djvu | 1a43d29d52aa8625e8e781d63ff2835ad46801fb30c329d2538a22fc027caa70

Analysis

max time kernel
146s
max time network
134s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
26-12-2024 23:40

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General

Target

2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe
Size

815KB
MD5

efe32de4c5ecc8d1e6a3a19f8a34f61c
SHA1

f28dad37fce7f28ded97e28b89cdf28d4313e47d
SHA256

2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44
SHA512

770cd0524121df290a199b7f44d4fcc82801cae7fa7ec644a10e3f9713122b71af4372b87b59f6dc8852439c70a2d075df2a9bc25185fefe334218d2157b9c88
SSDEEP

12288:MViuhuDax9n+FUgaqzDdNV96tqwLxeNFs9osoEITVB9E5oHA6vXASn8ZxcEwBc:ZD8sjxdN/6AwLomoVEyVEGHn3Ux

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://acacaca.org/test1/get.php

Attributes

extension
.vvew
offline_id
rE5LpDv2ftYRXAo7bC18EpzfRMTHSGjgfyIMfZt1
payload_url
http://rgyui.top/dl/build2.exe

http://acacaca.org/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. You can get and look video overview decrypt tool: https://we.tl/t-QsoSRIeAK6 Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. 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: 0530Jhyjd

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral1/memory/1628-2-0x00000000004E0000-0x00000000005FB000-memory.dmp	family_djvu
behavioral1/memory/2332-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2332-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2332-9-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2332-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-52-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-51-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-53-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-57-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-69-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-66-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-68-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-70-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Djvu family
djvu

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2568	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-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\937e581f-5635-4dea-a0f3-29fd3c19d1d1\\2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe\" --AutoStart"	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.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
9	api.2ip.ua
4	api.2ip.ua
5	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1628 set thread context of 2332	1628	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	31
PID 2880 set thread context of 2748	2880	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	35

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2332	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe
2332	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe
2748	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe
2748	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1628 wrote to memory of 2332	1628	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	31
PID 1628 wrote to memory of 2332	1628	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	31
PID 1628 wrote to memory of 2332	1628	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	31
PID 1628 wrote to memory of 2332	1628	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	31
PID 1628 wrote to memory of 2332	1628	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	31
PID 1628 wrote to memory of 2332	1628	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	31
PID 1628 wrote to memory of 2332	1628	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	31
PID 1628 wrote to memory of 2332	1628	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	31
PID 1628 wrote to memory of 2332	1628	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	31
PID 1628 wrote to memory of 2332	1628	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	31
PID 1628 wrote to memory of 2332	1628	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	31
PID 2332 wrote to memory of 2568	2332	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	33
PID 2332 wrote to memory of 2568	2332	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	33
PID 2332 wrote to memory of 2568	2332	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	33
PID 2332 wrote to memory of 2568	2332	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	33
PID 2332 wrote to memory of 2880	2332	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	34
PID 2332 wrote to memory of 2880	2332	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	34
PID 2332 wrote to memory of 2880	2332	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	34
PID 2332 wrote to memory of 2880	2332	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	34
PID 2880 wrote to memory of 2748	2880	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	35
PID 2880 wrote to memory of 2748	2880	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	35
PID 2880 wrote to memory of 2748	2880	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	35
PID 2880 wrote to memory of 2748	2880	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	35
PID 2880 wrote to memory of 2748	2880	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	35
PID 2880 wrote to memory of 2748	2880	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	35
PID 2880 wrote to memory of 2748	2880	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	35
PID 2880 wrote to memory of 2748	2880	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	35
PID 2880 wrote to memory of 2748	2880	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	35
PID 2880 wrote to memory of 2748	2880	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	35
PID 2880 wrote to memory of 2748	2880	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	35

C:\Users\Admin\AppData\Local\Temp\2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe
"C:\Users\Admin\AppData\Local\Temp\2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1628
- C:\Users\Admin\AppData\Local\Temp\2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe
  "C:\Users\Admin\AppData\Local\Temp\2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2332
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\937e581f-5635-4dea-a0f3-29fd3c19d1d1" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2568
- - C:\Users\Admin\AppData\Local\Temp\2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe
    "C:\Users\Admin\AppData\Local\Temp\2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2880
  - - C:\Users\Admin\AppData\Local\Temp\2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe
      "C:\Users\Admin\AppData\Local\Temp\2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:2748

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
1KB

MD5
67e486b2f148a3fca863728242b6273e

SHA1
452a84c183d7ea5b7c015b597e94af8eef66d44a

SHA256
facaf1c3a4bf232abce19a2d534e495b0d3adc7dbe3797d336249aa6f70adcfb

SHA512
d3a37da3bb10a9736dc03e8b2b49baceef5d73c026e2077b8ebc1b786f2c9b2f807e0aa13a5866cf3b3cafd2bc506242ef139c423eaffb050bbb87773e53881e

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8

Filesize
436B

MD5
971c514f84bba0785f80aa1c23edfd79

SHA1
732acea710a87530c6b08ecdf32a110d254a54c8

SHA256
f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895

SHA512
43dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
174B

MD5
d2a68f7363e54efdb0a85e821e181fd6

SHA1
461ed631bbdfe7ca7129e6cc7e6cb21e16c50a94

SHA256
0a7bef97192b41613ff2f9b069af3a9ce6f8c6835936526768d35c597d9219b5

SHA512
80822eb609bf273792fcf36fe79edcc77890a6690e5869e0da0f716c73f30e4c9f4c3f98f697efc8dc1a5654a9eb57130c58d2e49cdb074ec769d26c15509b1b

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8

Filesize
170B

MD5
1fef446d74b9a658dc05c801656abacf

SHA1
fb5889764830672b502ee948209b69ab041e65bd

SHA256
08df63002e22bf77b87c1da4a10f1c14d2fde7f261a0b929ab0686cde6a86b0d

SHA512
7b28daec00ebf84caf7812490cc16754423598786e83f57a96dd73f7a05a3155dbbbe7d2471ef6f241a3e84673398f5e91789e5b8ec4394ddef9ac9b8aeb77b8

Download Submit
C:\Users\Admin\AppData\Local\937e581f-5635-4dea-a0f3-29fd3c19d1d1\2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe

Filesize
815KB

MD5
efe32de4c5ecc8d1e6a3a19f8a34f61c

SHA1
f28dad37fce7f28ded97e28b89cdf28d4313e47d

SHA256
2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44

SHA512
770cd0524121df290a199b7f44d4fcc82801cae7fa7ec644a10e3f9713122b71af4372b87b59f6dc8852439c70a2d075df2a9bc25185fefe334218d2157b9c88

Download Submit
C:\Users\Admin\AppData\Local\Temp\CabF69E.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
memory/1628-1-0x0000000000220000-0x00000000002B2000-memory.dmp

Filesize
584KB

Download
memory/1628-2-0x00000000004E0000-0x00000000005FB000-memory.dmp

Filesize
1.1MB

Download
memory/1628-0-0x0000000000220000-0x00000000002B2000-memory.dmp

Filesize
584KB

Download
memory/1628-7-0x0000000000220000-0x00000000002B2000-memory.dmp

Filesize
584KB

Download
memory/2332-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2332-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2332-9-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2332-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2332-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2748-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2748-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2748-52-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2748-51-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2748-53-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2748-57-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2748-69-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2748-66-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2748-68-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2748-70-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2880-35-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/2880-30-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/2880-29-0x0000000000270000-0x0000000000302000-memory.dmp

Filesize
584KB

Download