djvu | ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f

Analysis

max time kernel
148s
max time network
152s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
29/05/2024, 12:34

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General

Target
ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe
Size 791KB
Sample240529-prswaafc33
SHA256 ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f
MD5 e6a405fce67912c654c68f18a52c103e
SHA1 775e526800f5470f6a87628b805f5d4ae5ca029b
SHA512 89c569f81140c892e096f69e5d828b8be8f67b3d1227ad78f69543bb333e88688c7bcf7f2b55e57531fbf45e06b3e6c5575bdb4f7283b130080a76edce178fc1
SSDEEP 12288:AA+saEK8ganvxovaxubfTeEb8KvbpXQ0WShf4FCnqK2i:AA7bxnpovFWwxvFYShffq
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.vehu
offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
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/33b490a613f49fa190924f199d2c079e20240512191214/caaf73 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: 0872PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/3664-2-0x0000000003DE0000-0x0000000003EFB000-memory.dmp	family_djvu
behavioral2/memory/1400-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1400-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1400-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1400-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1400-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2260-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2260-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2260-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2260-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2260-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2260-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2260-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2260-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2260-37-0x0000000000400000-0x0000000000537000-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
2124	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-1-5-21-1230210488-3096403634-4129516247-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\93026816-2041-4c2c-9ff2-89234c981993\\ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe\" --AutoStart"	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.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 3664 set thread context of 1400	3664	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	76
PID 2440 set thread context of 2260	2440	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	81

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
1400	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe
1400	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe
2260	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe
2260	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3664 wrote to memory of 1400	3664	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	76
PID 3664 wrote to memory of 1400	3664	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	76
PID 3664 wrote to memory of 1400	3664	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	76
PID 3664 wrote to memory of 1400	3664	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	76
PID 3664 wrote to memory of 1400	3664	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	76
PID 3664 wrote to memory of 1400	3664	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	76
PID 3664 wrote to memory of 1400	3664	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	76
PID 3664 wrote to memory of 1400	3664	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	76
PID 3664 wrote to memory of 1400	3664	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	76
PID 3664 wrote to memory of 1400	3664	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	76
PID 1400 wrote to memory of 2124	1400	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	77
PID 1400 wrote to memory of 2124	1400	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	77
PID 1400 wrote to memory of 2124	1400	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	77
PID 1400 wrote to memory of 2440	1400	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	78
PID 1400 wrote to memory of 2440	1400	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	78
PID 1400 wrote to memory of 2440	1400	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	78
PID 2440 wrote to memory of 2260	2440	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	81
PID 2440 wrote to memory of 2260	2440	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	81
PID 2440 wrote to memory of 2260	2440	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	81
PID 2440 wrote to memory of 2260	2440	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	81
PID 2440 wrote to memory of 2260	2440	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	81
PID 2440 wrote to memory of 2260	2440	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	81
PID 2440 wrote to memory of 2260	2440	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	81
PID 2440 wrote to memory of 2260	2440	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	81
PID 2440 wrote to memory of 2260	2440	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	81
PID 2440 wrote to memory of 2260	2440	ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe	81

C:\Users\Admin\AppData\Local\Temp\ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe
"C:\Users\Admin\AppData\Local\Temp\ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3664
- C:\Users\Admin\AppData\Local\Temp\ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe
  "C:\Users\Admin\AppData\Local\Temp\ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1400
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\93026816-2041-4c2c-9ff2-89234c981993" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2124
- - C:\Users\Admin\AppData\Local\Temp\ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe
    "C:\Users\Admin\AppData\Local\Temp\ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2440
  - - C:\Users\Admin\AppData\Local\Temp\ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe
      "C:\Users\Admin\AppData\Local\Temp\ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2260

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 bfcb18fa2ee3598fdff75b1ecc932c926f011bff60edfa141c41976499c821c5
MD5 6c93f60553415802769aea371043b2a5
SHA1 77d4fae422f2f5af9d6fbcfacf877a5a35a85d1c
SHA512 ca99fb34beb68dd3e2169edc3c30f964702e209439b4f37b292d6f5e39e1361eeb3251201faf9aa4789db66c23e5d55043a4e9a37e2ea4f319d2cd2951ccd965
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 b9da8bc1da9bfbb8381bb15aeec766af6a07728ce59cf180adcdabea82bc5d66
MD5 5a04cb5604e9885343c4f68ad5fc18bf
SHA1 43eae0730564ebb6a9b9d2736d295d501ad45889
SHA512 6b01f2725636d6f26e64fe519515befb62e92a3954a67955e041d01766c2258827204b66340522fc2474eaac6d0a45c0dbda46207a266d14386478c3cae1f575
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 f7fe67cff63abb91d068cb062bdc1c992d52f2c965555bc37a01baf98211540d
MD5 7f6a8105ec646e83e32e9e228633cb5f
SHA1 add10d64804c6f8dfb10e61513d20b60b7bc8731
SHA512 e330cc483539104e3f582d431962ae25d337633cacd8261bf858238854f52711c8daf9289fbfb65975a2232b88265af1d4ff994c7beacea0301c19bfc2bf50f9
MD5 SHA1 SHA512

Submit Download

ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe

Path C:\Users\Admin\AppData\Local\93026816-2041-4c2c-9ff2-89234c981993\ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f.exe
Size 791KB
SHA256 ceb9ac19a86c0f61906580f1d73657dfd95a4b7e866a49d9b2521238f34b2c7f
MD5 e6a405fce67912c654c68f18a52c103e
SHA1 775e526800f5470f6a87628b805f5d4ae5ca029b
SHA512 89c569f81140c892e096f69e5d828b8be8f67b3d1227ad78f69543bb333e88688c7bcf7f2b55e57531fbf45e06b3e6c5575bdb4f7283b130080a76edce178fc1
SSDEEP 12288:AA+saEK8ganvxovaxubfTeEb8KvbpXQ0WShf4FCnqK2i:AA7bxnpovFWwxvFYShffq
MD5 SHA1 SHA512 SSDEEP

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memory/1400-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1400-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1400-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1400-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1400-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2260-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2260-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2260-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2260-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2260-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2260-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2260-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2260-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2260-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3664-2-0x0000000003DE0000-0x0000000003EFB000-memory.dmp

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memory/3664-1-0x0000000002170000-0x000000000220E000-memory.dmp

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