djvu | 183bccb3fddc6fa1c81563e2bf5ca8a159e818c8898f7fcf37bc588e390ffff3

General

Target

20240907dfbbc65bcb993511ab6ff149568115b1stop.exe
Size

1.1MB
MD5

dfbbc65bcb993511ab6ff149568115b1
SHA1

01fbad69d9e6ca3434633ee6eb6caac5a7504df3
SHA256

183bccb3fddc6fa1c81563e2bf5ca8a159e818c8898f7fcf37bc588e390ffff3
SHA512

1297ccf770c8a979a95a17efadb4dfef7f1998208fbc0aec2a41bb34bfe4eba71e8f30b4782e9c0cb895b5a27f433027e6138b33e2ffb83034d71ea42a6909b0
SSDEEP

24576:ZBUIKn/vwOXGUXAjCymYZiVtElVIBT2roqnTSSxWeT/dRPOO8dWQHUq7:F0dwAYZt6C31WeTVRPOhd7Uq7

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://ex3mall.com/test1/get.php

Attributes

extension
.isal
offline_id
m3KmScxfDyEQzJYP8qjOSfP4FvpsOXlekGuMPzt1
payload_url
http://uaery.top/dl/build2.exe

http://ex3mall.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. You can get and look video overview decrypt tool: https://we.tl/t-oWam3yYrSr Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. 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: 0620JOsie

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 1 IoCs

resource	yara_rule
behavioral2/files/0x00070000000234d8-7.dat	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation	20240907dfbbc65bcb993511ab6ff149568115b1stop.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1940	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-1-5-21-1194130065-3471212556-1656947724-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\cda2dde2-ed7f-4bdc-ba04-80e6196c34a2\\20240907dfbbc65bcb993511ab6ff149568115b1stop.exe\" --AutoStart"	20240907dfbbc65bcb993511ab6ff149568115b1stop.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
3	api.2ip.ua
5	api.2ip.ua
15	api.2ip.ua

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	20240907dfbbc65bcb993511ab6ff149568115b1stop.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	20240907dfbbc65bcb993511ab6ff149568115b1stop.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1700	20240907dfbbc65bcb993511ab6ff149568115b1stop.exe
1700	20240907dfbbc65bcb993511ab6ff149568115b1stop.exe
412	20240907dfbbc65bcb993511ab6ff149568115b1stop.exe
412	20240907dfbbc65bcb993511ab6ff149568115b1stop.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1700 wrote to memory of 1940	1700	20240907dfbbc65bcb993511ab6ff149568115b1stop.exe	86
PID 1700 wrote to memory of 1940	1700	20240907dfbbc65bcb993511ab6ff149568115b1stop.exe	86
PID 1700 wrote to memory of 1940	1700	20240907dfbbc65bcb993511ab6ff149568115b1stop.exe	86
PID 1700 wrote to memory of 412	1700	20240907dfbbc65bcb993511ab6ff149568115b1stop.exe	87
PID 1700 wrote to memory of 412	1700	20240907dfbbc65bcb993511ab6ff149568115b1stop.exe	87
PID 1700 wrote to memory of 412	1700	20240907dfbbc65bcb993511ab6ff149568115b1stop.exe	87

C:\Users\Admin\AppData\Local\Temp\20240907dfbbc65bcb993511ab6ff149568115b1stop.exe
"C:\Users\Admin\AppData\Local\Temp\20240907dfbbc65bcb993511ab6ff149568115b1stop.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1700
- C:\Windows\SysWOW64\icacls.exe
  icacls "C:\Users\Admin\AppData\Local\cda2dde2-ed7f-4bdc-ba04-80e6196c34a2" /deny *S-1-1-0:(OI)(CI)(DE,DC)
  2⤵
  - Modifies file permissions
  - System Location Discovery: System Language Discovery
  PID:1940
- C:\Users\Admin\AppData\Local\Temp\20240907dfbbc65bcb993511ab6ff149568115b1stop.exe
  "C:\Users\Admin\AppData\Local\Temp\20240907dfbbc65bcb993511ab6ff149568115b1stop.exe" --Admin IsNotAutoStart IsNotTask
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:412

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
1KB

MD5
7fb5fa1534dcf77f2125b2403b30a0ee

SHA1
365d96812a69ac0a4611ea4b70a3f306576cc3ea

SHA256
33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f

SHA512
a9279fd60505a1bfeef6fb07834cad0fd5be02fd405573fc1a5f59b991e9f88f5e81c32fe910f69bdc6585e71f02559895149eaf49c25b8ff955459fd60c0d2e

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8

Filesize
436B

MD5
971c514f84bba0785f80aa1c23edfd79

SHA1
732acea710a87530c6b08ecdf32a110d254a54c8

SHA256
f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895

SHA512
43dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
174B

MD5
a8202a0cfad2bb82c07dda48ad5f7e30

SHA1
3d8418d036e95203f0cba05aa873fc467a7303c9

SHA256
0d0bf63761d53fe14ad3c863889d91c5dd3ac181d4a8a2ea69dc5758b0e0057f

SHA512
afa269c4ee7bf744e23eeb3b10ad98a2404fc0accd98806da797521ec8897d3e382e155e122dc0d6857e8467bd5dfa8050baf2b81118784839099739ea47652e

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8

Filesize
170B

MD5
7af23c3618bf76c093303ff2460587c7

SHA1
b9e7937119128b2ac3b9c9db097f75b1848bee49

SHA256
0c3a261d406eb7a2ff6b078a054812c2b14cf26d2687c5abea483408b29eee22

SHA512
53c1d1c93bba6d60116857ac9b95fed69cb3f18ebd23057c7836bb506c94f09bf42adbc65756c51979aa5983ce7f9b04bd3ff09afaf742059412d7ad5feb6a94

Download Submit
C:\Users\Admin\AppData\Local\cda2dde2-ed7f-4bdc-ba04-80e6196c34a2\20240907dfbbc65bcb993511ab6ff149568115b1stop.exe

Filesize
1.1MB

MD5
dfbbc65bcb993511ab6ff149568115b1

SHA1
01fbad69d9e6ca3434633ee6eb6caac5a7504df3

SHA256
183bccb3fddc6fa1c81563e2bf5ca8a159e818c8898f7fcf37bc588e390ffff3

SHA512
1297ccf770c8a979a95a17efadb4dfef7f1998208fbc0aec2a41bb34bfe4eba71e8f30b4782e9c0cb895b5a27f433027e6138b33e2ffb83034d71ea42a6909b0

Download Submit

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads