7aa22ac5aa653293c6f24ce718224a607d5d9eb61cbc26a659abeefb888023dc

Analysis

max time kernel
156s
max time network
159s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
16-04-2024 19:09

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General

Target

f423acacb7e561850b95558cb3a99ef5_JaffaCakes118.exe
Size

72KB
MD5

f423acacb7e561850b95558cb3a99ef5
SHA1

78108272bf364bf752820b9c772e4f345ffe24b7
SHA256

7aa22ac5aa653293c6f24ce718224a607d5d9eb61cbc26a659abeefb888023dc
SHA512

aeb42bc635583506044327235d930f056eb8a0a74b9af813b72d02ec62625d31fe24de0c0b108fac154ac1dbf4146a76d6fcaaab0e9c11d538909183a392c1e6
SSDEEP

1536:sU6aFoUCO5xUbbJVttKJex+6OOwPEWnAB8kiIrZI2sGv:uuoTOMHJHVOPAB7trR/v

Score

7^/10

persistence upx

Malware Config

Signatures

Loads dropped DLL 2 IoCs

pid	Process
2116	f423acacb7e561850b95558cb3a99ef5_JaffaCakes118.exe
2028	rundll32.exe

UPX packed file 9 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/2116-2-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2116-3-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2116-4-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2116-13-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/2116-11-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/2116-15-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/2028-34-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/2028-35-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/2028-36-0x0000000010000000-0x0000000010014000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\MSServer = "rundll32.exe C:\\Windows\\system32\\fccaBSkl.dll,#1"	rundll32.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\vtUkhgfG.dll	f423acacb7e561850b95558cb3a99ef5_JaffaCakes118.exe
File created	C:\Windows\SysWOW64\vtUkhgfG.dll	f423acacb7e561850b95558cb3a99ef5_JaffaCakes118.exe
File created	C:\Windows\SysWOW64\fccaBSkl.dll	f423acacb7e561850b95558cb3a99ef5_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\fccaBSkl.dll	f423acacb7e561850b95558cb3a99ef5_JaffaCakes118.exe

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{09C72999-5C10-41A3-A524-24661D942003}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{09C72999-5C10-41A3-A524-24661D942003}\InprocServer32\ = "C:\\Windows\\SysWow64\\fccaBSkl.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{09C72999-5C10-41A3-A524-24661D942003}\InprocServer32\ThreadingModel = "Both"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{09C72999-5C10-41A3-A524-24661D942003}	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2116	f423acacb7e561850b95558cb3a99ef5_JaffaCakes118.exe
2116	f423acacb7e561850b95558cb3a99ef5_JaffaCakes118.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2116	f423acacb7e561850b95558cb3a99ef5_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2116	f423acacb7e561850b95558cb3a99ef5_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2116 wrote to memory of 612	2116	f423acacb7e561850b95558cb3a99ef5_JaffaCakes118.exe	5
PID 2116 wrote to memory of 2028	2116	f423acacb7e561850b95558cb3a99ef5_JaffaCakes118.exe	99
PID 2116 wrote to memory of 2028	2116	f423acacb7e561850b95558cb3a99ef5_JaffaCakes118.exe	99
PID 2116 wrote to memory of 2028	2116	f423acacb7e561850b95558cb3a99ef5_JaffaCakes118.exe	99
PID 2116 wrote to memory of 2092	2116	f423acacb7e561850b95558cb3a99ef5_JaffaCakes118.exe	100
PID 2116 wrote to memory of 2092	2116	f423acacb7e561850b95558cb3a99ef5_JaffaCakes118.exe	100
PID 2116 wrote to memory of 2092	2116	f423acacb7e561850b95558cb3a99ef5_JaffaCakes118.exe	100

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:612

C:\Users\Admin\AppData\Local\Temp\f423acacb7e561850b95558cb3a99ef5_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f423acacb7e561850b95558cb3a99ef5_JaffaCakes118.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2116
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Windows\system32\fccaBSkl.dll,a
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  PID:2028
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\removalfile.bat "C:\Users\Admin\AppData\Local\Temp\f423acacb7e561850b95558cb3a99ef5_JaffaCakes118.exe"
  2⤵
  PID:2092

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=3796 --field-trial-handle=2676,i,447940133669489189,1353734109898858672,262144 --variations-seed-version /prefetch:8
1⤵
PID:4488

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\removalfile.bat

Filesize
43B

MD5
9a7ef09167a6f4433681b94351509043

SHA1
259b1375ed8e84943ca1d42646bb416325c89e12

SHA256
d5739a0510d89da572eb0b0d394d4fb4dd361cd9ee0144b9b31c590df93c3be7

SHA512
96b84cd88a0e4b7c1122af3ed6ce5edf0a9a4e9bf79575eadfac16b2c46f1278d57755d29f21d7c6dcb4403be24b7ac7da4837c6cc9c602342a8f2b8e54883df

Download Submit
C:\Windows\SysWOW64\vtUkhgfG.dll

Filesize
43KB

MD5
b9da59d32d4e8786f73c41a214633a60

SHA1
8a905b10338c068ff5fbbc8fcad859e7c845c58d

SHA256
4c40a85131890d55aacbae6e02b2f4180dd5fc9fe8d5892b9faf0461b1e8df2f

SHA512
09cc83b50d2b55bd1366cf3ab333c7f0d7f98b4f64e6b24b0a5fcbe2f65b58132a17b4ed2e09f30d2907766f15e0b12ebe7109e02634446a85e9fdb49c051c38

Download Submit
memory/2028-36-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/2028-35-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/2028-34-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/2116-13-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/2116-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2116-12-0x0000000002B70000-0x0000000002B79000-memory.dmp

Filesize
36KB

Download
memory/2116-11-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/2116-15-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/2116-23-0x0000000002030000-0x0000000002040000-memory.dmp

Filesize
64KB

Download
memory/2116-4-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2116-3-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2116-2-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2116-1-0x0000000002030000-0x0000000002040000-memory.dmp

Filesize
64KB

Download