chaos | 9b74a10d6efbf33d56285505ae702947ea333447bfc583537f14018569b62ea6

Analysis

max time kernel
96s
max time network
138s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
19/11/2024, 02:55

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General

Target
TestServer.exe
Size 107KB
Sample241119-deemcayrat
SHA256 9b74a10d6efbf33d56285505ae702947ea333447bfc583537f14018569b62ea6
MD5 c133ce6541688d84cfb35186fa8ad88f
SHA1 67d7c34ce8548ffcd1ec4f8608beba7a06b1fb0b
SHA512 81efaf9f3b580ec37d5237663cca2f0ef8d9683304ee9a679da6be2c30961adad8c7bb38b64b0f1fbd4163667927871e912e0b669de2796cb14c370ea5707d50
SSDEEP 384:N3Mg/bqo2W4fSpJpMDKw/+988Jrr91CvpQHACQIdQepRsva46eLrTH+33M3zJ1oL:3qo2apMDN/NUrr9Ip5epij
MD5 SHA1 SHA512 SSDEEP

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 2 IoCs

resource	yara_rule
behavioral2/memory/2116-1-0x0000000000790000-0x00000000007B0000-memory.dmp	family_chaos
behavioral2/files/0x0009000000023c7d-7.dat	family_chaos

Chaos 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
972	bcdedit.exe
3032	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
5024	wbadmin.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	svchost.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	TestServer.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\FORNATHAN.txt	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2876	svchost.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

Drops desktop.ini file(s) 34 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\Pictures\Saved Pictures\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\User Pinned\TaskBar\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\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\Favorites\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\OneDrive\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\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\Maintenance\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\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\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\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\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\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\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\Administrative Tools\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-1045960512-3948844814-3059691613-1000\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\Pictures\Camera Roll\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\System Tools\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\xdzjtddd9.jpg"	svchost.exe

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

System Information Discovery
T1082

Checks SCSI registry key(s) 3 TTPs 4 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\DISK&VEN_WDC&PROD_WDS100T2B0A\4&215468A5&0&000000	vds.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\FriendlyName	vds.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CDROM&VEN_QEMU&PROD_QEMU_DVD-ROM\4&215468A5&0&010000	vds.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_QEMU&Prod_QEMU_DVD-ROM\4&215468a5&0&010000\FriendlyName	vds.exe

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
4216	vssadmin.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000_Classes\Local Settings	svchost.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
3636	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2876	svchost.exe

Suspicious behavior: EnumeratesProcesses 49 IoCs

pid	Process
2116	TestServer.exe
2116	TestServer.exe
2116	TestServer.exe
2116	TestServer.exe
2116	TestServer.exe
2116	TestServer.exe
2116	TestServer.exe
2116	TestServer.exe
2116	TestServer.exe
2116	TestServer.exe
2116	TestServer.exe
2116	TestServer.exe
2116	TestServer.exe
2116	TestServer.exe
2116	TestServer.exe
2116	TestServer.exe
2116	TestServer.exe
2116	TestServer.exe
2116	TestServer.exe
2116	TestServer.exe
2116	TestServer.exe
2116	TestServer.exe
2116	TestServer.exe
2876	svchost.exe
2876	svchost.exe
2876	svchost.exe
2876	svchost.exe
2876	svchost.exe
2876	svchost.exe
2876	svchost.exe
2876	svchost.exe
2876	svchost.exe
2876	svchost.exe
2876	svchost.exe
2876	svchost.exe
2876	svchost.exe
2876	svchost.exe
2876	svchost.exe
2876	svchost.exe
2876	svchost.exe
2876	svchost.exe
2876	svchost.exe
2876	svchost.exe
2876	svchost.exe
2876	svchost.exe
2876	svchost.exe
2876	svchost.exe
2876	svchost.exe
2876	svchost.exe

Suspicious use of AdjustPrivilegeToken 50 IoCs

description	pid	Process
Token: SeDebugPrivilege	2116	TestServer.exe
Token: SeDebugPrivilege	2876	svchost.exe
Token: SeBackupPrivilege	1688	vssvc.exe
Token: SeRestorePrivilege	1688	vssvc.exe
Token: SeAuditPrivilege	1688	vssvc.exe
Token: SeIncreaseQuotaPrivilege	2908	WMIC.exe
Token: SeSecurityPrivilege	2908	WMIC.exe
Token: SeTakeOwnershipPrivilege	2908	WMIC.exe
Token: SeLoadDriverPrivilege	2908	WMIC.exe
Token: SeSystemProfilePrivilege	2908	WMIC.exe
Token: SeSystemtimePrivilege	2908	WMIC.exe
Token: SeProfSingleProcessPrivilege	2908	WMIC.exe
Token: SeIncBasePriorityPrivilege	2908	WMIC.exe
Token: SeCreatePagefilePrivilege	2908	WMIC.exe
Token: SeBackupPrivilege	2908	WMIC.exe
Token: SeRestorePrivilege	2908	WMIC.exe
Token: SeShutdownPrivilege	2908	WMIC.exe
Token: SeDebugPrivilege	2908	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2908	WMIC.exe
Token: SeRemoteShutdownPrivilege	2908	WMIC.exe
Token: SeUndockPrivilege	2908	WMIC.exe
Token: SeManageVolumePrivilege	2908	WMIC.exe
Token: 33	2908	WMIC.exe
Token: 34	2908	WMIC.exe
Token: 35	2908	WMIC.exe
Token: 36	2908	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2908	WMIC.exe
Token: SeSecurityPrivilege	2908	WMIC.exe
Token: SeTakeOwnershipPrivilege	2908	WMIC.exe
Token: SeLoadDriverPrivilege	2908	WMIC.exe
Token: SeSystemProfilePrivilege	2908	WMIC.exe
Token: SeSystemtimePrivilege	2908	WMIC.exe
Token: SeProfSingleProcessPrivilege	2908	WMIC.exe
Token: SeIncBasePriorityPrivilege	2908	WMIC.exe
Token: SeCreatePagefilePrivilege	2908	WMIC.exe
Token: SeBackupPrivilege	2908	WMIC.exe
Token: SeRestorePrivilege	2908	WMIC.exe
Token: SeShutdownPrivilege	2908	WMIC.exe
Token: SeDebugPrivilege	2908	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2908	WMIC.exe
Token: SeRemoteShutdownPrivilege	2908	WMIC.exe
Token: SeUndockPrivilege	2908	WMIC.exe
Token: SeManageVolumePrivilege	2908	WMIC.exe
Token: 33	2908	WMIC.exe
Token: 34	2908	WMIC.exe
Token: 35	2908	WMIC.exe
Token: 36	2908	WMIC.exe
Token: SeBackupPrivilege	3040	wbengine.exe
Token: SeRestorePrivilege	3040	wbengine.exe
Token: SeSecurityPrivilege	3040	wbengine.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2116 wrote to memory of 2876	2116	TestServer.exe	100
PID 2116 wrote to memory of 2876	2116	TestServer.exe	100
PID 2876 wrote to memory of 1240	2876	svchost.exe	102
PID 2876 wrote to memory of 1240	2876	svchost.exe	102
PID 1240 wrote to memory of 4216	1240	cmd.exe	104
PID 1240 wrote to memory of 4216	1240	cmd.exe	104
PID 1240 wrote to memory of 2908	1240	cmd.exe	108
PID 1240 wrote to memory of 2908	1240	cmd.exe	108
PID 2876 wrote to memory of 3500	2876	svchost.exe	109
PID 2876 wrote to memory of 3500	2876	svchost.exe	109
PID 3500 wrote to memory of 972	3500	cmd.exe	111
PID 3500 wrote to memory of 972	3500	cmd.exe	111
PID 3500 wrote to memory of 3032	3500	cmd.exe	112
PID 3500 wrote to memory of 3032	3500	cmd.exe	112
PID 2876 wrote to memory of 3140	2876	svchost.exe	113
PID 2876 wrote to memory of 3140	2876	svchost.exe	113
PID 3140 wrote to memory of 5024	3140	cmd.exe	115
PID 3140 wrote to memory of 5024	3140	cmd.exe	115
PID 2876 wrote to memory of 3636	2876	svchost.exe	119
PID 2876 wrote to memory of 3636	2876	svchost.exe	119

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\TestServer.exe
"C:\Users\Admin\AppData\Local\Temp\TestServer.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2116
- C:\Users\Admin\AppData\Roaming\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Drops desktop.ini file(s)
  - Sets desktop wallpaper using registry
  - Modifies registry class
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2876
- - 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:1240
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:4216
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2908
- - 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:3500
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:972
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:3032
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3140
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:5024
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\FORNATHAN.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:3636

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1688

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3040

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:3916

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
- Checks SCSI registry key(s)
PID:4452

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

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

svchost.exe

Path C:\Users\Admin\AppData\Roaming\svchost.exe
Size 107KB
SHA256 9b74a10d6efbf33d56285505ae702947ea333447bfc583537f14018569b62ea6
MD5 c133ce6541688d84cfb35186fa8ad88f
SHA1 67d7c34ce8548ffcd1ec4f8608beba7a06b1fb0b
SHA512 81efaf9f3b580ec37d5237663cca2f0ef8d9683304ee9a679da6be2c30961adad8c7bb38b64b0f1fbd4163667927871e912e0b669de2796cb14c370ea5707d50
SSDEEP 384:N3Mg/bqo2W4fSpJpMDKw/+988Jrr91CvpQHACQIdQepRsva46eLrTH+33M3zJ1oL:3qo2apMDN/NUrr9Ip5epij
MD5 SHA1 SHA512 SSDEEP

Submit Download

FORNATHAN.txt

Path C:\Users\Admin\Documents\FORNATHAN.txt
Size 1KB
SHA256 728c388adb493e26c58db0970a59573e7cb136e5463076324bd978d8b6bf0e2f
MD5 fe77eea33bfab77e62aa9c84307322d7
SHA1 a0ae02f0e7fef9da285a2ef350fb389309761171
SHA512 9ced19eaaffdbae688137b2d26ef5de30e5310acb2dc1801607437154fad690aeed5c08971a1395495dc72175178ce7b18a5a73ab272ca1e34abd316091da295
MD5 SHA1 SHA512

Submit Download

memory/2116-0-0x00007FFB768C3000-0x00007FFB768C5000-memory.dmp

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memory/2116-1-0x0000000000790000-0x00000000007B0000-memory.dmp

Download

memory/2116-2-0x00007FFB768C3000-0x00007FFB768C5000-memory.dmp

Download

memory/2876-15-0x00007FFB768C0000-0x00007FFB77381000-memory.dmp

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memory/2876-491-0x00007FFB768C0000-0x00007FFB77381000-memory.dmp

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