djvu | 08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7

Analysis

max time kernel
141s
max time network
128s
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, 08:42

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General

Target
08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe
Size 756KB
Sample240505-kl5knsfg76
SHA256 08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7
MD5 ce978690b945c4a1f09fc3747b49d721
SHA1 4cb71bdf4059e8093c6c086b382a75e5bfe47580
SHA512 d8d2a4304c0ae1f80b88737ae72ea0bb0e27a4dfc5e483e4d2a2ab25bdadb81e8da4ed981be748eddc4cba5080316d1a22fbe4ad18d5f78973fb4cf5df734c1b
SSDEEP 12288:H3QEdfE4LjTFw5oeMMkU90tm33JIu2opVhPDtBkPoEAT3vuWEabdOkg27VW:H3TE4Lv6CJPm33dHVlUPoEq3DEabdOqk
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/2964-2-0x0000000004990000-0x0000000004AAB000-memory.dmp	family_djvu
behavioral2/memory/2600-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2600-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2600-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2600-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2600-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3412-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3412-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3412-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3412-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3412-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3412-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3412-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3412-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3412-37-0x0000000000400000-0x0000000000537000-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
4148	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\\9c50ee25-e647-44ba-be00-e1b9ddab24a5\\08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe\" --AutoStart"	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.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
8	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2964 set thread context of 2600	2964	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	80
PID 688 set thread context of 3412	688	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	85

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
2600	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe
2600	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe
3412	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe
3412	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2964 wrote to memory of 2600	2964	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	80
PID 2964 wrote to memory of 2600	2964	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	80
PID 2964 wrote to memory of 2600	2964	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	80
PID 2964 wrote to memory of 2600	2964	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	80
PID 2964 wrote to memory of 2600	2964	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	80
PID 2964 wrote to memory of 2600	2964	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	80
PID 2964 wrote to memory of 2600	2964	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	80
PID 2964 wrote to memory of 2600	2964	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	80
PID 2964 wrote to memory of 2600	2964	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	80
PID 2964 wrote to memory of 2600	2964	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	80
PID 2600 wrote to memory of 4148	2600	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	81
PID 2600 wrote to memory of 4148	2600	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	81
PID 2600 wrote to memory of 4148	2600	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	81
PID 2600 wrote to memory of 688	2600	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	82
PID 2600 wrote to memory of 688	2600	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	82
PID 2600 wrote to memory of 688	2600	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	82
PID 688 wrote to memory of 3412	688	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	85
PID 688 wrote to memory of 3412	688	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	85
PID 688 wrote to memory of 3412	688	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	85
PID 688 wrote to memory of 3412	688	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	85
PID 688 wrote to memory of 3412	688	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	85
PID 688 wrote to memory of 3412	688	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	85
PID 688 wrote to memory of 3412	688	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	85
PID 688 wrote to memory of 3412	688	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	85
PID 688 wrote to memory of 3412	688	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	85
PID 688 wrote to memory of 3412	688	08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe	85

C:\Users\Admin\AppData\Local\Temp\08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe
"C:\Users\Admin\AppData\Local\Temp\08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2964
- C:\Users\Admin\AppData\Local\Temp\08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe
  "C:\Users\Admin\AppData\Local\Temp\08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2600
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\9c50ee25-e647-44ba-be00-e1b9ddab24a5" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4148
- - C:\Users\Admin\AppData\Local\Temp\08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe
    "C:\Users\Admin\AppData\Local\Temp\08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:688
  - - C:\Users\Admin\AppData\Local\Temp\08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe
      "C:\Users\Admin\AppData\Local\Temp\08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:3412

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 78e9e16fa390f95ba4bdb34088d5c423a1b7133974b9541acd53dcf801e2a8ed
MD5 8a4c07b1b5345ffcec3114d76588f608
SHA1 cccf89e456e52e284e419b1573a7c4d5034358a8
SHA512 7e1996384b461d6924ef8693e7893bc2804f034a513cfa0aac324316cfb9a1435d44063751e18ea1b138fdbf48455d448229b02f5fb95c2ef0b5e8306bd194e6
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

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24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 eff65b6e2b0346e9887df4694bc26394a148ae128178a636d1be4bdcdd27da03
MD5 15fd29c7b7934f9aa916dcec92812c89
SHA1 eaf7a0a78c85b004190ce4df56fa734a584414ac
SHA512 27a65847e561ae6a617c325bf99c651e97568923bd133d18c9d58a5552d465096820a3810e14252b2b0c7d484f6b2e2bb73c4c8aaf7e288f4c911b0c7d491565
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 55828c1520d358022fe0070aa6fcb8585eb08e20c34212c266c7dc1a6c32798e
MD5 dea8872d1434a86bb4541a56f930300d
SHA1 372655610c34bb43a652a4df76a54937955009c5
SHA512 a1a6748abcf09260fccc0ad4db9036024dde514860261370e2686679bce0c7e5fb0a8b05899dd9186eee23450e9a1acc1301ef0f379f5e7872c1ead1b9ad71d3
MD5 SHA1 SHA512

Submit Download

08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe

Path C:\Users\Admin\AppData\Local\9c50ee25-e647-44ba-be00-e1b9ddab24a5\08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7.exe
Size 756KB
SHA256 08523e580d08e46851e3a7c9936d267d5615a84de01f11502ac97ac93e1dcdc7
MD5 ce978690b945c4a1f09fc3747b49d721
SHA1 4cb71bdf4059e8093c6c086b382a75e5bfe47580
SHA512 d8d2a4304c0ae1f80b88737ae72ea0bb0e27a4dfc5e483e4d2a2ab25bdadb81e8da4ed981be748eddc4cba5080316d1a22fbe4ad18d5f78973fb4cf5df734c1b
SSDEEP 12288:H3QEdfE4LjTFw5oeMMkU90tm33JIu2opVhPDtBkPoEAT3vuWEabdOkg27VW:H3TE4Lv6CJPm33dHVlUPoEq3DEabdOqk
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2600-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2600-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2600-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2600-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2600-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2964-2-0x0000000004990000-0x0000000004AAB000-memory.dmp

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memory/2964-1-0x0000000002FE0000-0x000000000307C000-memory.dmp

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memory/3412-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3412-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3412-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3412-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3412-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3412-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3412-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3412-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3412-37-0x0000000000400000-0x0000000000537000-memory.dmp

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