djvu | 1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3

Analysis

max time kernel
294s
max time network
299s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
07/05/2024, 22:30

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General

Target
1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe
Size 807KB
Sample240507-2ezvaabe31
SHA256 1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3
MD5 723aa64d603ccfb48104924995501a2a
SHA1 f9ecef27ab4601756647985070d5546e04ec0761
SHA512 b1a0e4f526c0652307dfd645639e06b173ecc3c4131fbf1aa13a518ad232851d97febfacb0820abd4f5f97ebc3b4e1a37ec5525371ac83692c73c1b53330c457
SSDEEP 12288:oKzU2/9reIPrj1AUWEvVInb+ZS6krXoKWoBPRottaUtLtJxheBEUHlMEZDnnKikm:zFXJHe+46ixZP28UFtleBEUHfDKikm
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 14 IoCs

resource	yara_rule
behavioral2/memory/4512-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2304-5-0x00000000037E0000-0x00000000038FB000-memory.dmp	family_djvu
behavioral2/memory/4512-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4512-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4512-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4512-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2252-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2252-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2252-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2252-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2252-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2252-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2252-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2252-36-0x0000000000400000-0x0000000000537000-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
3688	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-1-5-21-3968772205-1713802336-1776639840-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\1eeac099-f9d5-43f1-9ad1-6f8d7d07ded8\\1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe\" --AutoStart"	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.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
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2304 set thread context of 4512	2304	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	74
PID 5052 set thread context of 2252	5052	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	78

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
4512	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe
4512	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe
2252	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe
2252	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2304 wrote to memory of 4512	2304	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	74
PID 2304 wrote to memory of 4512	2304	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	74
PID 2304 wrote to memory of 4512	2304	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	74
PID 2304 wrote to memory of 4512	2304	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	74
PID 2304 wrote to memory of 4512	2304	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	74
PID 2304 wrote to memory of 4512	2304	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	74
PID 2304 wrote to memory of 4512	2304	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	74
PID 2304 wrote to memory of 4512	2304	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	74
PID 2304 wrote to memory of 4512	2304	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	74
PID 2304 wrote to memory of 4512	2304	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	74
PID 4512 wrote to memory of 3688	4512	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	75
PID 4512 wrote to memory of 3688	4512	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	75
PID 4512 wrote to memory of 3688	4512	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	75
PID 4512 wrote to memory of 5052	4512	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	76
PID 4512 wrote to memory of 5052	4512	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	76
PID 4512 wrote to memory of 5052	4512	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	76
PID 5052 wrote to memory of 2252	5052	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	78
PID 5052 wrote to memory of 2252	5052	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	78
PID 5052 wrote to memory of 2252	5052	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	78
PID 5052 wrote to memory of 2252	5052	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	78
PID 5052 wrote to memory of 2252	5052	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	78
PID 5052 wrote to memory of 2252	5052	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	78
PID 5052 wrote to memory of 2252	5052	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	78
PID 5052 wrote to memory of 2252	5052	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	78
PID 5052 wrote to memory of 2252	5052	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	78
PID 5052 wrote to memory of 2252	5052	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	78

C:\Users\Admin\AppData\Local\Temp\1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe
"C:\Users\Admin\AppData\Local\Temp\1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2304
- C:\Users\Admin\AppData\Local\Temp\1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe
  "C:\Users\Admin\AppData\Local\Temp\1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4512
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\1eeac099-f9d5-43f1-9ad1-6f8d7d07ded8" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3688
- - C:\Users\Admin\AppData\Local\Temp\1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe
    "C:\Users\Admin\AppData\Local\Temp\1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:5052
  - - C:\Users\Admin\AppData\Local\Temp\1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe
      "C:\Users\Admin\AppData\Local\Temp\1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2252

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 26f7df2742be7eae0cecb3954ab69d2f1ad25c6b63a21e3a477ea34dee8301ae
MD5 af14424bd91fa356e225129fe451aacc
SHA1 4046dc95051bf8382196ff1fec36326c22dc1aae
SHA512 362068ce189ee00c318b574ebc8fc4f2e09add21f6c79aea8fe2f69ece44c0beaeb6c7fec7297a0b758ea5b8879ab0e9993c74ab262e200e289c05833e734179
MD5 SHA1 SHA512

Submit Download

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

Submit Download

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 d7673c25b921dd0159692c73c66d85ae7df119c8a7f9100fc0dd5aab91198677
MD5 a0db169c1813bf72e3cc7955ada9c0bb
SHA1 49289cd945ff03e5da394d953cd48cee7e3e880a
SHA512 2de8060801e47048a797960f828b74e09c8c765d4db46b2bab0931fe1ac7d816c1118e3b2bcf3881eac6769805b7618deb63f00a30b19a66d7caa8188a1ffb92
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 b878389a07d58b57f80c1421931ae9c85eb82b0b9cb2edbcab681fa05c04a45f
MD5 de441988ea09371cf9e3c9e905cd5100
SHA1 7d2425824d9b4b6879d47308baf1cc27d7d7e1e7
SHA512 0a2830dee98b5ffa64b3a431d3a3d7851131ff7fcf71f57e00ab83494172295e7c80ae7f08c08fc7513934773cd91c369944f89165ed24bf8ecbe520091ff880
MD5 SHA1 SHA512

Submit Download

1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe

Path C:\Users\Admin\AppData\Local\1eeac099-f9d5-43f1-9ad1-6f8d7d07ded8\1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe
Size 807KB
SHA256 1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3
MD5 723aa64d603ccfb48104924995501a2a
SHA1 f9ecef27ab4601756647985070d5546e04ec0761
SHA512 b1a0e4f526c0652307dfd645639e06b173ecc3c4131fbf1aa13a518ad232851d97febfacb0820abd4f5f97ebc3b4e1a37ec5525371ac83692c73c1b53330c457
SSDEEP 12288:oKzU2/9reIPrj1AUWEvVInb+ZS6krXoKWoBPRottaUtLtJxheBEUHlMEZDnnKikm:zFXJHe+46ixZP28UFtleBEUHfDKikm
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2252-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2252-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2252-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2252-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2252-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2252-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2252-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2252-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2304-1-0x0000000003740000-0x00000000037E0000-memory.dmp

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memory/2304-5-0x00000000037E0000-0x00000000038FB000-memory.dmp

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memory/4512-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4512-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4512-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4512-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4512-19-0x0000000000400000-0x0000000000537000-memory.dmp

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