8ae1653767fc1a34bfbbece90a9e117ede958f48ba324909d65e2aad091e4256

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
13/07/2024, 22:42

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General

Target

43a45abc947e5b9b6c8a27796558a7a2_JaffaCakes118.exe
Size

309KB
MD5

43a45abc947e5b9b6c8a27796558a7a2
SHA1

cbcfb50d0f1153797fd72d9e0e980bb14b473c9f
SHA256

8ae1653767fc1a34bfbbece90a9e117ede958f48ba324909d65e2aad091e4256
SHA512

ad804c72a7e17400905e57d6a6cada2a87f372faae2e92673b95a4096f85ac21d5d6ed9895ebeed34504ff6ec1684a406a6158b0b1fc3c2af572cf9d199dadcd
SSDEEP

6144:ipUGBphL7j4LeHM3bt+n5Wz4zuKc2AZY7hksBN0d8F:ipUGBTcy44zuKuZhv8

Score

8^/10

adware persistence stealer

Malware Config

Signatures

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\explorer\Run	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\d = "C:\\Program Files (x86)\\Internet Explorer\\ctfmonzfc.exe"	regsvr32.exe

Loads dropped DLL 1 IoCs

pid	Process
2340	regsvr32.exe

Installs/modifies Browser Helper Object 2 TTPs 3 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	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{6BCE6ACC-7888-33E6-959E-9EA3BFBD3BA9}	regsvr32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{6BCE6ACC-7888-33E6-959E-9EA3BFBD3BA9}\IExplore = "1"	regsvr32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\yu85311.dll	43a45abc947e5b9b6c8a27796558a7a2_JaffaCakes118.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Internet Explorer\ctfmonzfc.exe	regsvr32.exe

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

System Information Discovery
T1082

Modifies registry class 41 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\D.1\ = "D"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\D\ = "D"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6BCE6ACC-7888-33E6-959E-9EA3BFBD3BA9}\VersionIndependentProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{EDFE39D5-7F51-3BEE-B112-91EB92618975}\ProxyStubClsid32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EDFE39D5-7F51-3BEE-B112-91EB92618975}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\D.1	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6BCE6ACC-7888-33E6-959E-9EA3BFBD3BA9}\ = "D"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{E480D1FF-340C-3C01-B429-D46C40823361}\1.0\HELPDIR	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{E480D1FF-340C-3C01-B429-D46C40823361}\1.0\HELPDIR\ = "C:\\Windows\\SysWow64\\"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{EDFE39D5-7F51-3BEE-B112-91EB92618975}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6BCE6ACC-7888-33E6-959E-9EA3BFBD3BA9}\VersionIndependentProgID\ = "D"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6BCE6ACC-7888-33E6-959E-9EA3BFBD3BA9}\InprocServer32\ = "C:\\Windows\\SysWow64\\yu85311.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EDFE39D5-7F51-3BEE-B112-91EB92618975}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\D\CLSID\ = "{6BCE6ACC-7888-33E6-959E-9EA3BFBD3BA9}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{E480D1FF-340C-3C01-B429-D46C40823361}\1.0\FLAGS	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{EDFE39D5-7F51-3BEE-B112-91EB92618975}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{EDFE39D5-7F51-3BEE-B112-91EB92618975}\TypeLib\ = "{E480D1FF-340C-3C01-B429-D46C40823361}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EDFE39D5-7F51-3BEE-B112-91EB92618975}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{E480D1FF-340C-3C01-B429-D46C40823361}\1.0\0\win32\ = "C:\\Windows\\SysWow64\\yu85311.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{EDFE39D5-7F51-3BEE-B112-91EB92618975}\TypeLib\Version = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EDFE39D5-7F51-3BEE-B112-91EB92618975}\TypeLib\Version = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\D.1\CLSID\ = "{6BCE6ACC-7888-33E6-959E-9EA3BFBD3BA9}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6BCE6ACC-7888-33E6-959E-9EA3BFBD3BA9}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{E480D1FF-340C-3C01-B429-D46C40823361}\1.0\FLAGS\ = "0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{E480D1FF-340C-3C01-B429-D46C40823361}\1.0\0\win32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{EDFE39D5-7F51-3BEE-B112-91EB92618975}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EDFE39D5-7F51-3BEE-B112-91EB92618975}\TypeLib\ = "{E480D1FF-340C-3C01-B429-D46C40823361}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EDFE39D5-7F51-3BEE-B112-91EB92618975}\ = "IDOMYddh"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\D.1\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\D	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\D\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6BCE6ACC-7888-33E6-959E-9EA3BFBD3BA9}\ProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6BCE6ACC-7888-33E6-959E-9EA3BFBD3BA9}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{E480D1FF-340C-3C01-B429-D46C40823361}\1.0	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{EDFE39D5-7F51-3BEE-B112-91EB92618975}\ = "IDOMYddh"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6BCE6ACC-7888-33E6-959E-9EA3BFBD3BA9}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6BCE6ACC-7888-33E6-959E-9EA3BFBD3BA9}\ProgID\ = "D.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{E480D1FF-340C-3C01-B429-D46C40823361}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{E480D1FF-340C-3C01-B429-D46C40823361}\1.0\ = "LIB"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{E480D1FF-340C-3C01-B429-D46C40823361}\1.0\0	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EDFE39D5-7F51-3BEE-B112-91EB92618975}\ProxyStubClsid32	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2544 wrote to memory of 2340	2544	43a45abc947e5b9b6c8a27796558a7a2_JaffaCakes118.exe	30
PID 2544 wrote to memory of 2340	2544	43a45abc947e5b9b6c8a27796558a7a2_JaffaCakes118.exe	30
PID 2544 wrote to memory of 2340	2544	43a45abc947e5b9b6c8a27796558a7a2_JaffaCakes118.exe	30
PID 2544 wrote to memory of 2340	2544	43a45abc947e5b9b6c8a27796558a7a2_JaffaCakes118.exe	30
PID 2544 wrote to memory of 2340	2544	43a45abc947e5b9b6c8a27796558a7a2_JaffaCakes118.exe	30
PID 2544 wrote to memory of 2340	2544	43a45abc947e5b9b6c8a27796558a7a2_JaffaCakes118.exe	30
PID 2544 wrote to memory of 2340	2544	43a45abc947e5b9b6c8a27796558a7a2_JaffaCakes118.exe	30

C:\Users\Admin\AppData\Local\Temp\43a45abc947e5b9b6c8a27796558a7a2_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\43a45abc947e5b9b6c8a27796558a7a2_JaffaCakes118.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:2544
- C:\Windows\SysWOW64\regsvr32.exe
  "C:\Windows\System32\regsvr32.exe" /s C:\Windows\system32\yu85311.dll
  2⤵
  - Adds policy Run key to start application
  - Loads dropped DLL
  - Installs/modifies Browser Helper Object
  - Drops file in Program Files directory
  - Modifies registry class
  PID:2340

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\yu85311.dll

Filesize
252KB

MD5
7747a5f9ef000f8ada15e4e919225643

SHA1
6b17572ce746a4d375b57042e307141eb7da542b

SHA256
90191b995f3b44ad7be62f99cbe342834ba3ea64d8185ca989d63686d07d0af1

SHA512
ec1717dc4119f4cc0d7b268f57528528856b115f0c7f3d56a413236c38b61a0366235fd7bf25ba926236f9ab3fc9a792a0090171d2a5900c870a5b0d11de9af2

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads