0c4a85431263ae8c6e92df33ad45505af6201ee32a23d71b331b72701ff15144

Analysis

max time kernel
95s
max time network
114s
platform
windows10-2004_x64
resource
win10v2004-20240730-en
resource tags

arch:x64arch:x86image:win10v2004-20240730-enlocale:en-usos:windows10-2004-x64system
submitted
01/08/2024, 21:11

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General

Target

81c5844d084530bc41aac73b0c65b89f_JaffaCakes118.exe
Size

159KB
MD5

81c5844d084530bc41aac73b0c65b89f
SHA1

62e02641aac12077ddc90795df04f260fe9f082c
SHA256

0c4a85431263ae8c6e92df33ad45505af6201ee32a23d71b331b72701ff15144
SHA512

c7e830f2a18fc64172e15f361077e29ac59fa380c3c3690593e3ea9d3cee8e4d4dbb75b67d80acf3e31ce49d1e7d8d2b4f96d7189e928486204d36027b96f599
SSDEEP

3072:zNyah0mJdiUJmMPPSsE51eKFWBnj7aboWB4QuJNIssdMg:zwlQmMPW8Bj7abVB49PIPGg

Score

7^/10

adware discovery persistence stealer

Malware Config

Signatures

Loads dropped DLL 5 IoCs

pid	Process
4196	81c5844d084530bc41aac73b0c65b89f_JaffaCakes118.exe
4196	81c5844d084530bc41aac73b0c65b89f_JaffaCakes118.exe
4196	81c5844d084530bc41aac73b0c65b89f_JaffaCakes118.exe
4196	81c5844d084530bc41aac73b0c65b89f_JaffaCakes118.exe
392	rundll32.exe

Adds Run key to start application 2 TTPs 2 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\glrmmetugyzcsyrz = "C:\\Windows\\System32\\Rundll32.exe \"C:\\Windows\\system32\\rjstrfczcw.dll\" EntryPoint"	81c5844d084530bc41aac73b0c65b89f_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\glrmmetugyzcsyrz = "C:\\Windows\\System32\\Rundll32.exe \"C:\\Windows\\system32\\rjstrfczcw.dll\" EntryPoint"	rundll32.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Installs/modifies Browser Helper Object 2 TTPs 2 IoCs

BHOs are DLL modules which act as plugins for Internet Explorer.

stealer adware

Modify Registry

T1112

Browser Extensions

T1176

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{b9c571b8-4fc5-47bd-ad04-4fb830758358}	81c5844d084530bc41aac73b0c65b89f_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{b9c571b8-4fc5-47bd-ad04-4fb830758358}\NoExplorer = "\"\""	81c5844d084530bc41aac73b0c65b89f_JaffaCakes118.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\rjstrfczcw.dll	81c5844d084530bc41aac73b0c65b89f_JaffaCakes118.exe
File created	C:\Windows\SysWOW64\nnwfbybiybwfn.exe	81c5844d084530bc41aac73b0c65b89f_JaffaCakes118.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	81c5844d084530bc41aac73b0c65b89f_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ielowutil.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	IEXPLORE.EXE

Modifies Internet Explorer settings 1 TTPs 40 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "2258607264"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31122519"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\Software\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\GPU\AdapterInfo = "vendorId=\"0x10de\",deviceID=\"0x8c\",subSysID=\"0x0\",revision=\"0x0\",version=\"10.0.19041.546\"hypervisor=\"No Hypervisor (No SLAT)\""	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "2260326574"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NTPFirstRun = "1"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{B23D3869-504A-11EF-BFF5-F2FC14A9ADCF} = "0"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "429311696"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLHighDateTime = "50"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31122519"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\Software\Microsoft\Internet Explorer\GPU	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "2258607264"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\MINIE\TabBandWidth = "500"	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb01000000e9810a60a104a843a546fba0331c1bf100000000020000000000106600000001000020000000060c647c44fd0aaf083b082e92ef3c86c3227bed4a51bc25e4e13583d1ae2dad000000000e8000000002000020000000ce3d22c0b7be62acb034d375ff5f668d1eaba62a2b2a8dafef2e643cda16542220000000497d2691814c2a8465e2670224c22fe4b04c6f2140f5a521483a1df5b45889c1400000001f0de0f1b0bb315fb5b94eafe4c37b993e2057c405d7b33019c126f402fdc40fb0b64f8c02a4283a1587923ff660a4ce1c73298923aed7fae6babd08be758f00	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\Software\Microsoft\Internet Explorer\VersionManager	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "2260326574"	IEXPLORE.EXE
Set value (data)	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = 8080788757e4da01	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "31122519"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLLowDateTime = "1251635200"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "31122519"	IEXPLORE.EXE
Set value (data)	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb01000000e9810a60a104a843a546fba0331c1bf10000000002000000000010660000000100002000000073e9111c004674e0c640f7f45c95b5ef915c17f6be7a7d5808f4a608ea59fccd000000000e80000000020000200000004e8f49224ed40deb337c2565ca061f2088dc57277abd83809455ed909b81074d200000002ba812ed2e1dda8ffe87c5ea78f86196991ee05109b6187ef142f8e74e327608400000003aab517f3564ca467714b13e2ef8223ddc27a7e29c3dc2565f28991b6f38fded7bb77bc340548cc2e0458d06676259a3da2908758a17be84b65c857a3df7e88f	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = 90c5738757e4da01	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\Software\Microsoft\Internet Explorer\MINIE	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3774859476-2260090144-3466365324-1000\Software\Microsoft\Internet Explorer\VersionManager	iexplore.exe

Modifies registry class 5 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{b9c571b8-4fc5-47bd-ad04-4fb830758358}\ = "bannerstyles15 browser enhancer"	81c5844d084530bc41aac73b0c65b89f_JaffaCakes118.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{b9c571b8-4fc5-47bd-ad04-4fb830758358}\InProcServer32	81c5844d084530bc41aac73b0c65b89f_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{b9c571b8-4fc5-47bd-ad04-4fb830758358}\InProcServer32\ = "C:\\Windows\\SysWow64\\rjstrfczcw.dll"	81c5844d084530bc41aac73b0c65b89f_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{b9c571b8-4fc5-47bd-ad04-4fb830758358}\InProcServer32\ThreadingModel = "Apartment"	81c5844d084530bc41aac73b0c65b89f_JaffaCakes118.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{b9c571b8-4fc5-47bd-ad04-4fb830758358}	81c5844d084530bc41aac73b0c65b89f_JaffaCakes118.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4496	iexplore.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
4496	iexplore.exe
4496	iexplore.exe
1084	IEXPLORE.EXE
1084	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4196 wrote to memory of 392	4196	81c5844d084530bc41aac73b0c65b89f_JaffaCakes118.exe	86
PID 4196 wrote to memory of 392	4196	81c5844d084530bc41aac73b0c65b89f_JaffaCakes118.exe	86
PID 4196 wrote to memory of 392	4196	81c5844d084530bc41aac73b0c65b89f_JaffaCakes118.exe	86
PID 4496 wrote to memory of 1084	4496	iexplore.exe	89
PID 4496 wrote to memory of 1084	4496	iexplore.exe	89
PID 4496 wrote to memory of 1084	4496	iexplore.exe	89

C:\Users\Admin\AppData\Local\Temp\81c5844d084530bc41aac73b0c65b89f_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\81c5844d084530bc41aac73b0c65b89f_JaffaCakes118.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Installs/modifies Browser Helper Object
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4196
- C:\Windows\SysWOW64\rundll32.exe
  "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\rjstrfczcw.dll" EntryPoint
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  PID:392

C:\Program Files (x86)\Internet Explorer\ielowutil.exe
"C:\Program Files (x86)\Internet Explorer\ielowutil.exe" -CLSID:{0002DF01-0000-0000-C000-000000000046} -Embedding
1⤵
- System Location Discovery: System Language Discovery
PID:3052

C:\Program Files\Internet Explorer\iexplore.exe
"C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
1⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4496
- C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
  "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:4496 CREDAT:17410 /prefetch:2
  2⤵
  - System Location Discovery: System Language Discovery
  - Modifies Internet Explorer settings
  - Suspicious use of SetWindowsHookEx
  PID:1084

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

Browser Extensions

T1176

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\VersionManager\ver56A.tmp

Filesize
15KB

MD5
1a545d0052b581fbb2ab4c52133846bc

SHA1
62f3266a9b9925cd6d98658b92adec673cbe3dd3

SHA256
557472aeaebf4c1c800b9df14c190f66d62cbabb011300dbedde2dcddd27a6c1

SHA512
bd326d111589d87cd6d019378ec725ac9ac7ad4c36f22453941f7d52f90b747ede4783a83dfff6cae1b3bb46690ad49cffa77f2afda019b22863ac485b406e8d

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\LP42WWJI\suggestions[1].en-US

Filesize
17KB

MD5
5a34cb996293fde2cb7a4ac89587393a

SHA1
3c96c993500690d1a77873cd62bc639b3a10653f

SHA256
c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad

SHA512
e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsz84A3.tmp\NSISdl.dll

Filesize
14KB

MD5
2a2af69379ed269c61893e8146e18f52

SHA1
03264b45960d3f1fde4b031db47ab7a3f863713d

SHA256
e323b74c36dc52c2a3fbda49d998744cf64cab102f0d72796472ab55d2c784d4

SHA512
49388047397e33f1ed502bd0c5e61b98b33881f794fb52ca229db5b589af9ecb370e9043e2143dcb62cd9d00df6cacc89589734c83f9fda0ceb3f216c0bedeab

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsz84A3.tmp\System.dll

Filesize
10KB

MD5
82f7926fd7d12e3eb8ed7b5232bcf956

SHA1
6065fc921b742cc86c77ce2533fc1d17359eb45e

SHA256
604b5e75f43ffae8f172018cdd8f136392d9c52ae0c100d27ef537bb2dfb3984

SHA512
b31a63ebbda8f147c32d8336c5ecde8c5261ad5526b01926d7cd74b7a9a1348da56e180e53d20e1e300daca76f9511f24d6e695550b705b7650c239e5b6e76c7

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

Filesize
164KB

MD5
22c0ab59ddae9b1bb9a905ecf5f16021

SHA1
3e976a5abccb34372633b8d6427dd45a09395718

SHA256
15d4993534c019859c56589d11d3328ef731d94e566798d98322ddd5538115d9

SHA512
c4d075a748bda7e5f7b20c7a28db040f3400f5bbd4073102ad879f36c9cd9d11ffe05ee3fb11171e6a556b1a9e9d8a1621ad23804c8508dde54ff8bf5131cb0e

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads