ryuk | d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849

Analysis

max time kernel
177s
max time network
144s
platform
windows7_x64
resource
win7-en-20211208
submitted
20-02-2022 01:56

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General

Target

d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
Size

193KB
MD5

12147c94f3211733f893d31d587d4ad6
SHA1

708199a9a86894f464ec5a5d607ffb1093c096f4
SHA256

d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849
SHA512

3ef68160f44d16e3a305899d537773fdaace5ae6534eb185f3741bc2917f84457674a8bd1ad7db0c4b707a308f101cb3d49f7906bde7732dd26ed08cf9f6b1af

Score

10^/10

ryuk 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
1096	ehIwdrF.exe

Loads dropped DLL 2 IoCs

pid	Process
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.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 39 IoCs

pid	Process
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
1096	ehIwdrF.exe
1096	ehIwdrF.exe
1096	ehIwdrF.exe
1096	ehIwdrF.exe
1096	ehIwdrF.exe
1096	ehIwdrF.exe
1096	ehIwdrF.exe
1096	ehIwdrF.exe
1096	ehIwdrF.exe
1096	ehIwdrF.exe
1096	ehIwdrF.exe
1096	ehIwdrF.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
1096	ehIwdrF.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeBackupPrivilege	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
Token: SeBackupPrivilege	1096	ehIwdrF.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 956 wrote to memory of 1096	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	27
PID 956 wrote to memory of 1096	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	27
PID 956 wrote to memory of 1096	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	27
PID 956 wrote to memory of 1096	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	27
PID 956 wrote to memory of 2576	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	30
PID 956 wrote to memory of 2576	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	30
PID 956 wrote to memory of 2576	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	30
PID 956 wrote to memory of 2576	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	30
PID 956 wrote to memory of 2568	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	29
PID 956 wrote to memory of 2568	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	29
PID 956 wrote to memory of 2568	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	29
PID 956 wrote to memory of 2568	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	29
PID 1096 wrote to memory of 2628	1096	ehIwdrF.exe	33
PID 1096 wrote to memory of 2628	1096	ehIwdrF.exe	33
PID 1096 wrote to memory of 2628	1096	ehIwdrF.exe	33
PID 1096 wrote to memory of 2628	1096	ehIwdrF.exe	33
PID 1096 wrote to memory of 2712	1096	ehIwdrF.exe	35
PID 1096 wrote to memory of 2712	1096	ehIwdrF.exe	35
PID 1096 wrote to memory of 2712	1096	ehIwdrF.exe	35
PID 1096 wrote to memory of 2712	1096	ehIwdrF.exe	35
PID 956 wrote to memory of 2732	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	37
PID 956 wrote to memory of 2732	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	37
PID 956 wrote to memory of 2732	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	37
PID 956 wrote to memory of 2732	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	37
PID 956 wrote to memory of 2740	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	38
PID 956 wrote to memory of 2740	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	38
PID 956 wrote to memory of 2740	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	38
PID 956 wrote to memory of 2740	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	38
PID 2576 wrote to memory of 2944	2576	net.exe	45
PID 2576 wrote to memory of 2944	2576	net.exe	45
PID 2576 wrote to memory of 2944	2576	net.exe	45
PID 2576 wrote to memory of 2944	2576	net.exe	45
PID 2732 wrote to memory of 2936	2732	net.exe	46
PID 2732 wrote to memory of 2936	2732	net.exe	46
PID 2732 wrote to memory of 2936	2732	net.exe	46
PID 2732 wrote to memory of 2936	2732	net.exe	46
PID 2740 wrote to memory of 2928	2740	net.exe	43
PID 2740 wrote to memory of 2928	2740	net.exe	43
PID 2740 wrote to memory of 2928	2740	net.exe	43
PID 2740 wrote to memory of 2928	2740	net.exe	43
PID 2712 wrote to memory of 2960	2712	net.exe	42
PID 2712 wrote to memory of 2960	2712	net.exe	42
PID 2712 wrote to memory of 2960	2712	net.exe	42
PID 2712 wrote to memory of 2960	2712	net.exe	42
PID 2628 wrote to memory of 2968	2628	net.exe	44
PID 2628 wrote to memory of 2968	2628	net.exe	44
PID 2628 wrote to memory of 2968	2628	net.exe	44
PID 2628 wrote to memory of 2968	2628	net.exe	44
PID 2568 wrote to memory of 2952	2568	net.exe	47
PID 2568 wrote to memory of 2952	2568	net.exe	47
PID 2568 wrote to memory of 2952	2568	net.exe	47
PID 2568 wrote to memory of 2952	2568	net.exe	47
PID 956 wrote to memory of 36324	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	48
PID 956 wrote to memory of 36324	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	48
PID 956 wrote to memory of 36324	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	48
PID 956 wrote to memory of 36324	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	48
PID 956 wrote to memory of 36684	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	49
PID 956 wrote to memory of 36684	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	49
PID 956 wrote to memory of 36684	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	49
PID 956 wrote to memory of 36684	956	d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe	49
PID 36684 wrote to memory of 36272	36684	net.exe	53
PID 36684 wrote to memory of 36272	36684	net.exe	53
PID 36684 wrote to memory of 36272	36684	net.exe	53
PID 36684 wrote to memory of 36272	36684	net.exe	53

C:\Users\Admin\AppData\Local\Temp\d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe
"C:\Users\Admin\AppData\Local\Temp\d7b324dfead641207c85cb18cdfc00bbfd37932f27f41c3af441d6912f235849.exe"
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:956
- C:\Users\Admin\AppData\Local\Temp\ehIwdrF.exe
  "C:\Users\Admin\AppData\Local\Temp\ehIwdrF.exe" 8 LAN
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1096
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2628
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "audioendpointbuilder" /y
      4⤵
      PID:2968
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2712
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:2960
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    PID:37360
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:37384
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2568
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:2952
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2576
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:2944
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2732
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:2936
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2740
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:2928
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:36324
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:36040
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:36684
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:36272
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:37284
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:37308
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:37320
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:37348

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/956-55-0x0000000076B81000-0x0000000076B83000-memory.dmp

Filesize
8KB

Download