djvu | df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6

Analysis

max time kernel
149s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20240412-en
resource tags

arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
submitted
16/04/2024, 00:10

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General

Target
df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe
Size 851KB
Sample240416-af8p2aea4t
SHA256 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6
MD5 23e17bc0ed5de8c26fc0d371d64c3b2c
SHA1 a1f40ed9e90a8d55e3a5167b20191291de65b7f5
SHA512 018d9cfc145b98ff75d4cbc050733448bef77a0d3bbcbe94c3092fb9f5d1369ba8b4c3889cd6aae25a78adcb58ae131a53a695ede1c3cd2bf0593fe31f56e19b
SSDEEP 12288:gAjaxsJPuYbIw0JGZUqqLXHHsmfw+fflslYuDZNVKlc:bjaLOILJGfqL3OWflsldDTsi
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.uajs
offline_id
Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://sajdfue.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/df01994dd8d37c2c33469922f8e7155a20240402134014/fd95b0 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: 0859PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/4560-2-0x0000000004CA0000-0x0000000004DBB000-memory.dmp	family_djvu
behavioral2/memory/3416-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3416-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3416-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3416-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3416-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4136-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4136-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4136-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4136-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4136-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4136-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4136-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4136-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4136-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4136-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4136-39-0x0000000000400000-0x0000000000537000-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
4876	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-1-5-21-3263309122-2820180308-3568046652-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\caee1f84-39e6-4f6b-87df-f63c9fd36865\\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe\" --AutoStart"	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.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
8	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4560 set thread context of 3416	4560	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	80
PID 5052 set thread context of 4136	5052	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	86

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
3416	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe
3416	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe
4136	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe
4136	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4560 wrote to memory of 3416	4560	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	80
PID 4560 wrote to memory of 3416	4560	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	80
PID 4560 wrote to memory of 3416	4560	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	80
PID 4560 wrote to memory of 3416	4560	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	80
PID 4560 wrote to memory of 3416	4560	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	80
PID 4560 wrote to memory of 3416	4560	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	80
PID 4560 wrote to memory of 3416	4560	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	80
PID 4560 wrote to memory of 3416	4560	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	80
PID 4560 wrote to memory of 3416	4560	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	80
PID 4560 wrote to memory of 3416	4560	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	80
PID 3416 wrote to memory of 4876	3416	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	81
PID 3416 wrote to memory of 4876	3416	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	81
PID 3416 wrote to memory of 4876	3416	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	81
PID 3416 wrote to memory of 5052	3416	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	83
PID 3416 wrote to memory of 5052	3416	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	83
PID 3416 wrote to memory of 5052	3416	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	83
PID 5052 wrote to memory of 4136	5052	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	86
PID 5052 wrote to memory of 4136	5052	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	86
PID 5052 wrote to memory of 4136	5052	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	86
PID 5052 wrote to memory of 4136	5052	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	86
PID 5052 wrote to memory of 4136	5052	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	86
PID 5052 wrote to memory of 4136	5052	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	86
PID 5052 wrote to memory of 4136	5052	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	86
PID 5052 wrote to memory of 4136	5052	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	86
PID 5052 wrote to memory of 4136	5052	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	86
PID 5052 wrote to memory of 4136	5052	df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe	86

C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe
"C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4560
- C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe
  "C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3416
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\caee1f84-39e6-4f6b-87df-f63c9fd36865" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4876
- - C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe
    "C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:5052
  - - C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe
      "C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4136

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 54a3267f8825a4819df16f5448a9829081f9030088a02fa981222b43ec0fb392
MD5 a796999c503d181cf67725ed32be3bfe
SHA1 61bed07e1ca6dd7325b65653307671f95cd943bc
SHA512 5856964f0d0b6624577ce69751eab308994ef106eaf1de54fa4544caf362f4fbb94f99ceb4f9865746d01a9edce3dcdd685ad3767d761bdbf591ab20ec88081e
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 b2f950306537270467db9240417c555d064ce6eba0740b7e50744bc99a4407c5
MD5 09d2ec9f18b54b081850fd910f43450a
SHA1 e96c8d825fbaa3af0ffc3cd0b8f002ba77fbe6af
SHA512 5098d1f1b9f6c11f893595d80a70fea5249de949f95845558060c4f56a5f64debb29692b2ccb8ad62431c5351c695f55d378778ec4b75eb5d17977bb2eda057f
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 d935333f61ef10d6923d6bdf0bb9c663ec574ccaf4ec62fc26e9035fb1dc2212
MD5 39fe7b75f674d2c10ae76a07629595ac
SHA1 65475de3143d46835193cead15a839d82c730231
SHA512 c5d11be98a779d956a8a93a737c30f52807dfb49171388cfbd0596e59fef9f1745363370c728a610e13ab3fad3eeb74e2cb931f78ecb81d1a09af9c018b41372
MD5 SHA1 SHA512

Submit Download

df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe

Path C:\Users\Admin\AppData\Local\caee1f84-39e6-4f6b-87df-f63c9fd36865\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe
Size 851KB
SHA256 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6
MD5 23e17bc0ed5de8c26fc0d371d64c3b2c
SHA1 a1f40ed9e90a8d55e3a5167b20191291de65b7f5
SHA512 018d9cfc145b98ff75d4cbc050733448bef77a0d3bbcbe94c3092fb9f5d1369ba8b4c3889cd6aae25a78adcb58ae131a53a695ede1c3cd2bf0593fe31f56e19b
SSDEEP 12288:gAjaxsJPuYbIw0JGZUqqLXHHsmfw+fflslYuDZNVKlc:bjaLOILJGfqL3OWflsldDTsi
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/3416-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3416-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3416-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3416-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3416-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4136-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4136-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4136-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4136-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4136-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4136-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4136-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4136-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4136-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4136-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4136-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4560-1-0x0000000004C00000-0x0000000004C9E000-memory.dmp

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memory/4560-2-0x0000000004CA0000-0x0000000004DBB000-memory.dmp

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memory/5052-21-0x0000000004AF0000-0x0000000004B8D000-memory.dmp

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