0677b_JaffaCakes118.exe"
C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
C:\Windows\SysWOW64\explorer.exe
"C:\Windows\SysWOW64\explorer.exe"
Network
Files
memory/2020-0-0x0000000074700000-0x0000000074CAB000-memory.dmp
memory/2020-1-0x0000000074700000-0x0000000074CAB000-memory.dmp
memory/2020-2-0x0000000000970000-0x00000000009B0000-memory.dmp
memory/1968-4-0x0000000000400000-0x00000000004E6000-memory.dmp
memory/1968-6-0x0000000000400000-0x00000000004E6000-memory.dmp
memory/1968-8-0x0000000000400000-0x00000000004E6000-memory.dmp
memory/1968-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/1968-12-0x0000000000400000-0x00000000004E6000-memory.dmp
memory/2020-14-0x0000000074700000-0x0000000074CAB000-memory.dmp
memory/1968-15-0x0000000000400000-0x00000000004E6000-memory.dmp
memory/1968-16-0x0000000000400000-0x00000000004E6000-memory.dmp
memory/1968-17-0x0000000000400000-0x00000000004E6000-memory.dmp
memory/1968-18-0x0000000000400000-0x00000000004E6000-memory.dmp
memory/1968-19-0x0000000000280000-0x0000000000281000-memory.dmp
memory/1968-20-0x0000000000400000-0x00000000004E6000-memory.dmp
memory/2644-23-0x0000000000400000-0x000000000051E000-memory.dmp
memory/2644-25-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/1968-28-0x0000000000400000-0x00000000004E6000-memory.dmp
memory/2644-27-0x0000000000400000-0x000000000051E000-memory.dmp