9a2050975d64a4555022767549de73a45570e0d492817541425c94b617a8fefc

Analysis

max time kernel
10s
max time network
120s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
06/01/2024, 10:14

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General

Target

458feaf157dc30c9aeebc7b939487648.exe
Size

3.4MB
MD5

458feaf157dc30c9aeebc7b939487648
SHA1

02ea664dae6229f391789e6d6debdc20d42deff9
SHA256

9a2050975d64a4555022767549de73a45570e0d492817541425c94b617a8fefc
SHA512

d556d490cae2471adddd5ed63a35479432cb52d0ea887335ddc673294abd1f9270e1e0e6a8d7efb5b2c4b6faca81de4093cf1294c414e5d56df95fc6cba6a5f7
SSDEEP

24576:OEtl9mRda1CKB8NIyXbacAfUSunEp+XRGEUvkXw6zezNFtcyyRvx+z94sY8x:NEs1hB8NIMI8Sfpwotkzaxc1OGz8x

Score

10^/10

persistence ransomware

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe HelpMe.exe"	HelpMe.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe HelpMe.exe"	458feaf157dc30c9aeebc7b939487648.exe

Renames multiple (91) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk	458feaf157dc30c9aeebc7b939487648.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk	HelpMe.exe

Executes dropped EXE 1 IoCs

pid	Process
2960	HelpMe.exe

Loads dropped DLL 2 IoCs

pid	Process
2392	458feaf157dc30c9aeebc7b939487648.exe
2392	458feaf157dc30c9aeebc7b939487648.exe

Enumerates connected drives 3 TTPs 46 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\Q:	458feaf157dc30c9aeebc7b939487648.exe
File opened (read-only)	\??\R:	458feaf157dc30c9aeebc7b939487648.exe
File opened (read-only)	\??\V:	458feaf157dc30c9aeebc7b939487648.exe
File opened (read-only)	\??\G:	HelpMe.exe
File opened (read-only)	\??\I:	HelpMe.exe
File opened (read-only)	\??\G:	458feaf157dc30c9aeebc7b939487648.exe
File opened (read-only)	\??\P:	458feaf157dc30c9aeebc7b939487648.exe
File opened (read-only)	\??\P:	HelpMe.exe
File opened (read-only)	\??\U:	HelpMe.exe
File opened (read-only)	\??\W:	458feaf157dc30c9aeebc7b939487648.exe
File opened (read-only)	\??\B:	HelpMe.exe
File opened (read-only)	\??\W:	HelpMe.exe
File opened (read-only)	\??\A:	458feaf157dc30c9aeebc7b939487648.exe
File opened (read-only)	\??\E:	458feaf157dc30c9aeebc7b939487648.exe
File opened (read-only)	\??\I:	458feaf157dc30c9aeebc7b939487648.exe
File opened (read-only)	\??\J:	458feaf157dc30c9aeebc7b939487648.exe
File opened (read-only)	\??\S:	458feaf157dc30c9aeebc7b939487648.exe
File opened (read-only)	\??\J:	HelpMe.exe
File opened (read-only)	\??\R:	HelpMe.exe
File opened (read-only)	\??\S:	HelpMe.exe
File opened (read-only)	\??\T:	HelpMe.exe
File opened (read-only)	\??\O:	458feaf157dc30c9aeebc7b939487648.exe
File opened (read-only)	\??\U:	458feaf157dc30c9aeebc7b939487648.exe
File opened (read-only)	\??\H:	HelpMe.exe
File opened (read-only)	\??\K:	HelpMe.exe
File opened (read-only)	\??\N:	HelpMe.exe
File opened (read-only)	\??\O:	HelpMe.exe
File opened (read-only)	\??\X:	HelpMe.exe
File opened (read-only)	\??\K:	458feaf157dc30c9aeebc7b939487648.exe
File opened (read-only)	\??\L:	458feaf157dc30c9aeebc7b939487648.exe
File opened (read-only)	\??\Z:	458feaf157dc30c9aeebc7b939487648.exe
File opened (read-only)	\??\L:	HelpMe.exe
File opened (read-only)	\??\M:	HelpMe.exe
File opened (read-only)	\??\H:	458feaf157dc30c9aeebc7b939487648.exe
File opened (read-only)	\??\N:	458feaf157dc30c9aeebc7b939487648.exe
File opened (read-only)	\??\T:	458feaf157dc30c9aeebc7b939487648.exe
File opened (read-only)	\??\Y:	458feaf157dc30c9aeebc7b939487648.exe
File opened (read-only)	\??\Y:	HelpMe.exe
File opened (read-only)	\??\Z:	HelpMe.exe
File opened (read-only)	\??\B:	458feaf157dc30c9aeebc7b939487648.exe
File opened (read-only)	\??\M:	458feaf157dc30c9aeebc7b939487648.exe
File opened (read-only)	\??\X:	458feaf157dc30c9aeebc7b939487648.exe
File opened (read-only)	\??\A:	HelpMe.exe
File opened (read-only)	\??\E:	HelpMe.exe
File opened (read-only)	\??\Q:	HelpMe.exe
File opened (read-only)	\??\V:	HelpMe.exe

Drops autorun.inf file 1 TTPs 3 IoCs

Malware can abuse Windows Autorun to spread further via attached volumes.

Replication Through Removable Media

T1091

description	ioc	Process
File opened for modification	F:\AUTORUN.INF	458feaf157dc30c9aeebc7b939487648.exe
File opened for modification	C:\AUTORUN.INF	458feaf157dc30c9aeebc7b939487648.exe
File opened for modification	F:\AUTORUN.INF	HelpMe.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\HelpMe.exe	458feaf157dc30c9aeebc7b939487648.exe
File created	C:\Windows\SysWOW64\HelpMe.exe	HelpMe.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2392 wrote to memory of 2960	2392	458feaf157dc30c9aeebc7b939487648.exe	16
PID 2392 wrote to memory of 2960	2392	458feaf157dc30c9aeebc7b939487648.exe	16
PID 2392 wrote to memory of 2960	2392	458feaf157dc30c9aeebc7b939487648.exe	16
PID 2392 wrote to memory of 2960	2392	458feaf157dc30c9aeebc7b939487648.exe	16

C:\Windows\SysWOW64\HelpMe.exe
C:\Windows\system32\HelpMe.exe
1⤵
- Modifies WinLogon for persistence
- Drops startup file
- Executes dropped EXE
- Enumerates connected drives
- Drops autorun.inf file
- Drops file in System32 directory
PID:2960

C:\Users\Admin\AppData\Local\Temp\458feaf157dc30c9aeebc7b939487648.exe
"C:\Users\Admin\AppData\Local\Temp\458feaf157dc30c9aeebc7b939487648.exe"
1⤵
- Modifies WinLogon for persistence
- Drops startup file
- Loads dropped DLL
- Enumerates connected drives
- Drops autorun.inf file
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:2392

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Replication Through Removable Media

T1091

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Replication Through Removable Media

T1091

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2392-0-0x0000000000400000-0x000000000047C000-memory.dmp

Filesize
496KB

Download
memory/2392-11-0x0000000001EC0000-0x0000000001F3C000-memory.dmp

Filesize
496KB

Download
memory/2392-4-0x0000000001EC0000-0x0000000001F3C000-memory.dmp

Filesize
496KB

Download
memory/2392-2-0x00000000001B0000-0x00000000001B1000-memory.dmp

Filesize
4KB

Download
memory/2392-232-0x0000000000400000-0x000000000047C000-memory.dmp

Filesize
496KB

Download
memory/2960-13-0x00000000003A0000-0x00000000003A1000-memory.dmp

Filesize
4KB

Download
memory/2960-12-0x0000000000400000-0x000000000047C000-memory.dmp

Filesize
496KB

Download
memory/2960-237-0x0000000000400000-0x000000000047C000-memory.dmp

Filesize
496KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads