a73cecf45e6c81dd12408de21432cd47744dff621c076ce225ac4d27bcc9da11

Analysis

max time kernel
147s
max time network
129s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
31-12-2023 12:49

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General

Target

36ba9d5937cb2c9674508dce3b1ee621.exe
Size

3.8MB
MD5

36ba9d5937cb2c9674508dce3b1ee621
SHA1

2bcf0d1fbbb6aa290a886527cfa8bf7fb4a5d91f
SHA256

a73cecf45e6c81dd12408de21432cd47744dff621c076ce225ac4d27bcc9da11
SHA512

83c45d979c62ad184c7bdbbcc96090b7f2c0390df041d204cb7b562b5c51089916a44b6839553caadfd3084c94f7067c94aa7804574c922d419a203a235fe79b
SSDEEP

49152:iEs12B8NIMI8Sfpwotkzaxc1OGz89yBaf3WZ:iE2TIMzKpXOMGQ9EZ

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"	36ba9d5937cb2c9674508dce3b1ee621.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	HelpMe.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	36ba9d5937cb2c9674508dce3b1ee621.exe

Executes dropped EXE 1 IoCs

pid	Process
2140	HelpMe.exe

Loads dropped DLL 2 IoCs

pid	Process
836	36ba9d5937cb2c9674508dce3b1ee621.exe
836	36ba9d5937cb2c9674508dce3b1ee621.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)	\??\U:	HelpMe.exe
File opened (read-only)	\??\O:	36ba9d5937cb2c9674508dce3b1ee621.exe
File opened (read-only)	\??\U:	36ba9d5937cb2c9674508dce3b1ee621.exe
File opened (read-only)	\??\S:	36ba9d5937cb2c9674508dce3b1ee621.exe
File opened (read-only)	\??\V:	36ba9d5937cb2c9674508dce3b1ee621.exe
File opened (read-only)	\??\N:	HelpMe.exe
File opened (read-only)	\??\P:	HelpMe.exe
File opened (read-only)	\??\R:	HelpMe.exe
File opened (read-only)	\??\W:	HelpMe.exe
File opened (read-only)	\??\A:	36ba9d5937cb2c9674508dce3b1ee621.exe
File opened (read-only)	\??\E:	36ba9d5937cb2c9674508dce3b1ee621.exe
File opened (read-only)	\??\T:	36ba9d5937cb2c9674508dce3b1ee621.exe
File opened (read-only)	\??\A:	HelpMe.exe
File opened (read-only)	\??\H:	HelpMe.exe
File opened (read-only)	\??\J:	HelpMe.exe
File opened (read-only)	\??\K:	HelpMe.exe
File opened (read-only)	\??\M:	HelpMe.exe
File opened (read-only)	\??\K:	36ba9d5937cb2c9674508dce3b1ee621.exe
File opened (read-only)	\??\R:	36ba9d5937cb2c9674508dce3b1ee621.exe
File opened (read-only)	\??\X:	HelpMe.exe
File opened (read-only)	\??\L:	36ba9d5937cb2c9674508dce3b1ee621.exe
File opened (read-only)	\??\I:	HelpMe.exe
File opened (read-only)	\??\Y:	36ba9d5937cb2c9674508dce3b1ee621.exe
File opened (read-only)	\??\Z:	36ba9d5937cb2c9674508dce3b1ee621.exe
File opened (read-only)	\??\B:	HelpMe.exe
File opened (read-only)	\??\L:	HelpMe.exe
File opened (read-only)	\??\T:	HelpMe.exe
File opened (read-only)	\??\Z:	HelpMe.exe
File opened (read-only)	\??\B:	36ba9d5937cb2c9674508dce3b1ee621.exe
File opened (read-only)	\??\Q:	36ba9d5937cb2c9674508dce3b1ee621.exe
File opened (read-only)	\??\M:	36ba9d5937cb2c9674508dce3b1ee621.exe
File opened (read-only)	\??\N:	36ba9d5937cb2c9674508dce3b1ee621.exe
File opened (read-only)	\??\W:	36ba9d5937cb2c9674508dce3b1ee621.exe
File opened (read-only)	\??\X:	36ba9d5937cb2c9674508dce3b1ee621.exe
File opened (read-only)	\??\G:	HelpMe.exe
File opened (read-only)	\??\O:	HelpMe.exe
File opened (read-only)	\??\H:	36ba9d5937cb2c9674508dce3b1ee621.exe
File opened (read-only)	\??\I:	36ba9d5937cb2c9674508dce3b1ee621.exe
File opened (read-only)	\??\V:	HelpMe.exe
File opened (read-only)	\??\Y:	HelpMe.exe
File opened (read-only)	\??\Q:	HelpMe.exe
File opened (read-only)	\??\J:	36ba9d5937cb2c9674508dce3b1ee621.exe
File opened (read-only)	\??\P:	36ba9d5937cb2c9674508dce3b1ee621.exe
File opened (read-only)	\??\S:	HelpMe.exe
File opened (read-only)	\??\G:	36ba9d5937cb2c9674508dce3b1ee621.exe
File opened (read-only)	\??\E:	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	36ba9d5937cb2c9674508dce3b1ee621.exe
File opened for modification	F:\AUTORUN.INF	HelpMe.exe
File opened for modification	C:\AUTORUN.INF	36ba9d5937cb2c9674508dce3b1ee621.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\HelpMe.exe	HelpMe.exe
File created	C:\Windows\SysWOW64\HelpMe.exe	36ba9d5937cb2c9674508dce3b1ee621.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 836 wrote to memory of 2140	836	36ba9d5937cb2c9674508dce3b1ee621.exe	28
PID 836 wrote to memory of 2140	836	36ba9d5937cb2c9674508dce3b1ee621.exe	28
PID 836 wrote to memory of 2140	836	36ba9d5937cb2c9674508dce3b1ee621.exe	28
PID 836 wrote to memory of 2140	836	36ba9d5937cb2c9674508dce3b1ee621.exe	28

C:\Users\Admin\AppData\Local\Temp\36ba9d5937cb2c9674508dce3b1ee621.exe
"C:\Users\Admin\AppData\Local\Temp\36ba9d5937cb2c9674508dce3b1ee621.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:836
- 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:2140

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-1-5-21-452311807-3713411997-1028535425-1000\desktop.ini.exe

Filesize
3.8MB

MD5
80847bd40361995db98b914609dd1cc3

SHA1
9c52cc640d6126fc0ebef2779d624167fbd3b44c

SHA256
b3700976d73d4de4ef4de87b9d5e92502d28457951d45e61a335b1fb09e562a8

SHA512
99a9d672054e151f55dbdebeeea1dbf0557024b1672fe39d6956af073a2e6d7560e11c06198a357aee345e00348743323a752365cdbf4aa8ac1e68abd560655c

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

Filesize
1KB

MD5
670d65c7634ea38b746ca98dba27a5a6

SHA1
d9bd0907f3257d5377fefb4a1516c7873139a591

SHA256
db7bd49ec4da77a0c239a2e6f15a564dda12a60ffdc3bbf84d563ea84d1a678b

SHA512
1052737c05890a323c67a61dcfd63c94bbd08514d6b1d2b91db56533c6783612431a55626d192c93d7ff1fef2dd720d51bf3f3360c38851388762cb4ced7e639

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

Filesize
950B

MD5
26c63f48e270ac7d171b6f3ed58f889c

SHA1
d8a0fe4fb687d1f3c639c13fea710056eb3ebb9a

SHA256
efaff8d52c78a88023f08770131b99c88dacd70c152ebfadc9fd16bb1a504340

SHA512
bb9ac63b1f31c761cec83d48ed816abdb19a83ea982eafd8ee5a88666b785985062d178bb8092497ea077a462bee6b34af5c17733091579a55fbc7570bcc6c41

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

Filesize
1KB

MD5
fc757634376e5fd70ee71550624c56a6

SHA1
ff6317b8fdc10e567ba06314799c89e55730addc

SHA256
547aa00a661fc32d8f0938d6a7e3c5796a4ea67fddc5edf17321ca386a8488d6

SHA512
0c7cad8095457f7b310d5baf20aaa94abc998d049bb6445a4c4102e9e4d4f585a1bf318b25660a843ab3d52ce610e0880ebe3bed39abc51315edd850769f7f3e

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

Filesize
3.2MB

MD5
8f307c097578d0f579a7ceb10bfd3e43

SHA1
171a311776a968a2d7558337f62b3d0eee8fb76b

SHA256
550c33088204f50626fd1d058f4062692397ea4f11d244dbe56aaabfdbcb2f59

SHA512
1bbf70b4c21ee11297acac6154686224508873733334dde1cacc84410274c761202c6ccb0c9415a3c75a839052ffd8bfb00bc91c34b3f4596b3d17b3912b000e

Download Submit
F:\AUTORUN.INF

Filesize
145B

MD5
ca13857b2fd3895a39f09d9dde3cca97

SHA1
8b78c5b2ec97c372ebdcef92d14b0998f8dd6dd0

SHA256
cfe448b4506a95b33b529efa88f1ac704d8bdf98a941c065650ead27609318ae

SHA512
55e5b5325968d1e5314527fb2d26012f5aae4a1c38e305417be273400cb1c6d0c22b85bddb501d7a5720a3f53bb5caf6ada8a7894232344c4f6c6ef85d226b47

Download Submit
F:\AutoRun.exe

Filesize
3.8MB

MD5
36ba9d5937cb2c9674508dce3b1ee621

SHA1
2bcf0d1fbbb6aa290a886527cfa8bf7fb4a5d91f

SHA256
a73cecf45e6c81dd12408de21432cd47744dff621c076ce225ac4d27bcc9da11

SHA512
83c45d979c62ad184c7bdbbcc96090b7f2c0390df041d204cb7b562b5c51089916a44b6839553caadfd3084c94f7067c94aa7804574c922d419a203a235fe79b

Download Submit
\Windows\SysWOW64\HelpMe.exe

Filesize
3.8MB

MD5
908ea1fef70b683227776e6de047663f

SHA1
3ef310e360e1db0a5d9afe626a67ae8a413dc186

SHA256
3209d3d9260bea0b846cf3549afb8cc445385729d8db17891d43dbecbeeeb9f3

SHA512
02c550d79c9c423a75a7bc44a699430e6882179bc7cf663a8b3d9f8c2a4ec9f5f2a176bfff203d9b243c0cecb4a327e14a3482d9a08e34325e03fcc692c1291e

Download Submit
memory/836-0-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/836-77-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/2140-10-0x00000000003B0000-0x00000000003B1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads