ryuk | a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10

Analysis

max time kernel
162s
max time network
36s
platform
windows7_x64
resource
win7-en-20211208
submitted
20-02-2022 03:52

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe
Size

202KB
MD5

fd1f7a77ea9efd1f2e291c031f441c74
SHA1

c5fdb9dc74560446c9404e01ce176b02899e89e4
SHA256

a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10
SHA512

b4d93fbde71c50f62bedd5ff4d1c81ad7e925ea4bed0df3bf562cdf97b60691ae6d668f9f45615de5eaf8ef2e28dea9a28b197146857223b3d2d9a0c9d436282

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> [email protected] </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:\Documents and Settings\Admin\AppData\Local\Adobe\Color\RyukReadMe.html

Family

ryuk

Ransom Note

[email protected] [email protected] balance of shadow universe Ryuk

Emails

[email protected]

Signatures

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

pid	Process
744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe
744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe
1120	taskhost.exe
744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe
744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe
1120	taskhost.exe
744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe
744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe
1120	taskhost.exe
744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe
Token: SeBackupPrivilege	1120	taskhost.exe
Token: SeBackupPrivilege	744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 744 wrote to memory of 1120	744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe	8
PID 744 wrote to memory of 1180	744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe	7
PID 744 wrote to memory of 764	744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe	27
PID 744 wrote to memory of 764	744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe	27
PID 744 wrote to memory of 764	744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe	27
PID 744 wrote to memory of 1116	744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe	30
PID 744 wrote to memory of 1116	744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe	30
PID 744 wrote to memory of 1116	744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe	30
PID 1116 wrote to memory of 1868	1116	net.exe	32
PID 1116 wrote to memory of 1868	1116	net.exe	32
PID 1116 wrote to memory of 1868	1116	net.exe	32
PID 764 wrote to memory of 1832	764	net.exe	31
PID 764 wrote to memory of 1832	764	net.exe	31
PID 764 wrote to memory of 1832	764	net.exe	31
PID 1120 wrote to memory of 1992	1120	taskhost.exe	33
PID 1120 wrote to memory of 1992	1120	taskhost.exe	33
PID 1120 wrote to memory of 1992	1120	taskhost.exe	33
PID 1992 wrote to memory of 1804	1992	net.exe	35
PID 1992 wrote to memory of 1804	1992	net.exe	35
PID 1992 wrote to memory of 1804	1992	net.exe	35
PID 1120 wrote to memory of 1724	1120	taskhost.exe	36
PID 1120 wrote to memory of 1724	1120	taskhost.exe	36
PID 1120 wrote to memory of 1724	1120	taskhost.exe	36
PID 1724 wrote to memory of 1496	1724	net.exe	38
PID 1724 wrote to memory of 1496	1724	net.exe	38
PID 1724 wrote to memory of 1496	1724	net.exe	38
PID 744 wrote to memory of 472	744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe	39
PID 744 wrote to memory of 472	744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe	39
PID 744 wrote to memory of 472	744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe	39
PID 472 wrote to memory of 2120	472	net.exe	41
PID 472 wrote to memory of 2120	472	net.exe	41
PID 472 wrote to memory of 2120	472	net.exe	41
PID 744 wrote to memory of 31420	744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe	45
PID 744 wrote to memory of 31420	744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe	45
PID 744 wrote to memory of 31420	744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe	45
PID 31420 wrote to memory of 31444	31420	net.exe	47
PID 31420 wrote to memory of 31444	31420	net.exe	47
PID 31420 wrote to memory of 31444	31420	net.exe	47
PID 1120 wrote to memory of 31456	1120	taskhost.exe	48
PID 1120 wrote to memory of 31456	1120	taskhost.exe	48
PID 1120 wrote to memory of 31456	1120	taskhost.exe	48
PID 31456 wrote to memory of 31480	31456	net.exe	50
PID 31456 wrote to memory of 31480	31456	net.exe	50
PID 31456 wrote to memory of 31480	31456	net.exe	50
PID 744 wrote to memory of 31492	744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe	51
PID 744 wrote to memory of 31492	744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe	51
PID 744 wrote to memory of 31492	744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe	51
PID 31492 wrote to memory of 31516	31492	net.exe	53
PID 31492 wrote to memory of 31516	31492	net.exe	53
PID 31492 wrote to memory of 31516	31492	net.exe	53
PID 744 wrote to memory of 19496	744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe	54
PID 744 wrote to memory of 19496	744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe	54
PID 744 wrote to memory of 19496	744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe	54
PID 19496 wrote to memory of 1672	19496	net.exe	56
PID 19496 wrote to memory of 1672	19496	net.exe	56
PID 19496 wrote to memory of 1672	19496	net.exe	56
PID 1120 wrote to memory of 31448	1120	taskhost.exe	57
PID 1120 wrote to memory of 31448	1120	taskhost.exe	57
PID 1120 wrote to memory of 31448	1120	taskhost.exe	57
PID 31448 wrote to memory of 31428	31448	net.exe	59
PID 31448 wrote to memory of 31428	31448	net.exe	59
PID 31448 wrote to memory of 31428	31448	net.exe	59
PID 744 wrote to memory of 868	744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe	60
PID 744 wrote to memory of 868	744	a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe	60

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1180

C:\Windows\system32\taskhost.exe
"taskhost.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1120
- C:\Windows\System32\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1992
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:1804
- C:\Windows\System32\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1724
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:1496
- C:\Windows\System32\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:31456
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:31480
- C:\Windows\System32\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:31448
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:31428

C:\Users\Admin\AppData\Local\Temp\a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe
"C:\Users\Admin\AppData\Local\Temp\a1c2e6660cff8d87a924ed0079f94374d04602433014c46ae6c52700c45ddc10.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:744
- C:\Windows\System32\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:764
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:1832
- C:\Windows\System32\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1116
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:1868
- C:\Windows\System32\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:472
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:2120
- C:\Windows\System32\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:31420
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:31444
- C:\Windows\System32\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:31492
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:31516
- C:\Windows\System32\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:19496
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:1672
- C:\Windows\System32\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:868
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:31460

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

Loading Replay Monitor...

Downloads

memory/744-55-0x000007FEFBAD1000-0x000007FEFBAD3000-memory.dmp

Filesize
8KB

Download
memory/1120-57-0x000000013F500000-0x000000013F7DA000-memory.dmp

Filesize
2.9MB

Download
memory/1120-54-0x000000013F500000-0x000000013F7DA000-memory.dmp

Filesize
2.9MB

Download
memory/1180-58-0x000000013F500000-0x000000013F7DA000-memory.dmp

Filesize
2.9MB

Download