chaos | 438764714bb650393cdeba7bfa9e0ba039cd566fc35e4565dc2855d1e086f16d

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
12-08-2024 00:22

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General

Target

438764714bb650393cdeba7bfa9e0ba039cd566fc35e4565dc2855d1e086f16d.exe
Size

32KB
MD5

aec65cd697c52926d76f888c0f1958b2
SHA1

603b2537703cfc6c4addf8ef1480ce33601f6117
SHA256

438764714bb650393cdeba7bfa9e0ba039cd566fc35e4565dc2855d1e086f16d
SHA512

c1a5d23b5cd9b378a6031c6ca1bfe65da424bb60c9e404401ca139eee1a3e6f78fc1bae1f38e493ccd3fcaa7b905b6caab2a36d19648acf76e63874df48278a4
SSDEEP

384:h3MLWHn3kI9a0JI8ITMpypoGroX3Jxr91CppZkM5hEM5eF:hn3kItJInTMpxMs5xr9OpZkM5hE2eF

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/2104-1-0x0000000001090000-0x000000000109E000-memory.dmp	family_chaos
behavioral1/files/0x0008000000017041-4.dat	family_chaos
behavioral1/memory/620-7-0x00000000008F0000-0x00000000008FE000-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
2916	bcdedit.exe
2444	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
2920	wbadmin.exe

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\read_it.txt	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
620	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 for United States\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\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\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Searches\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\Documents\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\Internet Explorer\Quick Launch\User Pinned\TaskBar\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\Public\Desktop\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\Recent\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	svchost.exe
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\Public\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\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\Windows\Start Menu\Programs\Accessories\System Tools\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\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\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\Start Menu\Programs\Accessories\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\Public\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-3294248377-1418901787-4083263181-1000\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	svchost.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
2620	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
288	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
620	svchost.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2104	438764714bb650393cdeba7bfa9e0ba039cd566fc35e4565dc2855d1e086f16d.exe
2104	438764714bb650393cdeba7bfa9e0ba039cd566fc35e4565dc2855d1e086f16d.exe
2104	438764714bb650393cdeba7bfa9e0ba039cd566fc35e4565dc2855d1e086f16d.exe
620	svchost.exe
620	svchost.exe
620	svchost.exe
620	svchost.exe
620	svchost.exe
620	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2104	438764714bb650393cdeba7bfa9e0ba039cd566fc35e4565dc2855d1e086f16d.exe
Token: SeDebugPrivilege	620	svchost.exe
Token: SeBackupPrivilege	2580	vssvc.exe
Token: SeRestorePrivilege	2580	vssvc.exe
Token: SeAuditPrivilege	2580	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1748	WMIC.exe
Token: SeSecurityPrivilege	1748	WMIC.exe
Token: SeTakeOwnershipPrivilege	1748	WMIC.exe
Token: SeLoadDriverPrivilege	1748	WMIC.exe
Token: SeSystemProfilePrivilege	1748	WMIC.exe
Token: SeSystemtimePrivilege	1748	WMIC.exe
Token: SeProfSingleProcessPrivilege	1748	WMIC.exe
Token: SeIncBasePriorityPrivilege	1748	WMIC.exe
Token: SeCreatePagefilePrivilege	1748	WMIC.exe
Token: SeBackupPrivilege	1748	WMIC.exe
Token: SeRestorePrivilege	1748	WMIC.exe
Token: SeShutdownPrivilege	1748	WMIC.exe
Token: SeDebugPrivilege	1748	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1748	WMIC.exe
Token: SeRemoteShutdownPrivilege	1748	WMIC.exe
Token: SeUndockPrivilege	1748	WMIC.exe
Token: SeManageVolumePrivilege	1748	WMIC.exe
Token: 33	1748	WMIC.exe
Token: 34	1748	WMIC.exe
Token: 35	1748	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1748	WMIC.exe
Token: SeSecurityPrivilege	1748	WMIC.exe
Token: SeTakeOwnershipPrivilege	1748	WMIC.exe
Token: SeLoadDriverPrivilege	1748	WMIC.exe
Token: SeSystemProfilePrivilege	1748	WMIC.exe
Token: SeSystemtimePrivilege	1748	WMIC.exe
Token: SeProfSingleProcessPrivilege	1748	WMIC.exe
Token: SeIncBasePriorityPrivilege	1748	WMIC.exe
Token: SeCreatePagefilePrivilege	1748	WMIC.exe
Token: SeBackupPrivilege	1748	WMIC.exe
Token: SeRestorePrivilege	1748	WMIC.exe
Token: SeShutdownPrivilege	1748	WMIC.exe
Token: SeDebugPrivilege	1748	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1748	WMIC.exe
Token: SeRemoteShutdownPrivilege	1748	WMIC.exe
Token: SeUndockPrivilege	1748	WMIC.exe
Token: SeManageVolumePrivilege	1748	WMIC.exe
Token: 33	1748	WMIC.exe
Token: 34	1748	WMIC.exe
Token: 35	1748	WMIC.exe
Token: SeBackupPrivilege	1528	wbengine.exe
Token: SeRestorePrivilege	1528	wbengine.exe
Token: SeSecurityPrivilege	1528	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2104 wrote to memory of 620	2104	438764714bb650393cdeba7bfa9e0ba039cd566fc35e4565dc2855d1e086f16d.exe	31
PID 2104 wrote to memory of 620	2104	438764714bb650393cdeba7bfa9e0ba039cd566fc35e4565dc2855d1e086f16d.exe	31
PID 2104 wrote to memory of 620	2104	438764714bb650393cdeba7bfa9e0ba039cd566fc35e4565dc2855d1e086f16d.exe	31
PID 620 wrote to memory of 2704	620	svchost.exe	32
PID 620 wrote to memory of 2704	620	svchost.exe	32
PID 620 wrote to memory of 2704	620	svchost.exe	32
PID 2704 wrote to memory of 2620	2704	cmd.exe	34
PID 2704 wrote to memory of 2620	2704	cmd.exe	34
PID 2704 wrote to memory of 2620	2704	cmd.exe	34
PID 2704 wrote to memory of 1748	2704	cmd.exe	38
PID 2704 wrote to memory of 1748	2704	cmd.exe	38
PID 2704 wrote to memory of 1748	2704	cmd.exe	38
PID 620 wrote to memory of 2664	620	svchost.exe	40
PID 620 wrote to memory of 2664	620	svchost.exe	40
PID 620 wrote to memory of 2664	620	svchost.exe	40
PID 2664 wrote to memory of 2916	2664	cmd.exe	42
PID 2664 wrote to memory of 2916	2664	cmd.exe	42
PID 2664 wrote to memory of 2916	2664	cmd.exe	42
PID 2664 wrote to memory of 2444	2664	cmd.exe	43
PID 2664 wrote to memory of 2444	2664	cmd.exe	43
PID 2664 wrote to memory of 2444	2664	cmd.exe	43
PID 620 wrote to memory of 2416	620	svchost.exe	44
PID 620 wrote to memory of 2416	620	svchost.exe	44
PID 620 wrote to memory of 2416	620	svchost.exe	44
PID 2416 wrote to memory of 2920	2416	cmd.exe	46
PID 2416 wrote to memory of 2920	2416	cmd.exe	46
PID 2416 wrote to memory of 2920	2416	cmd.exe	46
PID 620 wrote to memory of 288	620	svchost.exe	50
PID 620 wrote to memory of 288	620	svchost.exe	50
PID 620 wrote to memory of 288	620	svchost.exe	50

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\438764714bb650393cdeba7bfa9e0ba039cd566fc35e4565dc2855d1e086f16d.exe
"C:\Users\Admin\AppData\Local\Temp\438764714bb650393cdeba7bfa9e0ba039cd566fc35e4565dc2855d1e086f16d.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2104
- 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)
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:620
- - 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:2704
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2620
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1748
- - 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:2664
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2916
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2444
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2416
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:2920
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:288

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2580

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1528

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2228

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:2804

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

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

Inhibit System Recovery

T1490

Replay Monitor

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Downloads

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

Filesize
32KB

MD5
aec65cd697c52926d76f888c0f1958b2

SHA1
603b2537703cfc6c4addf8ef1480ce33601f6117

SHA256
438764714bb650393cdeba7bfa9e0ba039cd566fc35e4565dc2855d1e086f16d

SHA512
c1a5d23b5cd9b378a6031c6ca1bfe65da424bb60c9e404401ca139eee1a3e6f78fc1bae1f38e493ccd3fcaa7b905b6caab2a36d19648acf76e63874df48278a4

Download Submit
C:\Users\Admin\Desktop\read_it.txt

Filesize
6KB

MD5
fd2a0bdc9a576617d725d35784a6a824

SHA1
d08aed0fe2d1ace2a1bb466fb90826fc1e8d8e3b

SHA256
22ae9851e674f1b329ce25601e242406886c9000f51823ecddea9ec1b9276918

SHA512
20ebf1c2e225644b6a9577c9a07bb8e06edaf93729f8bc472b004b79a6b19f5c5d45b6f4f3a36d86a9354bf360b27ed118cba76596dcbe915c8ba28897ac6e77

Download Submit
memory/620-7-0x00000000008F0000-0x00000000008FE000-memory.dmp

Filesize
56KB

Download
memory/620-9-0x000007FEF5900000-0x000007FEF62EC000-memory.dmp

Filesize
9.9MB

Download
memory/620-73-0x000007FEF5900000-0x000007FEF62EC000-memory.dmp

Filesize
9.9MB

Download
memory/620-74-0x000007FEF5900000-0x000007FEF62EC000-memory.dmp

Filesize
9.9MB

Download
memory/620-75-0x000007FEF5900000-0x000007FEF62EC000-memory.dmp

Filesize
9.9MB

Download
memory/2104-0-0x000007FEF5903000-0x000007FEF5904000-memory.dmp

Filesize
4KB

Download
memory/2104-1-0x0000000001090000-0x000000000109E000-memory.dmp

Filesize
56KB

Download