djvu | 3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79

General

Target

3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
Size

731KB
MD5

aa5291d560143c65f0d66deaf6174a23
SHA1

c2113249a419bb6a64eb5fe11c2638a3410c2fbe
SHA256

3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79
SHA512

d4595f0009cb47e3ec3c16ad917c1d579e58cb52ddb0150e58f4644e04dfe766cd7d55167580100ed77cda898d5ecc86b05fdc07a891f6a6abaac37656baf6d8
SSDEEP

12288:sTkDplz6BFXqo9coM/FsSZAnluvsJMJMEagjlXPRsTm9HphZnUeCJHGdhrLxUt3K:sTkDplz6+qcoMtsIQhu7lXPRMm9DJOM3

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/4748-2-0x0000000004AE0000-0x0000000004BFB000-memory.dmp	family_djvu
behavioral2/memory/1220-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1220-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1220-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1220-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1220-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/424-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/424-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/424-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/424-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/424-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/424-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/424-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/424-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/424-37-0x0000000000400000-0x0000000000537000-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

2620 icacls.exe

pid	process
2620	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3107365284-1576850094-161165143-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\c034e2a6-2b6a-461d-b4b9-5e4712e138db\\3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe\" --AutoStart"	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.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

8 api.2ip.ua
1 api.2ip.ua
2 api.2ip.ua

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

Suspicious use of SetThreadContext 2 IoCs

Processes:

3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe

description	pid	process	target process
PID 4748 set thread context of 1220	4748	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
PID 1708 set thread context of 424	1708	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.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:

3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe

pid	process
1220	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
1220	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
424	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
424	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe

C:\Users\Admin\AppData\Local\Temp\3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
"C:\Users\Admin\AppData\Local\Temp\3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4748

C:\Users\Admin\AppData\Local\Temp\3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
"C:\Users\Admin\AppData\Local\Temp\3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe"
2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1220

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\c034e2a6-2b6a-461d-b4b9-5e4712e138db" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:2620

C:\Users\Admin\AppData\Local\Temp\3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
"C:\Users\Admin\AppData\Local\Temp\3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1708

C:\Users\Admin\AppData\Local\Temp\3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
"C:\Users\Admin\AppData\Local\Temp\3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:424

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
35c274c26caf6e829239a0dd0d6ddc28

SHA1
aa8f10495fbe4a4a50f9de5d89828ed814324c22

SHA256
deb574bc038638d5204d3be12986fb6ec0c2a10747b7e339dc557347fe16ceb0

SHA512
df758be1d2c6d7b9f58dea9157b3f7af2401b34a7c04ebc29d8c06ee0d3fdcfd4c8087d2f26652be89de29cd410637ef5c6c902d7effd06f19419ad542eae208

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

MD5
f30c4cf53437104d316647241c5bf1f0

SHA1
95731d1031de517b55393f067e5868424c2b05b5

SHA256
5932803717ff44da65ef20d3cddf79392b496d1a8be382440f956e5d11a9031e

SHA512
ed08d62603dd79e71d2a24f2e9ee8010584c715e5c5e6eb911c3a5c4f150794254b3a253da556de211ac7c9bafd20098f25954e4b18511119c625fd629531f0d

Download Submit
C:\Users\Admin\AppData\Local\c034e2a6-2b6a-461d-b4b9-5e4712e138db\3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
Filesize
731KB

MD5
aa5291d560143c65f0d66deaf6174a23

SHA1
c2113249a419bb6a64eb5fe11c2638a3410c2fbe

SHA256
3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79

SHA512
d4595f0009cb47e3ec3c16ad917c1d579e58cb52ddb0150e58f4644e04dfe766cd7d55167580100ed77cda898d5ecc86b05fdc07a891f6a6abaac37656baf6d8

Download Submit
memory/424-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/424-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/424-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/424-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/424-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/424-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/424-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/424-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/424-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1220-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1220-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1220-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1220-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1220-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4748-2-0x0000000004AE0000-0x0000000004BFB000-memory.dmp

Filesize
1.1MB

Download
memory/4748-1-0x0000000004A40000-0x0000000004AD6000-memory.dmp

Filesize
600KB

Download

description	pid	process	target process
PID 4748 wrote to memory of 1220	4748	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
PID 4748 wrote to memory of 1220	4748	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
PID 4748 wrote to memory of 1220	4748	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
PID 4748 wrote to memory of 1220	4748	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
PID 4748 wrote to memory of 1220	4748	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
PID 4748 wrote to memory of 1220	4748	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
PID 4748 wrote to memory of 1220	4748	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
PID 4748 wrote to memory of 1220	4748	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
PID 4748 wrote to memory of 1220	4748	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
PID 4748 wrote to memory of 1220	4748	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
PID 1220 wrote to memory of 2620	1220	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	icacls.exe
PID 1220 wrote to memory of 2620	1220	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	icacls.exe
PID 1220 wrote to memory of 2620	1220	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	icacls.exe
PID 1220 wrote to memory of 1708	1220	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
PID 1220 wrote to memory of 1708	1220	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
PID 1220 wrote to memory of 1708	1220	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
PID 1708 wrote to memory of 424	1708	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
PID 1708 wrote to memory of 424	1708	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
PID 1708 wrote to memory of 424	1708	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
PID 1708 wrote to memory of 424	1708	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
PID 1708 wrote to memory of 424	1708	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
PID 1708 wrote to memory of 424	1708	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
PID 1708 wrote to memory of 424	1708	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
PID 1708 wrote to memory of 424	1708	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
PID 1708 wrote to memory of 424	1708	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe
PID 1708 wrote to memory of 424	1708	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe	3e727dcf952f9d13355b9ffcf27883b32e79d91334a472c7e0caf6108b030b79.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads