526eaa757a7decc4fc63c22a2e32a8300ffaba39fd9c892076bdde8d9478501d

Analysis

max time kernel
146s
max time network
126s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
15-03-2024 00:15

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

c9ff8c75fcb257fc874d6f99e0b76255.exe
Size

851KB
MD5

c9ff8c75fcb257fc874d6f99e0b76255
SHA1

0693569792ca8798936dc41a017fa1478303f4cf
SHA256

526eaa757a7decc4fc63c22a2e32a8300ffaba39fd9c892076bdde8d9478501d
SHA512

6161fb87ee09eaf180a7fdb3b9df9707421749214b343f880d9f8b2b6ed2ab7be3543c5acd28f82e8bcd68ec64286621e24783d7c3f7682e3aa640ae7b071c25
SSDEEP

12288:Pp4pNfz3ymJnJ8QCFkxCaQTOl2KY4vbAfxu/F96sO0:xEtl9mRda1C4kfxuX6sO0

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"	c9ff8c75fcb257fc874d6f99e0b76255.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	c9ff8c75fcb257fc874d6f99e0b76255.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	c9ff8c75fcb257fc874d6f99e0b76255.exe

Executes dropped EXE 1 IoCs

pid	Process
2960	HelpMe.exe

Loads dropped DLL 2 IoCs

pid	Process
2404	c9ff8c75fcb257fc874d6f99e0b76255.exe
2404	c9ff8c75fcb257fc874d6f99e0b76255.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:	HelpMe.exe
File opened (read-only)	\??\Z:	HelpMe.exe
File opened (read-only)	\??\U:	c9ff8c75fcb257fc874d6f99e0b76255.exe
File opened (read-only)	\??\H:	HelpMe.exe
File opened (read-only)	\??\I:	HelpMe.exe
File opened (read-only)	\??\L:	HelpMe.exe
File opened (read-only)	\??\P:	HelpMe.exe
File opened (read-only)	\??\B:	HelpMe.exe
File opened (read-only)	\??\Y:	HelpMe.exe
File opened (read-only)	\??\K:	c9ff8c75fcb257fc874d6f99e0b76255.exe
File opened (read-only)	\??\P:	c9ff8c75fcb257fc874d6f99e0b76255.exe
File opened (read-only)	\??\Q:	c9ff8c75fcb257fc874d6f99e0b76255.exe
File opened (read-only)	\??\T:	c9ff8c75fcb257fc874d6f99e0b76255.exe
File opened (read-only)	\??\A:	HelpMe.exe
File opened (read-only)	\??\N:	c9ff8c75fcb257fc874d6f99e0b76255.exe
File opened (read-only)	\??\Z:	c9ff8c75fcb257fc874d6f99e0b76255.exe
File opened (read-only)	\??\G:	HelpMe.exe
File opened (read-only)	\??\R:	HelpMe.exe
File opened (read-only)	\??\E:	HelpMe.exe
File opened (read-only)	\??\K:	HelpMe.exe
File opened (read-only)	\??\S:	HelpMe.exe
File opened (read-only)	\??\E:	c9ff8c75fcb257fc874d6f99e0b76255.exe
File opened (read-only)	\??\J:	c9ff8c75fcb257fc874d6f99e0b76255.exe
File opened (read-only)	\??\M:	c9ff8c75fcb257fc874d6f99e0b76255.exe
File opened (read-only)	\??\O:	c9ff8c75fcb257fc874d6f99e0b76255.exe
File opened (read-only)	\??\Y:	c9ff8c75fcb257fc874d6f99e0b76255.exe
File opened (read-only)	\??\U:	HelpMe.exe
File opened (read-only)	\??\G:	c9ff8c75fcb257fc874d6f99e0b76255.exe
File opened (read-only)	\??\H:	c9ff8c75fcb257fc874d6f99e0b76255.exe
File opened (read-only)	\??\L:	c9ff8c75fcb257fc874d6f99e0b76255.exe
File opened (read-only)	\??\S:	c9ff8c75fcb257fc874d6f99e0b76255.exe
File opened (read-only)	\??\V:	HelpMe.exe
File opened (read-only)	\??\V:	c9ff8c75fcb257fc874d6f99e0b76255.exe
File opened (read-only)	\??\J:	HelpMe.exe
File opened (read-only)	\??\M:	HelpMe.exe
File opened (read-only)	\??\X:	HelpMe.exe
File opened (read-only)	\??\B:	c9ff8c75fcb257fc874d6f99e0b76255.exe
File opened (read-only)	\??\R:	c9ff8c75fcb257fc874d6f99e0b76255.exe
File opened (read-only)	\??\W:	c9ff8c75fcb257fc874d6f99e0b76255.exe
File opened (read-only)	\??\T:	HelpMe.exe
File opened (read-only)	\??\W:	HelpMe.exe
File opened (read-only)	\??\A:	c9ff8c75fcb257fc874d6f99e0b76255.exe
File opened (read-only)	\??\I:	c9ff8c75fcb257fc874d6f99e0b76255.exe
File opened (read-only)	\??\X:	c9ff8c75fcb257fc874d6f99e0b76255.exe
File opened (read-only)	\??\N:	HelpMe.exe
File opened (read-only)	\??\O:	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	c9ff8c75fcb257fc874d6f99e0b76255.exe
File opened for modification	F:\AUTORUN.INF	HelpMe.exe
File opened for modification	F:\AUTORUN.INF	c9ff8c75fcb257fc874d6f99e0b76255.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\HelpMe.exe	c9ff8c75fcb257fc874d6f99e0b76255.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 2404 wrote to memory of 2960	2404	c9ff8c75fcb257fc874d6f99e0b76255.exe	28
PID 2404 wrote to memory of 2960	2404	c9ff8c75fcb257fc874d6f99e0b76255.exe	28
PID 2404 wrote to memory of 2960	2404	c9ff8c75fcb257fc874d6f99e0b76255.exe	28
PID 2404 wrote to memory of 2960	2404	c9ff8c75fcb257fc874d6f99e0b76255.exe	28

C:\Users\Admin\AppData\Local\Temp\c9ff8c75fcb257fc874d6f99e0b76255.exe
"C:\Users\Admin\AppData\Local\Temp\c9ff8c75fcb257fc874d6f99e0b76255.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:2404
- 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:2960

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\$Recycle.Bin\S-1-5-21-406356229-2805545415-1236085040-1000\desktop.ini.exe

Filesize
852KB

MD5
693a17037ab23904ecc7309c36e12eed

SHA1
6140cdcb5d2fe3fbc56392d473e9946be95fa168

SHA256
0db1b24dd90d6078cb3680d5e857b354a716ac5142f91790434d93f461bb61a4

SHA512
ab6e980a973fd912a7137046c88ee298102b7e8433fbce85eb9bb726de65b8248a4fea306464e81f29837430b2b50e1c669e6c20bee0110ded559bcf591b35ea

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

Filesize
950B

MD5
2a0c59647904ad28c312f6da2d1a2235

SHA1
1014b66b303338699e25c84327c81088e5c7fc57

SHA256
b30cb49c7ca901b83f43bf73687e4587d25a70f2391ee71c05863ac2fcb0a6dc

SHA512
6593847c0432cb3b2e3ece462b28567a0cf582633790340df3f9978e3f1df927434051298c36a12c4b0f7b18da1438fe70e00ff0470ce30851bac4232e5b6372

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

Filesize
1KB

MD5
f4abef237cb99699191d5153febfc0be

SHA1
b9b3957b6685cd2b8444fe2fb684829c20dbe992

SHA256
c0a460d9fd5b7b1b68b41c695a84aff49e7acffbba46bd7877f81f1c051e78d8

SHA512
c63279c0ce76acab41b4dd06eb8ba4d8087bba6044d109a38550e349c75b5b6c902e90a3bd822570a99bf113a4cae9943f5774cb147e6ba626ab777126cdc790

Download Submit
F:\AUTORUN.INF

Filesize
145B

MD5
ca13857b2fd3895a39f09d9dde3cca97

SHA1
8b78c5b2ec97c372ebdcef92d14b0998f8dd6dd0

SHA256
cfe448b4506a95b33b529efa88f1ac704d8bdf98a941c065650ead27609318ae

SHA512
55e5b5325968d1e5314527fb2d26012f5aae4a1c38e305417be273400cb1c6d0c22b85bddb501d7a5720a3f53bb5caf6ada8a7894232344c4f6c6ef85d226b47

Download Submit
F:\AutoRun.exe

Filesize
851KB

MD5
c9ff8c75fcb257fc874d6f99e0b76255

SHA1
0693569792ca8798936dc41a017fa1478303f4cf

SHA256
526eaa757a7decc4fc63c22a2e32a8300ffaba39fd9c892076bdde8d9478501d

SHA512
6161fb87ee09eaf180a7fdb3b9df9707421749214b343f880d9f8b2b6ed2ab7be3543c5acd28f82e8bcd68ec64286621e24783d7c3f7682e3aa640ae7b071c25

Download Submit
\Windows\SysWOW64\HelpMe.exe

Filesize
851KB

MD5
af495d66478ced061ddb07fc05d6ed89

SHA1
d9f4e80cb8713fbe508d16fd309cf02321aa4d7e

SHA256
42d64779d58df3d6c444f6b3330a7308e9f035ba93cd21bd6c6acf2da3e80428

SHA512
d666d0f3dc1b8ac44ae3da4204c1a6b794d4ecf1aae033b77d56f66570c69962e82505df58bc1345e3ce012a5d14cd4cf4cbc344b279baeb8ff6bb117396d457

Download Submit
memory/2404-0-0x00000000001B0000-0x00000000001B1000-memory.dmp

Filesize
4KB

Download
memory/2404-236-0x00000000001B0000-0x00000000001B1000-memory.dmp

Filesize
4KB

Download
memory/2960-9-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/2960-237-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads