djvu | 3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083

Analysis

max time kernel
146s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
18/05/2024, 15:27

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General

Target
3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe
Size 721KB
Sample240518-sv3rfaab97
SHA256 3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083
MD5 6ca21882e6a49d8f98f9c1860bbb111d
SHA1 66b963945e1625c6a2226fc016a7332161c72635
SHA512 2d84f7d6305f7d93a4f33f8b0859c0f529d504d0bb32d35a649e9d9e2b1039f93d4422c08518116df3ea59863bc788dc426236c9f848ad6098e858afe649ac43
SSDEEP 12288:rurhwZv1C8Db7vytQqhDoTfrw+P7Iu21zy8Ue2V1NhmcMn2UnGorBkdFzIlnywlq:rur+CWb7Zqinwy7Iu2101Nocw2UnBNkx
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://cajgtus.com/test1/get.php

Attributes

extension
.vepi
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: 0871PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/960-2-0x0000000004270000-0x000000000438B000-memory.dmp	family_djvu
behavioral2/memory/3180-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3180-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3180-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3180-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3180-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4748-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4748-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4748-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4748-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4748-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4748-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4748-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4748-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4748-37-0x0000000000400000-0x0000000000537000-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
1468	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-1-5-21-2457560273-69882387-977367775-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\37e3ae20-b67c-4383-9ab4-41e90ea07d59\\3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe\" --AutoStart"	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.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
5	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 960 set thread context of 3180	960	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	80
PID 2832 set thread context of 4748	2832	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	86

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
3180	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe
3180	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe
4748	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe
4748	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 960 wrote to memory of 3180	960	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	80
PID 960 wrote to memory of 3180	960	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	80
PID 960 wrote to memory of 3180	960	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	80
PID 960 wrote to memory of 3180	960	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	80
PID 960 wrote to memory of 3180	960	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	80
PID 960 wrote to memory of 3180	960	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	80
PID 960 wrote to memory of 3180	960	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	80
PID 960 wrote to memory of 3180	960	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	80
PID 960 wrote to memory of 3180	960	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	80
PID 960 wrote to memory of 3180	960	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	80
PID 3180 wrote to memory of 1468	3180	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	82
PID 3180 wrote to memory of 1468	3180	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	82
PID 3180 wrote to memory of 1468	3180	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	82
PID 3180 wrote to memory of 2832	3180	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	83
PID 3180 wrote to memory of 2832	3180	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	83
PID 3180 wrote to memory of 2832	3180	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	83
PID 2832 wrote to memory of 4748	2832	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	86
PID 2832 wrote to memory of 4748	2832	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	86
PID 2832 wrote to memory of 4748	2832	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	86
PID 2832 wrote to memory of 4748	2832	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	86
PID 2832 wrote to memory of 4748	2832	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	86
PID 2832 wrote to memory of 4748	2832	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	86
PID 2832 wrote to memory of 4748	2832	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	86
PID 2832 wrote to memory of 4748	2832	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	86
PID 2832 wrote to memory of 4748	2832	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	86
PID 2832 wrote to memory of 4748	2832	3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe	86

C:\Users\Admin\AppData\Local\Temp\3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe
"C:\Users\Admin\AppData\Local\Temp\3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:960
- C:\Users\Admin\AppData\Local\Temp\3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe
  "C:\Users\Admin\AppData\Local\Temp\3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3180
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\37e3ae20-b67c-4383-9ab4-41e90ea07d59" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1468
- - C:\Users\Admin\AppData\Local\Temp\3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe
    "C:\Users\Admin\AppData\Local\Temp\3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2832
  - - C:\Users\Admin\AppData\Local\Temp\3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe
      "C:\Users\Admin\AppData\Local\Temp\3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4748

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 a4b814a66a9da593fcbbdcdbcd0feb44a23e19970b70045c70f3aa8c094cd574
MD5 53bbe16978d780a454fd4733bae09809
SHA1 0b56e3534ad80f541d1a6b252a5ede30eec6f3da
SHA512 5edd384f29f01c3fa280b593a03bffd3d8548780cfa375e39cbb69d82c3037601161d2eb24c68ac19c87fb25cd7325239ab7ce3f30271f8a330f74e810cacafd
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 3f0452cac1bfa40a3658b043418fe87c4d999d420a3ce7460bbeb1ee7aa0b034
MD5 da18176965fcb90bb2c5a8a2eaab5f13
SHA1 8f196de77121479b414ac8c29a3fcf98279373f5
SHA512 a6a4d8c243c569f5520b404bab73c9165ed5d8aa46a9a08d53849699761a73a3e9d678661fa2fad4fa4f11ebad90e1821ef794cb037dffab6b1c34b1caa3207f
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 3ea80cf2ae03322f746c8cddf6a6cc2111cb038ffe50e44da18210f0b2e32d9f
MD5 5f8435712d3c3133a1a2b818a948082f
SHA1 7d88bed8d7b185e43037435c4f3577466c924af9
SHA512 ddb3ba3f9162ce1fdf5ee1e11f6478300608c0441ad5039202ae6ffb8d883cb5e0982525899f0dae0d60945a161427d1b7f5ed5fe4f25b6bdefcdc101954805f
MD5 SHA1 SHA512

Submit Download

3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe

Path C:\Users\Admin\AppData\Local\37e3ae20-b67c-4383-9ab4-41e90ea07d59\3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083.exe
Size 721KB
SHA256 3a04d61c25a804100b990c2993f6d534d2295d2bd3fdb12c1db031be6bfae083
MD5 6ca21882e6a49d8f98f9c1860bbb111d
SHA1 66b963945e1625c6a2226fc016a7332161c72635
SHA512 2d84f7d6305f7d93a4f33f8b0859c0f529d504d0bb32d35a649e9d9e2b1039f93d4422c08518116df3ea59863bc788dc426236c9f848ad6098e858afe649ac43
SSDEEP 12288:rurhwZv1C8Db7vytQqhDoTfrw+P7Iu21zy8Ue2V1NhmcMn2UnGorBkdFzIlnywlq:rur+CWb7Zqinwy7Iu2101Nocw2UnBNkx
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/960-1-0x00000000040E0000-0x0000000004179000-memory.dmp

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memory/960-2-0x0000000004270000-0x000000000438B000-memory.dmp

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memory/3180-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3180-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3180-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3180-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3180-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4748-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4748-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4748-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4748-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4748-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4748-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4748-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4748-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4748-37-0x0000000000400000-0x0000000000537000-memory.dmp

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