chaos | 897be7be189a1e444c44535b7dd1f967ff7eb49bec25367efcbed724c76efffb

Analysis

max time kernel
120s
max time network
124s
platform
windows7_x64
resource
win7-20240611-en
resource tags

arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
submitted
30-06-2024 23:55

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General

Target

897be7be189a1e444c44535b7dd1f967ff7eb49bec25367efcbed724c76efffb.exe
Size

22KB
MD5

f086fab4e2d6de8255df5a06e0983f4a
SHA1

501c65650b6815fd837f64ce398ff4d8382475e5
SHA256

897be7be189a1e444c44535b7dd1f967ff7eb49bec25367efcbed724c76efffb
SHA512

9c9ef27dc35f684a0d55f3202887a06ae8cb956e154795802034b9add97dbf5faf337680acb6fa96f3f2250cbe5f4f90caa47d9d43e550368b2b3d0403a40a53
SSDEEP

384:e3Mg/bqo2v4Ahp2XTpFZ3OjvJsr91CSYvEe5:cqo2FaDpjOjBsr9W8e5

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/2652-1-0x0000000001350000-0x000000000135C000-memory.dmp	family_chaos
behavioral1/files/0x000c00000001224e-5.dat	family_chaos
behavioral1/memory/2596-7-0x00000000009B0000-0x00000000009BC000-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

Detects command variations typically used by ransomware 3 IoCs

resource	yara_rule
behavioral1/memory/2652-1-0x0000000001350000-0x000000000135C000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/files/0x000c00000001224e-5.dat	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/2596-7-0x00000000009B0000-0x00000000009BC000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
1060	bcdedit.exe
2180	bcdedit.exe

Renames multiple (187) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

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
864	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_ME.txt	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2596	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\Videos\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\Public\Documents\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\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\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\Searches\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	F:\$RECYCLE.BIN\S-1-5-21-1340930862-1405011213-2821322012-1000\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\Accessories\Accessibility\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\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links\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\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\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\Internet Explorer\Quick Launch\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\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\Start Menu\Programs\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\Pictures\Sample Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\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

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
2952	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1940	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2596	svchost.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2652	897be7be189a1e444c44535b7dd1f967ff7eb49bec25367efcbed724c76efffb.exe
2652	897be7be189a1e444c44535b7dd1f967ff7eb49bec25367efcbed724c76efffb.exe
2596	svchost.exe
2596	svchost.exe
2596	svchost.exe
2596	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2652	897be7be189a1e444c44535b7dd1f967ff7eb49bec25367efcbed724c76efffb.exe
Token: SeDebugPrivilege	2596	svchost.exe
Token: SeBackupPrivilege	2644	vssvc.exe
Token: SeRestorePrivilege	2644	vssvc.exe
Token: SeAuditPrivilege	2644	vssvc.exe
Token: SeIncreaseQuotaPrivilege	892	WMIC.exe
Token: SeSecurityPrivilege	892	WMIC.exe
Token: SeTakeOwnershipPrivilege	892	WMIC.exe
Token: SeLoadDriverPrivilege	892	WMIC.exe
Token: SeSystemProfilePrivilege	892	WMIC.exe
Token: SeSystemtimePrivilege	892	WMIC.exe
Token: SeProfSingleProcessPrivilege	892	WMIC.exe
Token: SeIncBasePriorityPrivilege	892	WMIC.exe
Token: SeCreatePagefilePrivilege	892	WMIC.exe
Token: SeBackupPrivilege	892	WMIC.exe
Token: SeRestorePrivilege	892	WMIC.exe
Token: SeShutdownPrivilege	892	WMIC.exe
Token: SeDebugPrivilege	892	WMIC.exe
Token: SeSystemEnvironmentPrivilege	892	WMIC.exe
Token: SeRemoteShutdownPrivilege	892	WMIC.exe
Token: SeUndockPrivilege	892	WMIC.exe
Token: SeManageVolumePrivilege	892	WMIC.exe
Token: 33	892	WMIC.exe
Token: 34	892	WMIC.exe
Token: 35	892	WMIC.exe
Token: SeIncreaseQuotaPrivilege	892	WMIC.exe
Token: SeSecurityPrivilege	892	WMIC.exe
Token: SeTakeOwnershipPrivilege	892	WMIC.exe
Token: SeLoadDriverPrivilege	892	WMIC.exe
Token: SeSystemProfilePrivilege	892	WMIC.exe
Token: SeSystemtimePrivilege	892	WMIC.exe
Token: SeProfSingleProcessPrivilege	892	WMIC.exe
Token: SeIncBasePriorityPrivilege	892	WMIC.exe
Token: SeCreatePagefilePrivilege	892	WMIC.exe
Token: SeBackupPrivilege	892	WMIC.exe
Token: SeRestorePrivilege	892	WMIC.exe
Token: SeShutdownPrivilege	892	WMIC.exe
Token: SeDebugPrivilege	892	WMIC.exe
Token: SeSystemEnvironmentPrivilege	892	WMIC.exe
Token: SeRemoteShutdownPrivilege	892	WMIC.exe
Token: SeUndockPrivilege	892	WMIC.exe
Token: SeManageVolumePrivilege	892	WMIC.exe
Token: 33	892	WMIC.exe
Token: 34	892	WMIC.exe
Token: 35	892	WMIC.exe
Token: SeBackupPrivilege	1600	wbengine.exe
Token: SeRestorePrivilege	1600	wbengine.exe
Token: SeSecurityPrivilege	1600	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2652 wrote to memory of 2596	2652	897be7be189a1e444c44535b7dd1f967ff7eb49bec25367efcbed724c76efffb.exe	28
PID 2652 wrote to memory of 2596	2652	897be7be189a1e444c44535b7dd1f967ff7eb49bec25367efcbed724c76efffb.exe	28
PID 2652 wrote to memory of 2596	2652	897be7be189a1e444c44535b7dd1f967ff7eb49bec25367efcbed724c76efffb.exe	28
PID 2596 wrote to memory of 2588	2596	svchost.exe	30
PID 2596 wrote to memory of 2588	2596	svchost.exe	30
PID 2596 wrote to memory of 2588	2596	svchost.exe	30
PID 2588 wrote to memory of 2952	2588	cmd.exe	32
PID 2588 wrote to memory of 2952	2588	cmd.exe	32
PID 2588 wrote to memory of 2952	2588	cmd.exe	32
PID 2588 wrote to memory of 892	2588	cmd.exe	36
PID 2588 wrote to memory of 892	2588	cmd.exe	36
PID 2588 wrote to memory of 892	2588	cmd.exe	36
PID 2596 wrote to memory of 696	2596	svchost.exe	38
PID 2596 wrote to memory of 696	2596	svchost.exe	38
PID 2596 wrote to memory of 696	2596	svchost.exe	38
PID 696 wrote to memory of 1060	696	cmd.exe	40
PID 696 wrote to memory of 1060	696	cmd.exe	40
PID 696 wrote to memory of 1060	696	cmd.exe	40
PID 696 wrote to memory of 2180	696	cmd.exe	41
PID 696 wrote to memory of 2180	696	cmd.exe	41
PID 696 wrote to memory of 2180	696	cmd.exe	41
PID 2596 wrote to memory of 2116	2596	svchost.exe	42
PID 2596 wrote to memory of 2116	2596	svchost.exe	42
PID 2596 wrote to memory of 2116	2596	svchost.exe	42
PID 2116 wrote to memory of 864	2116	cmd.exe	44
PID 2116 wrote to memory of 864	2116	cmd.exe	44
PID 2116 wrote to memory of 864	2116	cmd.exe	44
PID 2596 wrote to memory of 1940	2596	svchost.exe	48
PID 2596 wrote to memory of 1940	2596	svchost.exe	48
PID 2596 wrote to memory of 1940	2596	svchost.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\897be7be189a1e444c44535b7dd1f967ff7eb49bec25367efcbed724c76efffb.exe
"C:\Users\Admin\AppData\Local\Temp\897be7be189a1e444c44535b7dd1f967ff7eb49bec25367efcbed724c76efffb.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2652
- 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:2596
- - 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:2588
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2952
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:892
- - 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:696
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1060
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2180
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2116
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:864
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\READ_ME.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:1940

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2644

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1600

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1644

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:2104

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
22KB

MD5
f086fab4e2d6de8255df5a06e0983f4a

SHA1
501c65650b6815fd837f64ce398ff4d8382475e5

SHA256
897be7be189a1e444c44535b7dd1f967ff7eb49bec25367efcbed724c76efffb

SHA512
9c9ef27dc35f684a0d55f3202887a06ae8cb956e154795802034b9add97dbf5faf337680acb6fa96f3f2250cbe5f4f90caa47d9d43e550368b2b3d0403a40a53

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

Filesize
67B

MD5
a72ae082b265f256a2a53a8652a356f3

SHA1
6036049c9bd13bf8a68d92682edd8b0dfa5ea62e

SHA256
b0303a6a7a6ae276d3aaa16480b14e2cd549e382c21fb80506782186010ef0eb

SHA512
ac464dd9e7cd5298e2278d592965a863c4489f0a5b45a63929d2b179cd5a7ef9b9b194a3771e0b731cc52154276535008ee03469f31ec144249aebef4ce552c2

Download Submit
memory/2596-7-0x00000000009B0000-0x00000000009BC000-memory.dmp

Filesize
48KB

Download
memory/2596-17-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/2596-20-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/2596-435-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/2652-0-0x000007FEF5D13000-0x000007FEF5D14000-memory.dmp

Filesize
4KB

Download
memory/2652-1-0x0000000001350000-0x000000000135C000-memory.dmp

Filesize
48KB

Download