babuk | a41df9f000efd4e8286fdac8f793da281e4a58761e90c2c149d8ee126e23a6d4

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06-11-2024 21:51

241106-1qlalaydkg 10

04-11-2024 21:29

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04-11-2024 21:17

241104-z43lcsxejc 10

03-11-2024 21:29

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Analysis

max time kernel
24s
max time network
25s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
06-11-2024 21:51

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Reason

Machine shutdown

Report Analysis Logs

General

Target

79a67070f0fbff66cb39f3dadd3e3565b1b1b98ed9e079562aabd90d10ad75ac.exe
Size

12.0MB
MD5

59d018958d77ee68568eac6250a4224e
SHA1

a5ac1b794b33da74b7d587b04394721f7aa96d0f
SHA256

79a67070f0fbff66cb39f3dadd3e3565b1b1b98ed9e079562aabd90d10ad75ac
SHA512

5f285f3920463646a77487c9e0b1c46ebe950f779fafb524d6064aa280ba84c3119cd19c2b88f3011e20a7f7b70a1341103d42baca28f1781d8670bca8737881
SSDEEP

393216:VobaG+ZUoC9EYeWJ8taL/d2otNCk2rszUXS:VMaG+Z7C9M+RJ2ontkXS

Score

10^/10

babuk defense_evasion discovery execution impact pyinstaller ransomware

Malware Config

Signatures

Babuk Locker
RaaS first seen in 2021 initially called Vasa Locker.
ransomware babuk
Babuk family
babuk
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
Renames multiple (182) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

Executes dropped EXE 3 IoCs

pid	Process
4340	valorant-skin-cli.exe
3592	e_win.exe
2636	valorant-skin-cli.exe

Loads dropped DLL 18 IoCs

pid	Process
2636	valorant-skin-cli.exe
2636	valorant-skin-cli.exe
2636	valorant-skin-cli.exe
2636	valorant-skin-cli.exe
2636	valorant-skin-cli.exe
2636	valorant-skin-cli.exe
2636	valorant-skin-cli.exe
2636	valorant-skin-cli.exe
2636	valorant-skin-cli.exe
2636	valorant-skin-cli.exe
2636	valorant-skin-cli.exe
2636	valorant-skin-cli.exe
2636	valorant-skin-cli.exe
2636	valorant-skin-cli.exe
2636	valorant-skin-cli.exe
2636	valorant-skin-cli.exe
2636	valorant-skin-cli.exe
2636	valorant-skin-cli.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\R:	e_win.exe
File opened (read-only)	\??\Y:	e_win.exe
File opened (read-only)	\??\O:	e_win.exe
File opened (read-only)	\??\H:	e_win.exe
File opened (read-only)	\??\X:	e_win.exe
File opened (read-only)	\??\E:	e_win.exe
File opened (read-only)	\??\U:	e_win.exe
File opened (read-only)	\??\I:	e_win.exe
File opened (read-only)	\??\P:	e_win.exe
File opened (read-only)	\??\S:	e_win.exe
File opened (read-only)	\??\G:	e_win.exe
File opened (read-only)	\??\J:	e_win.exe
File opened (read-only)	\??\B:	e_win.exe
File opened (read-only)	\??\W:	e_win.exe
File opened (read-only)	\??\M:	e_win.exe
File opened (read-only)	\??\T:	e_win.exe
File opened (read-only)	\??\A:	e_win.exe
File opened (read-only)	\??\V:	e_win.exe
File opened (read-only)	\??\N:	e_win.exe
File opened (read-only)	\??\Q:	e_win.exe
File opened (read-only)	\??\L:	e_win.exe
File opened (read-only)	\??\Z:	e_win.exe
File opened (read-only)	\??\K:	e_win.exe

Detects Pyinstaller 1 IoCs

pyinstaller

resource	yara_rule
behavioral1/files/0x001c00000002aa6b-4.dat	pyinstaller

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e_win.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	79a67070f0fbff66cb39f3dadd3e3565b1b1b98ed9e079562aabd90d10ad75ac.exe

Interacts with shadow copies 3 TTPs 2 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
3764	vssadmin.exe
916	vssadmin.exe

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = 99ebff004cc2ff000091f8000078d4000067c000003e9200001a6800f7630c00	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4290799360"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "55"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365268"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365268"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292114432"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292114432"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1"	LogonUI.exe

Modifies registry class 4 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2499603254-3415597248-1508446358-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\Cookies\CachePrefix = "Cookie:"	BackgroundTransferHost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2499603254-3415597248-1508446358-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\History\CachePrefix = "Visited:"	BackgroundTransferHost.exe
Key created	\REGISTRY\USER\S-1-5-21-2499603254-3415597248-1508446358-1000_Classes\Local Settings\MuiCache	BackgroundTransferHost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2499603254-3415597248-1508446358-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\Content\CachePrefix	BackgroundTransferHost.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3592	e_win.exe
3592	e_win.exe
2636	valorant-skin-cli.exe
2636	valorant-skin-cli.exe
2636	valorant-skin-cli.exe
2636	valorant-skin-cli.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: 35	2636	valorant-skin-cli.exe
Token: SeDebugPrivilege	2636	valorant-skin-cli.exe
Token: SeBackupPrivilege	4748	vssvc.exe
Token: SeRestorePrivilege	4748	vssvc.exe
Token: SeAuditPrivilege	4748	vssvc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1188	LogonUI.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3496 wrote to memory of 4340	3496	79a67070f0fbff66cb39f3dadd3e3565b1b1b98ed9e079562aabd90d10ad75ac.exe	79
PID 3496 wrote to memory of 4340	3496	79a67070f0fbff66cb39f3dadd3e3565b1b1b98ed9e079562aabd90d10ad75ac.exe	79
PID 3496 wrote to memory of 3592	3496	79a67070f0fbff66cb39f3dadd3e3565b1b1b98ed9e079562aabd90d10ad75ac.exe	81
PID 3496 wrote to memory of 3592	3496	79a67070f0fbff66cb39f3dadd3e3565b1b1b98ed9e079562aabd90d10ad75ac.exe	81
PID 3496 wrote to memory of 3592	3496	79a67070f0fbff66cb39f3dadd3e3565b1b1b98ed9e079562aabd90d10ad75ac.exe	81
PID 3592 wrote to memory of 908	3592	e_win.exe	82
PID 3592 wrote to memory of 908	3592	e_win.exe	82
PID 4340 wrote to memory of 2636	4340	valorant-skin-cli.exe	84
PID 4340 wrote to memory of 2636	4340	valorant-skin-cli.exe	84
PID 908 wrote to memory of 3764	908	cmd.exe	86
PID 908 wrote to memory of 3764	908	cmd.exe	86
PID 3592 wrote to memory of 2528	3592	e_win.exe	90
PID 3592 wrote to memory of 2528	3592	e_win.exe	90
PID 2528 wrote to memory of 916	2528	cmd.exe	92
PID 2528 wrote to memory of 916	2528	cmd.exe	92

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\79a67070f0fbff66cb39f3dadd3e3565b1b1b98ed9e079562aabd90d10ad75ac.exe
"C:\Users\Admin\AppData\Local\Temp\79a67070f0fbff66cb39f3dadd3e3565b1b1b98ed9e079562aabd90d10ad75ac.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3496
- C:\Users\Admin\AppData\Local\Temp\valorant-skin-cli.exe
  "C:\Users\Admin\AppData\Local\Temp\valorant-skin-cli.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:4340
- - C:\Users\Admin\AppData\Local\Temp\valorant-skin-cli.exe
    "C:\Users\Admin\AppData\Local\Temp\valorant-skin-cli.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2636
- C:\Users\Admin\AppData\Local\Temp\e_win.exe
  "C:\Users\Admin\AppData\Local\Temp\e_win.exe"
  2⤵
  - Executes dropped EXE
  - Enumerates connected drives
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3592
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:908
  - - C:\Windows\system32\vssadmin.exe
      vssadmin.exe delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:3764
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2528
  - - C:\Windows\system32\vssadmin.exe
      vssadmin.exe delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:916

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4748

C:\Windows\system32\BackgroundTransferHost.exe
"BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.13
1⤵
- Modifies registry class
PID:4136

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa3a1f855 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:1188

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Windows Management Instrumentation

T1047

Persistence

Privilege Escalation

Defense Evasion

Direct Volume Access

T1006

Indicator Removal

T1070

File Deletion

T1070.004

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact