djvu | b57ca5f02071e18577f753660484a394b4a63186576e0348e56f6d95b7b6f2d2

Analysis

max time kernel
150s
max time network
138s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
23/12/2024, 20:46

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General

Target

8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe
Size

820KB
MD5

c4967a7c3dbbd5ef935c0107222c8595
SHA1

c680d5bb7eef9d21d63f77728f8e164d486b6cb0
SHA256

8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d
SHA512

406af4dfab24c1f9c0725dab6b692c2600f0d2b75b1f5a219427495e0f8513d03af663ba468ce4cd96803face4692a8876eae331688cdd8d9bb5efcbfe796f04
SSDEEP

12288:Vb8IWTR2ndRD9wFYnPAdBcW/xnVr87w14XcFvjFFYqSYBMgmi:V9sAv2uIo2hVGG3FfYjY+gmi

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.aawt
offline_id
MyudhIExJux2oRQXw95TT1oAPu7mvqRMzxr1eet1
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-4Xcf4IX21n 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: 0562Jhyjd

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral1/memory/2372-2-0x0000000001E00000-0x0000000001F1B000-memory.dmp	family_djvu
behavioral1/memory/2748-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-9-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1508-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1508-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1508-51-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1508-52-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1508-53-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1508-57-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1508-66-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1508-68-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1508-69-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1508-70-0x0000000000400000-0x0000000000537000-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
2712	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-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\ff3ad8e3-d54c-40aa-aa96-f3a41667000f\\8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe\" --AutoStart"	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.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 2372 set thread context of 2748	2372	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	30
PID 2544 set thread context of 1508	2544	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	33

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	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2748	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe
2748	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe
1508	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe
1508	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2372 wrote to memory of 2748	2372	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	30
PID 2372 wrote to memory of 2748	2372	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	30
PID 2372 wrote to memory of 2748	2372	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	30
PID 2372 wrote to memory of 2748	2372	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	30
PID 2372 wrote to memory of 2748	2372	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	30
PID 2372 wrote to memory of 2748	2372	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	30
PID 2372 wrote to memory of 2748	2372	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	30
PID 2372 wrote to memory of 2748	2372	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	30
PID 2372 wrote to memory of 2748	2372	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	30
PID 2372 wrote to memory of 2748	2372	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	30
PID 2372 wrote to memory of 2748	2372	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	30
PID 2748 wrote to memory of 2712	2748	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	31
PID 2748 wrote to memory of 2712	2748	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	31
PID 2748 wrote to memory of 2712	2748	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	31
PID 2748 wrote to memory of 2712	2748	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	31
PID 2748 wrote to memory of 2544	2748	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	32
PID 2748 wrote to memory of 2544	2748	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	32
PID 2748 wrote to memory of 2544	2748	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	32
PID 2748 wrote to memory of 2544	2748	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	32
PID 2544 wrote to memory of 1508	2544	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	33
PID 2544 wrote to memory of 1508	2544	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	33
PID 2544 wrote to memory of 1508	2544	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	33
PID 2544 wrote to memory of 1508	2544	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	33
PID 2544 wrote to memory of 1508	2544	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	33
PID 2544 wrote to memory of 1508	2544	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	33
PID 2544 wrote to memory of 1508	2544	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	33
PID 2544 wrote to memory of 1508	2544	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	33
PID 2544 wrote to memory of 1508	2544	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	33
PID 2544 wrote to memory of 1508	2544	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	33
PID 2544 wrote to memory of 1508	2544	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	33

C:\Users\Admin\AppData\Local\Temp\8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe
"C:\Users\Admin\AppData\Local\Temp\8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2372
- C:\Users\Admin\AppData\Local\Temp\8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe
  "C:\Users\Admin\AppData\Local\Temp\8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2748
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\ff3ad8e3-d54c-40aa-aa96-f3a41667000f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2712
- - C:\Users\Admin\AppData\Local\Temp\8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe
    "C:\Users\Admin\AppData\Local\Temp\8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2544
  - - C:\Users\Admin\AppData\Local\Temp\8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe
      "C:\Users\Admin\AppData\Local\Temp\8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:1508

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
86f45d06de6a01e70a826be4116cd399

SHA1
b8b872a2080afedcefc8bcef350326ad10ff1c0f

SHA256
e80af6785e30aef3c7851e171de564a8ba1c18342745bb3987ba9e6a24bf7ad4

SHA512
48452fc251897e1f38879114c7b30a1539cf163c70f8c6356c7a5297596989d4fb40cc82cbd29c640df695130789c1e8bf5a8c1066126e03fd61577533107c53

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

Filesize
342B

MD5
f489354370614e23cad9bccf97d0e28c

SHA1
2e06392294a8f68bf2088248b72c3ef82aa7238d

SHA256
9627d1adf472450e716d832d4cea07cf369c3059b5280027ac25a3d8d83ee41a

SHA512
15bf0c36bd987279c509b285ef9d7a2f7d8e9a490b619067cae889dadccf119d44b31521b01f80aa3ed53889ad7412dd4d0fa8a0d58b9e8bc917bbb995568b90

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

Filesize
170B

MD5
901b2021e3da3ea3e3423eedd0ad0c84

SHA1
4a1136b7cea03c7a8199f1d1f5c631a3fe2fe93e

SHA256
60f977a9caecfb3abeb4c2641832f665f3c8f63e6e85473525356ce1f1e3429b

SHA512
1fba8d4fb0a7ee58784643602544d7509e6955232efe6a2500d3bee94d379a0be874a472236a8d0d6adb7fc7b01041319014978f4b24c94d4a8fe8e7a7412d2b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab7B96.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\ff3ad8e3-d54c-40aa-aa96-f3a41667000f\8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe

Filesize
820KB

MD5
c4967a7c3dbbd5ef935c0107222c8595

SHA1
c680d5bb7eef9d21d63f77728f8e164d486b6cb0

SHA256
8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d

SHA512
406af4dfab24c1f9c0725dab6b692c2600f0d2b75b1f5a219427495e0f8513d03af663ba468ce4cd96803face4692a8876eae331688cdd8d9bb5efcbfe796f04

Download Submit
memory/1508-51-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1508-53-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1508-70-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1508-69-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1508-68-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1508-66-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1508-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1508-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1508-57-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1508-52-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2372-7-0x0000000001C90000-0x0000000001D22000-memory.dmp

Filesize
584KB

Download
memory/2372-2-0x0000000001E00000-0x0000000001F1B000-memory.dmp

Filesize
1.1MB

Download
memory/2372-1-0x0000000001C90000-0x0000000001D22000-memory.dmp

Filesize
584KB

Download
memory/2372-0-0x0000000001C90000-0x0000000001D22000-memory.dmp

Filesize
584KB

Download
memory/2544-35-0x0000000000400000-0x00000000004D3000-memory.dmp

Filesize
844KB

Download
memory/2544-31-0x0000000000400000-0x00000000004D3000-memory.dmp

Filesize
844KB

Download
memory/2544-29-0x00000000004E0000-0x0000000000572000-memory.dmp

Filesize
584KB

Download
memory/2748-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2748-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2748-9-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2748-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2748-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download