djvu | 2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12

Analysis

max time kernel
294s
max time network
256s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
09/05/2024, 22:46

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General

Target
2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe
Size 730KB
Sample240509-2p5taaba6z
SHA256 2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12
MD5 9ba94ba3651f466b6819b6e36bd5ef08
SHA1 ebd7d5ccb991280241eb27b2e4a3a84f0a1a22cb
SHA512 96557623c8d696187902155994fe12747ff8be160e2814ef12c5b28ac3ceaf0c074d70809d7aa0846702b11660a3b66e538f7533ea1d60d248e7ff2877c09981
SSDEEP 12288:Aa4NU9+jvuJ+B2adzl/GSiCrZ87cy2mIqkr7qBhaDlAealsv4x/FQihH+jWrJ:AXCo2an/htyt11faG8ici
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.qepi
offline_id
jgILOjDrBgyzY4JmT3B2jDSyBmDPBruKk8bKs6t1
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/665ddae3fc3cd10bbaaa4350408b196920240504141005/4cae7e 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: 0867PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral2/memory/4360-2-0x0000000003780000-0x000000000389B000-memory.dmp	family_djvu
behavioral2/memory/5028-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5028-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5028-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5028-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5028-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3340-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3340-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3340-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3340-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3340-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3340-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3340-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3340-36-0x0000000000400000-0x0000000000537000-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
2184	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-1-5-21-3699363923-1875576828-3287151903-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\1a3a99cb-9509-4389-94c9-5d08eaa203d3\\2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe\" --AutoStart"	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.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
9	api.2ip.ua
1	api.2ip.ua
2	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4360 set thread context of 5028	4360	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	75
PID 3228 set thread context of 3340	3228	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	79

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
5028	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe
5028	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe
3340	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe
3340	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4360 wrote to memory of 5028	4360	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	75
PID 4360 wrote to memory of 5028	4360	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	75
PID 4360 wrote to memory of 5028	4360	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	75
PID 4360 wrote to memory of 5028	4360	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	75
PID 4360 wrote to memory of 5028	4360	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	75
PID 4360 wrote to memory of 5028	4360	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	75
PID 4360 wrote to memory of 5028	4360	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	75
PID 4360 wrote to memory of 5028	4360	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	75
PID 4360 wrote to memory of 5028	4360	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	75
PID 4360 wrote to memory of 5028	4360	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	75
PID 5028 wrote to memory of 2184	5028	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	76
PID 5028 wrote to memory of 2184	5028	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	76
PID 5028 wrote to memory of 2184	5028	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	76
PID 5028 wrote to memory of 3228	5028	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	77
PID 5028 wrote to memory of 3228	5028	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	77
PID 5028 wrote to memory of 3228	5028	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	77
PID 3228 wrote to memory of 3340	3228	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	79
PID 3228 wrote to memory of 3340	3228	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	79
PID 3228 wrote to memory of 3340	3228	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	79
PID 3228 wrote to memory of 3340	3228	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	79
PID 3228 wrote to memory of 3340	3228	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	79
PID 3228 wrote to memory of 3340	3228	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	79
PID 3228 wrote to memory of 3340	3228	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	79
PID 3228 wrote to memory of 3340	3228	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	79
PID 3228 wrote to memory of 3340	3228	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	79
PID 3228 wrote to memory of 3340	3228	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	79

C:\Users\Admin\AppData\Local\Temp\2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe
"C:\Users\Admin\AppData\Local\Temp\2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4360
- C:\Users\Admin\AppData\Local\Temp\2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe
  "C:\Users\Admin\AppData\Local\Temp\2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:5028
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\1a3a99cb-9509-4389-94c9-5d08eaa203d3" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2184
- - C:\Users\Admin\AppData\Local\Temp\2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe
    "C:\Users\Admin\AppData\Local\Temp\2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3228
  - - C:\Users\Admin\AppData\Local\Temp\2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe
      "C:\Users\Admin\AppData\Local\Temp\2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:3340

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 b50c616b5c29bd9611ed360a238b6b6c421d0fe3b85df331e4951aefab526b2e
MD5 5857aff0ea0365561d0f06769a04101c
SHA1 0ac570f0ec93618c5849baf94c0a167e4a706a95
SHA512 1863b40407893a4a26beaa7ae4add199676c15b633d59afb4dfd2906328b29497fdddcb0ff01b9ba77ac59c5c55511fa669b0ffd6e02bcfa2d2cc53df62390be
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

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24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 23467d22087d633a536e757425fee6f94d945870e5029d0c7b7ec1369c3a4220
MD5 6ebfb4fd80003330055975048ed5d858
SHA1 69f22e220283930624a4438a12003ad62517c872
SHA512 d659e1818133bc9749e0a6faf73d4d34818b7f52e5d3ea9f81f481407244e56821ef66fcfdd1a1c20676cf4ce96da8af77bc3b4f7dca58fe922cb12723140e75
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 6959a3e33947ff90dd2bbd6082eb2214ecbd36a3a915a27ca3e30c08fdc9e9ca
MD5 32d86eb7c2143672b217dba0168a5d93
SHA1 30d295ad63b6cf03886f05da75e361192241576a
SHA512 a02a1de68269fe978e8781d639f5d11a05a98dbbfb3e35a169fd51291f312fc74a69ae5fa728ee524ba1bf8656afb76823d54f739f3aa96b89980d814c0f91ae
MD5 SHA1 SHA512

Submit Download

2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe

Path C:\Users\Admin\AppData\Local\1a3a99cb-9509-4389-94c9-5d08eaa203d3\2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe
Size 730KB
SHA256 2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12
MD5 9ba94ba3651f466b6819b6e36bd5ef08
SHA1 ebd7d5ccb991280241eb27b2e4a3a84f0a1a22cb
SHA512 96557623c8d696187902155994fe12747ff8be160e2814ef12c5b28ac3ceaf0c074d70809d7aa0846702b11660a3b66e538f7533ea1d60d248e7ff2877c09981
SSDEEP 12288:Aa4NU9+jvuJ+B2adzl/GSiCrZ87cy2mIqkr7qBhaDlAealsv4x/FQihH+jWrJ:AXCo2an/htyt11faG8ici
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/3340-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3340-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3340-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3340-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3340-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3340-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3340-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3340-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4360-1-0x00000000036E0000-0x0000000003776000-memory.dmp

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memory/4360-2-0x0000000003780000-0x000000000389B000-memory.dmp

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memory/5028-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5028-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5028-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5028-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5028-19-0x0000000000400000-0x0000000000537000-memory.dmp

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