Analysis Overview
SHA256
94f8d13f54940706972abc5eac4ce0c559fafa2b4c9f17ce14fe2e368ee5a203
Threat Level: Known bad
The file f1fef622821788beb88015c369117693_JaffaCakes118 was found to be: Known bad.
Malicious Activity Summary
Windows security bypass
Tofsee
Creates new service(s)
Sets service image path in registry
Modifies Windows Firewall
Deletes itself
Checks computer location settings
Executes dropped EXE
Suspicious use of SetThreadContext
Launches sc.exe
Enumerates physical storage devices
Program crash
Unsigned PE
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-15 21:46
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-15 21:46
Reported
2024-04-15 21:48
Platform
win10v2004-20240226-en
Max time kernel
144s
Max time network
155s
Command Line
Signatures
Tofsee
Creates new service(s)
Modifies Windows Firewall
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\netsh.exe | N/A |
Sets service image path in registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\okwunlp\ImagePath = "C:\\Windows\\SysWOW64\\okwunlp\\iyexygwf.exe" | C:\Windows\SysWOW64\svchost.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\f1fef622821788beb88015c369117693_JaffaCakes118.exe | N/A |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\svchost.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\okwunlp\iyexygwf.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 1380 set thread context of 4624 | N/A | C:\Windows\SysWOW64\okwunlp\iyexygwf.exe | C:\Windows\SysWOW64\svchost.exe |
Launches sc.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\sc.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\sc.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\sc.exe | N/A |
Enumerates physical storage devices
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Users\Admin\AppData\Local\Temp\f1fef622821788beb88015c369117693_JaffaCakes118.exe |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Windows\SysWOW64\okwunlp\iyexygwf.exe |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\f1fef622821788beb88015c369117693_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f1fef622821788beb88015c369117693_JaffaCakes118.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\okwunlp\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\iyexygwf.exe" C:\Windows\SysWOW64\okwunlp\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create okwunlp binPath= "C:\Windows\SysWOW64\okwunlp\iyexygwf.exe /d\"C:\Users\Admin\AppData\Local\Temp\f1fef622821788beb88015c369117693_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description okwunlp "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start okwunlp
C:\Windows\SysWOW64\okwunlp\iyexygwf.exe
C:\Windows\SysWOW64\okwunlp\iyexygwf.exe /d"C:\Users\Admin\AppData\Local\Temp\f1fef622821788beb88015c369117693_JaffaCakes118.exe"
C:\Windows\SysWOW64\netsh.exe
"C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4820 -ip 4820
C:\Windows\SysWOW64\svchost.exe
svchost.exe
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 1380 -ip 1380
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4820 -s 1040
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1380 -s 532
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=4748 --field-trial-handle=2328,i,5873823382323802923,13134441441264702821,262144 --variations-seed-version /prefetch:8
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 149.220.183.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 68.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | microsoft.com | udp |
| US | 20.112.250.133:80 | microsoft.com | tcp |
| US | 8.8.8.8:53 | microsoft.com | udp |
| US | 8.8.8.8:53 | microsoft-com.mail.protection.outlook.com | udp |
| US | 52.101.40.26:25 | microsoft-com.mail.protection.outlook.com | tcp |
| US | 8.8.8.8:53 | 133.250.112.20.in-addr.arpa | udp |
| HK | 43.231.4.7:443 | tcp | |
| US | 8.8.8.8:53 | 58.55.71.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 103.169.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 21.121.18.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | yahoo.com | udp |
| US | 8.8.8.8:53 | mta6.am0.yahoodns.net | udp |
| US | 67.195.204.74:25 | mta6.am0.yahoodns.net | tcp |
| US | 13.107.253.64:443 | tcp | |
| 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 | 216.239.32.29:80 | pki.goog | tcp |
| US | 8.8.8.8:53 | 10.169.217.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 29.32.239.216.in-addr.arpa | udp |
| US | 8.8.8.8:53 | google.com | udp |
| US | 8.8.8.8:53 | smtp.google.com | udp |
| NL | 74.125.143.26:25 | smtp.google.com | tcp |
| HK | 43.231.4.7:443 | tcp | |
| US | 8.8.8.8:53 | mail.ru | udp |
| US | 8.8.8.8:53 | mxs.mail.ru | udp |
| RU | 217.69.139.150:25 | mxs.mail.ru | tcp |
| HK | 43.231.4.7:443 | tcp | |
| US | 8.8.8.8:53 | 92.16.208.104.in-addr.arpa | udp |
Files
memory/4820-1-0x00000000007E0000-0x00000000008E0000-memory.dmp
memory/4820-2-0x0000000000720000-0x0000000000733000-memory.dmp
memory/4820-3-0x0000000000400000-0x0000000000474000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\iyexygwf.exe
| MD5 | 7999724f9cabf26ce465e14e1bf9d4c4 |
| SHA1 | b5a14d806b0e4586ffdfbad02a53dfc9e30bdd17 |
| SHA256 | 862a650390de3ec7f8634d38021ba19b55e06eaef6a0a2ff722e56c43d2fc26b |
| SHA512 | b4ea5387e1e3eb4780252c06fabf680ac2d85c01509ce81f8dacedaad7e922a633ba04964e1fb77fba8026463c811ead0cab4b944f4e36d40ae82430bc2f1e49 |
memory/1380-8-0x0000000000800000-0x0000000000900000-memory.dmp
memory/1380-9-0x0000000000D60000-0x0000000000D73000-memory.dmp
memory/1380-10-0x0000000000400000-0x0000000000474000-memory.dmp
memory/4820-11-0x0000000000400000-0x0000000000474000-memory.dmp
memory/4624-12-0x00000000012F0000-0x0000000001305000-memory.dmp
memory/4624-15-0x00000000012F0000-0x0000000001305000-memory.dmp
memory/1380-16-0x0000000000400000-0x0000000000474000-memory.dmp
memory/4624-18-0x00000000012F0000-0x0000000001305000-memory.dmp
memory/4624-19-0x00000000012F0000-0x0000000001305000-memory.dmp
memory/4624-20-0x00000000012F0000-0x0000000001305000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2024-04-15 21:46
Reported
2024-04-15 21:48
Platform
win7-20240221-en
Max time kernel
146s
Max time network
123s
Command Line
Signatures
Tofsee
Windows security bypass
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\rbmuyczf = "0" | C:\Windows\SysWOW64\svchost.exe | N/A |
Creates new service(s)
Modifies Windows Firewall
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\netsh.exe | N/A |
Sets service image path in registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\rbmuyczf\ImagePath = "C:\\Windows\\SysWOW64\\rbmuyczf\\baminxhu.exe" | C:\Windows\SysWOW64\svchost.exe | N/A |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\svchost.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\rbmuyczf\baminxhu.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2468 set thread context of 3052 | N/A | C:\Windows\SysWOW64\rbmuyczf\baminxhu.exe | C:\Windows\SysWOW64\svchost.exe |
Launches sc.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\sc.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\sc.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\sc.exe | N/A |
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\f1fef622821788beb88015c369117693_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f1fef622821788beb88015c369117693_JaffaCakes118.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rbmuyczf\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\baminxhu.exe" C:\Windows\SysWOW64\rbmuyczf\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create rbmuyczf binPath= "C:\Windows\SysWOW64\rbmuyczf\baminxhu.exe /d\"C:\Users\Admin\AppData\Local\Temp\f1fef622821788beb88015c369117693_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description rbmuyczf "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start rbmuyczf
C:\Windows\SysWOW64\netsh.exe
"C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
C:\Windows\SysWOW64\rbmuyczf\baminxhu.exe
C:\Windows\SysWOW64\rbmuyczf\baminxhu.exe /d"C:\Users\Admin\AppData\Local\Temp\f1fef622821788beb88015c369117693_JaffaCakes118.exe"
C:\Windows\SysWOW64\svchost.exe
svchost.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | microsoft.com | udp |
| US | 20.112.250.133:80 | microsoft.com | tcp |
| US | 8.8.8.8:53 | microsoft.com | udp |
| US | 8.8.8.8:53 | microsoft-com.mail.protection.outlook.com | udp |
| US | 104.47.54.36:25 | microsoft-com.mail.protection.outlook.com | tcp |
| HK | 43.231.4.7:443 | tcp | |
| US | 8.8.8.8:53 | yahoo.com | udp |
| US | 8.8.8.8:53 | mta6.am0.yahoodns.net | udp |
| US | 98.136.96.75:25 | mta6.am0.yahoodns.net | tcp |
| US | 8.8.8.8:53 | google.com | udp |
| US | 8.8.8.8:53 | smtp.google.com | udp |
| NL | 74.125.143.27:25 | smtp.google.com | tcp |
| HK | 43.231.4.7:443 | tcp | |
| US | 8.8.8.8:53 | mail.ru | udp |
| US | 8.8.8.8:53 | mxs.mail.ru | udp |
| RU | 94.100.180.31:25 | mxs.mail.ru | tcp |
| HK | 43.231.4.7:443 | tcp |
Files
memory/3036-1-0x00000000005E0000-0x00000000006E0000-memory.dmp
memory/3036-2-0x0000000000220000-0x0000000000233000-memory.dmp
memory/3036-3-0x0000000000400000-0x0000000000474000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\baminxhu.exe
| MD5 | 6012175c55ad0f4387fa16915b346de4 |
| SHA1 | e6292c2b01f71b2082e7ef57fad79ab28a42df3a |
| SHA256 | 826945d8396b62b3e20926b50dc5f2931bdf8cda1fca6e75f56f954de61873ad |
| SHA512 | c10db0199beeb88377cd112d674198a1bcb7b071903e90b3ba56b15e470ae5680ee634f9942c1444f116aee351f7c4369a883631dac0c2bae275fe69ee96abee |
memory/3036-6-0x0000000000400000-0x0000000000474000-memory.dmp
memory/3036-7-0x0000000000220000-0x0000000000233000-memory.dmp
memory/2468-11-0x0000000000400000-0x0000000000474000-memory.dmp
memory/3052-15-0x0000000000080000-0x0000000000095000-memory.dmp
memory/2468-16-0x0000000000400000-0x0000000000474000-memory.dmp
memory/3052-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/3052-20-0x0000000000080000-0x0000000000095000-memory.dmp
memory/3052-19-0x0000000000080000-0x0000000000095000-memory.dmp
memory/3052-12-0x0000000000080000-0x0000000000095000-memory.dmp
memory/2468-10-0x0000000000600000-0x0000000000700000-memory.dmp
memory/3052-21-0x0000000000080000-0x0000000000095000-memory.dmp
memory/3052-22-0x0000000000080000-0x0000000000095000-memory.dmp