0aa88c39756a4090ec8cae8ac59cc96509942fdbe007bda832d0f8da947592b0

General

Target

d4b803bf032549fc599e7eb7248d2bcc_JaffaCakes118.exe
Size

58KB
MD5

d4b803bf032549fc599e7eb7248d2bcc
SHA1

e4bc564e0cddc5e0d43e7e57fbb833f3df1583ef
SHA256

0aa88c39756a4090ec8cae8ac59cc96509942fdbe007bda832d0f8da947592b0
SHA512

5f002cab87e221892623ee0add922777e48b572c87f531f896262bb48666f0e3f255457965ddaad749ddf6b046367fd3153047df663e84c6b2763b374321b319
SSDEEP

1536:5bq7694nkwkcxkD8E78/P4Ut8uwSLxMa+zRM7j5L5DBVByc:RY6ykwkcuwEwH/+mKpujd5Dvwc

Score

7^/10

adware discovery stealer upx

Malware Config

Signatures

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	d4b803bf032549fc599e7eb7248d2bcc_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
6084	wmiprwsu.exe

Executes dropped EXE 1 IoCs

pid	Process
6084	wmiprwsu.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4572-0-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral2/files/0x000900000002360b-5.dat	upx
behavioral2/memory/4572-9-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral2/memory/6084-19-0x0000000000400000-0x0000000000423000-memory.dmp	upx

Installs/modifies Browser Helper Object 2 TTPs 1 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\{0000DE80-AEC3-70C3-4176-CE509063E000}	wmiprwsu.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\mscorews.dll	wmiprwsu.exe
File created	C:\Windows\SysWOW64\dcstream.dll	wmiprwsu.exe
File created	C:\Windows\SysWOW64\nvquetys.dll	wmiprwsu.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 2 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	d4b803bf032549fc599e7eb7248d2bcc_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wmiprwsu.exe

Modifies registry class 11 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{0000DE80-AEC3-70C3-4176-CE509063E000}\TypeLib	wmiprwsu.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{0000DE80-AEC3-70C3-4176-CE509063E000}\TypeLib\ = "{5F226421-415D-408D-9A09-0DCD94E25B48}"	wmiprwsu.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{0000DE80-AEC3-70C3-4176-CE509063E000}\VersionIndependentProgID	wmiprwsu.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{0000DE80-AEC3-70C3-4176-CE509063E000}	wmiprwsu.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{0000DE80-AEC3-70C3-4176-CE509063E000}\InprocServer32\ = "C:\\Windows\\SysWow64\\mscorews.dll"	wmiprwsu.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{0000DE80-AEC3-70C3-4176-CE509063E000}\InprocServer32\ThreadingModel = "Apartment"	wmiprwsu.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{0000DE80-AEC3-70C3-4176-CE509063E000}\ProgID\ = "Shell SearchEngineObject.SearchEngineObjectControl.1"	wmiprwsu.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{0000DE80-AEC3-70C3-4176-CE509063E000}\VersionIndependentProgID\ = "Shell SearchEngineObject.SearchEngineObjectControl"	wmiprwsu.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{0000DE80-AEC3-70C3-4176-CE509063E000}\ = "Shell Search Engine and Control Microsoft"	wmiprwsu.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{0000DE80-AEC3-70C3-4176-CE509063E000}\InprocServer32	wmiprwsu.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{0000DE80-AEC3-70C3-4176-CE509063E000}\ProgID	wmiprwsu.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4572 wrote to memory of 6084	4572	d4b803bf032549fc599e7eb7248d2bcc_JaffaCakes118.exe	91
PID 4572 wrote to memory of 6084	4572	d4b803bf032549fc599e7eb7248d2bcc_JaffaCakes118.exe	91
PID 4572 wrote to memory of 6084	4572	d4b803bf032549fc599e7eb7248d2bcc_JaffaCakes118.exe	91

C:\Users\Admin\AppData\Local\Temp\d4b803bf032549fc599e7eb7248d2bcc_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\d4b803bf032549fc599e7eb7248d2bcc_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4572
- C:\Users\Admin\AppData\Local\Temp\wmiprwsu.exe
  "C:\Users\Admin\AppData\Local\Temp\wmiprwsu.exe" C:\Users\Admin\AppData\Local\Temp\d4b803bf032549fc599e7eb7248d2bcc_JaffaCakes118.exe
  2⤵
  - Deletes itself
  - Executes dropped EXE
  - Installs/modifies Browser Helper Object
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  PID:6084

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 --field-trial-handle=4768,i,2904906934812054273,11716976550456127484,262144 --variations-seed-version --mojo-platform-channel-handle=948 /prefetch:8
1⤵
PID:2028

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Browser Extensions

1

T1176

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\wmiprwsu.exe

Filesize
58KB

MD5
d4b803bf032549fc599e7eb7248d2bcc

SHA1
e4bc564e0cddc5e0d43e7e57fbb833f3df1583ef

SHA256
0aa88c39756a4090ec8cae8ac59cc96509942fdbe007bda832d0f8da947592b0

SHA512
5f002cab87e221892623ee0add922777e48b572c87f531f896262bb48666f0e3f255457965ddaad749ddf6b046367fd3153047df663e84c6b2763b374321b319

Download Submit
memory/4572-0-0x0000000000400000-0x0000000000423000-memory.dmp

Filesize
140KB

Download
memory/4572-9-0x0000000000400000-0x0000000000423000-memory.dmp

Filesize
140KB

Download
memory/6084-19-0x0000000000400000-0x0000000000423000-memory.dmp

Filesize
140KB

Download

Analysis

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