djvu | 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761

General

Target

781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
Size

731KB
MD5

2f9fa03e1f9537e0168926a86df09dd9
SHA1

e7ee393bbce53e7ac207b59c6e432558a8f778a1
SHA256

781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761
SHA512

240c75b77ae15afe2277f0393e8fe191487cb8af4b54aadd8b90d464c21ab526e8be687074fa6ea6ed38d83def7a5e960b239ab2d280084129e95321b98cfa28
SSDEEP

12288:n5sbAah9nr2pnjCrddbRUbXV7O5Bt2RAT2lIgAm/jhOkfNCScUQliFIL2:5sfh9nr0jCPEXNcBt2RbqfKIk17cUQsD

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test2/get.php

Attributes

extension
.vehu
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: 0872PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2536-2-0x0000000004AC0000-0x0000000004BDB000-memory.dmp	family_djvu
behavioral2/memory/4936-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4936-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4936-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4936-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4936-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2888-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2888-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2888-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2888-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2888-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2888-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2888-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2888-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2888-37-0x0000000000400000-0x0000000000537000-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

Processes:

icacls.exe

pid process

2564 icacls.exe

pid	process
2564	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3001105534-2705918504-2956618779-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\57891481-03da-4535-8c15-3d96bccf1a17\\781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe\" --AutoStart"	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.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.

Processes:

flow ioc

1 api.2ip.ua
2 api.2ip.ua
10 api.2ip.ua

flow	ioc
1	api.2ip.ua
2	api.2ip.ua
10	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe

description	pid	process	target process
PID 2536 set thread context of 4936	2536	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
PID 2700 set thread context of 2888	2700	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe

pid	process
4936	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
4936	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
2888	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
2888	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe

C:\Users\Admin\AppData\Local\Temp\781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
"C:\Users\Admin\AppData\Local\Temp\781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2536

C:\Users\Admin\AppData\Local\Temp\781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
"C:\Users\Admin\AppData\Local\Temp\781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe"
2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4936

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\57891481-03da-4535-8c15-3d96bccf1a17" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:2564

C:\Users\Admin\AppData\Local\Temp\781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
"C:\Users\Admin\AppData\Local\Temp\781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2700

C:\Users\Admin\AppData\Local\Temp\781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
"C:\Users\Admin\AppData\Local\Temp\781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2888

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

File and Directory Permissions Modification

1

T1222

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize
1KB

MD5
6f6e3fca3096a0e7e7eb59d51f4a5350

SHA1
c978fa12d9045c593d5e7e097037ee465e09c3b2

SHA256
d27a9ba9c11dbd9c2b2bcb61a4128f457e7d15a3db20fad170588821e4003d78

SHA512
c45004cb6359a32eb55f1f2ff762ab948d79991ec890ceaf988d513ff9cd4dc0168deb2235b391b43ca8d69d960ba302fde0ed13a2b0e1dddbd63135f27cb546

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize
724B

MD5
8202a1cd02e7d69597995cabbe881a12

SHA1
8858d9d934b7aa9330ee73de6c476acf19929ff6

SHA256
58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

SHA512
97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize
410B

MD5
f68bcf6fffac786970a9f09f40218d38

SHA1
cd55933c8d0ba272dde7b1902fadbc5891099034

SHA256
1d087faa80f07e418520022fcc144e88f96cb654d51bce6d40f127d9c4894ae0

SHA512
b1144b5691605f2b9f0bc1714563dc61bb6a7a9cf23f1f126d469a4b112e1936955bfb8515bef1efddbcedff9ec14fcfc59ec0d7a8e7749ac75eeec2223be305

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize
392B

MD5
6b29935925c2cf951c08e715257d39f0

SHA1
09c4a2d12c6383d618a4d0499c0a939df0cb127c

SHA256
acccfa105b6c4180178946cca790ab884aea602d646cfba7741f2fd9fad1a2e4

SHA512
36e9de31aead8cc7b1485d660b8e2fab4803c2e6f15c77a90681abb6ee3fa22706c060e25e9450155b44840b249a5c1e97af8ef4b50f9eb179fdc21e66dad631

Download Submit
C:\Users\Admin\AppData\Local\57891481-03da-4535-8c15-3d96bccf1a17\781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
Filesize
731KB

MD5
2f9fa03e1f9537e0168926a86df09dd9

SHA1
e7ee393bbce53e7ac207b59c6e432558a8f778a1

SHA256
781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761

SHA512
240c75b77ae15afe2277f0393e8fe191487cb8af4b54aadd8b90d464c21ab526e8be687074fa6ea6ed38d83def7a5e960b239ab2d280084129e95321b98cfa28

Download Submit
memory/2536-2-0x0000000004AC0000-0x0000000004BDB000-memory.dmp

Filesize
1.1MB

Download
memory/2536-1-0x0000000004A20000-0x0000000004AB3000-memory.dmp

Filesize
588KB

Download
memory/2888-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2888-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2888-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2888-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2888-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2888-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2888-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2888-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2888-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4936-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4936-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4936-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4936-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4936-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 2536 wrote to memory of 4936	2536	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
PID 2536 wrote to memory of 4936	2536	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
PID 2536 wrote to memory of 4936	2536	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
PID 2536 wrote to memory of 4936	2536	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
PID 2536 wrote to memory of 4936	2536	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
PID 2536 wrote to memory of 4936	2536	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
PID 2536 wrote to memory of 4936	2536	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
PID 2536 wrote to memory of 4936	2536	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
PID 2536 wrote to memory of 4936	2536	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
PID 2536 wrote to memory of 4936	2536	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
PID 4936 wrote to memory of 2564	4936	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	icacls.exe
PID 4936 wrote to memory of 2564	4936	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	icacls.exe
PID 4936 wrote to memory of 2564	4936	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	icacls.exe
PID 4936 wrote to memory of 2700	4936	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
PID 4936 wrote to memory of 2700	4936	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
PID 4936 wrote to memory of 2700	4936	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
PID 2700 wrote to memory of 2888	2700	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
PID 2700 wrote to memory of 2888	2700	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
PID 2700 wrote to memory of 2888	2700	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
PID 2700 wrote to memory of 2888	2700	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
PID 2700 wrote to memory of 2888	2700	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
PID 2700 wrote to memory of 2888	2700	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
PID 2700 wrote to memory of 2888	2700	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
PID 2700 wrote to memory of 2888	2700	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
PID 2700 wrote to memory of 2888	2700	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
PID 2700 wrote to memory of 2888	2700	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe	781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads