djvu | aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de

Analysis

max time kernel
147s
max time network
150s
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, 16:06

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General

Target
aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe
Size 769KB
Sample240416-tj7fxsec95
SHA256 aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de
MD5 38c0f069a64870ec75461afc5be767d0
SHA1 a61437b454b1f0f0d119e8c783e4d8b5d9b372df
SHA512 74a93c12de04f33cdf2ee5f3b2ebdd92887f29a4feb9a6b0996a0e394ad318da3ef06c812d950cec2bb1285fbdf83f2806ff6b77e58a253ce3498c69cd40dfd0
SSDEEP 12288:T/XhdatUv+0luNc8rK24QE9mH+ntbKUNB1c/yAluFOVWjgz4QhU5I:j+twl4BaQERkU3H6WjiQ5I
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/5040-2-0x0000000004BC0000-0x0000000004CDB000-memory.dmp	family_djvu
behavioral2/memory/4120-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4120-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4120-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4120-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4120-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4824-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4824-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4824-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4824-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4824-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4824-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4824-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4824-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4824-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4824-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4824-39-0x0000000000400000-0x0000000000537000-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
4420	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-1-5-21-801765966-3955847401-2235691403-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\48c3e676-8403-40a9-9478-84c85980e2fa\\aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe\" --AutoStart"	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.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
7	api.2ip.ua
1	api.2ip.ua
2	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 5040 set thread context of 4120	5040	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	79
PID 5116 set thread context of 4824	5116	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.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
4120	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe
4120	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe
4824	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe
4824	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 5040 wrote to memory of 4120	5040	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	79
PID 5040 wrote to memory of 4120	5040	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	79
PID 5040 wrote to memory of 4120	5040	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	79
PID 5040 wrote to memory of 4120	5040	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	79
PID 5040 wrote to memory of 4120	5040	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	79
PID 5040 wrote to memory of 4120	5040	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	79
PID 5040 wrote to memory of 4120	5040	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	79
PID 5040 wrote to memory of 4120	5040	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	79
PID 5040 wrote to memory of 4120	5040	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	79
PID 5040 wrote to memory of 4120	5040	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	79
PID 4120 wrote to memory of 4420	4120	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	81
PID 4120 wrote to memory of 4420	4120	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	81
PID 4120 wrote to memory of 4420	4120	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	81
PID 4120 wrote to memory of 5116	4120	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	82
PID 4120 wrote to memory of 5116	4120	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	82
PID 4120 wrote to memory of 5116	4120	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	82
PID 5116 wrote to memory of 4824	5116	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	85
PID 5116 wrote to memory of 4824	5116	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	85
PID 5116 wrote to memory of 4824	5116	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	85
PID 5116 wrote to memory of 4824	5116	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	85
PID 5116 wrote to memory of 4824	5116	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	85
PID 5116 wrote to memory of 4824	5116	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	85
PID 5116 wrote to memory of 4824	5116	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	85
PID 5116 wrote to memory of 4824	5116	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	85
PID 5116 wrote to memory of 4824	5116	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	85
PID 5116 wrote to memory of 4824	5116	aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe	85

C:\Users\Admin\AppData\Local\Temp\aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe
"C:\Users\Admin\AppData\Local\Temp\aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5040
- C:\Users\Admin\AppData\Local\Temp\aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe
  "C:\Users\Admin\AppData\Local\Temp\aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4120
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\48c3e676-8403-40a9-9478-84c85980e2fa" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4420
- - C:\Users\Admin\AppData\Local\Temp\aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe
    "C:\Users\Admin\AppData\Local\Temp\aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:5116
  - - C:\Users\Admin\AppData\Local\Temp\aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe
      "C:\Users\Admin\AppData\Local\Temp\aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4824

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 7eb17f03f49ad906d62f715fe4e81e9341f8e7e900e429bc83d0787340dfa42f
MD5 8a19e2f05bb9c727f7fb24ef7e6541e7
SHA1 fc4e212ec0c090fffc2c1b9c70fe5cb6c77592db
SHA512 82b40631302b2338d74c48aaf0b848435020936eb99a1945a6a5397e123a6107eb5681d458595af641d4078383de41370afc882d94aec89e4c65f51e86c4c0d4
MD5 SHA1 SHA512

Submit Download

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

Submit Download

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 d12cc2e856cd48a99970d7b22d48e31e057f42429f880f22cf33b96357b81414
MD5 5710b12e590ff72f19056fe10a2d76de
SHA1 60bc4e83d8c3a345215611ac516b59e07d85e8ee
SHA512 5d52fb4fb775f61a2fc96de2cedee9a35309765beb0384b2150096e3c8c1cff55337bfdc57ab9846f59ba9c44dda1f1f929e414581c8583527f39bba0153750f
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 515726968f0151b828d357fabac6011aa81f0cf54e0e2cdcc190d6eaa6335637
MD5 098a8a7d51b3eb38e6227643c5ac86b3
SHA1 a2c74e0a9373ace90918e4098d6340f9f0d99235
SHA512 34fc856e04aff8be78da0c5a3effceae7f58d7d167a10bc276636e6a40d3520da41475f8f761c83f09f2bb2c447cacf4a6adea42ba93d1f54dbc976d312cdbd2
MD5 SHA1 SHA512

Submit Download

aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe

Path C:\Users\Admin\AppData\Local\48c3e676-8403-40a9-9478-84c85980e2fa\aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de.exe
Size 769KB
SHA256 aab4c0bb23c734e34fd9cfe1fb0308f4d9e33ca4bc6a8b0e3dc92ddc940601de
MD5 38c0f069a64870ec75461afc5be767d0
SHA1 a61437b454b1f0f0d119e8c783e4d8b5d9b372df
SHA512 74a93c12de04f33cdf2ee5f3b2ebdd92887f29a4feb9a6b0996a0e394ad318da3ef06c812d950cec2bb1285fbdf83f2806ff6b77e58a253ce3498c69cd40dfd0
SSDEEP 12288:T/XhdatUv+0luNc8rK24QE9mH+ntbKUNB1c/yAluFOVWjgz4QhU5I:j+twl4BaQERkU3H6WjiQ5I
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/4120-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4120-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4120-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4120-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4120-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4824-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4824-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4824-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4824-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4824-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4824-37-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4824-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4824-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4824-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4824-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4824-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5040-2-0x0000000004BC0000-0x0000000004CDB000-memory.dmp

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memory/5040-1-0x0000000003040000-0x00000000030DB000-memory.dmp

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memory/5116-20-0x0000000002FC0000-0x0000000003058000-memory.dmp

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