0eefd9bf31d832202cde9555824b10d1aaadacfa1e35aae47c0f96a0934c480d

Analysis

max time kernel
150s
max time network
128s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
11/09/2024, 18:57

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General

Target

db0497a06459cd6ab8f0663795e521e3_JaffaCakes118.dll
Size

521KB
MD5

db0497a06459cd6ab8f0663795e521e3
SHA1

82ff840c6cb51d66362150badab46d73458d7f9b
SHA256

0eefd9bf31d832202cde9555824b10d1aaadacfa1e35aae47c0f96a0934c480d
SHA512

cff91aa19be6314bcb991d89fa7626eb1cdaea6f89c365d74552afeebad17f4a989ce7d52ebd50d591c85d717e76ed70d87329735cfa16d9dd97117c3c35947f
SSDEEP

384:VQpdNjtU2OCpn4Iiol4XmJXmYbbVED0gg1e0xykNwozMqmA/4x212:VQpdP4Ulu6VFElr0xy+Mqf4x21

Score

6^/10

adware discovery stealer

Malware Config

Signatures

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\{3490415F-65F8-B5C5-D8BA-9405FB120543}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{3490415F-65F8-B5C5-D8BA-9405FB120543}\ = "yzztcmsn.dll"	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\verclsid.exe	rundll32.exe

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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies registry class 6 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3490415F-65F8-B5C5-D8BA-9405FB120543}\InprocServer32	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3490415F-65F8-B5C5-D8BA-9405FB120543}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3490415F-65F8-B5C5-D8BA-9405FB120543}\InprocServer32\ = "C:\\Windows\\SysWow64\\yzztcmsn.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3490415F-65F8-B5C5-D8BA-9405FB120543}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2552	rundll32.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2544 wrote to memory of 2552	2544	rundll32.exe	30
PID 2544 wrote to memory of 2552	2544	rundll32.exe	30
PID 2544 wrote to memory of 2552	2544	rundll32.exe	30
PID 2544 wrote to memory of 2552	2544	rundll32.exe	30
PID 2544 wrote to memory of 2552	2544	rundll32.exe	30
PID 2544 wrote to memory of 2552	2544	rundll32.exe	30
PID 2544 wrote to memory of 2552	2544	rundll32.exe	30
PID 2552 wrote to memory of 2560	2552	rundll32.exe	31
PID 2552 wrote to memory of 2560	2552	rundll32.exe	31
PID 2552 wrote to memory of 2560	2552	rundll32.exe	31
PID 2552 wrote to memory of 2560	2552	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\db0497a06459cd6ab8f0663795e521e3_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2544
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\db0497a06459cd6ab8f0663795e521e3_JaffaCakes118.dll,#1
  2⤵
  - Installs/modifies Browser Helper Object
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2552
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c C:\Users\Admin\AppData\Local\Temp\~DFD259439334.bat
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2560

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Browser Extensions

T1176

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

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\Temp\~DFD259439334.bat

Filesize
121B

MD5
09517fc62284f33e877a276463580bd1

SHA1
0b14fe1db4493818f9de0bf2a56ee5370b8d479a

SHA256
6cc6bbb1f3f754b6894d84130f5f2d86569ac3a603e1632d3cefa028f22b6238

SHA512
1b924dd216d0f38199cc6df215e65ff260aa48fa37aa620dabcbc616f434643bd1f2e617d66b14bd52900214148741565128ba9589782ba582fd7308369f4a4d

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