djvu | 53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94

Analysis

max time kernel
293s
max time network
246s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
09/05/2024, 22:56

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General

Target
53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe
Size 765KB
Sample240509-2w4jssbf4t
SHA256 53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94
MD5 2531638a30fdddc814506d0837313313
SHA1 474f871ff088c61d4157763144b04592dfff533d
SHA512 b877608d1c32fb580de2faa15fc33de74eead9da8cb202d7a2cd87c4962478efb216d9e51163b0e2919c968ede04e15abb5f200768b76bbb0996ecdbb4ec0c29
SSDEEP 12288:USaDWZ31Zk1XAeMQWYsX68cyXtTbXStoCBBL28M19lMHkHehJj2:UzW5121j9fs7cqTbX8B66HOeh5
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 14 IoCs

resource	yara_rule
behavioral2/memory/3652-2-0x00000000048D0000-0x00000000049EB000-memory.dmp	family_djvu
behavioral2/memory/4592-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4592-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4592-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4592-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4592-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2492-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2492-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2492-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2492-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2492-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2492-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2492-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2492-36-0x0000000000400000-0x0000000000537000-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
3504	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-1-5-21-1687926120-3022217735-1146543763-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\c5691c39-4b88-490a-a516-68cb3d009749\\53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe\" --AutoStart"	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.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 3652 set thread context of 4592	3652	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	73
PID 4912 set thread context of 2492	4912	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	77

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
4592	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe
4592	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe
2492	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe
2492	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3652 wrote to memory of 4592	3652	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	73
PID 3652 wrote to memory of 4592	3652	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	73
PID 3652 wrote to memory of 4592	3652	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	73
PID 3652 wrote to memory of 4592	3652	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	73
PID 3652 wrote to memory of 4592	3652	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	73
PID 3652 wrote to memory of 4592	3652	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	73
PID 3652 wrote to memory of 4592	3652	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	73
PID 3652 wrote to memory of 4592	3652	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	73
PID 3652 wrote to memory of 4592	3652	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	73
PID 3652 wrote to memory of 4592	3652	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	73
PID 4592 wrote to memory of 3504	4592	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	74
PID 4592 wrote to memory of 3504	4592	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	74
PID 4592 wrote to memory of 3504	4592	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	74
PID 4592 wrote to memory of 4912	4592	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	75
PID 4592 wrote to memory of 4912	4592	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	75
PID 4592 wrote to memory of 4912	4592	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	75
PID 4912 wrote to memory of 2492	4912	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	77
PID 4912 wrote to memory of 2492	4912	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	77
PID 4912 wrote to memory of 2492	4912	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	77
PID 4912 wrote to memory of 2492	4912	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	77
PID 4912 wrote to memory of 2492	4912	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	77
PID 4912 wrote to memory of 2492	4912	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	77
PID 4912 wrote to memory of 2492	4912	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	77
PID 4912 wrote to memory of 2492	4912	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	77
PID 4912 wrote to memory of 2492	4912	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	77
PID 4912 wrote to memory of 2492	4912	53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe	77

C:\Users\Admin\AppData\Local\Temp\53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe
"C:\Users\Admin\AppData\Local\Temp\53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3652
- C:\Users\Admin\AppData\Local\Temp\53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe
  "C:\Users\Admin\AppData\Local\Temp\53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4592
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\c5691c39-4b88-490a-a516-68cb3d009749" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3504
- - C:\Users\Admin\AppData\Local\Temp\53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe
    "C:\Users\Admin\AppData\Local\Temp\53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4912
  - - C:\Users\Admin\AppData\Local\Temp\53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe
      "C:\Users\Admin\AppData\Local\Temp\53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2492

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 b50c616b5c29bd9611ed360a238b6b6c421d0fe3b85df331e4951aefab526b2e
MD5 5857aff0ea0365561d0f06769a04101c
SHA1 0ac570f0ec93618c5849baf94c0a167e4a706a95
SHA512 1863b40407893a4a26beaa7ae4add199676c15b633d59afb4dfd2906328b29497fdddcb0ff01b9ba77ac59c5c55511fa669b0ffd6e02bcfa2d2cc53df62390be
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 c4fc800fe5abc18f1c187eb7164ba53a3f6bdf521ce70780947db452b30fab4a
MD5 e29cf62008b4a6202001e0ea3784aa10
SHA1 859d041788592729aca3dd92a6cec5f88c35155d
SHA512 dc0b73d02d0a3e343840c3ef31adde4c0b230c1141be978cd4329c01476b64c726b9b2599421f476938931c0e85cac153cc5118d38d665fce6daa56886cefc4d
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 a876931b51ef98d60d3d6bd900052e39708da360cb568c88ed5d720819bc881b
MD5 499ee5efc46a9d5636b4fe9d4b30d4ac
SHA1 e5629767c68573f4cf04ac00ef2f1efb34420bde
SHA512 6125b1a94f2ef2411c0b5ec045a03ca26e21d9d51566b4f991e8487a76363ea67bd62b8936eec89c0145655ed463ab7f0de8836506f195f23231d7194517a539
MD5 SHA1 SHA512

Submit Download

53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe

Path C:\Users\Admin\AppData\Local\c5691c39-4b88-490a-a516-68cb3d009749\53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94.exe
Size 765KB
SHA256 53dc043119c9a37def26ea07e0eb9e554837da0d9abe1b16605e43df211adb94
MD5 2531638a30fdddc814506d0837313313
SHA1 474f871ff088c61d4157763144b04592dfff533d
SHA512 b877608d1c32fb580de2faa15fc33de74eead9da8cb202d7a2cd87c4962478efb216d9e51163b0e2919c968ede04e15abb5f200768b76bbb0996ecdbb4ec0c29
SSDEEP 12288:USaDWZ31Zk1XAeMQWYsX68cyXtTbXStoCBBL28M19lMHkHehJj2:UzW5121j9fs7cqTbX8B66HOeh5
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2492-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2492-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2492-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2492-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2492-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2492-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2492-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2492-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3652-1-0x0000000002DB0000-0x0000000002E4F000-memory.dmp

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memory/3652-2-0x00000000048D0000-0x00000000049EB000-memory.dmp

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memory/4592-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4592-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4592-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4592-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4592-19-0x0000000000400000-0x0000000000537000-memory.dmp

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