djvu | 5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e

Analysis

max time kernel
292s
max time network
151s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
23/05/2024, 23:49

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General

Target

5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe
Size

707KB
MD5

49118adcd2d44037835ff7905ad888ba
SHA1

68f4743a19eb1bc61d33c3d388ab62d41e2515fd
SHA256

5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e
SHA512

b6ad39f966ea73d8aa690565af95953f74984ad168eca343dd061375f09c6d94a5b98cb16c931c40aa1b5e80e2f42c1b08fc35f87aa3af6fe86b7db1f5ddc388
SSDEEP

12288:XZ9k3MHqR6evJDgyB/rk2C0fRRYoFLHdLSuxDpXfYBBPz65M:XPk6qR6evJDP3B4oF53dgBk

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 13 IoCs

resource	yara_rule
behavioral1/memory/280-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2952-5-0x0000000003D20000-0x0000000003E3B000-memory.dmp	family_djvu
behavioral1/memory/280-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/280-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/280-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-44-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-45-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-46-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-50-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-53-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-52-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-54-0x0000000000400000-0x0000000000537000-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
3008	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-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e4ae4300-ffd7-4a1b-a352-6f12d8951ff0\\5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe\" --AutoStart"	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.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 2952 set thread context of 280	2952	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	28
PID 2572 set thread context of 2612	2572	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.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
280	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe
2612	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2952 wrote to memory of 280	2952	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	28
PID 2952 wrote to memory of 280	2952	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	28
PID 2952 wrote to memory of 280	2952	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	28
PID 2952 wrote to memory of 280	2952	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	28
PID 2952 wrote to memory of 280	2952	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	28
PID 2952 wrote to memory of 280	2952	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	28
PID 2952 wrote to memory of 280	2952	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	28
PID 2952 wrote to memory of 280	2952	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	28
PID 2952 wrote to memory of 280	2952	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	28
PID 2952 wrote to memory of 280	2952	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	28
PID 2952 wrote to memory of 280	2952	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	28
PID 280 wrote to memory of 3008	280	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	29
PID 280 wrote to memory of 3008	280	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	29
PID 280 wrote to memory of 3008	280	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	29
PID 280 wrote to memory of 3008	280	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	29
PID 280 wrote to memory of 2572	280	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	30
PID 280 wrote to memory of 2572	280	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	30
PID 280 wrote to memory of 2572	280	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	30
PID 280 wrote to memory of 2572	280	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	30
PID 2572 wrote to memory of 2612	2572	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	31
PID 2572 wrote to memory of 2612	2572	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	31
PID 2572 wrote to memory of 2612	2572	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	31
PID 2572 wrote to memory of 2612	2572	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	31
PID 2572 wrote to memory of 2612	2572	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	31
PID 2572 wrote to memory of 2612	2572	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	31
PID 2572 wrote to memory of 2612	2572	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	31
PID 2572 wrote to memory of 2612	2572	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	31
PID 2572 wrote to memory of 2612	2572	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	31
PID 2572 wrote to memory of 2612	2572	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	31
PID 2572 wrote to memory of 2612	2572	5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe	31

C:\Users\Admin\AppData\Local\Temp\5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe
"C:\Users\Admin\AppData\Local\Temp\5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2952
- C:\Users\Admin\AppData\Local\Temp\5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe
  "C:\Users\Admin\AppData\Local\Temp\5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:280
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\e4ae4300-ffd7-4a1b-a352-6f12d8951ff0" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3008
- - C:\Users\Admin\AppData\Local\Temp\5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe
    "C:\Users\Admin\AppData\Local\Temp\5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2572
  - - C:\Users\Admin\AppData\Local\Temp\5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe
      "C:\Users\Admin\AppData\Local\Temp\5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2612

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
6e66bd2d283b36991f7460262e5ff4ae

SHA1
eb6906c6d9350ef0b8ff2edd81c3e51649b4a916

SHA256
564b4fa6970bf22294bceca2fb8f53087f3f5dec9565872d731cedd80aa9e7c3

SHA512
974fef50144e97b5bbae326f07ec863082693396e85dd42a0f85c86b6a3d0928b2da485cb7b3e541942d3c9bf49ce2f8063acf0ced79d6ed755928fdba453727

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
2cde411007325f9a47478a9044b26bbd

SHA1
e3b6bf4f56680e6c335d866aa52baa947141513f

SHA256
041fc3e3cb5da27b2b769af769a8272a1b05a4bf03279456276caf4bc6ab7952

SHA512
e8b458f08b3c0788926c198ba6cef72440cda3bdd51cabdf4f57545ea2b624000dae168f41fdd8c370904e0e701e3af3e09bdb28bed124cff7eab40b004e9347

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

Filesize
344B

MD5
2e5d81e60b4dbb08bf22f1798559239c

SHA1
c57a7e280ea3b015a40a937310547c1ed717f736

SHA256
06426d5e02a9856dac1deff78ea416d03293edbf24608d7d45d616fdf37e8fa8

SHA512
98bb2a3f404b7f21b1fcfa1d3a380e963bf4b0498e17021c5b2d32b33e00831583e40168e50c66f09502112bc5a2f9b9a9ad23f10192f35eee315f83e58cac40

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

Filesize
392B

MD5
3d778dd13d77dd0518787307e8665a6b

SHA1
18c5f3f047bbd2b977a1f6c8cf5f9ecde4c35468

SHA256
58a4cec80469c6ed7b81095b2448fc5b74b83f22394a42626a3c2fa9b29112d7

SHA512
1a8f2c30b78d559b628fb420df18f1bbecf9ffc492ec304462e59ff9b9a0f0ec17b2fedd0f751aa0ceac8b637c9adb0f19686710f509b3a0afb2eef461ea4b8a

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab13EE.tmp

Filesize
65KB

MD5
ac05d27423a85adc1622c714f2cb6184

SHA1
b0fe2b1abddb97837ea0195be70ab2ff14d43198

SHA256
c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

SHA512
6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

Download Submit
C:\Users\Admin\AppData\Local\e4ae4300-ffd7-4a1b-a352-6f12d8951ff0\5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e.exe

Filesize
707KB

MD5
49118adcd2d44037835ff7905ad888ba

SHA1
68f4743a19eb1bc61d33c3d388ab62d41e2515fd

SHA256
5b860660dff386165f491d2952ea47fcc819093b64a77b5d683b1886e7478d3e

SHA512
b6ad39f966ea73d8aa690565af95953f74984ad168eca343dd061375f09c6d94a5b98cb16c931c40aa1b5e80e2f42c1b08fc35f87aa3af6fe86b7db1f5ddc388

Download Submit
memory/280-1-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/280-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/280-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/280-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/280-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2572-28-0x0000000000350000-0x00000000003E1000-memory.dmp

Filesize
580KB

Download
memory/2612-44-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2612-45-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2612-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2612-46-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2612-50-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2612-53-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2612-52-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2612-54-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2952-5-0x0000000003D20000-0x0000000003E3B000-memory.dmp

Filesize
1.1MB

Download
memory/2952-0-0x0000000003C80000-0x0000000003D11000-memory.dmp

Filesize
580KB

Download
memory/2952-49-0x0000000000400000-0x00000000023CC000-memory.dmp

Filesize
31.8MB

Download