djvu | 2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12

Analysis

max time kernel
293s
max time network
152s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
08/05/2024, 22:44

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General

Target

2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe
Size

730KB
MD5

9ba94ba3651f466b6819b6e36bd5ef08
SHA1

ebd7d5ccb991280241eb27b2e4a3a84f0a1a22cb
SHA256

2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12
SHA512

96557623c8d696187902155994fe12747ff8be160e2814ef12c5b28ac3ceaf0c074d70809d7aa0846702b11660a3b66e538f7533ea1d60d248e7ff2877c09981
SSDEEP

12288:Aa4NU9+jvuJ+B2adzl/GSiCrZ87cy2mIqkr7qBhaDlAealsv4x/FQihH+jWrJ:AXCo2an/htyt11faG8ici

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
behavioral1/memory/2244-2-0x0000000001C40000-0x0000000001D5B000-memory.dmp	family_djvu
behavioral1/memory/1948-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1948-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1948-9-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1948-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2716-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2716-46-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2716-47-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2716-48-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2716-50-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2716-53-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2716-52-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2716-54-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2716-55-0x0000000000400000-0x0000000000537000-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
1300	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-1-5-21-2737914667-933161113-3798636211-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\919f7536-9b6a-48f9-9b2c-d8119046e3c8\\2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe\" --AutoStart"	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.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 2244 set thread context of 1948	2244	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	28
PID 2224 set thread context of 2716	2224	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.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
1948	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe
2716	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2244 wrote to memory of 1948	2244	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	28
PID 2244 wrote to memory of 1948	2244	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	28
PID 2244 wrote to memory of 1948	2244	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	28
PID 2244 wrote to memory of 1948	2244	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	28
PID 2244 wrote to memory of 1948	2244	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	28
PID 2244 wrote to memory of 1948	2244	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	28
PID 2244 wrote to memory of 1948	2244	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	28
PID 2244 wrote to memory of 1948	2244	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	28
PID 2244 wrote to memory of 1948	2244	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	28
PID 2244 wrote to memory of 1948	2244	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	28
PID 2244 wrote to memory of 1948	2244	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	28
PID 1948 wrote to memory of 1300	1948	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	29
PID 1948 wrote to memory of 1300	1948	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	29
PID 1948 wrote to memory of 1300	1948	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	29
PID 1948 wrote to memory of 1300	1948	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	29
PID 1948 wrote to memory of 2224	1948	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	30
PID 1948 wrote to memory of 2224	1948	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	30
PID 1948 wrote to memory of 2224	1948	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	30
PID 1948 wrote to memory of 2224	1948	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	30
PID 2224 wrote to memory of 2716	2224	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	31
PID 2224 wrote to memory of 2716	2224	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	31
PID 2224 wrote to memory of 2716	2224	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	31
PID 2224 wrote to memory of 2716	2224	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	31
PID 2224 wrote to memory of 2716	2224	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	31
PID 2224 wrote to memory of 2716	2224	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	31
PID 2224 wrote to memory of 2716	2224	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	31
PID 2224 wrote to memory of 2716	2224	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	31
PID 2224 wrote to memory of 2716	2224	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	31
PID 2224 wrote to memory of 2716	2224	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	31
PID 2224 wrote to memory of 2716	2224	2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe	31

C:\Users\Admin\AppData\Local\Temp\2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe
"C:\Users\Admin\AppData\Local\Temp\2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2244
- C:\Users\Admin\AppData\Local\Temp\2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe
  "C:\Users\Admin\AppData\Local\Temp\2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1948
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\919f7536-9b6a-48f9-9b2c-d8119046e3c8" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1300
- - C:\Users\Admin\AppData\Local\Temp\2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe
    "C:\Users\Admin\AppData\Local\Temp\2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2224
  - - C:\Users\Admin\AppData\Local\Temp\2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe
      "C:\Users\Admin\AppData\Local\Temp\2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2716

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

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
1KB

MD5
098e3fff2705346ece787c21ac03d0f3

SHA1
8f6923a4871978ebb148a5f1cd34530887b0f0e7

SHA256
16ed7a2c43f928bcc7ec8f7e93082abda7106a63b87e747dcca57f1cee05ccc9

SHA512
2977d9e735e742cdef931554063ce606e3ea9ef4bbf5f405bda639cca10444d0882bc5f48067e5b0e847af7ba069a2fbd97f386937fd3b19b5444d208d962e7e

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
724B

MD5
8202a1cd02e7d69597995cabbe881a12

SHA1
8858d9d934b7aa9330ee73de6c476acf19929ff6

SHA256
58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

SHA512
97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
410B

MD5
a8e20c227bed2ce53482fd54ff9e0d40

SHA1
c0959ecb5b8c458c33893d8a571922068d6003ac

SHA256
34d87316e9912e6f1a00d38d1bd174038c873e75d336e921d39c7ec745e4b08d

SHA512
6276b6ed9b065f3c980f74682369a0f812334bc22fd4bfe76e168bd5de56825ace408280bc028f5d1fdbcf5fefc62e1079eb729bb8aaec81e73713bb208ad949

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

Filesize
344B

MD5
fffe6eef2f5197a1e519c8c81722ac2d

SHA1
0795846a798f6a0eb1b12792f8255c1d0d68ad8d

SHA256
90e26b04a72ff8c21113154ba70d0ffb466d0409a868b4c7f8a1f6e49e11c024

SHA512
c4e96cdf1a0c48824faac991624e0b93dd5986c3579d443894f54bea33622a036fa514f8e5766188e3c079e7eada6fc9ecca12731571f7db12923c83e9c9c926

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
392B

MD5
d324dfb8e9c5c6c89bf04cb31a3455ce

SHA1
27371907c59ad314a4c8ba7dad6ca601e7d6c12f

SHA256
071298448bb2017c119cc15f8fe72058d704f7de3ee00aac4db53e2c0d12a4b1

SHA512
05e5456289b7f6e38edde7b87bf0b6e4e8c3e1975014ce1c4661d0e8a23ab3277653efce8fb8778766a3420b317ad765d602f2e3b981e929f70fcf259b483eb2

Download Submit
C:\Users\Admin\AppData\Local\919f7536-9b6a-48f9-9b2c-d8119046e3c8\2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12.exe

Filesize
730KB

MD5
9ba94ba3651f466b6819b6e36bd5ef08

SHA1
ebd7d5ccb991280241eb27b2e4a3a84f0a1a22cb

SHA256
2ac8491eca16795aef58b5eed0bcab48b6555a2a31a627e6ec0a2b1a7b390a12

SHA512
96557623c8d696187902155994fe12747ff8be160e2814ef12c5b28ac3ceaf0c074d70809d7aa0846702b11660a3b66e538f7533ea1d60d248e7ff2877c09981

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab2684.tmp

Filesize
68KB

MD5
29f65ba8e88c063813cc50a4ea544e93

SHA1
05a7040d5c127e68c25d81cc51271ffb8bef3568

SHA256
1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

SHA512
e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

Download Submit
memory/1948-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1948-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1948-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1948-9-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1948-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2224-30-0x0000000000310000-0x00000000003A2000-memory.dmp

Filesize
584KB

Download
memory/2244-2-0x0000000001C40000-0x0000000001D5B000-memory.dmp

Filesize
1.1MB

Download
memory/2244-6-0x00000000002E0000-0x0000000000372000-memory.dmp

Filesize
584KB

Download
memory/2244-0-0x00000000002E0000-0x0000000000372000-memory.dmp

Filesize
584KB

Download
memory/2244-1-0x00000000002E0000-0x0000000000372000-memory.dmp

Filesize
584KB

Download
memory/2716-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2716-46-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2716-47-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2716-48-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2716-50-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2716-53-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2716-52-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2716-54-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2716-55-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download