djvu | 0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb

Analysis

max time kernel
144s
max time network
124s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
23/05/2024, 02:52

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General

Target
0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe
Size 711KB
Sample240523-dc4tfsbc7t
SHA256 0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb
MD5 2fe74589699ad8b98b23c473414a5c6a
SHA1 84b1ab6c53ce76ca7c8710a3fc943f12c260adaa
SHA512 2a473345343ee3869687cdde79921f9c6c9300d65e14056ad63788dd2459883c65ada384d15f6cc66ff09763ac52703314efba8175acba90ba0f8623be5350b5
SSDEEP 12288:Q972r9a2oBGCKmQltAg2toQoB4YfxKogqv5MuY:Q9KrDmQDAghxKov5Z
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 15 IoCs

resource	yara_rule
behavioral2/memory/1788-2-0x0000000004AC0000-0x0000000004BDB000-memory.dmp	family_djvu
behavioral2/memory/3020-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3020-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3020-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3020-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3020-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3392-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3392-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3392-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3392-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3392-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3392-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3392-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3392-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3392-37-0x0000000000400000-0x0000000000537000-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
2888	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-1-5-21-2551177587-3778486488-1329702901-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f131942c-7c59-4152-bc4c-ff8a9235187b\\0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe\" --AutoStart"	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.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 1788 set thread context of 3020	1788	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	77
PID 848 set thread context of 3392	848	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	82

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
3020	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe
3020	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe
3392	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe
3392	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1788 wrote to memory of 3020	1788	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	77
PID 1788 wrote to memory of 3020	1788	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	77
PID 1788 wrote to memory of 3020	1788	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	77
PID 1788 wrote to memory of 3020	1788	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	77
PID 1788 wrote to memory of 3020	1788	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	77
PID 1788 wrote to memory of 3020	1788	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	77
PID 1788 wrote to memory of 3020	1788	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	77
PID 1788 wrote to memory of 3020	1788	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	77
PID 1788 wrote to memory of 3020	1788	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	77
PID 1788 wrote to memory of 3020	1788	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	77
PID 3020 wrote to memory of 2888	3020	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	78
PID 3020 wrote to memory of 2888	3020	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	78
PID 3020 wrote to memory of 2888	3020	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	78
PID 3020 wrote to memory of 848	3020	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	79
PID 3020 wrote to memory of 848	3020	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	79
PID 3020 wrote to memory of 848	3020	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	79
PID 848 wrote to memory of 3392	848	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	82
PID 848 wrote to memory of 3392	848	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	82
PID 848 wrote to memory of 3392	848	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	82
PID 848 wrote to memory of 3392	848	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	82
PID 848 wrote to memory of 3392	848	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	82
PID 848 wrote to memory of 3392	848	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	82
PID 848 wrote to memory of 3392	848	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	82
PID 848 wrote to memory of 3392	848	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	82
PID 848 wrote to memory of 3392	848	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	82
PID 848 wrote to memory of 3392	848	0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe	82

C:\Users\Admin\AppData\Local\Temp\0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe
"C:\Users\Admin\AppData\Local\Temp\0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1788
- C:\Users\Admin\AppData\Local\Temp\0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe
  "C:\Users\Admin\AppData\Local\Temp\0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3020
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\f131942c-7c59-4152-bc4c-ff8a9235187b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2888
- - C:\Users\Admin\AppData\Local\Temp\0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe
    "C:\Users\Admin\AppData\Local\Temp\0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:848
  - - C:\Users\Admin\AppData\Local\Temp\0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe
      "C:\Users\Admin\AppData\Local\Temp\0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:3392

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 4737de49245ace1ca1fdeaacd5feee9bbda88bc6f42c84a1ea7d316383792cf8
MD5 7575c39a544943a68ce6e709c586005a
SHA1 4874b30bd1d455b28a95c4e21c5aecd1ea043d7a
SHA512 abf3d85393725113e720cbe8980b369236511e3984e8cbfa795f19bb5d6e39822e80a835caeb498581797a74b349765ba1a27f26586a17a66ae1c88bd066a3d1
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 0939c502dc7989a054ccc4828af7696111edbf6ac3092aef7c9b576a87ff53b2
MD5 21190b226eea4531c925900d8ca8de01
SHA1 858e19bbd2c4a82a2f741d54f7702ef13f412133
SHA512 ce500f3a31abf920ceba0b6a61dd05af145c43f2e05389a454b9f6ffdabd944a5bc8ec7cb2a8605349e131da23e6b69df7e93f7b1d9102f0fab7d6cee01ba6c0
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 59bc81143d8b4cd785b6324c19bec4dffcebd4706a61b83dc63ac7e96b2a10d3
MD5 97b34eb802f6843c1079951f1b537f66
SHA1 f169349c0bf5b70e7e54f3a3b12543b81898d935
SHA512 fbf393eb25d63e32a73f42222e4057a45fb304339e0d47600b0fa1c8a43c11e6294f5e89563930d60b8a8e4b77a6e9e03f84c525e50a07fa72935fde4ae06d75
MD5 SHA1 SHA512

Submit Download

0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe

Path C:\Users\Admin\AppData\Local\f131942c-7c59-4152-bc4c-ff8a9235187b\0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb.exe
Size 711KB
SHA256 0f5bae947e7f1d88edbea521ebd44f9712a4cd63176b79258816d4135fae48fb
MD5 2fe74589699ad8b98b23c473414a5c6a
SHA1 84b1ab6c53ce76ca7c8710a3fc943f12c260adaa
SHA512 2a473345343ee3869687cdde79921f9c6c9300d65e14056ad63788dd2459883c65ada384d15f6cc66ff09763ac52703314efba8175acba90ba0f8623be5350b5
SSDEEP 12288:Q972r9a2oBGCKmQltAg2toQoB4YfxKogqv5MuY:Q9KrDmQDAghxKov5Z
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1788-2-0x0000000004AC0000-0x0000000004BDB000-memory.dmp

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memory/1788-1-0x0000000004A10000-0x0000000004AB1000-memory.dmp

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memory/3020-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3020-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3020-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3020-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3020-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3392-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3392-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3392-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3392-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3392-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3392-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3392-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3392-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3392-37-0x0000000000400000-0x0000000000537000-memory.dmp

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