djvu | c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818

Analysis

max time kernel
295s
max time network
188s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
30/05/2024, 23:26

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General

Target
c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe
Size 785KB
Sample240530-3e18safa46
SHA256 c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818
MD5 94d752dd8840a6dace193f71dac6a879
SHA1 55c350d6572cd2f0b11b223377bb3d07c8737bd2
SHA512 2de71c0be7bc6d14174f3f92fe45a3934097968779df2d8def2ac61b18e3bc6dc9e71d3749b72396d0d29dc707d304fdde488e1b782cdadf8a87d740408deb37
SSDEEP 12288:NjOO09MQzkOGDn+x4AV3hf/t3+lSnX3Cir9xtFRGFRrv4C7Ln5hmAftYK1oBmj:1htDvQN3+l8XNrdFIrwCn+AfGK1m
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.vepi
offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
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/33b490a613f49fa190924f199d2c079e20240512191214/caaf73 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: 0871PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral2/memory/2284-2-0x0000000003D90000-0x0000000003EAB000-memory.dmp	family_djvu
behavioral2/memory/2608-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2608-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2608-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2608-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2608-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4220-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4220-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4220-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4220-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4220-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4220-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4220-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4220-36-0x0000000000400000-0x0000000000537000-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
4640	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-1-5-21-1739856679-3467441365-73334005-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\b0987424-19b0-4766-9efc-1032a4471c69\\c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe\" --AutoStart"	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.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 2284 set thread context of 2608	2284	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	74
PID 3844 set thread context of 4220	3844	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	78

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
2608	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe
2608	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe
4220	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe
4220	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2284 wrote to memory of 2608	2284	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	74
PID 2284 wrote to memory of 2608	2284	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	74
PID 2284 wrote to memory of 2608	2284	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	74
PID 2284 wrote to memory of 2608	2284	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	74
PID 2284 wrote to memory of 2608	2284	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	74
PID 2284 wrote to memory of 2608	2284	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	74
PID 2284 wrote to memory of 2608	2284	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	74
PID 2284 wrote to memory of 2608	2284	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	74
PID 2284 wrote to memory of 2608	2284	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	74
PID 2284 wrote to memory of 2608	2284	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	74
PID 2608 wrote to memory of 4640	2608	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	75
PID 2608 wrote to memory of 4640	2608	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	75
PID 2608 wrote to memory of 4640	2608	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	75
PID 2608 wrote to memory of 3844	2608	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	76
PID 2608 wrote to memory of 3844	2608	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	76
PID 2608 wrote to memory of 3844	2608	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	76
PID 3844 wrote to memory of 4220	3844	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	78
PID 3844 wrote to memory of 4220	3844	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	78
PID 3844 wrote to memory of 4220	3844	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	78
PID 3844 wrote to memory of 4220	3844	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	78
PID 3844 wrote to memory of 4220	3844	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	78
PID 3844 wrote to memory of 4220	3844	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	78
PID 3844 wrote to memory of 4220	3844	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	78
PID 3844 wrote to memory of 4220	3844	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	78
PID 3844 wrote to memory of 4220	3844	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	78
PID 3844 wrote to memory of 4220	3844	c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe	78

C:\Users\Admin\AppData\Local\Temp\c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe
"C:\Users\Admin\AppData\Local\Temp\c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2284
- C:\Users\Admin\AppData\Local\Temp\c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe
  "C:\Users\Admin\AppData\Local\Temp\c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2608
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\b0987424-19b0-4766-9efc-1032a4471c69" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4640
- - C:\Users\Admin\AppData\Local\Temp\c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe
    "C:\Users\Admin\AppData\Local\Temp\c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3844
  - - C:\Users\Admin\AppData\Local\Temp\c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe
      "C:\Users\Admin\AppData\Local\Temp\c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4220

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 d10478a42647f37ccbe419912d8ce3d35ccb84b5e83d8fce98d0b9baad81ccfe
MD5 03c0f8ee77d876972cda274ac80f5e52
SHA1 a42ee63d82fae2390b4a3ee55dcaea356bc4e0d3
SHA512 9d4c9deb0185c342cb20c17503e459a460313fd599a58e3a0e34c5e202bd4e44cf67f96275291eee922c55407404e71822bd5ae9924808544c3461e4e0080faa
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 e41dc1362bd0dc6c8b627a041a82952d97805dde628564a055e560c9dc23c365
MD5 2b0117db4f81b25a1bd22051aeb8de47
SHA1 dd02e8ceca6b66c8717d88b12a0fc632aef2a96d
SHA512 2d16186ccbc76497355ff049f000a0313ff6f66ad86f477bf2228cee6ba9e3c8e17a9380d25e95b1fe0fb1800b19837bda438eee3f8f724305efa80dc20d8aae
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 2e3b64d0212758e31b5fc1652c9c85458d82491c457976183c245b074fd0e1c5
MD5 754f1141457663915173aa64b55eab88
SHA1 b153e7f95fe10cfc6954bc52b8194bb6c2366b02
SHA512 9790c88e26c88e5a5ee70a37536b0356be014e1fc00784b13184c02228f1e0d627dd6db8a5a63c59111dddd4f5e72ba6ca8a1c1be20bd4b22236143cf32cae89
MD5 SHA1 SHA512

Submit Download

c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe

Path C:\Users\Admin\AppData\Local\b0987424-19b0-4766-9efc-1032a4471c69\c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818.exe
Size 785KB
SHA256 c0d87e5453b502802db71834980da0c57bec9e8452a740b46729eda91b43c818
MD5 94d752dd8840a6dace193f71dac6a879
SHA1 55c350d6572cd2f0b11b223377bb3d07c8737bd2
SHA512 2de71c0be7bc6d14174f3f92fe45a3934097968779df2d8def2ac61b18e3bc6dc9e71d3749b72396d0d29dc707d304fdde488e1b782cdadf8a87d740408deb37
SSDEEP 12288:NjOO09MQzkOGDn+x4AV3hf/t3+lSnX3Cir9xtFRGFRrv4C7Ln5hmAftYK1oBmj:1htDvQN3+l8XNrdFIrwCn+AfGK1m
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2284-2-0x0000000003D90000-0x0000000003EAB000-memory.dmp

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memory/2284-1-0x0000000002150000-0x00000000021EA000-memory.dmp

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memory/2608-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2608-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2608-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2608-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2608-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4220-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4220-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4220-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4220-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4220-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4220-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4220-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4220-36-0x0000000000400000-0x0000000000537000-memory.dmp

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