djvu | e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b

Analysis

max time kernel
292s
max time network
244s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
02/05/2024, 00:07

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General

Target
e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe
Size 712KB
Sample240502-aes8ysbb4w
SHA256 e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b
MD5 235859607c95b2b2ac0f37f22bf42b5c
SHA1 26e05a742e98cb08c27a3263bd2da9e97c72499f
SHA512 814a7d94060cfb858ce9264cde64452908bf3e6c0fc0173df23665f00a520073ab768fac825953de25d782743c5f2e73e2e2fb831744b41975bf058499bbe80e
SSDEEP 12288:dYQ2hjiPlbGHVoIpNfqIwzeDBhUs2X3ntutftYN7Wv4:dYQ2RiNcLTqIwziBysC9jNK
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 14 IoCs

resource	yara_rule
behavioral2/memory/4092-2-0x00000000048F0000-0x0000000004A0B000-memory.dmp	family_djvu
behavioral2/memory/4476-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4476-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4476-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4476-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4476-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1876-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1876-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1876-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1876-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1876-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1876-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1876-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1876-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

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

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4308	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-1-5-21-1687926120-3022217735-1146543763-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\84ef3f59-818c-4476-8ccb-01c4e2b6a38e\\e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe\" --AutoStart"	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.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
1	api.2ip.ua
2	api.2ip.ua
10	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4092 set thread context of 4476	4092	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	73
PID 1620 set thread context of 1876	1620	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	77

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
4476	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe
4476	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe
1876	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe
1876	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4092 wrote to memory of 4476	4092	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	73
PID 4092 wrote to memory of 4476	4092	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	73
PID 4092 wrote to memory of 4476	4092	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	73
PID 4092 wrote to memory of 4476	4092	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	73
PID 4092 wrote to memory of 4476	4092	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	73
PID 4092 wrote to memory of 4476	4092	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	73
PID 4092 wrote to memory of 4476	4092	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	73
PID 4092 wrote to memory of 4476	4092	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	73
PID 4092 wrote to memory of 4476	4092	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	73
PID 4092 wrote to memory of 4476	4092	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	73
PID 4476 wrote to memory of 4308	4476	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	74
PID 4476 wrote to memory of 4308	4476	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	74
PID 4476 wrote to memory of 4308	4476	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	74
PID 4476 wrote to memory of 1620	4476	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	75
PID 4476 wrote to memory of 1620	4476	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	75
PID 4476 wrote to memory of 1620	4476	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	75
PID 1620 wrote to memory of 1876	1620	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	77
PID 1620 wrote to memory of 1876	1620	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	77
PID 1620 wrote to memory of 1876	1620	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	77
PID 1620 wrote to memory of 1876	1620	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	77
PID 1620 wrote to memory of 1876	1620	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	77
PID 1620 wrote to memory of 1876	1620	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	77
PID 1620 wrote to memory of 1876	1620	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	77
PID 1620 wrote to memory of 1876	1620	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	77
PID 1620 wrote to memory of 1876	1620	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	77
PID 1620 wrote to memory of 1876	1620	e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe	77

C:\Users\Admin\AppData\Local\Temp\e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe
"C:\Users\Admin\AppData\Local\Temp\e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4092
- C:\Users\Admin\AppData\Local\Temp\e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe
  "C:\Users\Admin\AppData\Local\Temp\e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4476
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\84ef3f59-818c-4476-8ccb-01c4e2b6a38e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4308
- - C:\Users\Admin\AppData\Local\Temp\e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe
    "C:\Users\Admin\AppData\Local\Temp\e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1620
  - - C:\Users\Admin\AppData\Local\Temp\e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe
      "C:\Users\Admin\AppData\Local\Temp\e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1876

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

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 719698173bbfbb3375c5e0c43342f785c76727fcd6560364e0d9bec77232a6f5
MD5 56282e3f56542f67e60909a4345c5a35
SHA1 1a627ec9980ee9e3f5846da3b63552122032f78b
SHA512 291a1569239659ae5c1466d324f6c0114653f2b1578e59f1f340decf189aa38ccf9599c2005551e09ce94f2bceb94f64773181fc011dc1167edd4aa9b1b4d11e
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 dcc6a5c82ea59ada417e167c08c3ed1992fc0ae3d97a744985430978bd7b6cd2
MD5 bd30c99d90276022c5a6c5d2e388af67
SHA1 355a72aa2fa1b5ee550df281e4bb00b8f7a98c40
SHA512 aa78579101331a8ead57abd90676aac9e10980d97b0424e2c88108808ba75bcb1c70d21ba2c8c1c4e2cb886046e143585377720871d0d181f5e11f306058c89d
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 4b3ab0f805b5bf053c4144a26a9d768c07fe25c3a6b90c889457b041c5b7d2d3
MD5 7f9a9e01655bac1beea23840c5f7ebc7
SHA1 13c5c164bb49b1d5217a77b7770b51f5c3c90ec8
SHA512 403fa6c2c40cb0679dac2426bb883a7649c536a5a0bbc3a8a208971c8a09a73cac36aab3f730e0cde003c9b51fbc78154e366e2e9b33098b765e5fb559a2f411
MD5 SHA1 SHA512

Submit Download

e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe

Path C:\Users\Admin\AppData\Local\84ef3f59-818c-4476-8ccb-01c4e2b6a38e\e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b.exe
Size 712KB
SHA256 e10ac2aff2e9fcce248384cf6c18f2426ff6e6b44ceb995d8ce53770ef18f11b
MD5 235859607c95b2b2ac0f37f22bf42b5c
SHA1 26e05a742e98cb08c27a3263bd2da9e97c72499f
SHA512 814a7d94060cfb858ce9264cde64452908bf3e6c0fc0173df23665f00a520073ab768fac825953de25d782743c5f2e73e2e2fb831744b41975bf058499bbe80e
SSDEEP 12288:dYQ2hjiPlbGHVoIpNfqIwzeDBhUs2X3ntutftYN7Wv4:dYQ2RiNcLTqIwziBysC9jNK
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1876-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1876-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1876-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1876-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1876-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1876-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1876-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1876-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4092-1-0x00000000030B0000-0x000000000314B000-memory.dmp

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memory/4092-2-0x00000000048F0000-0x0000000004A0B000-memory.dmp

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memory/4476-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4476-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4476-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4476-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4476-19-0x0000000000400000-0x0000000000537000-memory.dmp

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