chaos | c3f0bfffe865e3b8de9cb96dada72c743bec39626010d9ebe926c9d326b56fdc

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
25-06-2024 11:12

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General

Target

c3f0bfffe865e3b8de9cb96dada72c743bec39626010d9ebe926c9d326b56fdc.bin.exe
Size

147KB
MD5

b12ba245044aebefd213e83d96bbe30e
SHA1

13dd3338a25156109ba6957d05d5639d8e12d275
SHA256

c3f0bfffe865e3b8de9cb96dada72c743bec39626010d9ebe926c9d326b56fdc
SHA512

e7865415f12621d4a327ba2d7741a6f9354a758c2d7727d081e4b2787e9d01b971f8c4693dd7540f982a15de668f9596e25f13900d7d6fb5de04be199ec4d682
SSDEEP

3072:5o8RI41lgr9x+panT9OmELeyWGccgdkguuZ/0t9Fk20Jh2cLkZDqlkya2:DI4gr9x+SxOxWndwuZ/0nFDKLR8

Score

10^/10

chaos defense_evasion evasion execution impact ransomware spyware stealer

Malware Config

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 3 IoCs

resource	yara_rule
behavioral1/memory/1716-1-0x00000000003F0000-0x000000000041C000-memory.dmp	family_chaos
behavioral1/files/0x000e00000000f845-5.dat	family_chaos
behavioral1/memory/3064-8-0x00000000003E0000-0x000000000040C000-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
1108	bcdedit.exe
1456	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
1624	wbadmin.exe

Drops startup file 3 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\MR99.url	MR99.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini	MR99.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\說明it.txt	MR99.exe

Executes dropped EXE 1 IoCs

pid	Process
3064	MR99.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\Internet Explorer\Quick Launch\desktop.ini	MR99.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	MR99.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	MR99.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	MR99.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-3691908287-3775019229-3534252667-1000\desktop.ini	MR99.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	MR99.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	MR99.exe
File opened for modification	C:\Users\Admin\Favorites\Links for United States\desktop.ini	MR99.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	MR99.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	MR99.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	MR99.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	MR99.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	MR99.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	MR99.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	MR99.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	MR99.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	MR99.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	MR99.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	MR99.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	MR99.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	MR99.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	MR99.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	MR99.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	MR99.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	MR99.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	MR99.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	MR99.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini	MR99.exe
File opened for modification	C:\Users\Public\Music\Sample Music\desktop.ini	MR99.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	MR99.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	MR99.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	MR99.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini	MR99.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	MR99.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-1-5-21-3691908287-3775019229-3534252667-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\boe7ay46n.jpg"	MR99.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
1552	vssadmin.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
3064	MR99.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1716	c3f0bfffe865e3b8de9cb96dada72c743bec39626010d9ebe926c9d326b56fdc.bin.exe
1716	c3f0bfffe865e3b8de9cb96dada72c743bec39626010d9ebe926c9d326b56fdc.bin.exe
3064	MR99.exe
3064	MR99.exe
3064	MR99.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	1716	c3f0bfffe865e3b8de9cb96dada72c743bec39626010d9ebe926c9d326b56fdc.bin.exe
Token: SeDebugPrivilege	3064	MR99.exe
Token: SeBackupPrivilege	2020	vssvc.exe
Token: SeRestorePrivilege	2020	vssvc.exe
Token: SeAuditPrivilege	2020	vssvc.exe
Token: SeIncreaseQuotaPrivilege	308	WMIC.exe
Token: SeSecurityPrivilege	308	WMIC.exe
Token: SeTakeOwnershipPrivilege	308	WMIC.exe
Token: SeLoadDriverPrivilege	308	WMIC.exe
Token: SeSystemProfilePrivilege	308	WMIC.exe
Token: SeSystemtimePrivilege	308	WMIC.exe
Token: SeProfSingleProcessPrivilege	308	WMIC.exe
Token: SeIncBasePriorityPrivilege	308	WMIC.exe
Token: SeCreatePagefilePrivilege	308	WMIC.exe
Token: SeBackupPrivilege	308	WMIC.exe
Token: SeRestorePrivilege	308	WMIC.exe
Token: SeShutdownPrivilege	308	WMIC.exe
Token: SeDebugPrivilege	308	WMIC.exe
Token: SeSystemEnvironmentPrivilege	308	WMIC.exe
Token: SeRemoteShutdownPrivilege	308	WMIC.exe
Token: SeUndockPrivilege	308	WMIC.exe
Token: SeManageVolumePrivilege	308	WMIC.exe
Token: 33	308	WMIC.exe
Token: 34	308	WMIC.exe
Token: 35	308	WMIC.exe
Token: SeIncreaseQuotaPrivilege	308	WMIC.exe
Token: SeSecurityPrivilege	308	WMIC.exe
Token: SeTakeOwnershipPrivilege	308	WMIC.exe
Token: SeLoadDriverPrivilege	308	WMIC.exe
Token: SeSystemProfilePrivilege	308	WMIC.exe
Token: SeSystemtimePrivilege	308	WMIC.exe
Token: SeProfSingleProcessPrivilege	308	WMIC.exe
Token: SeIncBasePriorityPrivilege	308	WMIC.exe
Token: SeCreatePagefilePrivilege	308	WMIC.exe
Token: SeBackupPrivilege	308	WMIC.exe
Token: SeRestorePrivilege	308	WMIC.exe
Token: SeShutdownPrivilege	308	WMIC.exe
Token: SeDebugPrivilege	308	WMIC.exe
Token: SeSystemEnvironmentPrivilege	308	WMIC.exe
Token: SeRemoteShutdownPrivilege	308	WMIC.exe
Token: SeUndockPrivilege	308	WMIC.exe
Token: SeManageVolumePrivilege	308	WMIC.exe
Token: 33	308	WMIC.exe
Token: 34	308	WMIC.exe
Token: 35	308	WMIC.exe
Token: SeBackupPrivilege	2936	wbengine.exe
Token: SeRestorePrivilege	2936	wbengine.exe
Token: SeSecurityPrivilege	2936	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1716 wrote to memory of 3064	1716	c3f0bfffe865e3b8de9cb96dada72c743bec39626010d9ebe926c9d326b56fdc.bin.exe	28
PID 1716 wrote to memory of 3064	1716	c3f0bfffe865e3b8de9cb96dada72c743bec39626010d9ebe926c9d326b56fdc.bin.exe	28
PID 1716 wrote to memory of 3064	1716	c3f0bfffe865e3b8de9cb96dada72c743bec39626010d9ebe926c9d326b56fdc.bin.exe	28
PID 3064 wrote to memory of 2836	3064	MR99.exe	30
PID 3064 wrote to memory of 2836	3064	MR99.exe	30
PID 3064 wrote to memory of 2836	3064	MR99.exe	30
PID 2836 wrote to memory of 1552	2836	cmd.exe	32
PID 2836 wrote to memory of 1552	2836	cmd.exe	32
PID 2836 wrote to memory of 1552	2836	cmd.exe	32
PID 2836 wrote to memory of 308	2836	cmd.exe	35
PID 2836 wrote to memory of 308	2836	cmd.exe	35
PID 2836 wrote to memory of 308	2836	cmd.exe	35
PID 3064 wrote to memory of 3012	3064	MR99.exe	37
PID 3064 wrote to memory of 3012	3064	MR99.exe	37
PID 3064 wrote to memory of 3012	3064	MR99.exe	37
PID 3012 wrote to memory of 1108	3012	cmd.exe	39
PID 3012 wrote to memory of 1108	3012	cmd.exe	39
PID 3012 wrote to memory of 1108	3012	cmd.exe	39
PID 3012 wrote to memory of 1456	3012	cmd.exe	40
PID 3012 wrote to memory of 1456	3012	cmd.exe	40
PID 3012 wrote to memory of 1456	3012	cmd.exe	40
PID 3064 wrote to memory of 2932	3064	MR99.exe	41
PID 3064 wrote to memory of 2932	3064	MR99.exe	41
PID 3064 wrote to memory of 2932	3064	MR99.exe	41
PID 2932 wrote to memory of 1624	2932	cmd.exe	43
PID 2932 wrote to memory of 1624	2932	cmd.exe	43
PID 2932 wrote to memory of 1624	2932	cmd.exe	43
PID 3064 wrote to memory of 1752	3064	MR99.exe	47
PID 3064 wrote to memory of 1752	3064	MR99.exe	47
PID 3064 wrote to memory of 1752	3064	MR99.exe	47

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\c3f0bfffe865e3b8de9cb96dada72c743bec39626010d9ebe926c9d326b56fdc.bin.exe
"C:\Users\Admin\AppData\Local\Temp\c3f0bfffe865e3b8de9cb96dada72c743bec39626010d9ebe926c9d326b56fdc.bin.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1716
- C:\Users\Admin\AppData\Roaming\MR99.exe
  "C:\Users\Admin\AppData\Roaming\MR99.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:3064
- - 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:2836
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:1552
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:308
- - 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:3012
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1108
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1456
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2932
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1624
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\說明it.txt
    3⤵
    PID:1752

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2020

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2936

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:564

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1788

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\MR99.exe

Filesize
147KB

MD5
b12ba245044aebefd213e83d96bbe30e

SHA1
13dd3338a25156109ba6957d05d5639d8e12d275

SHA256
c3f0bfffe865e3b8de9cb96dada72c743bec39626010d9ebe926c9d326b56fdc

SHA512
e7865415f12621d4a327ba2d7741a6f9354a758c2d7727d081e4b2787e9d01b971f8c4693dd7540f982a15de668f9596e25f13900d7d6fb5de04be199ec4d682

Download Submit
C:\Users\Admin\Documents\說明it.txt

Filesize
1KB

MD5
49a1cf89d0ddde160c817935eae02483

SHA1
bbf29e7ea8188b5521b4b8dbce8b4646da1a2ec3

SHA256
d5a3af795396ed83d7eb1df9331359b8c48b99fd36bff734561b9dab2b059517

SHA512
9df03064707ca9bed52d8f3fc05940d25696d2711ba5fd21cbd6e217cb857d97847b958e67a1adb37aad84948baf1edc60f2f15a1711d128b4a4dd432ffd47a3

Download Submit
memory/1716-0-0x000007FEF5B73000-0x000007FEF5B74000-memory.dmp

Filesize
4KB

Download
memory/1716-1-0x00000000003F0000-0x000000000041C000-memory.dmp

Filesize
176KB

Download
memory/3064-7-0x000007FEF5183000-0x000007FEF5184000-memory.dmp

Filesize
4KB

Download
memory/3064-8-0x00000000003E0000-0x000000000040C000-memory.dmp

Filesize
176KB

Download
memory/3064-22-0x000007FEF5180000-0x000007FEF5B6C000-memory.dmp

Filesize
9.9MB

Download
memory/3064-466-0x000007FEF5183000-0x000007FEF5184000-memory.dmp

Filesize
4KB

Download
memory/3064-467-0x000007FEF5180000-0x000007FEF5B6C000-memory.dmp

Filesize
9.9MB

Download