djvu | 72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c

Analysis

max time kernel
147s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
05/05/2024, 22:14

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General

Target
72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe
Size 774KB
Sample240505-15passfd41
SHA256 72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c
MD5 0a5c380b8d847daf23db07a7c10219fd
SHA1 23e8f21a652e4e8d7b81898103fc90a0715d6afd
SHA512 2fba0a5cc24350bc4fb6523381e7f582f22250d060e0a0b8aa3be4a32566c4e277a1be3a023e7455d636a6f48c22218ca0a50aad63c431d30cf6b9a9bf441088
SSDEEP 12288:CCKA4iLRoK3atpCYChzb3FQ5q91lQeJbhgqdL8H/2qB/XY3iSsHOF/:CTsLuuamZhzbEqXphgELKp3zHOF
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.qehu
offline_id
jgILOjDrBgyzY4JmT3B2jDSyBmDPBruKk8bKs6t1
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/665ddae3fc3cd10bbaaa4350408b196920240504141005/4cae7e 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: 0868PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/3132-2-0x0000000004950000-0x0000000004A6B000-memory.dmp	family_djvu
behavioral2/memory/4808-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4808-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4808-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4808-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4808-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/632-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/632-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/632-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/632-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/632-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/632-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/632-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/632-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/632-37-0x0000000000400000-0x0000000000537000-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

pid	Process
5036	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-1-5-21-2551177587-3778486488-1329702901-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\ba3b5a7e-d391-45c4-b3d6-9e4c314addf0\\72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe\" --AutoStart"	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.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
1	api.2ip.ua
2	api.2ip.ua
6	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3132 set thread context of 4808	3132	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	82
PID 4504 set thread context of 632	4504	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	87

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4808	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe
4808	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe
632	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe
632	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3132 wrote to memory of 4808	3132	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	82
PID 3132 wrote to memory of 4808	3132	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	82
PID 3132 wrote to memory of 4808	3132	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	82
PID 3132 wrote to memory of 4808	3132	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	82
PID 3132 wrote to memory of 4808	3132	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	82
PID 3132 wrote to memory of 4808	3132	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	82
PID 3132 wrote to memory of 4808	3132	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	82
PID 3132 wrote to memory of 4808	3132	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	82
PID 3132 wrote to memory of 4808	3132	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	82
PID 3132 wrote to memory of 4808	3132	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	82
PID 4808 wrote to memory of 5036	4808	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	83
PID 4808 wrote to memory of 5036	4808	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	83
PID 4808 wrote to memory of 5036	4808	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	83
PID 4808 wrote to memory of 4504	4808	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	84
PID 4808 wrote to memory of 4504	4808	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	84
PID 4808 wrote to memory of 4504	4808	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	84
PID 4504 wrote to memory of 632	4504	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	87
PID 4504 wrote to memory of 632	4504	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	87
PID 4504 wrote to memory of 632	4504	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	87
PID 4504 wrote to memory of 632	4504	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	87
PID 4504 wrote to memory of 632	4504	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	87
PID 4504 wrote to memory of 632	4504	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	87
PID 4504 wrote to memory of 632	4504	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	87
PID 4504 wrote to memory of 632	4504	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	87
PID 4504 wrote to memory of 632	4504	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	87
PID 4504 wrote to memory of 632	4504	72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe	87

C:\Users\Admin\AppData\Local\Temp\72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe
"C:\Users\Admin\AppData\Local\Temp\72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3132
- C:\Users\Admin\AppData\Local\Temp\72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe
  "C:\Users\Admin\AppData\Local\Temp\72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4808
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\ba3b5a7e-d391-45c4-b3d6-9e4c314addf0" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:5036
- - C:\Users\Admin\AppData\Local\Temp\72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe
    "C:\Users\Admin\AppData\Local\Temp\72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4504
  - - C:\Users\Admin\AppData\Local\Temp\72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe
      "C:\Users\Admin\AppData\Local\Temp\72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:632

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

File and Directory Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 1KB
SHA256 e8569d7b34f8be2c39d098acfc395bde7c314d0ad55b1efefca52ebb3fd3c06a
MD5 aba874fc4f2284853fb8b79aadaeb991
SHA1 e5eafdcc5da8536f1d3a6d138466bb026c0704ad
SHA512 c97cc627ea538fcea4dcb5aefc497adb24c919046d5b6393fdc5c747511d23893d53c612579fadfb8338d6754fa12ba247b1a44a86b0802d075fc6cf2ebf1553
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 724B
SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
MD5 8202a1cd02e7d69597995cabbe881a12
SHA1 8858d9d934b7aa9330ee73de6c476acf19929ff6
SHA512 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
MD5 SHA1 SHA512

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24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 5c7109d6ab82ea5dac4c16558e71264cbd1de427256521613e371becdca485fb
MD5 6d1c2d994f829735ad5f33b085cb0838
SHA1 212e66cabaf1b6d22b730df696906b3faf460f6a
SHA512 c5f671db64edfefd671427dd94e4402421282cf3d5187180824ff1e877ec75013e7247e3dfbcba65ef620f7db8753c69b8079dc4a62e172ce953301514e1156a
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 ee689531f73a07f55db1beaddf8df86ebe5b669e576a78bb00de9ec07874c370
MD5 47e21d7b9adb1586bdb8fa385e4fb102
SHA1 e0a668cfea38513fb94c5d8ed47e2698b84304d4
SHA512 a31cd6a8a5b2de987e7296b3eb0a1396b716f1a43c1a26a00c391ad0cb477553ffefed1e4352b66d394abc40c5089368f816954de0b2fa66dceb5c394c0e2590
MD5 SHA1 SHA512

Submit Download

72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe

Path C:\Users\Admin\AppData\Local\ba3b5a7e-d391-45c4-b3d6-9e4c314addf0\72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c.exe
Size 774KB
SHA256 72d406c5ce0e481e03b0ce675ddc28f8cf0db9758e4512c49ce4f904038eec7c
MD5 0a5c380b8d847daf23db07a7c10219fd
SHA1 23e8f21a652e4e8d7b81898103fc90a0715d6afd
SHA512 2fba0a5cc24350bc4fb6523381e7f582f22250d060e0a0b8aa3be4a32566c4e277a1be3a023e7455d636a6f48c22218ca0a50aad63c431d30cf6b9a9bf441088
SSDEEP 12288:CCKA4iLRoK3atpCYChzb3FQ5q91lQeJbhgqdL8H/2qB/XY3iSsHOF/:CTsLuuamZhzbEqXphgELKp3zHOF
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/632-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/632-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/632-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/632-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/632-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/632-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/632-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/632-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/632-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3132-1-0x0000000002F10000-0x0000000002FAA000-memory.dmp

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memory/3132-2-0x0000000004950000-0x0000000004A6B000-memory.dmp

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memory/4808-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4808-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4808-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4808-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4808-19-0x0000000000400000-0x0000000000537000-memory.dmp

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