17bca6c3b5a25ab64324ece1af18ba4e8e7a7fb75d4a552577872818120f07f3

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
04/02/2024, 22:50

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General

Target
905d896ebd1a7f5f789dcda14864f99c.dll
Size 96KB
Sample240204-2se22acfd4
SHA256 17bca6c3b5a25ab64324ece1af18ba4e8e7a7fb75d4a552577872818120f07f3
MD5 905d896ebd1a7f5f789dcda14864f99c
SHA1 d339393f4b5b22c749a528a7e71c875abb416988
SHA512 d585cd099bbafeb183094cd08a41cc24b9bfdc56fd22e737239bea10532bd92ac96e86ee3597537e87411ec8045de25bb6e66079c1a685b4797f9dc22750f2d1
SSDEEP 1536:PpWKU9/QNUb5Z5K/6UKQxbcyPM/SJha7Dr+e4Lwo3g9uWbI:PpWV9/QNqJExrPMqJha7f+Nwo5
MD5 SHA1 SHA512 SSDEEP

Score

6^/10

adware persistence stealer

Malware Config

Signatures

Adds Run key to start application 2 TTPs 1 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\rolcrsfq = "regsvr32 /u \"C:\\ProgramData\\rolcrsfq.dll\""	regsvr32.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\{79dd7f88-1dd2-11b2-aaf8-d4a5eb32ae02}	regsvr32.exe

Modifies registry class 7 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{79dd7f88-1dd2-11b2-aaf8-d4a5eb32ae02}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{79dd7f88-1dd2-11b2-aaf8-d4a5eb32ae02}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\905d896ebd1a7f5f789dcda14864f99c.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{79dd7f88-1dd2-11b2-aaf8-d4a5eb32ae02}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{79dd7f88-1dd2-11b2-aaf8-d4a5eb32ae02}\InprocServer32\t = "1707087030"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{79dd7f88-1dd2-11b2-aaf8-d4a5eb32ae02}\InprocServer32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 3028 wrote to memory of 752	3028	regsvr32.exe	28
PID 3028 wrote to memory of 752	3028	regsvr32.exe	28
PID 3028 wrote to memory of 752	3028	regsvr32.exe	28
PID 3028 wrote to memory of 752	3028	regsvr32.exe	28
PID 3028 wrote to memory of 752	3028	regsvr32.exe	28
PID 3028 wrote to memory of 752	3028	regsvr32.exe	28
PID 3028 wrote to memory of 752	3028	regsvr32.exe	28

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\905d896ebd1a7f5f789dcda14864f99c.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:3028
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\905d896ebd1a7f5f789dcda14864f99c.dll
  2⤵
  - Adds Run key to start application
  - Installs/modifies Browser Helper Object
  - Modifies registry class
  PID:752

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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