73abf28aa566ce38bcda5da472bc4f9bcea7701f53393f6b898aa307f1876439

Analysis

max time kernel
180s
max time network
152s
platform
windows7_x64
resource
win7-20231020-en
resource tags

arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
submitted
22/10/2023, 07:39

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General

Target

NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
Size

20.8MB
MD5

e74979784b172043a0665a1e42554ad9
SHA1

48d8547b2bfc3c6bccde24fad65379d8e4874b8f
SHA256

73abf28aa566ce38bcda5da472bc4f9bcea7701f53393f6b898aa307f1876439
SHA512

c605c87232425cfe9d931a9e4c3d68384bcf271202f85dd89113f95dcde05e483cd2f590d410b88fdac3b821f4c2631a80b85c037a75b4977e709d21a3e11f98
SSDEEP

98304:9E2RpMMHMMMvMMZMMMlmMMMiMMMYJMMHMMM6MMZMMMqNMMzMMMUMMVMMMYJMMzM/:9nwngnwnBRi

Score

10^/10

persistence

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"	HelpMe.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe HelpMe.exe"	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe

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	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.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
2736	HelpMe.exe

Loads dropped DLL 2 IoCs

pid	Process
2824	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
2824	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.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)	\??\J:	HelpMe.exe
File opened (read-only)	\??\R:	HelpMe.exe
File opened (read-only)	\??\Z:	HelpMe.exe
File opened (read-only)	\??\G:	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
File opened (read-only)	\??\H:	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
File opened (read-only)	\??\Q:	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
File opened (read-only)	\??\T:	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
File opened (read-only)	\??\L:	HelpMe.exe
File opened (read-only)	\??\X:	HelpMe.exe
File opened (read-only)	\??\B:	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
File opened (read-only)	\??\U:	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
File opened (read-only)	\??\X:	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
File opened (read-only)	\??\K:	HelpMe.exe
File opened (read-only)	\??\U:	HelpMe.exe
File opened (read-only)	\??\A:	HelpMe.exe
File opened (read-only)	\??\N:	HelpMe.exe
File opened (read-only)	\??\O:	HelpMe.exe
File opened (read-only)	\??\Q:	HelpMe.exe
File opened (read-only)	\??\S:	HelpMe.exe
File opened (read-only)	\??\Y:	HelpMe.exe
File opened (read-only)	\??\E:	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
File opened (read-only)	\??\I:	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
File opened (read-only)	\??\J:	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
File opened (read-only)	\??\K:	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
File opened (read-only)	\??\R:	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
File opened (read-only)	\??\S:	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
File opened (read-only)	\??\E:	HelpMe.exe
File opened (read-only)	\??\P:	HelpMe.exe
File opened (read-only)	\??\T:	HelpMe.exe
File opened (read-only)	\??\V:	HelpMe.exe
File opened (read-only)	\??\A:	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
File opened (read-only)	\??\L:	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
File opened (read-only)	\??\Y:	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
File opened (read-only)	\??\Z:	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
File opened (read-only)	\??\B:	HelpMe.exe
File opened (read-only)	\??\H:	HelpMe.exe
File opened (read-only)	\??\P:	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
File opened (read-only)	\??\G:	HelpMe.exe
File opened (read-only)	\??\I:	HelpMe.exe
File opened (read-only)	\??\M:	HelpMe.exe
File opened (read-only)	\??\W:	HelpMe.exe
File opened (read-only)	\??\M:	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
File opened (read-only)	\??\N:	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
File opened (read-only)	\??\O:	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
File opened (read-only)	\??\V:	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
File opened (read-only)	\??\W:	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.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	HelpMe.exe
File opened for modification	F:\AUTORUN.INF	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
File opened for modification	C:\AUTORUN.INF	HelpMe.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\HelpMe.exe	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.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 2824 wrote to memory of 2736	2824	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe	29
PID 2824 wrote to memory of 2736	2824	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe	29
PID 2824 wrote to memory of 2736	2824	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe	29
PID 2824 wrote to memory of 2736	2824	NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe	29

C:\Users\Admin\AppData\Local\Temp\NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.exe
"C:\Users\Admin\AppData\Local\Temp\NEAS.2023-09-08_e74979784b172043a0665a1e42554ad9_ryuk_JC.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:2824
- 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:2736

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-1-5-21-274829-3448035668-3231875956-1000\desktop.ini.exe

Filesize
20.8MB

MD5
02d353967f65ee4d5196c7581e7fbbdb

SHA1
b3427151c71259926542c100304329ecae0efa65

SHA256
a1294bf09d7976124b3166113fccc3999e5c4aa7d75686bcd20bdecf93738ad5

SHA512
7cc82f78058682453334a49b8620a69a1b9d7c5636233d0e7a17fd58915b3520bb3e3a98ed03f53faf134c85c38075c043d0ca45f6535525be3bf6723744cb3e

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

Filesize
1KB

MD5
b078e01fff289ee94e35b57139861da9

SHA1
c7b511820885e0a1deb6dd84e5d98ce504f69739

SHA256
2049f4b6734ac65bf604cbf97d753a2491d4ef792d9f33a49b510dc2b254fa66

SHA512
dfabede49a24e06f41d3ddd2f7b8b6f6c9e1733b9445612d5702b380ff73bf78640646925a5f34283345c152ef1d29258dc09785e613fcc927507cae08bfb8e7

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

Filesize
946B

MD5
eed1fb482fb79ed78f9523fe65782098

SHA1
09c110f90357fa4520c252fe16956ccd8cfbba59

SHA256
ac9b5a9c8aba3f3053f805e8efb83a0fa4d3b132c7b0f2addeca6ce417a71c49

SHA512
36295fddcc1b05ce6b2320b1db5c1ecd6b61e1d8d42a3b84e56682ffac4fa34216e43e45c40092e9fbeba345990844b4bd4556bb9750fb38d0ce2a543c26844e

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

Filesize
1KB

MD5
b078e01fff289ee94e35b57139861da9

SHA1
c7b511820885e0a1deb6dd84e5d98ce504f69739

SHA256
2049f4b6734ac65bf604cbf97d753a2491d4ef792d9f33a49b510dc2b254fa66

SHA512
dfabede49a24e06f41d3ddd2f7b8b6f6c9e1733b9445612d5702b380ff73bf78640646925a5f34283345c152ef1d29258dc09785e613fcc927507cae08bfb8e7

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

Filesize
20.8MB

MD5
9d90205f9382666d3de761629b0866b3

SHA1
afa3cce36fc9be0de8f370db4a2ba020fae1ee97

SHA256
1c53c1316a873fbfaf13e5a8ea57c3435d3dea6aa4d21f8f9116e5bff2bebe2b

SHA512
9e6c26773bc32ad3958fc9b937a19d1b8a071396aec8db525e1d3e9142a40b8e526ed0e22903fec2e15ead0f0215cbe83ca60763367f2e02997a58eea414af73

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

Filesize
20.8MB

MD5
9d90205f9382666d3de761629b0866b3

SHA1
afa3cce36fc9be0de8f370db4a2ba020fae1ee97

SHA256
1c53c1316a873fbfaf13e5a8ea57c3435d3dea6aa4d21f8f9116e5bff2bebe2b

SHA512
9e6c26773bc32ad3958fc9b937a19d1b8a071396aec8db525e1d3e9142a40b8e526ed0e22903fec2e15ead0f0215cbe83ca60763367f2e02997a58eea414af73

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

Filesize
20.8MB

MD5
9d90205f9382666d3de761629b0866b3

SHA1
afa3cce36fc9be0de8f370db4a2ba020fae1ee97

SHA256
1c53c1316a873fbfaf13e5a8ea57c3435d3dea6aa4d21f8f9116e5bff2bebe2b

SHA512
9e6c26773bc32ad3958fc9b937a19d1b8a071396aec8db525e1d3e9142a40b8e526ed0e22903fec2e15ead0f0215cbe83ca60763367f2e02997a58eea414af73

Download Submit
F:\AUTORUN.INF

Filesize
145B

MD5
ca13857b2fd3895a39f09d9dde3cca97

SHA1
8b78c5b2ec97c372ebdcef92d14b0998f8dd6dd0

SHA256
cfe448b4506a95b33b529efa88f1ac704d8bdf98a941c065650ead27609318ae

SHA512
55e5b5325968d1e5314527fb2d26012f5aae4a1c38e305417be273400cb1c6d0c22b85bddb501d7a5720a3f53bb5caf6ada8a7894232344c4f6c6ef85d226b47

Download Submit
F:\AutoRun.exe

Filesize
20.8MB

MD5
9d90205f9382666d3de761629b0866b3

SHA1
afa3cce36fc9be0de8f370db4a2ba020fae1ee97

SHA256
1c53c1316a873fbfaf13e5a8ea57c3435d3dea6aa4d21f8f9116e5bff2bebe2b

SHA512
9e6c26773bc32ad3958fc9b937a19d1b8a071396aec8db525e1d3e9142a40b8e526ed0e22903fec2e15ead0f0215cbe83ca60763367f2e02997a58eea414af73

Download Submit
\Windows\SysWOW64\HelpMe.exe

Filesize
20.8MB

MD5
9d90205f9382666d3de761629b0866b3

SHA1
afa3cce36fc9be0de8f370db4a2ba020fae1ee97

SHA256
1c53c1316a873fbfaf13e5a8ea57c3435d3dea6aa4d21f8f9116e5bff2bebe2b

SHA512
9e6c26773bc32ad3958fc9b937a19d1b8a071396aec8db525e1d3e9142a40b8e526ed0e22903fec2e15ead0f0215cbe83ca60763367f2e02997a58eea414af73

Download Submit
\Windows\SysWOW64\HelpMe.exe

Filesize
20.8MB

MD5
9d90205f9382666d3de761629b0866b3

SHA1
afa3cce36fc9be0de8f370db4a2ba020fae1ee97

SHA256
1c53c1316a873fbfaf13e5a8ea57c3435d3dea6aa4d21f8f9116e5bff2bebe2b

SHA512
9e6c26773bc32ad3958fc9b937a19d1b8a071396aec8db525e1d3e9142a40b8e526ed0e22903fec2e15ead0f0215cbe83ca60763367f2e02997a58eea414af73

Download Submit
memory/2736-72-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/2736-88-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/2736-71-0x0000000000380000-0x0000000000381000-memory.dmp

Filesize
4KB

Download
memory/2824-1-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/2824-0-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/2824-85-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/2824-86-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/2824-87-0x0000000001F10000-0x0000000001F8B000-memory.dmp

Filesize
492KB

Download
memory/2824-10-0x0000000001F10000-0x0000000001F8B000-memory.dmp

Filesize
492KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads