ryuk | a30398ce3dc4fd04ddacb9408a136bc848e3a88ea98a486a93f4e7dc9650b218

Analysis

max time kernel
34s
max time network
152s
platform
windows10_x64
resource
win10v20201028
submitted
07-03-2021 22:11

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General

Target

860e50.bin.exe
Size

196KB
MD5

484a2bcb1335ac97ee91194f4c0964bc
SHA1

ad11ed52ab33ad05eb9b1e9ade134ca1348acc81
SHA256

40b865d1c3ab1b8544bcf57c88edd30679870d40b27d62feb237a19f0c5f9cd1
SHA512

6e61612bd29425c5ab9b648fa83bc2d8616071247f8659aa316ab9d4adde0a9ceb9301737bb4216db223dfdd371106da75463f6d7e3a88e1c4cdd6c821f3935f

Score

10^/10

ryuk discovery persistence ransomware

Malware Config

Signatures

Ryuk
Ransomware distributed via existing botnets, often Trickbot or Emotet.
ransomware ryuk
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490

Executes dropped EXE 1 IoCs

pid	Process
3596	dqlkEIY.exe

Modifies file permissions 1 TTPs 4 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3192	icacls.exe
1152	icacls.exe
2844	icacls.exe
1584	icacls.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchos = "C:\\Users\\Admin\\AppData\\Local\\Temp\\860e50.bin.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

Interacts with shadow copies 2 TTPs 2 IoCs

Shadow copies are often targeted by ransomware to inhibit system recovery.

ransomware

File Deletion

T1107

Inhibit System Recovery

T1490

pid	Process
1980	vssadmin.exe
3880	vssadmin.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
44520	taskkill.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1812	860e50.bin.exe
1812	860e50.bin.exe
1812	860e50.bin.exe
1812	860e50.bin.exe
3596	dqlkEIY.exe
3596	dqlkEIY.exe
1812	860e50.bin.exe
1812	860e50.bin.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1812	860e50.bin.exe
Token: SeBackupPrivilege	3596	dqlkEIY.exe
Token: SeBackupPrivilege	4036	vssvc.exe
Token: SeRestorePrivilege	4036	vssvc.exe
Token: SeAuditPrivilege	4036	vssvc.exe
Token: SeIncreaseQuotaPrivilege	3928	WMIC.exe
Token: SeSecurityPrivilege	3928	WMIC.exe
Token: SeTakeOwnershipPrivilege	3928	WMIC.exe
Token: SeLoadDriverPrivilege	3928	WMIC.exe
Token: SeSystemProfilePrivilege	3928	WMIC.exe
Token: SeSystemtimePrivilege	3928	WMIC.exe
Token: SeProfSingleProcessPrivilege	3928	WMIC.exe
Token: SeIncBasePriorityPrivilege	3928	WMIC.exe
Token: SeCreatePagefilePrivilege	3928	WMIC.exe
Token: SeBackupPrivilege	3928	WMIC.exe
Token: SeRestorePrivilege	3928	WMIC.exe
Token: SeShutdownPrivilege	3928	WMIC.exe
Token: SeDebugPrivilege	3928	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3928	WMIC.exe
Token: SeRemoteShutdownPrivilege	3928	WMIC.exe
Token: SeUndockPrivilege	3928	WMIC.exe
Token: SeManageVolumePrivilege	3928	WMIC.exe
Token: 33	3928	WMIC.exe
Token: 34	3928	WMIC.exe
Token: 35	3928	WMIC.exe
Token: 36	3928	WMIC.exe
Token: SeIncreaseQuotaPrivilege	3928	WMIC.exe
Token: SeSecurityPrivilege	3928	WMIC.exe
Token: SeTakeOwnershipPrivilege	3928	WMIC.exe
Token: SeLoadDriverPrivilege	3928	WMIC.exe
Token: SeSystemProfilePrivilege	3928	WMIC.exe
Token: SeSystemtimePrivilege	3928	WMIC.exe
Token: SeProfSingleProcessPrivilege	3928	WMIC.exe
Token: SeIncBasePriorityPrivilege	3928	WMIC.exe
Token: SeCreatePagefilePrivilege	3928	WMIC.exe
Token: SeBackupPrivilege	3928	WMIC.exe
Token: SeRestorePrivilege	3928	WMIC.exe
Token: SeShutdownPrivilege	3928	WMIC.exe
Token: SeDebugPrivilege	3928	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3928	WMIC.exe
Token: SeRemoteShutdownPrivilege	3928	WMIC.exe
Token: SeUndockPrivilege	3928	WMIC.exe
Token: SeManageVolumePrivilege	3928	WMIC.exe
Token: 33	3928	WMIC.exe
Token: 34	3928	WMIC.exe
Token: 35	3928	WMIC.exe
Token: 36	3928	WMIC.exe
Token: SeBackupPrivilege	1812	860e50.bin.exe
Token: SeIncreaseQuotaPrivilege	4612	WMIC.exe
Token: SeSecurityPrivilege	4612	WMIC.exe
Token: SeTakeOwnershipPrivilege	4612	WMIC.exe
Token: SeLoadDriverPrivilege	4612	WMIC.exe
Token: SeSystemProfilePrivilege	4612	WMIC.exe
Token: SeSystemtimePrivilege	4612	WMIC.exe
Token: SeProfSingleProcessPrivilege	4612	WMIC.exe
Token: SeIncBasePriorityPrivilege	4612	WMIC.exe
Token: SeCreatePagefilePrivilege	4612	WMIC.exe
Token: SeBackupPrivilege	4612	WMIC.exe
Token: SeRestorePrivilege	4612	WMIC.exe
Token: SeShutdownPrivilege	4612	WMIC.exe
Token: SeDebugPrivilege	4612	WMIC.exe
Token: SeSystemEnvironmentPrivilege	4612	WMIC.exe
Token: SeRemoteShutdownPrivilege	4612	WMIC.exe
Token: SeUndockPrivilege	4612	WMIC.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1812 wrote to memory of 3596	1812	860e50.bin.exe	75
PID 1812 wrote to memory of 3596	1812	860e50.bin.exe	75
PID 1812 wrote to memory of 3596	1812	860e50.bin.exe	75
PID 1812 wrote to memory of 2300	1812	860e50.bin.exe	33
PID 1812 wrote to memory of 2308	1812	860e50.bin.exe	32
PID 1812 wrote to memory of 712	1812	860e50.bin.exe	76
PID 1812 wrote to memory of 712	1812	860e50.bin.exe	76
PID 1812 wrote to memory of 712	1812	860e50.bin.exe	76
PID 1812 wrote to memory of 3256	1812	860e50.bin.exe	78
PID 1812 wrote to memory of 3256	1812	860e50.bin.exe	78
PID 1812 wrote to memory of 3256	1812	860e50.bin.exe	78
PID 712 wrote to memory of 2792	712	net.exe	80
PID 712 wrote to memory of 2792	712	net.exe	80
PID 712 wrote to memory of 2792	712	net.exe	80
PID 3256 wrote to memory of 192	3256	net.exe	81
PID 3256 wrote to memory of 192	3256	net.exe	81
PID 3256 wrote to memory of 192	3256	net.exe	81
PID 1812 wrote to memory of 2412	1812	860e50.bin.exe	31
PID 1812 wrote to memory of 3212	1812	860e50.bin.exe	14
PID 1812 wrote to memory of 3232	1812	860e50.bin.exe	22
PID 1812 wrote to memory of 3436	1812	860e50.bin.exe	21
PID 1812 wrote to memory of 3680	1812	860e50.bin.exe	20
PID 1812 wrote to memory of 3860	1812	860e50.bin.exe	74
PID 3596 wrote to memory of 3192	3596	dqlkEIY.exe	84
PID 3596 wrote to memory of 3192	3596	dqlkEIY.exe	84
PID 3596 wrote to memory of 3192	3596	dqlkEIY.exe	84
PID 3596 wrote to memory of 1152	3596	dqlkEIY.exe	86
PID 3596 wrote to memory of 1152	3596	dqlkEIY.exe	86
PID 3596 wrote to memory of 1152	3596	dqlkEIY.exe	86
PID 3596 wrote to memory of 1240	3596	dqlkEIY.exe	88
PID 3596 wrote to memory of 1240	3596	dqlkEIY.exe	88
PID 3596 wrote to memory of 1240	3596	dqlkEIY.exe	88
PID 3596 wrote to memory of 1980	3596	dqlkEIY.exe	90
PID 3596 wrote to memory of 1980	3596	dqlkEIY.exe	90
PID 3596 wrote to memory of 1980	3596	dqlkEIY.exe	90
PID 3596 wrote to memory of 3052	3596	dqlkEIY.exe	92
PID 3596 wrote to memory of 3052	3596	dqlkEIY.exe	92
PID 3596 wrote to memory of 3052	3596	dqlkEIY.exe	92
PID 1240 wrote to memory of 3928	1240	cmd.exe	94
PID 1240 wrote to memory of 3928	1240	cmd.exe	94
PID 1240 wrote to memory of 3928	1240	cmd.exe	94
PID 3052 wrote to memory of 3044	3052	net.exe	96
PID 3052 wrote to memory of 3044	3052	net.exe	96
PID 3052 wrote to memory of 3044	3052	net.exe	96
PID 1812 wrote to memory of 2844	1812	860e50.bin.exe	98
PID 1812 wrote to memory of 2844	1812	860e50.bin.exe	98
PID 1812 wrote to memory of 2844	1812	860e50.bin.exe	98
PID 1812 wrote to memory of 1584	1812	860e50.bin.exe	108
PID 1812 wrote to memory of 1584	1812	860e50.bin.exe	108
PID 1812 wrote to memory of 1584	1812	860e50.bin.exe	108
PID 1812 wrote to memory of 1148	1812	860e50.bin.exe	100
PID 1812 wrote to memory of 1148	1812	860e50.bin.exe	100
PID 1812 wrote to memory of 1148	1812	860e50.bin.exe	100
PID 1812 wrote to memory of 3880	1812	860e50.bin.exe	104
PID 1812 wrote to memory of 3880	1812	860e50.bin.exe	104
PID 1812 wrote to memory of 3880	1812	860e50.bin.exe	104
PID 1812 wrote to memory of 1132	1812	860e50.bin.exe	102
PID 1812 wrote to memory of 1132	1812	860e50.bin.exe	102
PID 1812 wrote to memory of 1132	1812	860e50.bin.exe	102
PID 1812 wrote to memory of 2164	1812	860e50.bin.exe	105
PID 1812 wrote to memory of 2164	1812	860e50.bin.exe	105
PID 1812 wrote to memory of 2164	1812	860e50.bin.exe	105
PID 2164 wrote to memory of 4164	2164	net.exe	111
PID 2164 wrote to memory of 4164	2164	net.exe	111

C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe
"C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe" -ServerName:App.AppXtk181tbxbce2qsex02s8tw7hfxa9xb3t.mca
1⤵
PID:3212

C:\Windows\system32\DllHost.exe
C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
1⤵
PID:3680

C:\Windows\System32\RuntimeBroker.exe
C:\Windows\System32\RuntimeBroker.exe -Embedding
1⤵
PID:3436

C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe
"C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe" -ServerName:CortanaUI.AppXa50dqqa5gqv4a428c9y1jjw7m3btvepj.mca
1⤵
PID:3232

c:\windows\system32\taskhostw.exe
taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
1⤵
PID:2412

c:\windows\system32\svchost.exe
c:\windows\system32\svchost.exe -k unistacksvcgroup -s CDPUserSvc
1⤵
PID:2308

c:\windows\system32\sihost.exe
sihost.exe
1⤵
PID:2300

C:\Users\Admin\AppData\Local\Temp\860e50.bin.exe
"C:\Users\Admin\AppData\Local\Temp\860e50.bin.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1812
- C:\Users\Admin\AppData\Local\Temp\dqlkEIY.exe
  "C:\Users\Admin\AppData\Local\Temp\dqlkEIY.exe" 8 LAN
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3596
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\*" /grant Everyone:F /T /C /Q
    3⤵
    - Modifies file permissions
    PID:3192
- - C:\Windows\SysWOW64\icacls.exe
    icacls "D:\*" /grant Everyone:F /T /C /Q
    3⤵
    - Modifies file permissions
    PID:1152
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c "WMIC.exe shadowcopy delet"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1240
  - - C:\Windows\SysWOW64\Wbem\WMIC.exe
      WMIC.exe shadowcopy delet
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:3928
- - C:\Windows\SysWOW64\vssadmin.exe
    vssadmin.exe Delete Shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:1980
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3052
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:3044
- - 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\dqlkEIY.exe" /f /reg:64
    3⤵
    PID:7456
  - - 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\dqlkEIY.exe" /f /reg:64
      4⤵
      PID:7560
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    PID:14496
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:14592
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    PID:46648
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:46776
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:712
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:2792
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3256
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:192
- C:\Windows\SysWOW64\icacls.exe
  icacls "C:\*" /grant Everyone:F /T /C /Q
  2⤵
  - Modifies file permissions
  PID:2844
- C:\Windows\SysWOW64\cmd.exe
  cmd /c "WMIC.exe shadowcopy delet"
  2⤵
  PID:1148
- - C:\Windows\SysWOW64\Wbem\WMIC.exe
    WMIC.exe shadowcopy delet
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:4612
- 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\860e50.bin.exe" /f /reg:64
  2⤵
  PID:1132
- - 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\860e50.bin.exe" /f /reg:64
    3⤵
    - Adds Run key to start application
    PID:4624
- C:\Windows\SysWOW64\vssadmin.exe
  vssadmin.exe Delete Shadows /all /quiet
  2⤵
  - Interacts with shadow copies
  PID:3880
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2164
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:4164
- C:\Windows\SysWOW64\icacls.exe
  icacls "D:\*" /grant Everyone:F /T /C /Q
  2⤵
  - Modifies file permissions
  PID:1584
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:13328
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:13432
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:15800
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:16408
- C:\Windows\SysWOW64\taskkill.exe
  "C:\Windows\System32\taskkill.exe" /IM powerpnt.exe /F
  2⤵
  - Kills process with taskkill
  PID:44520
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:44824
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:45112
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:49480
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:50040

C:\Windows\system32\DllHost.exe
C:\Windows\system32\DllHost.exe /Processid:{AB8902B4-09CA-4BB6-B78D-A8F59079A8D5}
1⤵
PID:3860

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4036

C:\Program Files\Microsoft Office\Root\Office16\POWERPNT.EXE
"C:\Program Files\Microsoft Office\Root\Office16\POWERPNT.EXE" /n "C:\Users\Admin\Desktop\MergeConnect.potx"
1⤵
PID:16988

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

File Deletion

T1107

File and Directory Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery

T1490

Replay Monitor

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Downloads

memory/1812-5-0x00000000030F0000-0x00000000030F1000-memory.dmp

Filesize
4KB

Download
memory/1812-6-0x00000000038F0000-0x00000000038F1000-memory.dmp

Filesize
4KB

Download
memory/3596-16-0x0000000002BB0000-0x0000000002BB1000-memory.dmp

Filesize
4KB

Download
memory/3596-15-0x00000000023B0000-0x00000000023B1000-memory.dmp

Filesize
4KB

Download
memory/16988-99-0x00007FF8A2B20000-0x00007FF8A2B30000-memory.dmp

Filesize
64KB

Download
memory/16988-100-0x00007FF8A2B20000-0x00007FF8A2B30000-memory.dmp

Filesize
64KB

Download
memory/16988-101-0x00007FF8A2B20000-0x00007FF8A2B30000-memory.dmp

Filesize
64KB

Download
memory/16988-102-0x00007FF8A2B20000-0x00007FF8A2B30000-memory.dmp

Filesize
64KB

Download
memory/16988-103-0x00007FF8C6B80000-0x00007FF8C71B7000-memory.dmp

Filesize
6.2MB

Download