1d516331c26fc4b1a10921da6c8866fefdaa138d8d9c8d3da021218e962a482a

Analysis

max time kernel
145s
max time network
122s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
04/01/2024, 22:25

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General

Target

421118bd571a834357ec49375308462e.exe
Size

845KB
MD5

421118bd571a834357ec49375308462e
SHA1

30df90656713ea3847b0caf7296aa65d149c55c1
SHA256

1d516331c26fc4b1a10921da6c8866fefdaa138d8d9c8d3da021218e962a482a
SHA512

b8297a0ef67fa97942ef6849ff1fa564811d3b7529f9545224fa8913f0d75c028cf21f9404bb7802866543c18ca76f59d7e75108465b7c0293e100e0765303ec
SSDEEP

12288:Pp4pNfz3ymJnJ8QCFkxCaQTOl2K9KB8NIpYJTCiJ:xEtl9mRda1rKB8NIyX

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"	421118bd571a834357ec49375308462e.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 opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk	421118bd571a834357ec49375308462e.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk	421118bd571a834357ec49375308462e.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
2992	HelpMe.exe

Loads dropped DLL 2 IoCs

pid	Process
2216	421118bd571a834357ec49375308462e.exe
2216	421118bd571a834357ec49375308462e.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)	\??\B:	421118bd571a834357ec49375308462e.exe
File opened (read-only)	\??\V:	421118bd571a834357ec49375308462e.exe
File opened (read-only)	\??\L:	HelpMe.exe
File opened (read-only)	\??\V:	HelpMe.exe
File opened (read-only)	\??\K:	421118bd571a834357ec49375308462e.exe
File opened (read-only)	\??\P:	421118bd571a834357ec49375308462e.exe
File opened (read-only)	\??\M:	HelpMe.exe
File opened (read-only)	\??\R:	HelpMe.exe
File opened (read-only)	\??\A:	421118bd571a834357ec49375308462e.exe
File opened (read-only)	\??\E:	421118bd571a834357ec49375308462e.exe
File opened (read-only)	\??\G:	421118bd571a834357ec49375308462e.exe
File opened (read-only)	\??\J:	421118bd571a834357ec49375308462e.exe
File opened (read-only)	\??\R:	421118bd571a834357ec49375308462e.exe
File opened (read-only)	\??\X:	421118bd571a834357ec49375308462e.exe
File opened (read-only)	\??\I:	HelpMe.exe
File opened (read-only)	\??\X:	HelpMe.exe
File opened (read-only)	\??\H:	421118bd571a834357ec49375308462e.exe
File opened (read-only)	\??\Q:	421118bd571a834357ec49375308462e.exe
File opened (read-only)	\??\T:	421118bd571a834357ec49375308462e.exe
File opened (read-only)	\??\K:	HelpMe.exe
File opened (read-only)	\??\T:	HelpMe.exe
File opened (read-only)	\??\Z:	HelpMe.exe
File opened (read-only)	\??\U:	HelpMe.exe
File opened (read-only)	\??\M:	421118bd571a834357ec49375308462e.exe
File opened (read-only)	\??\O:	421118bd571a834357ec49375308462e.exe
File opened (read-only)	\??\Y:	421118bd571a834357ec49375308462e.exe
File opened (read-only)	\??\E:	HelpMe.exe
File opened (read-only)	\??\G:	HelpMe.exe
File opened (read-only)	\??\J:	HelpMe.exe
File opened (read-only)	\??\N:	HelpMe.exe
File opened (read-only)	\??\A:	HelpMe.exe
File opened (read-only)	\??\B:	HelpMe.exe
File opened (read-only)	\??\Q:	HelpMe.exe
File opened (read-only)	\??\S:	HelpMe.exe
File opened (read-only)	\??\L:	421118bd571a834357ec49375308462e.exe
File opened (read-only)	\??\S:	421118bd571a834357ec49375308462e.exe
File opened (read-only)	\??\W:	421118bd571a834357ec49375308462e.exe
File opened (read-only)	\??\H:	HelpMe.exe
File opened (read-only)	\??\O:	HelpMe.exe
File opened (read-only)	\??\Y:	HelpMe.exe
File opened (read-only)	\??\I:	421118bd571a834357ec49375308462e.exe
File opened (read-only)	\??\N:	421118bd571a834357ec49375308462e.exe
File opened (read-only)	\??\U:	421118bd571a834357ec49375308462e.exe
File opened (read-only)	\??\Z:	421118bd571a834357ec49375308462e.exe
File opened (read-only)	\??\P:	HelpMe.exe
File opened (read-only)	\??\W:	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	C:\AUTORUN.INF	421118bd571a834357ec49375308462e.exe
File opened for modification	F:\AUTORUN.INF	HelpMe.exe
File opened for modification	F:\AUTORUN.INF	421118bd571a834357ec49375308462e.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\HelpMe.exe	421118bd571a834357ec49375308462e.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 2216 wrote to memory of 2992	2216	421118bd571a834357ec49375308462e.exe	28
PID 2216 wrote to memory of 2992	2216	421118bd571a834357ec49375308462e.exe	28
PID 2216 wrote to memory of 2992	2216	421118bd571a834357ec49375308462e.exe	28
PID 2216 wrote to memory of 2992	2216	421118bd571a834357ec49375308462e.exe	28

C:\Users\Admin\AppData\Local\Temp\421118bd571a834357ec49375308462e.exe
"C:\Users\Admin\AppData\Local\Temp\421118bd571a834357ec49375308462e.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:2216
- 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:2992

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-1-5-21-3470981204-343661084-3367201002-1000\desktop.ini.exe

Filesize
260KB

MD5
08eb34506ff7fc730620eb840b9c4ae1

SHA1
0814525d1e88866a10f4085fd7c6fd622bf03dc7

SHA256
969d0bc4bb71a5a2b551a3d46aee96cb04d6490ddf652a829fbe608887f1693a

SHA512
056f42767970bae61a2d26a21163285a78b910f4588d1a19927af77bd4f131e7427e7e71f2f95c41912e187c10a92d429a556737bb5b1ed4126c42a479a5ca62

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

Filesize
1KB

MD5
4d515e55bdbfc89a7f7bdffc2604a389

SHA1
88418f75338f49afba5bc6398948dac330865734

SHA256
fb235de09fa1a7756c2cd0a5792d2659a698487fb582edfc902db91d2cb0b766

SHA512
efacf880da502638f206a126ce669b8f5bd2ea650a4ae0c1e0508e0a898d4aaa4db5663957509de91967b03560b9910478d5b9989ac847f27c48c47b44f11505

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

Filesize
950B

MD5
cfd5104c82653e8c4cfe0e30d0930d9f

SHA1
4b0e16e5f64619fe8d0fb79efefc53967334d2a4

SHA256
7ca2d708114b982011724bf304810ca56fa3e86f6b966ec9136bcc36ee0e9458

SHA512
4360a895611d6efd1689dbae974d4074986fccfc42a928ea8f1b21b4653135eee62278a06007f4fe804e591cbd34aa8f7fc82b38e0144eecc02d7179dc3b4d0a

Download Submit
C:\Windows\SysWOW64\HelpMe.exe

Filesize
385KB

MD5
1bcd4d59da0c647f940839276ac9e7d2

SHA1
11fae1d6c7dd6937fd5542df74058b0b4a5c105c

SHA256
b7f46633e6e0ed83258284984406577aec7478605d56f55f4d4d1d82a98dd307

SHA512
fb0caaa6d3f0c80c553a7cf6efc56da033ac3dfb0a890f6da66147a64783c1a5557627473875f1c72d7762f868b0bdfe5a8984b0c609f6afd20ed92bcedb6f12

Download Submit
C:\Windows\SysWOW64\HelpMe.exe

Filesize
392KB

MD5
07a2155a07c53c924f83f17d31731a4a

SHA1
1cd9fd9198fc5641f5aaf1391fb627b362d624a4

SHA256
2e6a83f156d5a21ea8692a8a5aa79fdaa98388cc45fbf3015f92953c5a2d08ef

SHA512
7f42767a506be17a3e4159edf8b3d93f45f7babd102139328163a40143ca8e85619a4133f26da9ddc169744ebbfe8c456dae156bfc1dda8decc911ff17734ef6

Download Submit
F:\AUTORUN.INF

Filesize
145B

MD5
ca13857b2fd3895a39f09d9dde3cca97

SHA1
8b78c5b2ec97c372ebdcef92d14b0998f8dd6dd0

SHA256
cfe448b4506a95b33b529efa88f1ac704d8bdf98a941c065650ead27609318ae

SHA512
55e5b5325968d1e5314527fb2d26012f5aae4a1c38e305417be273400cb1c6d0c22b85bddb501d7a5720a3f53bb5caf6ada8a7894232344c4f6c6ef85d226b47

Download Submit
F:\AutoRun.exe

Filesize
193KB

MD5
b5902c0f74063f326a876d44e64fdc86

SHA1
a90efac297696f3238c04cb74effdd663671aca8

SHA256
65a386833c968ec12457904b93e42d4b949e0774fa1061688fa65a66e9c46a04

SHA512
2246358211eac0b7d3e69a9fa4bbba5f4d6ae267d4cdd45b0e3477c112f21ce9dd6e809fa0c35e9b393333a148fee7bdb93e1dd710b689923bb87556bbcf4bf2

Download Submit
\Windows\SysWOW64\HelpMe.exe

Filesize
840KB

MD5
9ceab6b4251f70590a4cf63e4289e8ae

SHA1
a554029c53b79af300aaff7d4949ce661d9f5df5

SHA256
67c12fe54530b040271b70e8e746a5fe243c4efa9ddacaa058f9a7396888116a

SHA512
4838407fd58a5b484cdf400197047a5ed24e4e5631fcde66646b11e49d56884192ddd06d217987a9379cc8c2b760732e02c9814ad9d2880878a3ab4fd92fd33e

Download Submit
memory/2216-0-0x00000000003C0000-0x00000000003C1000-memory.dmp

Filesize
4KB

Download
memory/2216-236-0x00000000003C0000-0x00000000003C1000-memory.dmp

Filesize
4KB

Download
memory/2992-9-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/2992-237-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads