d4815c94c248a5c4ba48a5c47ea541f87abb206ac64957c2c3f307b7f6941931

Analysis

max time kernel
146s
max time network
127s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
19/03/2024, 03:01

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General

Target

d50b38bf894e6e0bf265a49568659c0a.exe
Size

653KB
MD5

d50b38bf894e6e0bf265a49568659c0a
SHA1

3ac36e3a94a8cbe111baf1f5f24aa365aceedf3a
SHA256

d4815c94c248a5c4ba48a5c47ea541f87abb206ac64957c2c3f307b7f6941931
SHA512

966ada31fa2332c0676777117720bab698d81114d6b4f902238fb72e2a2b8929b952f0386813e7b4903263a22708d6863685318378995cdfc80f65b0a052c61b
SSDEEP

6144:k82p4pFHfzMepymgWPnviP6Koa0nArn20l96tCF2eKNBDRlC8HQQDhy5OwbYBilv:Cp4pNfz3ymJnJ8QCFkxCaQTOl2QU866G

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"	d50b38bf894e6e0bf265a49568659c0a.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe HelpMe.exe"	HelpMe.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 3 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk	d50b38bf894e6e0bf265a49568659c0a.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk	HelpMe.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk	d50b38bf894e6e0bf265a49568659c0a.exe

Executes dropped EXE 1 IoCs

pid	Process
2020	HelpMe.exe

Loads dropped DLL 2 IoCs

pid	Process
2948	d50b38bf894e6e0bf265a49568659c0a.exe
2948	d50b38bf894e6e0bf265a49568659c0a.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)	\??\M:	d50b38bf894e6e0bf265a49568659c0a.exe
File opened (read-only)	\??\O:	d50b38bf894e6e0bf265a49568659c0a.exe
File opened (read-only)	\??\S:	d50b38bf894e6e0bf265a49568659c0a.exe
File opened (read-only)	\??\A:	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)	\??\B:	d50b38bf894e6e0bf265a49568659c0a.exe
File opened (read-only)	\??\X:	d50b38bf894e6e0bf265a49568659c0a.exe
File opened (read-only)	\??\P:	HelpMe.exe
File opened (read-only)	\??\R:	HelpMe.exe
File opened (read-only)	\??\S:	HelpMe.exe
File opened (read-only)	\??\U:	HelpMe.exe
File opened (read-only)	\??\L:	d50b38bf894e6e0bf265a49568659c0a.exe
File opened (read-only)	\??\R:	d50b38bf894e6e0bf265a49568659c0a.exe
File opened (read-only)	\??\U:	d50b38bf894e6e0bf265a49568659c0a.exe
File opened (read-only)	\??\W:	d50b38bf894e6e0bf265a49568659c0a.exe
File opened (read-only)	\??\G:	HelpMe.exe
File opened (read-only)	\??\Q:	HelpMe.exe
File opened (read-only)	\??\Y:	HelpMe.exe
File opened (read-only)	\??\Z:	HelpMe.exe
File opened (read-only)	\??\E:	d50b38bf894e6e0bf265a49568659c0a.exe
File opened (read-only)	\??\P:	d50b38bf894e6e0bf265a49568659c0a.exe
File opened (read-only)	\??\Y:	d50b38bf894e6e0bf265a49568659c0a.exe
File opened (read-only)	\??\G:	d50b38bf894e6e0bf265a49568659c0a.exe
File opened (read-only)	\??\J:	d50b38bf894e6e0bf265a49568659c0a.exe
File opened (read-only)	\??\K:	d50b38bf894e6e0bf265a49568659c0a.exe
File opened (read-only)	\??\B:	HelpMe.exe
File opened (read-only)	\??\H:	HelpMe.exe
File opened (read-only)	\??\M:	HelpMe.exe
File opened (read-only)	\??\H:	d50b38bf894e6e0bf265a49568659c0a.exe
File opened (read-only)	\??\Z:	d50b38bf894e6e0bf265a49568659c0a.exe
File opened (read-only)	\??\E:	HelpMe.exe
File opened (read-only)	\??\J:	HelpMe.exe
File opened (read-only)	\??\T:	HelpMe.exe
File opened (read-only)	\??\I:	d50b38bf894e6e0bf265a49568659c0a.exe
File opened (read-only)	\??\N:	d50b38bf894e6e0bf265a49568659c0a.exe
File opened (read-only)	\??\Q:	d50b38bf894e6e0bf265a49568659c0a.exe
File opened (read-only)	\??\T:	d50b38bf894e6e0bf265a49568659c0a.exe
File opened (read-only)	\??\V:	d50b38bf894e6e0bf265a49568659c0a.exe
File opened (read-only)	\??\L:	HelpMe.exe
File opened (read-only)	\??\V:	HelpMe.exe
File opened (read-only)	\??\X:	HelpMe.exe
File opened (read-only)	\??\A:	d50b38bf894e6e0bf265a49568659c0a.exe
File opened (read-only)	\??\W:	HelpMe.exe
File opened (read-only)	\??\I:	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	d50b38bf894e6e0bf265a49568659c0a.exe
File opened for modification	C:\AUTORUN.INF	d50b38bf894e6e0bf265a49568659c0a.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	d50b38bf894e6e0bf265a49568659c0a.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 2948 wrote to memory of 2020	2948	d50b38bf894e6e0bf265a49568659c0a.exe	28
PID 2948 wrote to memory of 2020	2948	d50b38bf894e6e0bf265a49568659c0a.exe	28
PID 2948 wrote to memory of 2020	2948	d50b38bf894e6e0bf265a49568659c0a.exe	28
PID 2948 wrote to memory of 2020	2948	d50b38bf894e6e0bf265a49568659c0a.exe	28

C:\Users\Admin\AppData\Local\Temp\d50b38bf894e6e0bf265a49568659c0a.exe
"C:\Users\Admin\AppData\Local\Temp\d50b38bf894e6e0bf265a49568659c0a.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:2948
- C:\Windows\SysWOW64\HelpMe.exe
  C:\Windows\system32\HelpMe.exe
  2⤵
  - Modifies WinLogon for persistence
  - Drops startup file
  - Executes dropped EXE
  - Enumerates connected drives
  - Drops autorun.inf file
  - Drops file in System32 directory
  PID:2020

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

C:\$Recycle.Bin\S-1-5-21-1650401615-1019878084-3673944445-1000\desktop.ini.exe

Filesize
654KB

MD5
d9424ba3eb83dc79c8dfc05fcc536b64

SHA1
3448e2203c71edd8bd140304ecc1d5641e5ff023

SHA256
52fd5e94f18a0592e76fed6d8435dc65dc033ba34f0319a9ba4af8ac3ec0f19a

SHA512
2cf868316fe87eb853be201738dbf0f0f3ff743d9a83a041424ce48be86c4063de1e7bedba3d8c5558d35a25e19278bf2a271b3f64e69efa922ce92d9a7f1fdb

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

Filesize
1KB

MD5
0a0885c8419d1b693d4d9f3f71b1b4f8

SHA1
c3d25003559ce44fb9144cf0458256446531f138

SHA256
b16bca93c12396b7700a75fcab5ceb42e966d2dce1a235ce17ccdd72cd27060c

SHA512
11833cd97cd5be7b8ff372dd7d322a65773bc48210d8837795075568fb8c8cb8f07492bfa515f7b4b05cf23b558afbe4eb7726e3361db5f5ba64a44fc5e4cc21

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

Filesize
954B

MD5
702bf81925eb84c4256f31546628d446

SHA1
837db2410de93dd04662d42f60e87e11ed20c474

SHA256
8198d552c515232f56d96105614a5d2553230ff4a3ce32ba762217e98fc18228

SHA512
6169fe8bf4e62ba260f4fea81077ce2e9c217a77f2258dfef9c204a0cae1262c5d3f196a06de96ec9f07291505a569ddf0aa7bb88231a9f964127786472e7025

Download Submit
F:\AUTORUN.INF

Filesize
145B

MD5
ca13857b2fd3895a39f09d9dde3cca97

SHA1
8b78c5b2ec97c372ebdcef92d14b0998f8dd6dd0

SHA256
cfe448b4506a95b33b529efa88f1ac704d8bdf98a941c065650ead27609318ae

SHA512
55e5b5325968d1e5314527fb2d26012f5aae4a1c38e305417be273400cb1c6d0c22b85bddb501d7a5720a3f53bb5caf6ada8a7894232344c4f6c6ef85d226b47

Download Submit
F:\AutoRun.exe

Filesize
653KB

MD5
d50b38bf894e6e0bf265a49568659c0a

SHA1
3ac36e3a94a8cbe111baf1f5f24aa365aceedf3a

SHA256
d4815c94c248a5c4ba48a5c47ea541f87abb206ac64957c2c3f307b7f6941931

SHA512
966ada31fa2332c0676777117720bab698d81114d6b4f902238fb72e2a2b8929b952f0386813e7b4903263a22708d6863685318378995cdfc80f65b0a052c61b

Download Submit
\Windows\SysWOW64\HelpMe.exe

Filesize
652KB

MD5
bdce3a3cfe5c247f68320897bc64f043

SHA1
9375561d298fcf477a665da982305219f1369606

SHA256
b632013f4b59a832f0164220194a446fb278fb11e25f1b5874b246b17a3e1497

SHA512
25c2daaf7bc2cd9e2e12233d6f169670ba4fcca8c9307136822d8042bf945dbfff484ab90ffe9c2c21d4272ee8bd9133d955810a1d675079e2fc863d4554efd2

Download Submit
memory/2020-10-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/2948-0-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/2948-236-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads