djvu | 64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380

Analysis

max time kernel
144s
max time network
125s
platform
windows11-21h2_x64
resource
win11-20240709-en
resource tags

arch:x64arch:x86image:win11-20240709-enlocale:en-usos:windows11-21h2-x64system
submitted
15/07/2024, 19:50

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General

Target
64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe
Size 749KB
Sample240715-ykdbpayfra
SHA256 64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380
MD5 ed6466980b57e9479e511308cc0558f8
SHA1 1d2c1f972c759d7e210995014142c552177e476a
SHA512 ae44ca614fa9cbf5628c0933926ebf85eae51819417665dfcddaca2c9d74ce67c67086c4f4d869006e78ed8341ca2b1628b0c1e8aa9e642ef47125ae612fa456
SSDEEP 12288:P7KcPCq8SmnpgOToGvk/9vUolYvQ332Ha6hyfwyu7iMqQLGlU6s6K9TcXPhy:TKtFxXT16cdY3mBh/pjqOq9xjy
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.qual
offline_id
KLbRmn6on3AXGFgDLGtd0IkHmV7uHw9VxlcxO5t1
payload_url
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. 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: 0876qual

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/3412-2-0x0000000004120000-0x000000000423B000-memory.dmp	family_djvu
behavioral2/memory/1876-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1876-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1876-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1876-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1876-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1660-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1660-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1660-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1660-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1660-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1660-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1660-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1660-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1660-38-0x0000000000400000-0x0000000000537000-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
2348	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-1-5-21-514081398-208714212-3319599467-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\c5c1c467-64ec-41ac-957b-e906f920b9ff\\64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe\" --AutoStart"	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.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
2	api.2ip.ua
6	api.2ip.ua
1	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3412 set thread context of 1876	3412	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	79
PID 2432 set thread context of 1660	2432	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	84

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
1876	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe
1876	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe
1660	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe
1660	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3412 wrote to memory of 1876	3412	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	79
PID 3412 wrote to memory of 1876	3412	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	79
PID 3412 wrote to memory of 1876	3412	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	79
PID 3412 wrote to memory of 1876	3412	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	79
PID 3412 wrote to memory of 1876	3412	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	79
PID 3412 wrote to memory of 1876	3412	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	79
PID 3412 wrote to memory of 1876	3412	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	79
PID 3412 wrote to memory of 1876	3412	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	79
PID 3412 wrote to memory of 1876	3412	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	79
PID 3412 wrote to memory of 1876	3412	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	79
PID 1876 wrote to memory of 2348	1876	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	80
PID 1876 wrote to memory of 2348	1876	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	80
PID 1876 wrote to memory of 2348	1876	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	80
PID 1876 wrote to memory of 2432	1876	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	81
PID 1876 wrote to memory of 2432	1876	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	81
PID 1876 wrote to memory of 2432	1876	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	81
PID 2432 wrote to memory of 1660	2432	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	84
PID 2432 wrote to memory of 1660	2432	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	84
PID 2432 wrote to memory of 1660	2432	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	84
PID 2432 wrote to memory of 1660	2432	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	84
PID 2432 wrote to memory of 1660	2432	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	84
PID 2432 wrote to memory of 1660	2432	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	84
PID 2432 wrote to memory of 1660	2432	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	84
PID 2432 wrote to memory of 1660	2432	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	84
PID 2432 wrote to memory of 1660	2432	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	84
PID 2432 wrote to memory of 1660	2432	64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe	84

C:\Users\Admin\AppData\Local\Temp\64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe
"C:\Users\Admin\AppData\Local\Temp\64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3412
- C:\Users\Admin\AppData\Local\Temp\64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe
  "C:\Users\Admin\AppData\Local\Temp\64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1876
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\c5c1c467-64ec-41ac-957b-e906f920b9ff" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2348
- - C:\Users\Admin\AppData\Local\Temp\64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe
    "C:\Users\Admin\AppData\Local\Temp\64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2432
  - - C:\Users\Admin\AppData\Local\Temp\64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe
      "C:\Users\Admin\AppData\Local\Temp\64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1660

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

8B2B9A00839EED1DFDCCC3BFC2F5DF12

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12
Size 1KB
SHA256 33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f
MD5 7fb5fa1534dcf77f2125b2403b30a0ee
SHA1 365d96812a69ac0a4611ea4b70a3f306576cc3ea
SHA512 a9279fd60505a1bfeef6fb07834cad0fd5be02fd405573fc1a5f59b991e9f88f5e81c32fe910f69bdc6585e71f02559895149eaf49c25b8ff955459fd60c0d2e
MD5 SHA1 SHA512

Submit Download

B46811C17859FFB409CF0E904A4AA8F8

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8
Size 436B
SHA256 5ba8817f13eee00e75158bad93076ab474a068c6b52686579e0f728fda68499f
MD5 1bfe0a81db078ea084ff82fe545176fe
SHA1 50b116f578bd272922fa8eae94f7b02fd3b88384
SHA512 37c582f3f09f8d80529608c09041295d1644bcc9de6fb8c4669b05339b0dd870f9525abc5eed53ad06a94b51441275504bc943c336c5beb63b53460ba836ca8d
MD5 SHA1 SHA512

Submit Download

8B2B9A00839EED1DFDCCC3BFC2F5DF12

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12
Size 174B
SHA256 2273e241a218268f477175c0e93cddd8fcfd60e2ed7950c8a6c2e111cec946f9
MD5 2fa0ba68ede3418890cc2efd382e4006
SHA1 a8cb8f25239f75569f39bb263a97edfb20895574
SHA512 306d26da9f7ff0bc131e52ec70ce8f839fa48601f2cd030a900af06221636a91ef1cee86548617ab836a7a833db35caf0d65509130a15f2a96ce5fbe34f3dbd3
MD5 SHA1 SHA512

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B46811C17859FFB409CF0E904A4AA8F8

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8
Size 170B
SHA256 d0f531c4c91f6ab3abee483609498c83ecde5fb8a949783e6264c117305ea9c1
MD5 64c1145d2061e05734261cffcad8e006
SHA1 8fbc1e22273cd37eeb6f1329c88a158d3260ecf7
SHA512 63f8fea2a3d2e35a2d01da7296add75c85fd04a0a42b6a1433fcf71a8d363e85d4ec24d4fd98e4568a57c10a70c011360cad37bcbf3b8d0920d4dbe52ea6d2c5
MD5 SHA1 SHA512

Submit Download

64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe

Path C:\Users\Admin\AppData\Local\c5c1c467-64ec-41ac-957b-e906f920b9ff\64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380.exe
Size 749KB
SHA256 64187c157d49176ec8e77ad1133d966ee05905c74ce55fac532c6a0061184380
MD5 ed6466980b57e9479e511308cc0558f8
SHA1 1d2c1f972c759d7e210995014142c552177e476a
SHA512 ae44ca614fa9cbf5628c0933926ebf85eae51819417665dfcddaca2c9d74ce67c67086c4f4d869006e78ed8341ca2b1628b0c1e8aa9e642ef47125ae612fa456
SSDEEP 12288:P7KcPCq8SmnpgOToGvk/9vUolYvQ332Ha6hyfwyu7iMqQLGlU6s6K9TcXPhy:TKtFxXT16cdY3mBh/pjqOq9xjy
MD5 SHA1 SHA512 SSDEEP

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memory/1660-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1660-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1660-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1660-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1660-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1660-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1660-33-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1660-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1660-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1876-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1876-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1876-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1876-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1876-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3412-2-0x0000000004120000-0x000000000423B000-memory.dmp

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memory/3412-1-0x0000000003F60000-0x0000000003FFD000-memory.dmp

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