ryuk | 8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2

Analysis

max time kernel
188s
max time network
148s
platform
windows7_x64
resource
win7-en-20211208
submitted
20-02-2022 05:08

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General

Target

8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe
Size

187KB
MD5

2ee9a7ce3356c032d49c1947761c63b2
SHA1

30181311c46b89cc3e01d3d8207c4c533199fa88
SHA256

8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2
SHA512

d2e8c140e5935ab0761283c8f85a0f9881129a0f131e51d1d4e1257d47874be9326437bac33c1f921eff3f0658b0147f026492083e47d8bea6b50ddc9873afd2

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
760	KgJNfBI.exe

Loads dropped DLL 2 IoCs

pid	Process
1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe
1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.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 8 IoCs

pid	Process
1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe
1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe
760	KgJNfBI.exe
1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe
1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe
760	KgJNfBI.exe
1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe
1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeBackupPrivilege	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe
Token: SeBackupPrivilege	760	KgJNfBI.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1916 wrote to memory of 760	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	27
PID 1916 wrote to memory of 760	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	27
PID 1916 wrote to memory of 760	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	27
PID 1916 wrote to memory of 760	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	27
PID 1916 wrote to memory of 240	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	28
PID 1916 wrote to memory of 240	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	28
PID 1916 wrote to memory of 240	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	28
PID 1916 wrote to memory of 240	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	28
PID 240 wrote to memory of 1092	240	net.exe	30
PID 240 wrote to memory of 1092	240	net.exe	30
PID 240 wrote to memory of 1092	240	net.exe	30
PID 240 wrote to memory of 1092	240	net.exe	30
PID 1916 wrote to memory of 1860	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	31
PID 1916 wrote to memory of 1860	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	31
PID 1916 wrote to memory of 1860	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	31
PID 1916 wrote to memory of 1860	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	31
PID 1860 wrote to memory of 364	1860	net.exe	33
PID 1860 wrote to memory of 364	1860	net.exe	33
PID 1860 wrote to memory of 364	1860	net.exe	33
PID 1860 wrote to memory of 364	1860	net.exe	33
PID 1916 wrote to memory of 1116	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	34
PID 1916 wrote to memory of 1116	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	34
PID 1916 wrote to memory of 1116	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	34
PID 1916 wrote to memory of 1116	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	34
PID 1116 wrote to memory of 1608	1116	net.exe	36
PID 1116 wrote to memory of 1608	1116	net.exe	36
PID 1116 wrote to memory of 1608	1116	net.exe	36
PID 1116 wrote to memory of 1608	1116	net.exe	36
PID 1916 wrote to memory of 896	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	37
PID 1916 wrote to memory of 896	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	37
PID 1916 wrote to memory of 896	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	37
PID 1916 wrote to memory of 896	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	37
PID 896 wrote to memory of 2188	896	net.exe	39
PID 896 wrote to memory of 2188	896	net.exe	39
PID 896 wrote to memory of 2188	896	net.exe	39
PID 896 wrote to memory of 2188	896	net.exe	39
PID 760 wrote to memory of 5532	760	KgJNfBI.exe	40
PID 760 wrote to memory of 5532	760	KgJNfBI.exe	40
PID 760 wrote to memory of 5532	760	KgJNfBI.exe	40
PID 760 wrote to memory of 5532	760	KgJNfBI.exe	40
PID 5532 wrote to memory of 5556	5532	net.exe	42
PID 5532 wrote to memory of 5556	5532	net.exe	42
PID 5532 wrote to memory of 5556	5532	net.exe	42
PID 5532 wrote to memory of 5556	5532	net.exe	42
PID 1916 wrote to memory of 16864	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	46
PID 1916 wrote to memory of 16864	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	46
PID 1916 wrote to memory of 16864	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	46
PID 1916 wrote to memory of 16864	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	46
PID 16864 wrote to memory of 16888	16864	net.exe	48
PID 16864 wrote to memory of 16888	16864	net.exe	48
PID 16864 wrote to memory of 16888	16864	net.exe	48
PID 16864 wrote to memory of 16888	16864	net.exe	48
PID 1916 wrote to memory of 16904	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	49
PID 1916 wrote to memory of 16904	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	49
PID 1916 wrote to memory of 16904	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	49
PID 1916 wrote to memory of 16904	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	49
PID 16904 wrote to memory of 16928	16904	net.exe	51
PID 16904 wrote to memory of 16928	16904	net.exe	51
PID 16904 wrote to memory of 16928	16904	net.exe	51
PID 16904 wrote to memory of 16928	16904	net.exe	51
PID 1916 wrote to memory of 16996	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	52
PID 1916 wrote to memory of 16996	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	52
PID 1916 wrote to memory of 16996	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	52
PID 1916 wrote to memory of 16996	1916	8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe	52

C:\Users\Admin\AppData\Local\Temp\8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe
"C:\Users\Admin\AppData\Local\Temp\8366f63d37f8cefda19657c49000b662c4dde38463517c34168b33bf427db5d2.exe"
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1916
- C:\Users\Admin\AppData\Local\Temp\KgJNfBI.exe
  "C:\Users\Admin\AppData\Local\Temp\KgJNfBI.exe" 8 LAN
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:760
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:5532
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:5556
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    PID:17080
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:17104
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:240
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:1092
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1860
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:364
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1116
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:1608
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:896
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:2188
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:16864
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:16888
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:16904
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:16928
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:16996
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:17020
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:17036
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:17064

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/1916-54-0x0000000076041000-0x0000000076043000-memory.dmp

Filesize
8KB

Download