djvu | a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
01/05/2024, 01:51

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General

Target
a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe
Size 702KB
Sample240501-b991mafc65
SHA256 a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803
MD5 0a71da83060da9e4fffb05b88dc7e457
SHA1 864bcc7ad44100dd602f089969802eff5830c1ad
SHA512 956f1ea296b93f9bc7b6ce9f22cb76213de88528f28ae5a0a03c1ed1d40e816a57861e4e4bc60085bcb67bff341819afd3e3283a32e32ca7e8db6b28ddc27d86
SSDEEP 12288:aJON9tMho1RxtESImBxBt/qp3J0eDEzcLie/4lOOg/R78ECyDM6JdGA:COlSizIm7m3J0sE0j4EJ5aNSdGA
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://cajgtus.com/test2/get.php

Attributes

extension
.bgzq
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://cajgtus.com/files/1/build3.exe
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/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 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: 0864PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 16 IoCs

resource	yara_rule
behavioral2/memory/824-2-0x0000000004A60000-0x0000000004B7B000-memory.dmp	family_djvu
behavioral2/memory/5044-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5044-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5044-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5044-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5044-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4064-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4064-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4064-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4064-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4064-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4064-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4064-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4064-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4064-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4064-37-0x0000000000400000-0x0000000000537000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
468	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-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\6b7c1b22-1a0f-4571-8e32-bcb4b82457da\\a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe\" --AutoStart"	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe

Looks up external IP address via web service 3 IoCs

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

flow	ioc
33	api.2ip.ua
34	api.2ip.ua
57	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 824 set thread context of 5044	824	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	97
PID 404 set thread context of 4064	404	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	103

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
5044	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe
5044	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe
4064	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe
4064	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 824 wrote to memory of 5044	824	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	97
PID 824 wrote to memory of 5044	824	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	97
PID 824 wrote to memory of 5044	824	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	97
PID 824 wrote to memory of 5044	824	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	97
PID 824 wrote to memory of 5044	824	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	97
PID 824 wrote to memory of 5044	824	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	97
PID 824 wrote to memory of 5044	824	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	97
PID 824 wrote to memory of 5044	824	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	97
PID 824 wrote to memory of 5044	824	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	97
PID 824 wrote to memory of 5044	824	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	97
PID 5044 wrote to memory of 468	5044	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	98
PID 5044 wrote to memory of 468	5044	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	98
PID 5044 wrote to memory of 468	5044	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	98
PID 5044 wrote to memory of 404	5044	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	99
PID 5044 wrote to memory of 404	5044	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	99
PID 5044 wrote to memory of 404	5044	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	99
PID 404 wrote to memory of 4064	404	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	103
PID 404 wrote to memory of 4064	404	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	103
PID 404 wrote to memory of 4064	404	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	103
PID 404 wrote to memory of 4064	404	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	103
PID 404 wrote to memory of 4064	404	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	103
PID 404 wrote to memory of 4064	404	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	103
PID 404 wrote to memory of 4064	404	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	103
PID 404 wrote to memory of 4064	404	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	103
PID 404 wrote to memory of 4064	404	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	103
PID 404 wrote to memory of 4064	404	a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe	103

C:\Users\Admin\AppData\Local\Temp\a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe
"C:\Users\Admin\AppData\Local\Temp\a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:824
- C:\Users\Admin\AppData\Local\Temp\a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe
  "C:\Users\Admin\AppData\Local\Temp\a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:5044
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\6b7c1b22-1a0f-4571-8e32-bcb4b82457da" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:468
- - C:\Users\Admin\AppData\Local\Temp\a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe
    "C:\Users\Admin\AppData\Local\Temp\a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:404
  - - C:\Users\Admin\AppData\Local\Temp\a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe
      "C:\Users\Admin\AppData\Local\Temp\a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4064

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4072 --field-trial-handle=2280,i,11703952675008463361,17436195144517971517,262144 --variations-seed-version /prefetch:8
1⤵
PID:3976

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

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 1KB
SHA256 cdede115b447b845285b6436b9aa5e561a9711c30cf89d2be2a78a4e0dc88af7
MD5 422a081e58bf330679ef48dc46d7a1d5
SHA1 2636af2dca0b8da050cceb3302ca6c76fb322ecd
SHA512 77354ea7d10f2a96d715e2f8450ca2e8322d2af29a0fb4b178e5dc3c90a20c7bb8651fb36aa83ab33616505d71c3175988d1ba959024a9e035270d2d5823ab35
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 724B
SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
MD5 8202a1cd02e7d69597995cabbe881a12
SHA1 8858d9d934b7aa9330ee73de6c476acf19929ff6
SHA512 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
MD5 SHA1 SHA512

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24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 1979f5b5aeb38382753c5de5225431aab6d03ff1d276aa03f2174aa6177bd4f3
MD5 dd0dadbd4fa425031c1b9c973840a3c7
SHA1 f80c34a64f256de92a1a8242056427821d6b7825
SHA512 e014262f82985972e6853c7d9a2dcebcbed27c1fe5218ef79b1f4278fae2c2adef7f24ef9a847197278e449e22d9936411460705dbd7f5b17b9b0690c5f4782e
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 6ae5712803792401c5c1440bfcd0826a36657763e7b1908d26af0f0da673d75b
MD5 f9ff11da6d06536bfd3096e5bce37171
SHA1 f2f4eba28d8e765e4c1d640fda4569d71945c7c8
SHA512 4381f3f00f1f699a5d6b131b19c54f8e09ef6ca72790e356b2f36ddb45164334598485527c035a3050f1647877550a1d4326606eac25bd03b8234204237e76cf
MD5 SHA1 SHA512

Submit Download

a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe

Path C:\Users\Admin\AppData\Local\6b7c1b22-1a0f-4571-8e32-bcb4b82457da\a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803.exe
Size 702KB
SHA256 a4ecbf9d395be341a8a4e042bab9679d4ee6e43f9f9cf1690d88bf277ef09803
MD5 0a71da83060da9e4fffb05b88dc7e457
SHA1 864bcc7ad44100dd602f089969802eff5830c1ad
SHA512 956f1ea296b93f9bc7b6ce9f22cb76213de88528f28ae5a0a03c1ed1d40e816a57861e4e4bc60085bcb67bff341819afd3e3283a32e32ca7e8db6b28ddc27d86
SSDEEP 12288:aJON9tMho1RxtESImBxBt/qp3J0eDEzcLie/4lOOg/R78ECyDM6JdGA:COlSizIm7m3J0sE0j4EJ5aNSdGA
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/824-2-0x0000000004A60000-0x0000000004B7B000-memory.dmp

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memory/824-1-0x00000000048B0000-0x000000000494F000-memory.dmp

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memory/4064-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4064-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4064-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4064-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4064-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4064-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4064-33-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4064-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4064-21-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4064-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5044-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5044-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5044-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5044-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5044-17-0x0000000000400000-0x0000000000537000-memory.dmp

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