djvu | 1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b

General

Target

1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe
Size

755KB
MD5

f94769ddbc0a28cb02f6158409ba1aa3
SHA1

496ade8f2e58f19b465c5a8acae71d3e75f9c57b
SHA256

1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b
SHA512

4a070abd3d7b3329fb495c49bf39e6bb2f64bf44ee8faf2d9fc7f461a938b0346d6ff84b15eebee160c2423f3199185bcfd11c938d024545cd783ca0edfe64e7
SSDEEP

12288:6Me6fKEJVlkJVNdRjzKlRMGwegtYZGscvzmgXaEZzAeT0LIUgq1gAWUFAUkl87NC:6+CMM1zHKGxeZGD6gvBAdLIu8UFAUkOk

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.looy
offline_id
1eSPzWRaNslCgtjBZfL5pzvovoiaVI4IZSnvAwt1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://sajdfue.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/3ed7a617738550b0a00c5aa231c0752020240316170955/d71ce1 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: 0858PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 8 IoCs

resource	yara_rule
behavioral1/memory/436-2-0x00000000023D0000-0x00000000024EB000-memory.dmp	family_djvu
behavioral1/memory/896-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/896-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/896-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/896-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/896-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/212-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/212-23-0x0000000000400000-0x0000000000537000-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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2736	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-1-5-21-1497073144-2389943819-3385106915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f50e85a0-ee3b-4dc4-adde-ef11165238a9\\1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe\" --AutoStart"	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe

Looks up external IP address via web service 2 IoCs

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

flow	ioc
3	api.2ip.ua
4	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 436 set thread context of 896	436	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	85
PID 4036 set thread context of 212	4036	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	89

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
896	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe
896	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 436 wrote to memory of 896	436	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	85
PID 436 wrote to memory of 896	436	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	85
PID 436 wrote to memory of 896	436	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	85
PID 436 wrote to memory of 896	436	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	85
PID 436 wrote to memory of 896	436	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	85
PID 436 wrote to memory of 896	436	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	85
PID 436 wrote to memory of 896	436	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	85
PID 436 wrote to memory of 896	436	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	85
PID 436 wrote to memory of 896	436	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	85
PID 436 wrote to memory of 896	436	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	85
PID 896 wrote to memory of 2736	896	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	86
PID 896 wrote to memory of 2736	896	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	86
PID 896 wrote to memory of 2736	896	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	86
PID 896 wrote to memory of 4036	896	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	87
PID 896 wrote to memory of 4036	896	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	87
PID 896 wrote to memory of 4036	896	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	87
PID 4036 wrote to memory of 212	4036	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	89
PID 4036 wrote to memory of 212	4036	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	89
PID 4036 wrote to memory of 212	4036	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	89
PID 4036 wrote to memory of 212	4036	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	89
PID 4036 wrote to memory of 212	4036	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	89
PID 4036 wrote to memory of 212	4036	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	89
PID 4036 wrote to memory of 212	4036	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	89
PID 4036 wrote to memory of 212	4036	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	89
PID 4036 wrote to memory of 212	4036	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	89
PID 4036 wrote to memory of 212	4036	1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe	89

C:\Users\Admin\AppData\Local\Temp\1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe
"C:\Users\Admin\AppData\Local\Temp\1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:436
- C:\Users\Admin\AppData\Local\Temp\1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe
  "C:\Users\Admin\AppData\Local\Temp\1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:896
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\f50e85a0-ee3b-4dc4-adde-ef11165238a9" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2736
- - C:\Users\Admin\AppData\Local\Temp\1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe
    "C:\Users\Admin\AppData\Local\Temp\1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4036
  - - C:\Users\Admin\AppData\Local\Temp\1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe
      "C:\Users\Admin\AppData\Local\Temp\1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:212

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

C:\Users\Admin\AppData\Local\f50e85a0-ee3b-4dc4-adde-ef11165238a9\1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b.exe

Filesize
755KB

MD5
f94769ddbc0a28cb02f6158409ba1aa3

SHA1
496ade8f2e58f19b465c5a8acae71d3e75f9c57b

SHA256
1b5b24e46c2720446917b8ee3bf31067c956eefa1cba31b571bba5fe96c0176b

SHA512
4a070abd3d7b3329fb495c49bf39e6bb2f64bf44ee8faf2d9fc7f461a938b0346d6ff84b15eebee160c2423f3199185bcfd11c938d024545cd783ca0edfe64e7

Download Submit
memory/212-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/212-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/436-1-0x0000000000870000-0x0000000000907000-memory.dmp

Filesize
604KB

Download
memory/436-2-0x00000000023D0000-0x00000000024EB000-memory.dmp

Filesize
1.1MB

Download
memory/896-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/896-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/896-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/896-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/896-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4036-20-0x0000000002170000-0x0000000002206000-memory.dmp

Filesize
600KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads