chaos | 279ef35a9f2748763ffa8107d1f6c3cf6d629979ea58403af6b2297f80d9eb72

Analysis

max time kernel
122s
max time network
126s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
10-03-2024 21:24

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General

Target

2024-03-10_8c6c723a4839d62780e8761b9513df5b_wannacry.exe
Size

189KB
MD5

8c6c723a4839d62780e8761b9513df5b
SHA1

3704056af3cc91c56fcca5577a60843a99732e7d
SHA256

279ef35a9f2748763ffa8107d1f6c3cf6d629979ea58403af6b2297f80d9eb72
SHA512

46360c4493ade57dc92112bc59681c0cc787fc192b132cbd8e62bdbbeeb23694c2a112ec2d6fad20e4630a92eaacfbf5444bc817e281fd7da7ff85b43737562d
SSDEEP

3072:lojUMpar9prL/txWwbPCXMoHTXdv14469I6HptMTmshOR9:hrr9pnzbPnoH36HptMphOR

Score

10^/10

chaos ransomware spyware stealer

Malware Config

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 5 IoCs

resource	yara_rule
behavioral1/memory/112-0-0x00000000001E0000-0x0000000000216000-memory.dmp	family_chaos
behavioral1/files/0x000b00000001224f-5.dat	family_chaos
behavioral1/files/0x000b00000001224f-6.dat	family_chaos
behavioral1/memory/2148-7-0x0000000000BD0000-0x0000000000C06000-memory.dmp	family_chaos
behavioral1/memory/2148-11-0x000000001B160000-0x000000001B1E0000-memory.dmp	family_chaos

Detects command variations typically used by ransomware 5 IoCs

resource	yara_rule
behavioral1/memory/112-0-0x00000000001E0000-0x0000000000216000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/files/0x000b00000001224f-5.dat	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/files/0x000b00000001224f-6.dat	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/2148-7-0x0000000000BD0000-0x0000000000C06000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/2148-11-0x000000001B160000-0x000000001B1E0000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware

Renames multiple (159) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

Drops startup file 3 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.url	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini	svchost.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\@zarik [email protected]	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2148	svchost.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Drops desktop.ini file(s) 34 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links for United States\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-1298544033-3225604241-2703760938-1000\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\Sample Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	svchost.exe

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\h9yrs2cyy.jpg"	svchost.exe

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

System Information Discovery
T1082

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2148	svchost.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
112	2024-03-10_8c6c723a4839d62780e8761b9513df5b_wannacry.exe
112	2024-03-10_8c6c723a4839d62780e8761b9513df5b_wannacry.exe
2148	svchost.exe
2148	svchost.exe
2148	svchost.exe
2148	svchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	112	2024-03-10_8c6c723a4839d62780e8761b9513df5b_wannacry.exe
Token: SeDebugPrivilege	2148	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 112 wrote to memory of 2148	112	2024-03-10_8c6c723a4839d62780e8761b9513df5b_wannacry.exe	28
PID 112 wrote to memory of 2148	112	2024-03-10_8c6c723a4839d62780e8761b9513df5b_wannacry.exe	28
PID 112 wrote to memory of 2148	112	2024-03-10_8c6c723a4839d62780e8761b9513df5b_wannacry.exe	28
PID 2148 wrote to memory of 2540	2148	svchost.exe	30
PID 2148 wrote to memory of 2540	2148	svchost.exe	30
PID 2148 wrote to memory of 2540	2148	svchost.exe	30

C:\Users\Admin\AppData\Local\Temp\2024-03-10_8c6c723a4839d62780e8761b9513df5b_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-10_8c6c723a4839d62780e8761b9513df5b_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:112
- C:\Users\Admin\AppData\Roaming\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Drops desktop.ini file(s)
  - Sets desktop wallpaper using registry
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2148
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\@zarik [email protected]
    3⤵
    PID:2540

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Defacement

T1491

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\svchost.exe

Filesize
189KB

MD5
8c6c723a4839d62780e8761b9513df5b

SHA1
3704056af3cc91c56fcca5577a60843a99732e7d

SHA256
279ef35a9f2748763ffa8107d1f6c3cf6d629979ea58403af6b2297f80d9eb72

SHA512
46360c4493ade57dc92112bc59681c0cc787fc192b132cbd8e62bdbbeeb23694c2a112ec2d6fad20e4630a92eaacfbf5444bc817e281fd7da7ff85b43737562d

Download Submit
C:\Users\Admin\AppData\Roaming\svchost.exe

Filesize
64KB

MD5
83864b4be34a0343149b9f87435e75c9

SHA1
8998f9c73c9f3304d05789357436c0322515178d

SHA256
825ca6eae58e2ce10b07204f67fbd2c0a3bc54951e8f24395c742e351c5542b6

SHA512
3e2b1cdf17bcab9ec4298d4d8950e992ba1a7fb4e2ca34cdf8247563385bb3c56059265eeee3dbce4925f13415472469b68ff27fb204580ea22ad9d3482f6d55

Download Submit
C:\Users\Admin\Documents\@zarik [email protected]

Filesize
192B

MD5
0f3192c97d96e862abdd464698ecbc9f

SHA1
d6ad1e331a8c8403159e09a16cc1ddb4b24534fb

SHA256
ae0665dbe51e1fc225ed189c55b77b33a17d2f707201abdc1fc3d587a424ba0e

SHA512
847836318b900001b2da9db34a70d8139f19132ed5d69d78c1015f24d7c5b0d4eeedae3c74717a2e24f67ec96ed68dc143dfae55db9a6773602756edac2f0aa7

Download Submit
memory/112-0-0x00000000001E0000-0x0000000000216000-memory.dmp

Filesize
216KB

Download
memory/112-1-0x000007FEF61F0000-0x000007FEF6BDC000-memory.dmp

Filesize
9.9MB

Download
memory/112-8-0x000007FEF61F0000-0x000007FEF6BDC000-memory.dmp

Filesize
9.9MB

Download
memory/2148-9-0x000007FEF61F0000-0x000007FEF6BDC000-memory.dmp

Filesize
9.9MB

Download
memory/2148-7-0x0000000000BD0000-0x0000000000C06000-memory.dmp

Filesize
216KB

Download
memory/2148-11-0x000000001B160000-0x000000001B1E0000-memory.dmp

Filesize
512KB

Download
memory/2148-383-0x000007FEF61F0000-0x000007FEF6BDC000-memory.dmp

Filesize
9.9MB

Download
memory/2148-384-0x000000001B160000-0x000000001B1E0000-memory.dmp

Filesize
512KB

Download