ryuk | 4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a

Analysis

max time kernel
195s
max time network
214s
platform
windows10-2004_x64
resource
win10v2004-en-20220113
submitted
20-02-2022 07:41

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General

Target

4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe
Size

190KB
MD5

727cf4d00df34f36c4767f1ab185244a
SHA1

983331a93a5c91cb3ffee97495eef475d43f3f52
SHA256

4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a
SHA512

ff3e67d7b2d6196ab574d1f1157a4c3190e91f539d363c547b1a2cfe6e0dcf86d59a267dc226d0dfc5766ed82d01a9e782bc5ecfaed7eda433c2ede6199cd0e0

Score

10^/10

ryuk discovery 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\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
4060	evsKwSI.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	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation	evsKwSI.exe

Modifies file permissions 1 TTPs 4 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2300	icacls.exe
1900	icacls.exe
1732	icacls.exe
1568	icacls.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 16 IoCs

pid	Process
4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe
4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe
4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe
4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe
4060	evsKwSI.exe
4060	evsKwSI.exe
4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe
4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe
4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe
4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe
4060	evsKwSI.exe
4060	evsKwSI.exe
4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe
4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe
4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe
4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeBackupPrivilege	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe
Token: SeBackupPrivilege	4060	evsKwSI.exe
Token: SeIncreaseQuotaPrivilege	3388	WMIC.exe
Token: SeSecurityPrivilege	3388	WMIC.exe
Token: SeTakeOwnershipPrivilege	3388	WMIC.exe
Token: SeLoadDriverPrivilege	3388	WMIC.exe
Token: SeSystemProfilePrivilege	3388	WMIC.exe
Token: SeSystemtimePrivilege	3388	WMIC.exe
Token: SeProfSingleProcessPrivilege	3388	WMIC.exe
Token: SeIncBasePriorityPrivilege	3388	WMIC.exe
Token: SeCreatePagefilePrivilege	3388	WMIC.exe
Token: SeBackupPrivilege	3388	WMIC.exe
Token: SeRestorePrivilege	3388	WMIC.exe
Token: SeShutdownPrivilege	3388	WMIC.exe
Token: SeDebugPrivilege	3388	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3388	WMIC.exe
Token: SeRemoteShutdownPrivilege	3388	WMIC.exe
Token: SeUndockPrivilege	3388	WMIC.exe
Token: SeManageVolumePrivilege	3388	WMIC.exe
Token: 33	3388	WMIC.exe
Token: 34	3388	WMIC.exe
Token: 35	3388	WMIC.exe
Token: 36	3388	WMIC.exe
Token: SeIncreaseQuotaPrivilege	3676	WMIC.exe
Token: SeSecurityPrivilege	3676	WMIC.exe
Token: SeTakeOwnershipPrivilege	3676	WMIC.exe
Token: SeLoadDriverPrivilege	3676	WMIC.exe
Token: SeSystemProfilePrivilege	3676	WMIC.exe
Token: SeSystemtimePrivilege	3676	WMIC.exe
Token: SeProfSingleProcessPrivilege	3676	WMIC.exe
Token: SeIncBasePriorityPrivilege	3676	WMIC.exe
Token: SeCreatePagefilePrivilege	3676	WMIC.exe
Token: SeBackupPrivilege	3676	WMIC.exe
Token: SeRestorePrivilege	3676	WMIC.exe
Token: SeShutdownPrivilege	3676	WMIC.exe
Token: SeDebugPrivilege	3676	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3676	WMIC.exe
Token: SeRemoteShutdownPrivilege	3676	WMIC.exe
Token: SeUndockPrivilege	3676	WMIC.exe
Token: SeManageVolumePrivilege	3676	WMIC.exe
Token: 33	3676	WMIC.exe
Token: 34	3676	WMIC.exe
Token: 35	3676	WMIC.exe
Token: 36	3676	WMIC.exe
Token: SeIncreaseQuotaPrivilege	3388	WMIC.exe
Token: SeSecurityPrivilege	3388	WMIC.exe
Token: SeTakeOwnershipPrivilege	3388	WMIC.exe
Token: SeLoadDriverPrivilege	3388	WMIC.exe
Token: SeSystemProfilePrivilege	3388	WMIC.exe
Token: SeSystemtimePrivilege	3388	WMIC.exe
Token: SeProfSingleProcessPrivilege	3388	WMIC.exe
Token: SeIncBasePriorityPrivilege	3388	WMIC.exe
Token: SeCreatePagefilePrivilege	3388	WMIC.exe
Token: SeBackupPrivilege	3388	WMIC.exe
Token: SeRestorePrivilege	3388	WMIC.exe
Token: SeShutdownPrivilege	3388	WMIC.exe
Token: SeDebugPrivilege	3388	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3388	WMIC.exe
Token: SeRemoteShutdownPrivilege	3388	WMIC.exe
Token: SeUndockPrivilege	3388	WMIC.exe
Token: SeManageVolumePrivilege	3388	WMIC.exe
Token: 33	3388	WMIC.exe
Token: 34	3388	WMIC.exe
Token: 35	3388	WMIC.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 4556 wrote to memory of 4060	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe	86
PID 4556 wrote to memory of 4060	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe	86
PID 4556 wrote to memory of 4060	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe	86
PID 4556 wrote to memory of 1288	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe	87
PID 4556 wrote to memory of 1288	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe	87
PID 4556 wrote to memory of 1288	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe	87
PID 1288 wrote to memory of 1348	1288	net.exe	89
PID 1288 wrote to memory of 1348	1288	net.exe	89
PID 1288 wrote to memory of 1348	1288	net.exe	89
PID 4556 wrote to memory of 4760	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe	90
PID 4556 wrote to memory of 4760	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe	90
PID 4556 wrote to memory of 4760	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe	90
PID 4760 wrote to memory of 1552	4760	net.exe	92
PID 4760 wrote to memory of 1552	4760	net.exe	92
PID 4760 wrote to memory of 1552	4760	net.exe	92
PID 4556 wrote to memory of 1568	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe	99
PID 4556 wrote to memory of 1568	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe	99
PID 4556 wrote to memory of 1568	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe	99
PID 4060 wrote to memory of 2300	4060	evsKwSI.exe	93
PID 4060 wrote to memory of 2300	4060	evsKwSI.exe	93
PID 4060 wrote to memory of 2300	4060	evsKwSI.exe	93
PID 4060 wrote to memory of 1732	4060	evsKwSI.exe	98
PID 4060 wrote to memory of 1732	4060	evsKwSI.exe	98
PID 4060 wrote to memory of 1732	4060	evsKwSI.exe	98
PID 4556 wrote to memory of 1900	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe	94
PID 4556 wrote to memory of 1900	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe	94
PID 4556 wrote to memory of 1900	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe	94
PID 4556 wrote to memory of 2232	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe	102
PID 4556 wrote to memory of 2232	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe	102
PID 4556 wrote to memory of 2232	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe	102
PID 4060 wrote to memory of 3112	4060	evsKwSI.exe	101
PID 4060 wrote to memory of 3112	4060	evsKwSI.exe	101
PID 4060 wrote to memory of 3112	4060	evsKwSI.exe	101
PID 4556 wrote to memory of 5092	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe	105
PID 4556 wrote to memory of 5092	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe	105
PID 4556 wrote to memory of 5092	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe	105
PID 5092 wrote to memory of 3476	5092	net.exe	107
PID 5092 wrote to memory of 3476	5092	net.exe	107
PID 5092 wrote to memory of 3476	5092	net.exe	107
PID 4556 wrote to memory of 4488	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe	108
PID 4556 wrote to memory of 4488	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe	108
PID 4556 wrote to memory of 4488	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe	108
PID 4488 wrote to memory of 4316	4488	net.exe	110
PID 4488 wrote to memory of 4316	4488	net.exe	110
PID 4488 wrote to memory of 4316	4488	net.exe	110
PID 4060 wrote to memory of 1444	4060	evsKwSI.exe	111
PID 4060 wrote to memory of 1444	4060	evsKwSI.exe	111
PID 4060 wrote to memory of 1444	4060	evsKwSI.exe	111
PID 1444 wrote to memory of 1472	1444	net.exe	113
PID 1444 wrote to memory of 1472	1444	net.exe	113
PID 1444 wrote to memory of 1472	1444	net.exe	113
PID 3112 wrote to memory of 3388	3112	cmd.exe	114
PID 3112 wrote to memory of 3388	3112	cmd.exe	114
PID 3112 wrote to memory of 3388	3112	cmd.exe	114
PID 4060 wrote to memory of 1440	4060	evsKwSI.exe	116
PID 4060 wrote to memory of 1440	4060	evsKwSI.exe	116
PID 4060 wrote to memory of 1440	4060	evsKwSI.exe	116
PID 2232 wrote to memory of 3676	2232	cmd.exe	115
PID 2232 wrote to memory of 3676	2232	cmd.exe	115
PID 2232 wrote to memory of 3676	2232	cmd.exe	115
PID 1440 wrote to memory of 436	1440	net.exe	118
PID 1440 wrote to memory of 436	1440	net.exe	118
PID 1440 wrote to memory of 436	1440	net.exe	118
PID 4556 wrote to memory of 5688	4556	4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe	121

C:\Users\Admin\AppData\Local\Temp\4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe
"C:\Users\Admin\AppData\Local\Temp\4a602ad6542e5bbf428f15cd236bad78265bc18f0275340d0ececd5f2d81db9a.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4556
- C:\Users\Admin\AppData\Local\Temp\evsKwSI.exe
  "C:\Users\Admin\AppData\Local\Temp\evsKwSI.exe" 8 LAN
  2⤵
  - Executes dropped EXE
  - Checks computer location settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4060
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\*" /grant Everyone:F /T /C /Q
    3⤵
    - Modifies file permissions
    PID:2300
- - C:\Windows\SysWOW64\icacls.exe
    icacls "D:\*" /grant Everyone:F /T /C /Q
    3⤵
    - Modifies file permissions
    PID:1732
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c "WMIC.exe shadowcopy delet"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3112
  - - C:\Windows\SysWOW64\Wbem\WMIC.exe
      WMIC.exe shadowcopy delet
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:3388
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1444
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "audioendpointbuilder" /y
      4⤵
      PID:1472
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1440
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:436
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    PID:6044
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:11368
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1288
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:1348
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4760
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:1552
- C:\Windows\SysWOW64\icacls.exe
  icacls "D:\*" /grant Everyone:F /T /C /Q
  2⤵
  - Modifies file permissions
  PID:1900
- C:\Windows\SysWOW64\icacls.exe
  icacls "C:\*" /grant Everyone:F /T /C /Q
  2⤵
  - Modifies file permissions
  PID:1568
- C:\Windows\SysWOW64\cmd.exe
  cmd /c "WMIC.exe shadowcopy delet"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2232
- - C:\Windows\SysWOW64\Wbem\WMIC.exe
    WMIC.exe shadowcopy delet
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:3676
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:5092
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:3476
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4488
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:4316
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:5688
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:5788
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:5680
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:5796
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:11652
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:11752
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:11688
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:11776

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
PID:5624

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

T1222

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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