chaos | 0ef2768bdfaa0b953a5c498f18bbf2df5dce249eaf2044474c476c4367c535b5

Analysis

max time kernel
31s
max time network
16s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
08-08-2024 14:59

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General

Target

FridayBoycrazyV2.exe
Size

280KB
MD5

41e34a8240026b4e9cd8d81a73ee8b2c
SHA1

3876b12e152dd552a7059538242b6f87a23e60f5
SHA256

0ef2768bdfaa0b953a5c498f18bbf2df5dce249eaf2044474c476c4367c535b5
SHA512

a7d610ee4f116121757f47193bf092b639cf2d439dcfa364ea800c28c0f21996fd8baa31c9abe68d2c18cc8f334c57f9d71c4e444a04a27d3b9cab90eecbba73
SSDEEP

6144:1r93iyJ7/+WZT1kRnSeXSX9MNzxiMwP2OswK:iyJ7/+Wd1kRnFX4mNzxyeOswK

Score

10^/10

chaos defense_evasion evasion execution impact ransomware spyware stealer

Malware Config

Extracted

Path

C:\Users\Admin\Documents\Warning.txt

Ransom Note

Your files has been encrypted By FridayBoycrazy and you won't be able to decrypt them without our help What can I do to get my files back You can buy our special decryption software, this software will allow you to recover all of your data and remove the ransomware from your computer The price for the software is $100 Dollars can be made in Venmo Or Robux only Please Contact Us At Gmail: [email protected] Discord Username: fridayboycrazy Payment information Venmo Amount: $100 Robux Payment Information: 10,000 Paid Ransom: https://www.roblox.com/game-pass/887175972 Paid Ransom: https://venmo.com/u/gratefulcode

Emails

[email protected]

URLs

https://www.roblox.com/game-pass/887175972

https://venmo.com/u/gratefulcode

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 3 IoCs

resource	yara_rule
behavioral1/memory/2260-1-0x0000000001350000-0x000000000139C000-memory.dmp	family_chaos
behavioral1/files/0x0005000000004ed7-5.dat	family_chaos
behavioral1/memory/2028-7-0x0000000000820000-0x000000000086C000-memory.dmp	family_chaos

Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware defense_evasion impact execution

File Deletion
T1070.004

Inhibit System Recovery
T1490

Windows Management Instrumentation
T1047

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
1608	bcdedit.exe
3020	bcdedit.exe

Deletes backup catalog 3 TTPs 1 IoCs

Uses wbadmin.exe to inhibit system recovery.

ransomware

Command and Scripting Interpreter

T1059

File Deletion

T1070.004

Inhibit System Recovery

T1490

pid	Process
2184	wbadmin.exe

Drops startup file 3 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Warning.txt	FridayBoycrazy.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\FridayBoycrazy.url	FridayBoycrazy.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini	FridayBoycrazy.exe

Executes dropped EXE 1 IoCs

pid	Process
2028	FridayBoycrazy.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\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Public\Music\Sample Music\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	FridayBoycrazy.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-2172136094-3310281978-782691160-1000\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Admin\Favorites\Links for United States\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	FridayBoycrazy.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	FridayBoycrazy.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-1-5-21-2172136094-3310281978-782691160-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\38lc588w8.jpg"	FridayBoycrazy.exe

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

System Information Discovery
T1082

Interacts with shadow copies 3 TTPs 1 IoCs

Shadow copies are often targeted by ransomware to inhibit system recovery.

ransomware

File Deletion

T1070.004

Inhibit System Recovery

T1490

Direct Volume Access

T1006

pid	Process
1036	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1264	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2028	FridayBoycrazy.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2260	FridayBoycrazyV2.exe
2028	FridayBoycrazy.exe
2028	FridayBoycrazy.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2260	FridayBoycrazyV2.exe
Token: SeDebugPrivilege	2028	FridayBoycrazy.exe
Token: SeBackupPrivilege	2284	vssvc.exe
Token: SeRestorePrivilege	2284	vssvc.exe
Token: SeAuditPrivilege	2284	vssvc.exe
Token: SeIncreaseQuotaPrivilege	2544	WMIC.exe
Token: SeSecurityPrivilege	2544	WMIC.exe
Token: SeTakeOwnershipPrivilege	2544	WMIC.exe
Token: SeLoadDriverPrivilege	2544	WMIC.exe
Token: SeSystemProfilePrivilege	2544	WMIC.exe
Token: SeSystemtimePrivilege	2544	WMIC.exe
Token: SeProfSingleProcessPrivilege	2544	WMIC.exe
Token: SeIncBasePriorityPrivilege	2544	WMIC.exe
Token: SeCreatePagefilePrivilege	2544	WMIC.exe
Token: SeBackupPrivilege	2544	WMIC.exe
Token: SeRestorePrivilege	2544	WMIC.exe
Token: SeShutdownPrivilege	2544	WMIC.exe
Token: SeDebugPrivilege	2544	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2544	WMIC.exe
Token: SeRemoteShutdownPrivilege	2544	WMIC.exe
Token: SeUndockPrivilege	2544	WMIC.exe
Token: SeManageVolumePrivilege	2544	WMIC.exe
Token: 33	2544	WMIC.exe
Token: 34	2544	WMIC.exe
Token: 35	2544	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2544	WMIC.exe
Token: SeSecurityPrivilege	2544	WMIC.exe
Token: SeTakeOwnershipPrivilege	2544	WMIC.exe
Token: SeLoadDriverPrivilege	2544	WMIC.exe
Token: SeSystemProfilePrivilege	2544	WMIC.exe
Token: SeSystemtimePrivilege	2544	WMIC.exe
Token: SeProfSingleProcessPrivilege	2544	WMIC.exe
Token: SeIncBasePriorityPrivilege	2544	WMIC.exe
Token: SeCreatePagefilePrivilege	2544	WMIC.exe
Token: SeBackupPrivilege	2544	WMIC.exe
Token: SeRestorePrivilege	2544	WMIC.exe
Token: SeShutdownPrivilege	2544	WMIC.exe
Token: SeDebugPrivilege	2544	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2544	WMIC.exe
Token: SeRemoteShutdownPrivilege	2544	WMIC.exe
Token: SeUndockPrivilege	2544	WMIC.exe
Token: SeManageVolumePrivilege	2544	WMIC.exe
Token: 33	2544	WMIC.exe
Token: 34	2544	WMIC.exe
Token: 35	2544	WMIC.exe
Token: SeBackupPrivilege	2404	wbengine.exe
Token: SeRestorePrivilege	2404	wbengine.exe
Token: SeSecurityPrivilege	2404	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2260 wrote to memory of 2028	2260	FridayBoycrazyV2.exe	29
PID 2260 wrote to memory of 2028	2260	FridayBoycrazyV2.exe	29
PID 2260 wrote to memory of 2028	2260	FridayBoycrazyV2.exe	29
PID 2028 wrote to memory of 2848	2028	FridayBoycrazy.exe	31
PID 2028 wrote to memory of 2848	2028	FridayBoycrazy.exe	31
PID 2028 wrote to memory of 2848	2028	FridayBoycrazy.exe	31
PID 2848 wrote to memory of 1036	2848	cmd.exe	33
PID 2848 wrote to memory of 1036	2848	cmd.exe	33
PID 2848 wrote to memory of 1036	2848	cmd.exe	33
PID 2848 wrote to memory of 2544	2848	cmd.exe	36
PID 2848 wrote to memory of 2544	2848	cmd.exe	36
PID 2848 wrote to memory of 2544	2848	cmd.exe	36
PID 2028 wrote to memory of 2436	2028	FridayBoycrazy.exe	38
PID 2028 wrote to memory of 2436	2028	FridayBoycrazy.exe	38
PID 2028 wrote to memory of 2436	2028	FridayBoycrazy.exe	38
PID 2436 wrote to memory of 1608	2436	cmd.exe	40
PID 2436 wrote to memory of 1608	2436	cmd.exe	40
PID 2436 wrote to memory of 1608	2436	cmd.exe	40
PID 2436 wrote to memory of 3020	2436	cmd.exe	41
PID 2436 wrote to memory of 3020	2436	cmd.exe	41
PID 2436 wrote to memory of 3020	2436	cmd.exe	41
PID 2028 wrote to memory of 2900	2028	FridayBoycrazy.exe	42
PID 2028 wrote to memory of 2900	2028	FridayBoycrazy.exe	42
PID 2028 wrote to memory of 2900	2028	FridayBoycrazy.exe	42
PID 2900 wrote to memory of 2184	2900	cmd.exe	44
PID 2900 wrote to memory of 2184	2900	cmd.exe	44
PID 2900 wrote to memory of 2184	2900	cmd.exe	44
PID 2028 wrote to memory of 1264	2028	FridayBoycrazy.exe	48
PID 2028 wrote to memory of 1264	2028	FridayBoycrazy.exe	48
PID 2028 wrote to memory of 1264	2028	FridayBoycrazy.exe	48

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Users\Admin\AppData\Local\Temp\FridayBoycrazyV2.exe
"C:\Users\Admin\AppData\Local\Temp\FridayBoycrazyV2.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2260
- C:\Users\Admin\AppData\Roaming\FridayBoycrazy.exe
  "C:\Users\Admin\AppData\Roaming\FridayBoycrazy.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:2028
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2848
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:1036
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2544
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2436
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1608
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:3020
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2900
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:2184
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\Warning.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:1264

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2284

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2404

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2064

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:920

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Management Instrumentation

T1047

Persistence

Privilege Escalation

Defense Evasion

Direct Volume Access

T1006

Indicator Removal

T1070

File Deletion

T1070.004

Modify Registry

T1112

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Defacement

T1491

Inhibit System Recovery

T1490

Replay Monitor

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Downloads

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

Filesize
280KB

MD5
41e34a8240026b4e9cd8d81a73ee8b2c

SHA1
3876b12e152dd552a7059538242b6f87a23e60f5

SHA256
0ef2768bdfaa0b953a5c498f18bbf2df5dce249eaf2044474c476c4367c535b5

SHA512
a7d610ee4f116121757f47193bf092b639cf2d439dcfa364ea800c28c0f21996fd8baa31c9abe68d2c18cc8f334c57f9d71c4e444a04a27d3b9cab90eecbba73

Download Submit
C:\Users\Admin\Documents\Warning.txt

Filesize
642B

MD5
072e26ca8a9c9502061d1c3d9e3bbeaa

SHA1
fe55bffddd0d415c293e8e926d302e3586212322

SHA256
f7b22500b7a82a9446b635353aceecbdc205c9208eeb72c2e2c1b6d0a9a1bd62

SHA512
2bc83902a56df2a3178c3b59ad8014a08b282e60289123a10d9a4d643a604876e008e782a6c861bfd211580a5fdbb1bcf748c3197210d71dc18d8949c62d4610

Download Submit
memory/2028-7-0x0000000000820000-0x000000000086C000-memory.dmp

Filesize
304KB

Download
memory/2028-12-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

Filesize
9.9MB

Download
memory/2028-26-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

Filesize
9.9MB

Download
memory/2028-488-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

Filesize
9.9MB

Download
memory/2260-0-0x000007FEF5EA3000-0x000007FEF5EA4000-memory.dmp

Filesize
4KB

Download
memory/2260-1-0x0000000001350000-0x000000000139C000-memory.dmp

Filesize
304KB

Download