ryuk | aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c

Analysis

max time kernel
167s
max time network
146s
platform
windows7_x64
resource
win7-en-20211208
submitted
20/02/2022, 03:18

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General

Target

aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe
Size

191KB
MD5

856961d44f9e6775ad573cf58c438a2a
SHA1

818bbf02fd1bd0eda9ee62c73b63266bf859e699
SHA256

aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c
SHA512

d6bfb664f6a1496df539c86a9b2b2b1bf3d43e252109af2f3e9dc40b566804e0b6d8ef051f953ea998391664ce8db8ea2dc5b2b4199493082e473c9b196ebc0e

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:\Users\Admin\AppData\Local\Temp\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

Executes dropped EXE 1 IoCs

pid	Process
1072	gimaDgm.exe

Loads dropped DLL 6 IoCs

pid	Process
1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe
1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe
15876	WerFault.exe
15876	WerFault.exe
15876	WerFault.exe
15876	WerFault.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
15876	1072	WerFault.exe	27

Runs net.exe

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe
1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe
1072	gimaDgm.exe
1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe
1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe
1072	gimaDgm.exe
15876	WerFault.exe
15876	WerFault.exe
15876	WerFault.exe
15876	WerFault.exe
15876	WerFault.exe
15876	WerFault.exe
15876	WerFault.exe
15876	WerFault.exe
15876	WerFault.exe
15876	WerFault.exe
15876	WerFault.exe
15876	WerFault.exe
15876	WerFault.exe
15876	WerFault.exe
15876	WerFault.exe
15876	WerFault.exe
1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe
1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe
Token: SeBackupPrivilege	1072	gimaDgm.exe
Token: SeDebugPrivilege	15876	WerFault.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1404 wrote to memory of 1072	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	27
PID 1404 wrote to memory of 1072	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	27
PID 1404 wrote to memory of 1072	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	27
PID 1404 wrote to memory of 1072	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	27
PID 1404 wrote to memory of 2204	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	30
PID 1404 wrote to memory of 2204	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	30
PID 1404 wrote to memory of 2204	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	30
PID 1404 wrote to memory of 2204	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	30
PID 1072 wrote to memory of 2212	1072	gimaDgm.exe	28
PID 1072 wrote to memory of 2212	1072	gimaDgm.exe	28
PID 1072 wrote to memory of 2212	1072	gimaDgm.exe	28
PID 1072 wrote to memory of 2212	1072	gimaDgm.exe	28
PID 1404 wrote to memory of 2220	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	29
PID 1404 wrote to memory of 2220	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	29
PID 1404 wrote to memory of 2220	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	29
PID 1404 wrote to memory of 2220	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	29
PID 1404 wrote to memory of 2288	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	38
PID 1404 wrote to memory of 2288	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	38
PID 1404 wrote to memory of 2288	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	38
PID 1404 wrote to memory of 2288	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	38
PID 1404 wrote to memory of 2296	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	35
PID 1404 wrote to memory of 2296	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	35
PID 1404 wrote to memory of 2296	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	35
PID 1404 wrote to memory of 2296	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	35
PID 1072 wrote to memory of 2304	1072	gimaDgm.exe	34
PID 1072 wrote to memory of 2304	1072	gimaDgm.exe	34
PID 1072 wrote to memory of 2304	1072	gimaDgm.exe	34
PID 1072 wrote to memory of 2304	1072	gimaDgm.exe	34
PID 2204 wrote to memory of 2820	2204	net.exe	47
PID 2204 wrote to memory of 2820	2204	net.exe	47
PID 2204 wrote to memory of 2820	2204	net.exe	47
PID 2204 wrote to memory of 2820	2204	net.exe	47
PID 2212 wrote to memory of 2828	2212	net.exe	42
PID 2212 wrote to memory of 2828	2212	net.exe	42
PID 2212 wrote to memory of 2828	2212	net.exe	42
PID 2212 wrote to memory of 2828	2212	net.exe	42
PID 2288 wrote to memory of 2860	2288	net.exe	44
PID 2288 wrote to memory of 2860	2288	net.exe	44
PID 2288 wrote to memory of 2860	2288	net.exe	44
PID 2288 wrote to memory of 2860	2288	net.exe	44
PID 2296 wrote to memory of 2836	2296	net.exe	43
PID 2296 wrote to memory of 2836	2296	net.exe	43
PID 2296 wrote to memory of 2836	2296	net.exe	43
PID 2296 wrote to memory of 2836	2296	net.exe	43
PID 2304 wrote to memory of 2852	2304	net.exe	45
PID 2304 wrote to memory of 2852	2304	net.exe	45
PID 2304 wrote to memory of 2852	2304	net.exe	45
PID 2304 wrote to memory of 2852	2304	net.exe	45
PID 2220 wrote to memory of 2844	2220	net.exe	46
PID 2220 wrote to memory of 2844	2220	net.exe	46
PID 2220 wrote to memory of 2844	2220	net.exe	46
PID 2220 wrote to memory of 2844	2220	net.exe	46
PID 1072 wrote to memory of 15876	1072	gimaDgm.exe	48
PID 1072 wrote to memory of 15876	1072	gimaDgm.exe	48
PID 1072 wrote to memory of 15876	1072	gimaDgm.exe	48
PID 1072 wrote to memory of 15876	1072	gimaDgm.exe	48
PID 1404 wrote to memory of 15952	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	50
PID 1404 wrote to memory of 15952	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	50
PID 1404 wrote to memory of 15952	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	50
PID 1404 wrote to memory of 15952	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	50
PID 1404 wrote to memory of 15960	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	49
PID 1404 wrote to memory of 15960	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	49
PID 1404 wrote to memory of 15960	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	49
PID 1404 wrote to memory of 15960	1404	aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe	49

C:\Users\Admin\AppData\Local\Temp\aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe
"C:\Users\Admin\AppData\Local\Temp\aebfcf161ae2086459aa9ca99cbab2c2118a6d617fe645d65c148c5d3436de5c.exe"
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1404
- C:\Users\Admin\AppData\Local\Temp\gimaDgm.exe
  "C:\Users\Admin\AppData\Local\Temp\gimaDgm.exe" 8 LAN
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1072
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2212
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "audioendpointbuilder" /y
      4⤵
      PID:2828
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2304
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:2852
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1072 -s 17052
    3⤵
    - Loads dropped DLL
    - Program crash
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:15876
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2220
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:2844
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2204
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:2820
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2296
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:2836
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2288
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:2860
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:15960
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:16008
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:15952
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:16000
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:20872
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:20920
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:20880
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:20928

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/1404-55-0x0000000075F81000-0x0000000075F83000-memory.dmp

Filesize
8KB

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