djvu | a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a

Analysis

max time kernel
146s
max time network
135s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
07/05/2024, 19:54

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General

Target
a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe
Size 761KB
Sample240507-ymx4wafe39
SHA256 a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a
MD5 70c0f6a5b9098d14fe711128a767f4bd
SHA1 6bd2c00752f5d51eadd83860ed38ca12ad6ea567
SHA512 887c2f4c03c82f6071bb61d61f0463f5d7b3dddd53d77367aa49dfbd045ac44fa311923fcc1ae36f04f936010232032e904b608f201848ba93a59b35169b84a6
SSDEEP 12288:6HEEWlcsXwBbBOEhgVKS8cEVsa9m2HP37OocB5S5rhaGeAB9rL:6kEWlcsgeEhrLVsGP37OrATf
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.qepi
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: 0867PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/840-2-0x0000000004960000-0x0000000004A7B000-memory.dmp	family_djvu
behavioral2/memory/4968-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4968-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4968-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4968-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4968-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/924-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/924-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/924-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/924-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/924-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/924-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/924-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/924-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/924-37-0x0000000000400000-0x0000000000537000-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
4676	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-1-5-21-891789021-684472942-1795878712-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\8cd878d1-0629-4003-8189-8bfc62808f10\\a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe\" --AutoStart"	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.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
7	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 840 set thread context of 4968	840	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	81
PID 4956 set thread context of 924	4956	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	86

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
4968	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe
4968	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe
924	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe
924	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 840 wrote to memory of 4968	840	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	81
PID 840 wrote to memory of 4968	840	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	81
PID 840 wrote to memory of 4968	840	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	81
PID 840 wrote to memory of 4968	840	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	81
PID 840 wrote to memory of 4968	840	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	81
PID 840 wrote to memory of 4968	840	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	81
PID 840 wrote to memory of 4968	840	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	81
PID 840 wrote to memory of 4968	840	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	81
PID 840 wrote to memory of 4968	840	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	81
PID 840 wrote to memory of 4968	840	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	81
PID 4968 wrote to memory of 4676	4968	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	82
PID 4968 wrote to memory of 4676	4968	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	82
PID 4968 wrote to memory of 4676	4968	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	82
PID 4968 wrote to memory of 4956	4968	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	83
PID 4968 wrote to memory of 4956	4968	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	83
PID 4968 wrote to memory of 4956	4968	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	83
PID 4956 wrote to memory of 924	4956	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	86
PID 4956 wrote to memory of 924	4956	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	86
PID 4956 wrote to memory of 924	4956	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	86
PID 4956 wrote to memory of 924	4956	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	86
PID 4956 wrote to memory of 924	4956	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	86
PID 4956 wrote to memory of 924	4956	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	86
PID 4956 wrote to memory of 924	4956	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	86
PID 4956 wrote to memory of 924	4956	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	86
PID 4956 wrote to memory of 924	4956	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	86
PID 4956 wrote to memory of 924	4956	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	86

C:\Users\Admin\AppData\Local\Temp\a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe
"C:\Users\Admin\AppData\Local\Temp\a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:840
- C:\Users\Admin\AppData\Local\Temp\a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe
  "C:\Users\Admin\AppData\Local\Temp\a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4968
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\8cd878d1-0629-4003-8189-8bfc62808f10" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4676
- - C:\Users\Admin\AppData\Local\Temp\a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe
    "C:\Users\Admin\AppData\Local\Temp\a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4956
  - - C:\Users\Admin\AppData\Local\Temp\a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe
      "C:\Users\Admin\AppData\Local\Temp\a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:924

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

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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 c0bea69763c950bbff9cb4a80cdd9db6ae4d65ad2db89ccf6f90c062912e0336
MD5 c2fcdeb42513d34030e00df67fe6554d
SHA1 64298f1ed2f0c445336f223f2f0c04b15c3041ff
SHA512 9ca8983c457c9525188747ce088ba920447cbec0779e5424bcdd342ea7ce5208df429b9114d44c82132032de0bb493ed5cb2a57f109ef9b5e80a7bce4de02293
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 ed6b19ba8cb66031da2724bef71aa354f2e1729a69a123de2ea574315ff0fff0
MD5 bb8d45bff06fc797cc039a87f8ff3351
SHA1 17d07a309d2ffc3ce71c7e8c3930470ff2e909a5
SHA512 2b76e86ff9343c1cd5e2c42d9142ec98b3a6fd194b9fd70dc553d951dc73012812f5301182ba8507af38fb01d4f009a061c9e6e64086037e7fb4194578697810
MD5 SHA1 SHA512

Submit Download

a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe

Path C:\Users\Admin\AppData\Local\8cd878d1-0629-4003-8189-8bfc62808f10\a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe
Size 761KB
SHA256 a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a
MD5 70c0f6a5b9098d14fe711128a767f4bd
SHA1 6bd2c00752f5d51eadd83860ed38ca12ad6ea567
SHA512 887c2f4c03c82f6071bb61d61f0463f5d7b3dddd53d77367aa49dfbd045ac44fa311923fcc1ae36f04f936010232032e904b608f201848ba93a59b35169b84a6
SSDEEP 12288:6HEEWlcsXwBbBOEhgVKS8cEVsa9m2HP37OocB5S5rhaGeAB9rL:6kEWlcsgeEhrLVsGP37OrATf
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/840-2-0x0000000004960000-0x0000000004A7B000-memory.dmp

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memory/840-1-0x0000000002D60000-0x0000000002DFA000-memory.dmp

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memory/924-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/924-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/924-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/924-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/924-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/924-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/924-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/924-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/924-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4968-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4968-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4968-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4968-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4968-19-0x0000000000400000-0x0000000000537000-memory.dmp

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