djvu | 851fc4f6765ad4015d96a5952098b255c720ec8d88a974d6dfc498bec91910f3

General

Target

55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe
Size

814KB
MD5

960c9dad66df9d52c73f149540b6f7b3
SHA1

11920d07db2635587e2bb198d7c209d2e1be65ad
SHA256

55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68
SHA512

f1a64cf32418b1c932a0dc93521895eed60a87abdebba5f0c3bac4e3345655285038077e15f44014b6e840a07e5d9d1e944ed422148b62bc5059cf70537d0a14
SSDEEP

24576:2sX+/5uah35/BV2fHEPPtgjS0f6cCWdcPub:2JwHgCjS0FCY

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://acacaca.org/fhsgtsspen6/get.php

Attributes

extension
.vveo
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: 0533Jhyjd

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 18 IoCs

resource	yara_rule
behavioral2/memory/4552-2-0x0000000002320000-0x000000000243B000-memory.dmp	family_djvu
behavioral2/memory/968-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/968-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/968-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/968-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/968-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1748-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1748-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1748-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1748-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1748-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1748-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1748-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1748-44-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1748-47-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1748-46-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1748-48-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1748-49-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4924	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-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\cd1d2282-9b6f-44ed-af7b-a368b7a8aa13\\55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe\" --AutoStart"	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.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
11	api.2ip.ua
12	api.2ip.ua
19	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4552 set thread context of 968	4552	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	83
PID 2076 set thread context of 1748	2076	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	88

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	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
968	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe
968	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe
1748	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe
1748	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4552 wrote to memory of 968	4552	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	83
PID 4552 wrote to memory of 968	4552	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	83
PID 4552 wrote to memory of 968	4552	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	83
PID 4552 wrote to memory of 968	4552	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	83
PID 4552 wrote to memory of 968	4552	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	83
PID 4552 wrote to memory of 968	4552	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	83
PID 4552 wrote to memory of 968	4552	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	83
PID 4552 wrote to memory of 968	4552	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	83
PID 4552 wrote to memory of 968	4552	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	83
PID 4552 wrote to memory of 968	4552	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	83
PID 968 wrote to memory of 4924	968	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	84
PID 968 wrote to memory of 4924	968	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	84
PID 968 wrote to memory of 4924	968	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	84
PID 968 wrote to memory of 2076	968	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	85
PID 968 wrote to memory of 2076	968	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	85
PID 968 wrote to memory of 2076	968	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	85
PID 2076 wrote to memory of 1748	2076	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	88
PID 2076 wrote to memory of 1748	2076	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	88
PID 2076 wrote to memory of 1748	2076	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	88
PID 2076 wrote to memory of 1748	2076	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	88
PID 2076 wrote to memory of 1748	2076	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	88
PID 2076 wrote to memory of 1748	2076	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	88
PID 2076 wrote to memory of 1748	2076	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	88
PID 2076 wrote to memory of 1748	2076	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	88
PID 2076 wrote to memory of 1748	2076	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	88
PID 2076 wrote to memory of 1748	2076	55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe	88

C:\Users\Admin\AppData\Local\Temp\55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe
"C:\Users\Admin\AppData\Local\Temp\55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4552
- C:\Users\Admin\AppData\Local\Temp\55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe
  "C:\Users\Admin\AppData\Local\Temp\55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:968
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\cd1d2282-9b6f-44ed-af7b-a368b7a8aa13" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:4924
- - C:\Users\Admin\AppData\Local\Temp\55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe
    "C:\Users\Admin\AppData\Local\Temp\55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2076
  - - C:\Users\Admin\AppData\Local\Temp\55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe
      "C:\Users\Admin\AppData\Local\Temp\55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:1748

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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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
0c861216e7ffc03964ec3234e93051a5

SHA1
4b07d0a6937960d1f34cfd0287c0be6380c15b26

SHA256
cb0e2055c68118d11d1c51bb091c4f88e60093f87d3da92b4b488dc5b8d2f8f6

SHA512
115712b4c9f2c3ec0c914d8a1e16b265b34abf32a30fa838edaccaeee910bebc904bf6f7d9e864d4cef950799301e3b02793ea6e32e9fefc44e7578e7b030245

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

Filesize
170B

MD5
98d1ccaead12f5cc42687e05ff781785

SHA1
50fa18820126958d0e17fed9be2fe9e77b54b5d8

SHA256
cf02944d143795b6ef063878e17be6b89327bbc7ab33f05791c8e41ebde72a1b

SHA512
82a5724139b12e9673eb4481d5e2cd91b4e178c4c2717fd0f59c24a8cc5d85889d337c9d1911978254876892a9c2065052d2e4338e258bba96313869902ff378

Download Submit
C:\Users\Admin\AppData\Local\cd1d2282-9b6f-44ed-af7b-a368b7a8aa13\55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68.exe

Filesize
814KB

MD5
960c9dad66df9d52c73f149540b6f7b3

SHA1
11920d07db2635587e2bb198d7c209d2e1be65ad

SHA256
55e76df782e2a76e93ae1cc632942a169794a544b9c472e1043ea5a5eb70bd68

SHA512
f1a64cf32418b1c932a0dc93521895eed60a87abdebba5f0c3bac4e3345655285038077e15f44014b6e840a07e5d9d1e944ed422148b62bc5059cf70537d0a14

Download Submit
memory/968-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/968-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/968-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/968-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/968-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1748-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1748-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1748-49-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1748-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1748-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1748-48-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1748-46-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1748-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1748-47-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1748-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1748-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1748-44-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2076-19-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/2076-23-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/4552-1-0x0000000002220000-0x00000000022C0000-memory.dmp

Filesize
640KB

Download
memory/4552-2-0x0000000002320000-0x000000000243B000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads