rook | 96f7df1c984c1753289600f7f373f3a98a4f09f82acc1be8ecfd5790763a355b

Resubmissions

11-01-2022 18:27

220111-w33m7agfg9 10

20-12-2021 20:51

211220-zm6xfsbge6 10

Analysis

max time kernel
256s
max time network
141s
platform
windows10_x64
resource
win10-en-20211208
submitted
11-01-2022 18:27

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Report Analysis Logs

General

Target

rook1.exe
Size

5.4MB
MD5

4f7adc32ec67c1a55853ef828fe58707
SHA1

36de7997949ac3b9b456023fb072b9a8cd84ade8
SHA256

96f7df1c984c1753289600f7f373f3a98a4f09f82acc1be8ecfd5790763a355b
SHA512

a45e4a20133c842037789157c3ed845afdefbb0d2fe3958d75f0cb3cdfeee106262f9de0e0aca92ac84a0211432cd19773e0f769b970ddb8a80e5f7855676f74

Score

10^/10

rook discovery ransomware vmprotect

Malware Config

Extracted

Path

C:\PerfLogs\HowToRestoreYourFiles.txt

Family

rook

Ransom Note

-----------Welcome. Again. -------------------- [+]Whats Happen?[+] Your files are encrypted,and currently unavailable. You can check it: all files on you computer has expansion robet. By the way,everything is possible to recover (restore), but you need to follow our instructions. Otherwise, you cant return your data (NEVER). [+] What guarantees?[+] Its just a business. We absolutely do not care about you and your deals, except getting benefits. If we do not do our work and liabilities - nobody will not cooperate with us. Its not in our interests. To check the file capacity, please send 3 files not larger than 1M to us, and we will prove that we are capable of restoring. If you will not cooperate with our service - for us, its does not matter. But you will lose your time and data,cause just we have the private key. In practise - time is much more valuable than money. If we find that a security vendor or law enforcement agency pretends to be you to negotiate with us, we will directly destroy the private key and no longer provide you with decryption services. You have 3 days to contact us for negotiation. Within 3 days, we will provide a 50% discount. If the discount service is not provided for more than 3 days, the files will be leaked to our onion network. Every more than 3 days will increase the number of leaked files. Please use the company email to contact us, otherwise we will not reply. [+] How to get access on website?[+] You have two ways: 1) [Recommended] Using a TOR browser! a) Download and install TOR browser from this site:https://torproject.org/ b) Open our website:gamol6n6p2p4c3ad7gxmx3ur7wwdwlywebo2azv3vv5qlmjmole2zbyd.onion 2) Our mail box: a)[email protected] b)[email protected] c)If the mailbox fails or is taken over, please open Onion Network to check the new mailbox ------------------------------------------------------------------------------------------------ !!!DANGER!!! DONT try to change files by yourself, DONT use any third party software for restoring your data or antivirus solutions - its may entail damge of the private key and, as result, The Loss all data. !!!!!!! AGAIN: Its in your interests to get your files back. From our side, we (the best specialists) make everything for restoring, please should not interfere. !!!!!!! ONE MORE TIME: Security vendors and law enforcement agencies, please be aware that attacks on us will make us even stronger. !!!!!!!

Emails

a)[email protected]

b)[email protected]

Signatures

Rook
Rook is a ransomware which copies from NightSky ransomware.
ransomware rook
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490

Executes dropped EXE 3 IoCs

pid	Process
2988	HxDSetup.tmp
2536	HxD.exe
3200	HxD.exe

Modifies extensions of user files 10 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File opened for modification	C:\Users\Admin\Pictures\UnlockCompress.crw.Rook	rook1.exe
File opened for modification	C:\Users\Admin\Pictures\CompareReset.tif.Rook	rook1.exe
File opened for modification	C:\Users\Admin\Pictures\DenyRegister.crw.Rook	rook1.exe
File opened for modification	C:\Users\Admin\Pictures\ExpandReceive.raw.Rook	rook1.exe
File renamed	C:\Users\Admin\Pictures\ExpandInstall.png => C:\Users\Admin\Pictures\ExpandInstall.png.Rook	rook1.exe
File renamed	C:\Users\Admin\Pictures\UnlockCompress.crw => C:\Users\Admin\Pictures\UnlockCompress.crw.Rook	rook1.exe
File renamed	C:\Users\Admin\Pictures\CompareReset.tif => C:\Users\Admin\Pictures\CompareReset.tif.Rook	rook1.exe
File renamed	C:\Users\Admin\Pictures\DenyRegister.crw => C:\Users\Admin\Pictures\DenyRegister.crw.Rook	rook1.exe
File renamed	C:\Users\Admin\Pictures\ExpandReceive.raw => C:\Users\Admin\Pictures\ExpandReceive.raw.Rook	rook1.exe
File opened for modification	C:\Users\Admin\Pictures\ExpandInstall.png.Rook	rook1.exe

VMProtect packed file 1 IoCs

Detects executables packed with VMProtect commercial packer.

vmprotect

resource	yara_rule
behavioral2/memory/2424-115-0x00007FF7DCE80000-0x00007FF7DD79D000-memory.dmp	vmprotect

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Enumerates connected drives 3 TTPs 24 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)	\??\J:	rook1.exe
File opened (read-only)	\??\K:	rook1.exe
File opened (read-only)	\??\V:	rook1.exe
File opened (read-only)	\??\W:	rook1.exe
File opened (read-only)	\??\R:	rook1.exe
File opened (read-only)	\??\Y:	rook1.exe
File opened (read-only)	\??\P:	rook1.exe
File opened (read-only)	\??\G:	rook1.exe
File opened (read-only)	\??\H:	rook1.exe
File opened (read-only)	\??\N:	rook1.exe
File opened (read-only)	\??\Q:	rook1.exe
File opened (read-only)	\??\E:	rook1.exe
File opened (read-only)	\??\U:	rook1.exe
File opened (read-only)	\??\A:	rook1.exe
File opened (read-only)	\??\S:	rook1.exe
File opened (read-only)	\??\O:	rook1.exe
File opened (read-only)	\??\L:	rook1.exe
File opened (read-only)	\??\B:	rook1.exe
File opened (read-only)	\??\M:	rook1.exe
File opened (read-only)	\??\T:	rook1.exe
File opened (read-only)	\??\I:	rook1.exe
File opened (read-only)	\??\F:	rook1.exe
File opened (read-only)	\??\Z:	rook1.exe
File opened (read-only)	\??\X:	rook1.exe

Drops file in Program Files directory 8 IoCs

description	ioc	Process
File created	C:\Program Files\HxD\is-EV99A.tmp	HxDSetup.tmp
File opened for modification	C:\Program Files\HxD\unins000.dat	HxDSetup.tmp
File opened for modification	C:\Program Files\HxD\HxD.exe	HxDSetup.tmp
File created	C:\Program Files\HxD\unins000.dat	HxDSetup.tmp
File created	C:\Program Files\HxD\is-9B0S8.tmp	HxDSetup.tmp
File created	C:\Program Files\HxD\is-UKROV.tmp	HxDSetup.tmp
File created	C:\Program Files\HxD\is-90RVN.tmp	HxDSetup.tmp
File created	C:\Program Files\HxD\is-125LP.tmp	HxDSetup.tmp

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 5 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	firefox.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Update Signature	firefox.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Update Revision	firefox.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~Mhz	firefox.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	firefox.exe

Interacts with shadow copies 2 TTPs 2 IoCs

Shadow copies are often targeted by ransomware to inhibit system recovery.

ransomware

File Deletion

T1107

Inhibit System Recovery

T1490

pid	Process
352	vssadmin.exe
2972	vssadmin.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings	firefox.exe
Key created	\REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings	HxDSetup.tmp

NTFS ADS 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Local\Temp\HxDSetup.zip:Zone.Identifier	firefox.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1372	NOTEPAD.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2424	rook1.exe
2424	rook1.exe
2424	rook1.exe
2424	rook1.exe
2988	HxDSetup.tmp
2988	HxDSetup.tmp

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2536	HxD.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	4080	vssvc.exe
Token: SeRestorePrivilege	4080	vssvc.exe
Token: SeAuditPrivilege	4080	vssvc.exe
Token: SeDebugPrivilege	2292	firefox.exe
Token: SeDebugPrivilege	2292	firefox.exe
Token: SeDebugPrivilege	2292	firefox.exe

Suspicious use of FindShellTrayWindow 8 IoCs

pid	Process
2292	firefox.exe
2292	firefox.exe
2292	firefox.exe
2292	firefox.exe
2292	firefox.exe
2292	firefox.exe
2988	HxDSetup.tmp
2536	HxD.exe

Suspicious use of SendNotifyMessage 5 IoCs

pid	Process
2292	firefox.exe
2292	firefox.exe
2292	firefox.exe
2292	firefox.exe
2292	firefox.exe

Suspicious use of SetWindowsHookEx 13 IoCs

pid	Process
2292	firefox.exe
2292	firefox.exe
2292	firefox.exe
2292	firefox.exe
2292	firefox.exe
2292	firefox.exe
2292	firefox.exe
2536	HxD.exe
2536	HxD.exe
2536	HxD.exe
2536	HxD.exe
2536	HxD.exe
2536	HxD.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2424 wrote to memory of 3548	2424	rook1.exe	69
PID 2424 wrote to memory of 3548	2424	rook1.exe	69
PID 3548 wrote to memory of 2972	3548	cmd.exe	71
PID 3548 wrote to memory of 2972	3548	cmd.exe	71
PID 2424 wrote to memory of 668	2424	rook1.exe	76
PID 2424 wrote to memory of 668	2424	rook1.exe	76
PID 668 wrote to memory of 352	668	cmd.exe	78
PID 668 wrote to memory of 352	668	cmd.exe	78
PID 2544 wrote to memory of 2292	2544	firefox.exe	83
PID 2544 wrote to memory of 2292	2544	firefox.exe	83
PID 2544 wrote to memory of 2292	2544	firefox.exe	83
PID 2544 wrote to memory of 2292	2544	firefox.exe	83
PID 2544 wrote to memory of 2292	2544	firefox.exe	83
PID 2544 wrote to memory of 2292	2544	firefox.exe	83
PID 2544 wrote to memory of 2292	2544	firefox.exe	83
PID 2544 wrote to memory of 2292	2544	firefox.exe	83
PID 2544 wrote to memory of 2292	2544	firefox.exe	83
PID 2292 wrote to memory of 3228	2292	firefox.exe	84
PID 2292 wrote to memory of 3228	2292	firefox.exe	84
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 252	2292	firefox.exe	86
PID 2292 wrote to memory of 4044	2292	firefox.exe	87
PID 2292 wrote to memory of 4044	2292	firefox.exe	87

C:\Users\Admin\AppData\Local\Temp\rook1.exe
"C:\Users\Admin\AppData\Local\Temp\rook1.exe"
1⤵
- Modifies extensions of user files
- Enumerates connected drives
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2424
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3548
- - C:\Windows\system32\vssadmin.exe
    vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:2972
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:668
- - C:\Windows\system32\vssadmin.exe
    vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:352

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4080

C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Public\Desktop\HowToRestoreYourFiles.txt
1⤵
- Opens file in notepad (likely ransom note)
PID:1372

C:\Program Files\Mozilla Firefox\firefox.exe
"C:\Program Files\Mozilla Firefox\firefox.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2544
- C:\Program Files\Mozilla Firefox\firefox.exe
  "C:\Program Files\Mozilla Firefox\firefox.exe"
  2⤵
  - Checks processor information in registry
  - Modifies registry class
  - NTFS ADS
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2292
- - C:\Program Files\Mozilla Firefox\firefox.exe
    "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="2292.0.362930531\1637752897" -parentBuildID 20200403170909 -prefsHandle 1532 -prefMapHandle 1196 -prefsLen 1 -prefMapSize 219680 -appdir "C:\Program Files\Mozilla Firefox\browser" - 2292 "\\.\pipe\gecko-crash-server-pipe.2292" 1612 gpu
    3⤵
    PID:3228
- - C:\Program Files\Mozilla Firefox\firefox.exe
    "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="2292.3.1026824613\1963083986" -childID 1 -isForBrowser -prefsHandle 2172 -prefMapHandle 2112 -prefsLen 156 -prefMapSize 219680 -parentBuildID 20200403170909 -appdir "C:\Program Files\Mozilla Firefox\browser" - 2292 "\\.\pipe\gecko-crash-server-pipe.2292" 1344 tab
    3⤵
    PID:252
- - C:\Program Files\Mozilla Firefox\firefox.exe
    "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="2292.13.1115367397\557600314" -childID 2 -isForBrowser -prefsHandle 3412 -prefMapHandle 3408 -prefsLen 7013 -prefMapSize 219680 -parentBuildID 20200403170909 -appdir "C:\Program Files\Mozilla Firefox\browser" - 2292 "\\.\pipe\gecko-crash-server-pipe.2292" 3464 tab
    3⤵
    PID:4044
- - C:\Program Files\Mozilla Firefox\firefox.exe
    "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="2292.20.1344329058\1002893433" -childID 3 -isForBrowser -prefsHandle 2784 -prefMapHandle 4472 -prefsLen 7784 -prefMapSize 219680 -parentBuildID 20200403170909 -appdir "C:\Program Files\Mozilla Firefox\browser" - 2292 "\\.\pipe\gecko-crash-server-pipe.2292" 4284 tab
    3⤵
    PID:740

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:420

C:\Users\Admin\AppData\Local\Temp\Temp1_HxDSetup.zip\HxDSetup.exe
"C:\Users\Admin\AppData\Local\Temp\Temp1_HxDSetup.zip\HxDSetup.exe"
1⤵
PID:2608
- C:\Users\Admin\AppData\Local\Temp\is-HDKK1.tmp\HxDSetup.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-HDKK1.tmp\HxDSetup.tmp" /SL5="$3023C,2973524,121344,C:\Users\Admin\AppData\Local\Temp\Temp1_HxDSetup.zip\HxDSetup.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in Program Files directory
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of FindShellTrayWindow
  PID:2988
- - C:\Windows\SysWOW64\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Program Files\HxD\readme.txt
    3⤵
    PID:2056
- - C:\Program Files\HxD\HxD.exe
    "C:\Program Files\HxD\HxD.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of SetWindowsHookEx
    PID:2536
  - - C:\Program Files\HxD\HxD.exe
      "C:\Program Files\HxD\HxD.exe" /chooselang
      4⤵
      Executes dropped EXE
      PID:3200

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

File Deletion

T1107

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery

T1490

Replay Monitor

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Downloads

memory/2424-115-0x00007FF7DCE80000-0x00007FF7DD79D000-memory.dmp

Filesize
9.1MB

Download
memory/2424-119-0x00007FF9CAD10000-0x00007FF9CAD12000-memory.dmp

Filesize
8KB

Download
memory/2536-139-0x0000000000AB0000-0x0000000000AB1000-memory.dmp

Filesize
4KB

Download
memory/2536-140-0x0000000002C40000-0x0000000002C41000-memory.dmp

Filesize
4KB

Download
memory/2608-128-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/2988-129-0x0000000000600000-0x000000000074A000-memory.dmp

Filesize
1.3MB

Download