djvu | 3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11

General

Target
3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe
Size 742KB
Sample240427-s7xe7acf92
SHA256 3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11
MD5 51b68df562c85b71f43593a2356f48cc
SHA1 e28a8c17d55bb863692b3ce7e0447cb2fdca5331
SHA512 828a75f27f62d512ec67a6a9279c78f07656d77303f4346bc23332f4b79b0f2dc21991e49b8b959728892fe3534a8f91bea873585880c55fcdab42c1fce09dfc
SSDEEP 12288:KgXKO7eyPhFEXBVgRllwcH5431gItYJpe9x/4HsccRz:5XKO7LFO3gSgYNYHOxVL1
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.bgjs
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
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/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 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: 0863PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 6 IoCs

resource	yara_rule
behavioral2/memory/4248-2-0x0000000003140000-0x000000000325B000-memory.dmp	family_djvu
behavioral2/memory/1316-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1316-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1316-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1316-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1316-12-0x0000000000400000-0x0000000000537000-memory.dmp	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-1-5-21-17203666-93769886-2545153620-1000\Control Panel\International\Geo\Nation	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1572	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-1-5-21-17203666-93769886-2545153620-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\83afbda1-1f7b-4ee3-8c00-8eb048387fca\\3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe\" --AutoStart"	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
4	api.2ip.ua

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4248 set thread context of 1316	4248	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	86

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1316	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe
1316	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4248 wrote to memory of 1316	4248	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	86
PID 4248 wrote to memory of 1316	4248	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	86
PID 4248 wrote to memory of 1316	4248	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	86
PID 4248 wrote to memory of 1316	4248	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	86
PID 4248 wrote to memory of 1316	4248	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	86
PID 4248 wrote to memory of 1316	4248	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	86
PID 4248 wrote to memory of 1316	4248	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	86
PID 4248 wrote to memory of 1316	4248	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	86
PID 4248 wrote to memory of 1316	4248	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	86
PID 4248 wrote to memory of 1316	4248	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	86
PID 1316 wrote to memory of 1572	1316	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	88
PID 1316 wrote to memory of 1572	1316	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	88
PID 1316 wrote to memory of 1572	1316	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	88
PID 1316 wrote to memory of 5072	1316	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	89
PID 1316 wrote to memory of 5072	1316	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	89
PID 1316 wrote to memory of 5072	1316	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	89

C:\Users\Admin\AppData\Local\Temp\3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe
"C:\Users\Admin\AppData\Local\Temp\3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4248
- C:\Users\Admin\AppData\Local\Temp\3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe
  "C:\Users\Admin\AppData\Local\Temp\3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1316
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\83afbda1-1f7b-4ee3-8c00-8eb048387fca" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1572
- - C:\Users\Admin\AppData\Local\Temp\3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe
    "C:\Users\Admin\AppData\Local\Temp\3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    PID:5072

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe

Path C:\Users\Admin\AppData\Local\83afbda1-1f7b-4ee3-8c00-8eb048387fca\3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe
Size 742KB
SHA256 3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11
MD5 51b68df562c85b71f43593a2356f48cc
SHA1 e28a8c17d55bb863692b3ce7e0447cb2fdca5331
SHA512 828a75f27f62d512ec67a6a9279c78f07656d77303f4346bc23332f4b79b0f2dc21991e49b8b959728892fe3534a8f91bea873585880c55fcdab42c1fce09dfc
SSDEEP 12288:KgXKO7eyPhFEXBVgRllwcH5431gItYJpe9x/4HsccRz:5XKO7LFO3gSgYNYHOxVL1
MD5 SHA1 SHA512 SSDEEP

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memory/1316-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1316-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1316-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1316-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1316-12-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4248-1-0x00000000030A0000-0x000000000313D000-memory.dmp

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memory/4248-2-0x0000000003140000-0x000000000325B000-memory.dmp

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Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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