6c8e8ba9cad3f96aeb6add6a6e269f9a50434bb9a55c0ec64b559c2dbb1da24c

Analysis

max time kernel
120s
max time network
120s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
26/12/2023, 07:08

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General

Target

5b8d865aff0cf1ec17a62dea3eb254e5.exe
Size

270KB
MD5

5b8d865aff0cf1ec17a62dea3eb254e5
SHA1

141f27590bc3daee10de594466622249a7730746
SHA256

6c8e8ba9cad3f96aeb6add6a6e269f9a50434bb9a55c0ec64b559c2dbb1da24c
SHA512

19eba9ed70f3f4375407a256aaf715a56688f0b6cdbfa24681b09345f45aed6629a3ee231bf27f0c88bab89c2bc2dd05e231e7876687d9a4a828c5d8a52deafb
SSDEEP

3072:ep+iCYEphBVgcPvn6RpGlgsr5/0u1cSGo2cbvlvSsoT8LmjcV+lDFWCUwmsMNDeD:FiwvX66lf5jCoBvosUbYsMND/WG7Av9

Score

7^/10

adware evasion stealer trojan

Malware Config

Signatures

Loads dropped DLL 1 IoCs

pid	Process
896	regsvr32.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	5b8d865aff0cf1ec17a62dea3eb254e5.exe

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\{55431DD1-8795-4AF3-8FA0-D645DF7910D4}	regsvr32.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\werwea.dll	5b8d865aff0cf1ec17a62dea3eb254e5.exe
File created	C:\Windows\SysWOW64\werwea.exe	5b8d865aff0cf1ec17a62dea3eb254e5.exe

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

System Information Discovery
T1082

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{55431DD1-8795-4AF3-8FA0-D645DF7910D4}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{55431DD1-8795-4AF3-8FA0-D645DF7910D4}\	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{55431DD1-8795-4AF3-8FA0-D645DF7910D4}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{55431DD1-8795-4AF3-8FA0-D645DF7910D4}\InprocServer32\ = "C:\\Windows\\SysWow64\\werwea.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{55431DD1-8795-4AF3-8FA0-D645DF7910D4}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2304	5b8d865aff0cf1ec17a62dea3eb254e5.exe
2304	5b8d865aff0cf1ec17a62dea3eb254e5.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2304 wrote to memory of 896	2304	5b8d865aff0cf1ec17a62dea3eb254e5.exe	28
PID 2304 wrote to memory of 896	2304	5b8d865aff0cf1ec17a62dea3eb254e5.exe	28
PID 2304 wrote to memory of 896	2304	5b8d865aff0cf1ec17a62dea3eb254e5.exe	28
PID 2304 wrote to memory of 896	2304	5b8d865aff0cf1ec17a62dea3eb254e5.exe	28
PID 2304 wrote to memory of 896	2304	5b8d865aff0cf1ec17a62dea3eb254e5.exe	28
PID 2304 wrote to memory of 896	2304	5b8d865aff0cf1ec17a62dea3eb254e5.exe	28
PID 2304 wrote to memory of 896	2304	5b8d865aff0cf1ec17a62dea3eb254e5.exe	28

C:\Users\Admin\AppData\Local\Temp\5b8d865aff0cf1ec17a62dea3eb254e5.exe
"C:\Users\Admin\AppData\Local\Temp\5b8d865aff0cf1ec17a62dea3eb254e5.exe"
1⤵
- Checks whether UAC is enabled
- Drops file in System32 directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2304
- C:\Windows\SysWOW64\regsvr32.exe
  "C:\Windows\System32\regsvr32.exe" /s C:\Windows\system32\werwea.dll
  2⤵
  - Loads dropped DLL
  - Installs/modifies Browser Helper Object
  - Modifies registry class
  PID:896

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 Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Windows\SysWOW64\werwea.dll

Filesize
148KB

MD5
32f4c388806e0c6d76c930ca40c1413a

SHA1
960f601eae5249781220511a0b122e5b0497f32d

SHA256
17773bf9877ae5093752dcd8dc92fc19a4b58ffd31a9e354f1b0e24ca6c472d7

SHA512
0cfd5aceb5eb9ad5e6608776008f136697c738e38a9e8bed7ebc7298a9bd910495b8b9ecc49ad3a2ad8382a970511638c2725e20335488edad983b9c09640f6e

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