ca3c9fb0766ab97ddc2209189ca76335bc977c7e65bb8cecebbed94288017e80

Analysis

max time kernel
146s
max time network
122s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
24-01-2024 00:22

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General

Target

70f267b878de849155db26eb85026868.exe
Size

1.2MB
MD5

70f267b878de849155db26eb85026868
SHA1

598e26d064075b4a471a85fbcca269f19a2ae394
SHA256

ca3c9fb0766ab97ddc2209189ca76335bc977c7e65bb8cecebbed94288017e80
SHA512

3173819bbc1693cc0627122a08ac288070ac6f2ed7648a2bbd4c89d6b21dedfabd2ee5952658f7a058aa9f6670c0e97da7cc6cea89812d64d2138f68793886c3
SSDEEP

12288:gp4pNfz3ymJnJ8QCFkxCaQTOl2GVq5w+kCbBmBCHm:aEtl9mRda1VI5wRCHm

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"	70f267b878de849155db26eb85026868.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	70f267b878de849155db26eb85026868.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	70f267b878de849155db26eb85026868.exe

Executes dropped EXE 1 IoCs

pid	Process
2312	HelpMe.exe

Loads dropped DLL 2 IoCs

pid	Process
2856	70f267b878de849155db26eb85026868.exe
2856	70f267b878de849155db26eb85026868.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)	\??\A:	70f267b878de849155db26eb85026868.exe
File opened (read-only)	\??\K:	HelpMe.exe
File opened (read-only)	\??\N:	HelpMe.exe
File opened (read-only)	\??\P:	HelpMe.exe
File opened (read-only)	\??\V:	HelpMe.exe
File opened (read-only)	\??\W:	HelpMe.exe
File opened (read-only)	\??\Z:	HelpMe.exe
File opened (read-only)	\??\E:	70f267b878de849155db26eb85026868.exe
File opened (read-only)	\??\I:	70f267b878de849155db26eb85026868.exe
File opened (read-only)	\??\M:	70f267b878de849155db26eb85026868.exe
File opened (read-only)	\??\X:	70f267b878de849155db26eb85026868.exe
File opened (read-only)	\??\A:	HelpMe.exe
File opened (read-only)	\??\O:	HelpMe.exe
File opened (read-only)	\??\X:	HelpMe.exe
File opened (read-only)	\??\G:	70f267b878de849155db26eb85026868.exe
File opened (read-only)	\??\J:	70f267b878de849155db26eb85026868.exe
File opened (read-only)	\??\Y:	70f267b878de849155db26eb85026868.exe
File opened (read-only)	\??\Z:	70f267b878de849155db26eb85026868.exe
File opened (read-only)	\??\M:	HelpMe.exe
File opened (read-only)	\??\R:	70f267b878de849155db26eb85026868.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)	\??\Q:	70f267b878de849155db26eb85026868.exe
File opened (read-only)	\??\V:	70f267b878de849155db26eb85026868.exe
File opened (read-only)	\??\I:	HelpMe.exe
File opened (read-only)	\??\Q:	HelpMe.exe
File opened (read-only)	\??\T:	HelpMe.exe
File opened (read-only)	\??\U:	HelpMe.exe
File opened (read-only)	\??\H:	70f267b878de849155db26eb85026868.exe
File opened (read-only)	\??\K:	70f267b878de849155db26eb85026868.exe
File opened (read-only)	\??\L:	70f267b878de849155db26eb85026868.exe
File opened (read-only)	\??\P:	70f267b878de849155db26eb85026868.exe
File opened (read-only)	\??\E:	HelpMe.exe
File opened (read-only)	\??\G:	HelpMe.exe
File opened (read-only)	\??\L:	HelpMe.exe
File opened (read-only)	\??\O:	70f267b878de849155db26eb85026868.exe
File opened (read-only)	\??\S:	70f267b878de849155db26eb85026868.exe
File opened (read-only)	\??\W:	70f267b878de849155db26eb85026868.exe
File opened (read-only)	\??\B:	HelpMe.exe
File opened (read-only)	\??\H:	HelpMe.exe
File opened (read-only)	\??\Y:	HelpMe.exe
File opened (read-only)	\??\B:	70f267b878de849155db26eb85026868.exe
File opened (read-only)	\??\N:	70f267b878de849155db26eb85026868.exe
File opened (read-only)	\??\T:	70f267b878de849155db26eb85026868.exe
File opened (read-only)	\??\U:	70f267b878de849155db26eb85026868.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	70f267b878de849155db26eb85026868.exe
File opened for modification	C:\AUTORUN.INF	70f267b878de849155db26eb85026868.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	70f267b878de849155db26eb85026868.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 2856 wrote to memory of 2312	2856	70f267b878de849155db26eb85026868.exe	28
PID 2856 wrote to memory of 2312	2856	70f267b878de849155db26eb85026868.exe	28
PID 2856 wrote to memory of 2312	2856	70f267b878de849155db26eb85026868.exe	28
PID 2856 wrote to memory of 2312	2856	70f267b878de849155db26eb85026868.exe	28

C:\Users\Admin\AppData\Local\Temp\70f267b878de849155db26eb85026868.exe
"C:\Users\Admin\AppData\Local\Temp\70f267b878de849155db26eb85026868.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:2856
- 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:2312

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-1-5-21-3427588347-1492276948-3422228430-1000\desktop.ini.exe

Filesize
1.2MB

MD5
4c3d15a8be9c98e103ada261c6d5b058

SHA1
790819b22e74e72766e287ba0431be5d601d4484

SHA256
3cbeed397684524e8a49bd4780b00a0dea3cac6895898cd413bd2f8b509feae2

SHA512
c57ec41e1f58f9db7c513b66b7bfed6facede705b7f958cb8a4d827413a069a9529a963e5f6fa77560340d8c9f8fa885db4dc36af878b59e87409574d9ef6296

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

Filesize
954B

MD5
0bf6b9529bb34ee71782923e06579d4b

SHA1
f68b27f6f3bc618cacfbb97ac574717c55f49c67

SHA256
e22ff4e015b8ed46bed78cc106625b4299a1b27b7179d3a15f96ed28686f2cd3

SHA512
d0645fd213ae0af970738cde07160629ff654a750921630b4dbd2f4fdccf95a97b4213a7e0c2da92cd3694170cb3a1662bdf3aa57f38d899ecfb86f89484d435

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

Filesize
1KB

MD5
85d7c2b1627d3d9ee6a34d10edd4d0ce

SHA1
389913dd2bec45d7abc3bf0d2a0417678430fd48

SHA256
cd0a3b0d4c14cdef1c89a667067cad12b0ff16e0d93361158c70904ac3b42677

SHA512
370494acf1be2bac51435c3c669040e2a10211dfb8a7a67114f63ad4f978e0329802d653fbcf7d8a799796f5c9343a9e3b934a4d748d395df80ba3ded76b96a3

Download Submit
F:\AUTORUN.INF

Filesize
145B

MD5
ca13857b2fd3895a39f09d9dde3cca97

SHA1
8b78c5b2ec97c372ebdcef92d14b0998f8dd6dd0

SHA256
cfe448b4506a95b33b529efa88f1ac704d8bdf98a941c065650ead27609318ae

SHA512
55e5b5325968d1e5314527fb2d26012f5aae4a1c38e305417be273400cb1c6d0c22b85bddb501d7a5720a3f53bb5caf6ada8a7894232344c4f6c6ef85d226b47

Download Submit
F:\AutoRun.exe

Filesize
1.2MB

MD5
70f267b878de849155db26eb85026868

SHA1
598e26d064075b4a471a85fbcca269f19a2ae394

SHA256
ca3c9fb0766ab97ddc2209189ca76335bc977c7e65bb8cecebbed94288017e80

SHA512
3173819bbc1693cc0627122a08ac288070ac6f2ed7648a2bbd4c89d6b21dedfabd2ee5952658f7a058aa9f6670c0e97da7cc6cea89812d64d2138f68793886c3

Download Submit
\Windows\SysWOW64\HelpMe.exe

Filesize
689KB

MD5
56db2894bda06b10c8a37eb67b96d222

SHA1
c076db71cc785b86d413dab6e9b44d47ecf9fcdd

SHA256
a7017ef1d735225e816719af9d4f1bb425cba6d69d844c57c1661acbc5825a48

SHA512
531fe39f7d2576bb56384f3b1f2fc9dfc8b30e05bddab406f3b3106049752e6bcf273cf15eb77b29ecf9f3856749297177e0aaf5685aee855846682bd46fd6a0

Download Submit
memory/2312-238-0x0000000000400000-0x000000000047894E-memory.dmp

Filesize
482KB

Download
memory/2312-14-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/2312-13-0x0000000000400000-0x000000000047894E-memory.dmp

Filesize
482KB

Download
memory/2856-4-0x0000000001DC0000-0x0000000001E39000-memory.dmp

Filesize
484KB

Download
memory/2856-0-0x0000000000400000-0x000000000047894E-memory.dmp

Filesize
482KB

Download
memory/2856-96-0x0000000000400000-0x000000000047894E-memory.dmp

Filesize
482KB

Download
memory/2856-231-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/2856-10-0x0000000001DC0000-0x0000000001E39000-memory.dmp

Filesize
484KB

Download
memory/2856-1-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads