djvu | 89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5

General

Target

89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
Size

715KB
MD5

3167f65968007ded44a47a93dcaff631
SHA1

d18462c38b5620c425cd9cc208d23eb1486efe2b
SHA256

89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5
SHA512

7175157dbc725621b4489d656f9149c00d52ffd3dec0f1b94129eec850d91b8bff2399fc32542748cb7daf0bc13047166f710179e71f5898189d977d471fc19e
SSDEEP

12288:dFBiMY4Adil+YTRwQ9MX86Djb5QMHYqlr49kQqDRqq+HHzqdHnI6ltH5t:dFBaddiMYTCZswb5QM4kk9ytn+H8HLp

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/1828-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2384-4-0x0000000004AE0000-0x0000000004BFB000-memory.dmp	family_djvu
behavioral2/memory/1828-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1828-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1828-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1828-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4412-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4412-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4412-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4412-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4412-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4412-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4412-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4412-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4412-37-0x0000000000400000-0x0000000000537000-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

3000 icacls.exe

pid	process
3000	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.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\\e193e38b-0cb2-4233-884f-df8260fe12be\\89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe\" --AutoStart"	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.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
7 api.2ip.ua

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

Suspicious use of SetThreadContext 2 IoCs

Processes:

89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe

description	pid	process	target process
PID 2384 set thread context of 1828	2384	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
PID 8 set thread context of 4412	8	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.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:

89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe

pid	process
1828	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
1828	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
4412	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
4412	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe

C:\Users\Admin\AppData\Local\Temp\89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
"C:\Users\Admin\AppData\Local\Temp\89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2384

C:\Users\Admin\AppData\Local\Temp\89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
"C:\Users\Admin\AppData\Local\Temp\89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe"
2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1828

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\e193e38b-0cb2-4233-884f-df8260fe12be" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:3000

C:\Users\Admin\AppData\Local\Temp\89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
"C:\Users\Admin\AppData\Local\Temp\89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:8

C:\Users\Admin\AppData\Local\Temp\89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
"C:\Users\Admin\AppData\Local\Temp\89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:4412

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
3bfb237d95f9c34465d50360f39b3ceb

SHA1
2cdee845ea6ebbd3cd0466b0eae4752842de86cc

SHA256
2ceaddb29268e6112e7aa95722894fb061238ad4e2b247ce23595609daa5eb8d

SHA512
da55bf0fd898acda5dfd2366a96d439807e502c763dca35c3a119c3ab45f6e3d821a1e3fd29858e333606ef0e822f3373b9cb8c41d95736131bb001ad5b6a16f

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
d39321094005d2831889f12af877c114

SHA1
07c14e5c0a6c2e5c1f378a48787da6a1b98b57ab

SHA256
0554015cbd616af2f9496284ecf30892ed293eef3c91b5640836129515288d46

SHA512
3dd97c4006e3368e42f4e65004fbc82c5cdbf4a75e303ac343bad7896841439eb32bb8f04ddb19d85cacdfc0a513fb66c514322c533c2da0b1475eac1fd5e37c

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

MD5
1b8f64db413484abaa74ad8b94f10d85

SHA1
eece9b4a02c35a54b4123ffb6111035bded450ef

SHA256
82b6699243afa47c3da580a3da8767aed38a8c1fba069d7a553e9883b657ffa8

SHA512
84890bc3699c4d138f5d338fcdb799ff44429e3d1070cdbb67d0e75b3bdfb300d33b2d0c5b46bc6d3dd6150ee23165f5ee1998c9629972fc70f4bafa86a32428

Download Submit
C:\Users\Admin\AppData\Local\e193e38b-0cb2-4233-884f-df8260fe12be\89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
Filesize
715KB

MD5
3167f65968007ded44a47a93dcaff631

SHA1
d18462c38b5620c425cd9cc208d23eb1486efe2b

SHA256
89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5

SHA512
7175157dbc725621b4489d656f9149c00d52ffd3dec0f1b94129eec850d91b8bff2399fc32542748cb7daf0bc13047166f710179e71f5898189d977d471fc19e

Download Submit
memory/1828-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1828-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1828-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1828-2-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1828-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2384-4-0x0000000004AE0000-0x0000000004BFB000-memory.dmp

Filesize
1.1MB

Download
memory/2384-1-0x0000000004A40000-0x0000000004ADC000-memory.dmp

Filesize
624KB

Download
memory/4412-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4412-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4412-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4412-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4412-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4412-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4412-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4412-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4412-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 2384 wrote to memory of 1828	2384	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
PID 2384 wrote to memory of 1828	2384	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
PID 2384 wrote to memory of 1828	2384	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
PID 2384 wrote to memory of 1828	2384	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
PID 2384 wrote to memory of 1828	2384	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
PID 2384 wrote to memory of 1828	2384	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
PID 2384 wrote to memory of 1828	2384	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
PID 2384 wrote to memory of 1828	2384	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
PID 2384 wrote to memory of 1828	2384	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
PID 2384 wrote to memory of 1828	2384	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
PID 1828 wrote to memory of 3000	1828	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	icacls.exe
PID 1828 wrote to memory of 3000	1828	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	icacls.exe
PID 1828 wrote to memory of 3000	1828	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	icacls.exe
PID 1828 wrote to memory of 8	1828	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
PID 1828 wrote to memory of 8	1828	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
PID 1828 wrote to memory of 8	1828	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
PID 8 wrote to memory of 4412	8	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
PID 8 wrote to memory of 4412	8	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
PID 8 wrote to memory of 4412	8	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
PID 8 wrote to memory of 4412	8	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
PID 8 wrote to memory of 4412	8	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
PID 8 wrote to memory of 4412	8	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
PID 8 wrote to memory of 4412	8	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
PID 8 wrote to memory of 4412	8	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
PID 8 wrote to memory of 4412	8	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe
PID 8 wrote to memory of 4412	8	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe	89afb54fc4d9a27c28ba687539e77c9950ab3b485bd25db536880d6830ec15d5.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads