djvu | 214174b3cb076fc05b683fb80189ace40fc0edb59a36d109fd3c0f69a380a48a

Analysis

max time kernel
147s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
06/07/2024, 04:23

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General

Target
8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe
Size 691KB
Sample240706-ez8xcsvhkk
SHA256 8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b
MD5 88112987854f5a3bd04516f6a3334880
SHA1 a8c7e14800cf6d7a5140c22e6d34bb76275e38ae
SHA512 a37baad956e5bf8f57f02ea69083271aa866df10acccdedf374c66b0d072a368f1e0e9cb5c1ec0e87f8263fdc7369f033d3be814d221274ecf2986d7dfb14bdd
SSDEEP 12288:Ryxs0QrMKlM/zKo0Bjfym1Eewp7W57D56GSLM9LFZ0BMR1Dt44Sf/C7+GmZec8L7:0EyzKo0Bjpey5X5CMWMxthS/C7fcW7
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://cajgtus.com/test1/get.php

Attributes

extension
.watz
offline_id
Lc3VTezPWbMhuVAQFzJUdeA68PwI7UDpc5aKHYt1
payload_url
ransomnote
ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/abe121434ad837dd5bdd03878a14485820240531135509/34284d Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0874PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/1552-2-0x0000000004460000-0x000000000457B000-memory.dmp	family_djvu
behavioral2/memory/4840-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4840-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4840-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4840-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4840-12-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4232-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4232-16-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4232-18-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4232-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4232-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4232-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4232-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4232-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4232-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4232-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4232-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Checks computer location settings 2 TTPs 1 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-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3244	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\cae81009-d42e-49b2-8476-cf663a5fc0ac\\8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe\" --AutoStart"	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
2	api.2ip.ua
5	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1552 set thread context of 4840	1552	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	80
PID 4428 set thread context of 4232	4428	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	85

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4840	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe
4840	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe
4232	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe
4232	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1552 wrote to memory of 4840	1552	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	80
PID 1552 wrote to memory of 4840	1552	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	80
PID 1552 wrote to memory of 4840	1552	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	80
PID 1552 wrote to memory of 4840	1552	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	80
PID 1552 wrote to memory of 4840	1552	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	80
PID 1552 wrote to memory of 4840	1552	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	80
PID 1552 wrote to memory of 4840	1552	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	80
PID 1552 wrote to memory of 4840	1552	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	80
PID 1552 wrote to memory of 4840	1552	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	80
PID 1552 wrote to memory of 4840	1552	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	80
PID 4840 wrote to memory of 3244	4840	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	82
PID 4840 wrote to memory of 3244	4840	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	82
PID 4840 wrote to memory of 3244	4840	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	82
PID 4840 wrote to memory of 4428	4840	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	83
PID 4840 wrote to memory of 4428	4840	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	83
PID 4840 wrote to memory of 4428	4840	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	83
PID 4428 wrote to memory of 4232	4428	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	85
PID 4428 wrote to memory of 4232	4428	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	85
PID 4428 wrote to memory of 4232	4428	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	85
PID 4428 wrote to memory of 4232	4428	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	85
PID 4428 wrote to memory of 4232	4428	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	85
PID 4428 wrote to memory of 4232	4428	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	85
PID 4428 wrote to memory of 4232	4428	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	85
PID 4428 wrote to memory of 4232	4428	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	85
PID 4428 wrote to memory of 4232	4428	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	85
PID 4428 wrote to memory of 4232	4428	8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe	85

C:\Users\Admin\AppData\Local\Temp\8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe
"C:\Users\Admin\AppData\Local\Temp\8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1552
- C:\Users\Admin\AppData\Local\Temp\8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe
  "C:\Users\Admin\AppData\Local\Temp\8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4840
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\cae81009-d42e-49b2-8476-cf663a5fc0ac" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3244
- - C:\Users\Admin\AppData\Local\Temp\8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe
    "C:\Users\Admin\AppData\Local\Temp\8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4428
  - - C:\Users\Admin\AppData\Local\Temp\8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe
      "C:\Users\Admin\AppData\Local\Temp\8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4232

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

File and Directory Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe

Path C:\Users\Admin\AppData\Local\cae81009-d42e-49b2-8476-cf663a5fc0ac\8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b.exe
Size 691KB
SHA256 8cf61c66b1cde95afdc402040152b3ca0022fceb866b84be297572708b08cb5b
MD5 88112987854f5a3bd04516f6a3334880
SHA1 a8c7e14800cf6d7a5140c22e6d34bb76275e38ae
SHA512 a37baad956e5bf8f57f02ea69083271aa866df10acccdedf374c66b0d072a368f1e0e9cb5c1ec0e87f8263fdc7369f033d3be814d221274ecf2986d7dfb14bdd
SSDEEP 12288:Ryxs0QrMKlM/zKo0Bjfym1Eewp7W57D56GSLM9LFZ0BMR1Dt44Sf/C7+GmZec8L7:0EyzKo0Bjpey5X5CMWMxthS/C7fcW7
MD5 SHA1 SHA512 SSDEEP

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memory/1552-2-0x0000000004460000-0x000000000457B000-memory.dmp

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memory/1552-1-0x0000000002900000-0x00000000029A2000-memory.dmp

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memory/4232-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4232-20-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4232-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4232-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4232-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4232-15-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4232-16-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4232-18-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4232-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4232-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4232-25-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4840-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4840-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4840-12-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4840-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4840-6-0x0000000000400000-0x0000000000537000-memory.dmp

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