ryuk | e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf

Analysis

max time kernel
199s
max time network
204s
platform
windows10-2004_x64
resource
win10v2004-en-20220113
submitted
20-02-2022 01:06

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General

Target

e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe
Size

192KB
MD5

ce36b667dc2411b83ab678a66c42065a
SHA1

40a41587d785406e2d5c8b782492f18b8c034305
SHA256

e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf
SHA512

503f0fc072271880a13bb412eee27191e8d2f1d0af51daf5d4d55be6f33843f6427a0155e1600d447526147a7647e1c883853e30fe72a57904bd613af16104ff

Score

10^/10

ryuk persistence ransomware

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\RyukReadMe.html

Family

ryuk

Ransom Note

<html><body><p style="font-weight:bold;font-size:125%;top:0;left:0;"> [email protected] <br> </p><p style="position:absolute;bottom:0;right:1%;font-weight:bold;font-size:170%">balance of shadow universe</p><div style="font-size: 550%;font-weight:bold;width:50%;height:50%;overflow:auto;margin:auto;position:absolute;top:35%;left:40%;">Ryuk</div></body></html��

Emails

[email protected]

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\RyukReadMe.html

Family

ryuk

Ransom Note

[email protected] balance of shadow universe Ryuk

Emails

[email protected]

Signatures

Ryuk
Ransomware distributed via existing botnets, often Trickbot or Emotet.
ransomware ryuk

Executes dropped EXE 1 IoCs

pid	Process
1272	uIVJKOG.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation	uIVJKOG.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchos = "C:\\Users\\Admin\\AppData\\Local\\Temp\\uIVJKOG.exe"	reg.exe
Key created	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchos = "C:\\Users\\Admin\\AppData\\Local\\Temp\\e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe"	reg.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Runs net.exe

Suspicious behavior: EnumeratesProcesses 20 IoCs

pid	Process
2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe
2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe
2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe
2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe
1272	uIVJKOG.exe
1272	uIVJKOG.exe
2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe
2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe
2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe
2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe
1272	uIVJKOG.exe
1272	uIVJKOG.exe
2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe
2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe
2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe
2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe
1272	uIVJKOG.exe
1272	uIVJKOG.exe
2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe
2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe
Token: SeBackupPrivilege	1272	uIVJKOG.exe
Token: SeBackupPrivilege	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2196 wrote to memory of 1272	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	84
PID 2196 wrote to memory of 1272	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	84
PID 2196 wrote to memory of 1272	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	84
PID 2196 wrote to memory of 2340	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	49
PID 2196 wrote to memory of 4740	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	85
PID 2196 wrote to memory of 4740	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	85
PID 2196 wrote to memory of 4740	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	85
PID 4740 wrote to memory of 2288	4740	net.exe	87
PID 4740 wrote to memory of 2288	4740	net.exe	87
PID 4740 wrote to memory of 2288	4740	net.exe	87
PID 2196 wrote to memory of 2356	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	48
PID 2196 wrote to memory of 1900	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	88
PID 2196 wrote to memory of 1900	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	88
PID 2196 wrote to memory of 1900	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	88
PID 1900 wrote to memory of 4884	1900	net.exe	90
PID 1900 wrote to memory of 4884	1900	net.exe	90
PID 1900 wrote to memory of 4884	1900	net.exe	90
PID 2196 wrote to memory of 2432	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	47
PID 2196 wrote to memory of 2800	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	36
PID 2196 wrote to memory of 3252	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	35
PID 2196 wrote to memory of 3352	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	34
PID 2196 wrote to memory of 3420	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	12
PID 2196 wrote to memory of 3496	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	33
PID 2196 wrote to memory of 3748	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	32
PID 2196 wrote to memory of 384	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	29
PID 2196 wrote to memory of 1032	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	16
PID 2196 wrote to memory of 3432	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	15
PID 1272 wrote to memory of 4464	1272	uIVJKOG.exe	93
PID 1272 wrote to memory of 4464	1272	uIVJKOG.exe	93
PID 1272 wrote to memory of 4464	1272	uIVJKOG.exe	93
PID 4464 wrote to memory of 4524	4464	net.exe	95
PID 4464 wrote to memory of 4524	4464	net.exe	95
PID 4464 wrote to memory of 4524	4464	net.exe	95
PID 2196 wrote to memory of 3652	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	96
PID 2196 wrote to memory of 3652	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	96
PID 2196 wrote to memory of 3652	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	96
PID 3652 wrote to memory of 3720	3652	net.exe	98
PID 3652 wrote to memory of 3720	3652	net.exe	98
PID 3652 wrote to memory of 3720	3652	net.exe	98
PID 2196 wrote to memory of 3704	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	99
PID 2196 wrote to memory of 3704	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	99
PID 2196 wrote to memory of 3704	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	99
PID 3704 wrote to memory of 4508	3704	cmd.exe	101
PID 3704 wrote to memory of 4508	3704	cmd.exe	101
PID 3704 wrote to memory of 4508	3704	cmd.exe	101
PID 1272 wrote to memory of 6076	1272	uIVJKOG.exe	102
PID 1272 wrote to memory of 6076	1272	uIVJKOG.exe	102
PID 1272 wrote to memory of 6076	1272	uIVJKOG.exe	102
PID 6076 wrote to memory of 6132	6076	cmd.exe	104
PID 6076 wrote to memory of 6132	6076	cmd.exe	104
PID 6076 wrote to memory of 6132	6076	cmd.exe	104
PID 2196 wrote to memory of 12992	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	105
PID 2196 wrote to memory of 12992	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	105
PID 2196 wrote to memory of 12992	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	105
PID 12992 wrote to memory of 12796	12992	net.exe	107
PID 12992 wrote to memory of 12796	12992	net.exe	107
PID 12992 wrote to memory of 12796	12992	net.exe	107
PID 1272 wrote to memory of 14072	1272	uIVJKOG.exe	108
PID 1272 wrote to memory of 14072	1272	uIVJKOG.exe	108
PID 1272 wrote to memory of 14072	1272	uIVJKOG.exe	108
PID 14072 wrote to memory of 14188	14072	net.exe	110
PID 14072 wrote to memory of 14188	14072	net.exe	110
PID 14072 wrote to memory of 14188	14072	net.exe	110
PID 2196 wrote to memory of 14320	2196	e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe	111

C:\Windows\System32\RuntimeBroker.exe
C:\Windows\System32\RuntimeBroker.exe -Embedding
1⤵
PID:3420

C:\Windows\System32\RuntimeBroker.exe
C:\Windows\System32\RuntimeBroker.exe -Embedding
1⤵
PID:3432

C:\Windows\system32\backgroundTaskHost.exe
"C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca
1⤵
PID:1032

C:\Windows\System32\RuntimeBroker.exe
C:\Windows\System32\RuntimeBroker.exe -Embedding
1⤵
PID:384

C:\Windows\System32\RuntimeBroker.exe
C:\Windows\System32\RuntimeBroker.exe -Embedding
1⤵
PID:3748

C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
"C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
1⤵
PID:3496

C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
"C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
1⤵
PID:3352

C:\Windows\system32\DllHost.exe
C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
1⤵
PID:3252

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p -s cbdhsvc
1⤵
PID:2800

C:\Windows\system32\taskhostw.exe
taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
1⤵
PID:2432

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k UnistackSvcGroup -s CDPUserSvc
1⤵
PID:2356

C:\Windows\system32\sihost.exe
sihost.exe
1⤵
PID:2340

C:\Users\Admin\AppData\Local\Temp\e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe
"C:\Users\Admin\AppData\Local\Temp\e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2196
- C:\Users\Admin\AppData\Local\Temp\uIVJKOG.exe
  "C:\Users\Admin\AppData\Local\Temp\uIVJKOG.exe" 8 LAN
  2⤵
  - Executes dropped EXE
  - Checks computer location settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1272
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4464
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:4524
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\uIVJKOG.exe" /f /reg:64
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:6076
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\uIVJKOG.exe" /f /reg:64
      4⤵
      Adds Run key to start application
      PID:6132
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:14072
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:14188
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    PID:15304
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:16800
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4740
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:2288
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1900
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:4884
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3652
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:3720
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe" /f /reg:64
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3704
- - C:\Windows\SysWOW64\reg.exe
    REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\e33cc528ba4611636e7d1f52f634f46cb0fe9ae7e25250b04723452f994aaddf.exe" /f /reg:64
    3⤵
    - Adds Run key to start application
    PID:4508
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:12992
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:12796
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:14320
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:13468
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:15124
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:15180
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:15604
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:16808

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv
1⤵
PID:15084

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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