djvu | 6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b

Analysis

max time kernel
293s
max time network
152s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
07/05/2024, 23:05

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General

Target
6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe
Size 773KB
Sample240507-223vfsdb2x
SHA256 6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b
MD5 6d59b0fdf7f7b72f5e1d38276aea3afc
SHA1 202ec8a2c5523797c06f50562bfdcd5e7394aec5
SHA512 454943538f7d92a23e9a265e458b97ea277cae2590b0ecb7669eaee3e403c8734ff1c06cc286c89bc727548f5d2bb9ee2a107aedeedc6a741b4212a850469c8a
SSDEEP 12288:KlZlK/mrQmWIETVcCIrRWW6bDFpaFWP4qXDAEu0GXlDLA0EPBAk6MRtykGk:yyIETCVWWqRM7ukP9LLEPBGMRtyTk
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 13 IoCs

resource	yara_rule
behavioral1/memory/2256-2-0x0000000003400000-0x000000000351B000-memory.dmp	family_djvu
behavioral1/memory/2948-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2948-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2948-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2948-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2800-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2800-45-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2800-46-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2800-47-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2800-50-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2800-53-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2800-52-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2800-54-0x0000000000400000-0x0000000000537000-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
2660	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-1-5-21-481678230-3773327859-3495911762-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\43fd8ec7-9f7e-4be9-9e06-b18a4580aa73\\6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe\" --AutoStart"	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.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
3	api.2ip.ua
4	api.2ip.ua
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2256 set thread context of 2948	2256	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	28
PID 2120 set thread context of 2800	2120	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	31

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2948	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe
2800	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2256 wrote to memory of 2948	2256	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	28
PID 2256 wrote to memory of 2948	2256	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	28
PID 2256 wrote to memory of 2948	2256	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	28
PID 2256 wrote to memory of 2948	2256	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	28
PID 2256 wrote to memory of 2948	2256	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	28
PID 2256 wrote to memory of 2948	2256	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	28
PID 2256 wrote to memory of 2948	2256	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	28
PID 2256 wrote to memory of 2948	2256	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	28
PID 2256 wrote to memory of 2948	2256	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	28
PID 2256 wrote to memory of 2948	2256	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	28
PID 2256 wrote to memory of 2948	2256	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	28
PID 2948 wrote to memory of 2660	2948	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	29
PID 2948 wrote to memory of 2660	2948	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	29
PID 2948 wrote to memory of 2660	2948	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	29
PID 2948 wrote to memory of 2660	2948	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	29
PID 2948 wrote to memory of 2120	2948	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	30
PID 2948 wrote to memory of 2120	2948	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	30
PID 2948 wrote to memory of 2120	2948	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	30
PID 2948 wrote to memory of 2120	2948	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	30
PID 2120 wrote to memory of 2800	2120	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	31
PID 2120 wrote to memory of 2800	2120	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	31
PID 2120 wrote to memory of 2800	2120	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	31
PID 2120 wrote to memory of 2800	2120	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	31
PID 2120 wrote to memory of 2800	2120	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	31
PID 2120 wrote to memory of 2800	2120	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	31
PID 2120 wrote to memory of 2800	2120	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	31
PID 2120 wrote to memory of 2800	2120	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	31
PID 2120 wrote to memory of 2800	2120	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	31
PID 2120 wrote to memory of 2800	2120	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	31
PID 2120 wrote to memory of 2800	2120	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	31

C:\Users\Admin\AppData\Local\Temp\6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe
"C:\Users\Admin\AppData\Local\Temp\6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2256
- C:\Users\Admin\AppData\Local\Temp\6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe
  "C:\Users\Admin\AppData\Local\Temp\6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2948
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\43fd8ec7-9f7e-4be9-9e06-b18a4580aa73" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2660
- - C:\Users\Admin\AppData\Local\Temp\6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe
    "C:\Users\Admin\AppData\Local\Temp\6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2120
  - - C:\Users\Admin\AppData\Local\Temp\6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe
      "C:\Users\Admin\AppData\Local\Temp\6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2800

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

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

Submit Download

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 77d89fd63eaad1bda28743dccb10aadb87e2f7b9152de5dbd566337f3c831c2b
MD5 5b2a4c7cdf5b17d1dfeb9a0e00b220cc
SHA1 51dd10833e5f96ad9e0cca0393e2a87f5a9c2316
SHA512 5e61fa2df72c55fa4465eef4737d84356e744deb069433f7fa6427e0d4c85539be6fd4000005167b6422318dd1973eb4b2f720a7ebca200a46eb789797bbbf7b
MD5 SHA1 SHA512

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94308059B57B3142E455B38A6EB92015

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Size 344B
SHA256 3b74c2ad99716b021b312ca628620b235cb779277e2381c6450133fe610f10ea
MD5 5305126ec4e8aa97fc5539a1e7d182a6
SHA1 1a891bea7454b1e239d479f534576119d5e598fb
SHA512 bbf02c5fdb83178a745a3f168bd9240e3da3065aab905fcb4903d8855420ff196a701321b32fda0b5b6726cc486c65a885d97f7cfd3fcaadfefeea81addd744a
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 752c0899ce9cbe99c2aea1d4a5efb0e4e8682ef7afac76735c55fbddbbb0ec43
MD5 57a75682c458be50127cb7cf6cd3d429
SHA1 2f65382849149e4e5b65a9d3c45ef9168243ce1e
SHA512 1008170f0420003cd4f6ef4b0aed1de57a3451862c7aa0e8237e85550a37d41940eab91191eedc198a34d9d05006e485c518bbd4b03806fd6a3f8a18645ebbe3
MD5 SHA1 SHA512

Submit Download

6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe

Path C:\Users\Admin\AppData\Local\43fd8ec7-9f7e-4be9-9e06-b18a4580aa73\6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe
Size 773KB
SHA256 6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b
MD5 6d59b0fdf7f7b72f5e1d38276aea3afc
SHA1 202ec8a2c5523797c06f50562bfdcd5e7394aec5
SHA512 454943538f7d92a23e9a265e458b97ea277cae2590b0ecb7669eaee3e403c8734ff1c06cc286c89bc727548f5d2bb9ee2a107aedeedc6a741b4212a850469c8a
SSDEEP 12288:KlZlK/mrQmWIETVcCIrRWW6bDFpaFWP4qXDAEu0GXlDLA0EPBAk6MRtykGk:yyIETCVWWqRM7ukP9LLEPBGMRtyTk
MD5 SHA1 SHA512 SSDEEP

Submit Download

Cab256B.tmp

Path C:\Users\Admin\AppData\Local\Temp\Cab256B.tmp
Size 68KB
SHA256 1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184
MD5 29f65ba8e88c063813cc50a4ea544e93
SHA1 05a7040d5c127e68c25d81cc51271ffb8bef3568
SHA512 e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa
SSDEEP 1536:iMveRG6BWC7T2g1wGUa5QUoaIB9ttiFJG+AOQOXl0Usvwr:feRG6BX6gUaHo9tkBHiUewr
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2120-29-0x0000000000220000-0x00000000002B1000-memory.dmp

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memory/2256-2-0x0000000003400000-0x000000000351B000-memory.dmp

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memory/2256-1-0x0000000000310000-0x00000000003A1000-memory.dmp

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memory/2256-0-0x0000000000310000-0x00000000003A1000-memory.dmp

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memory/2800-46-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2800-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2800-45-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2800-47-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2800-50-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2800-53-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2800-52-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2800-54-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2948-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2948-8-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2948-7-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2948-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/2948-5-0x0000000000400000-0x0000000000537000-memory.dmp

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