djvu | a27483fe804d0e199d0bfe075a907e3a94d057ee95799cd633b41ac151372885

General

Target

b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe
Size

815KB
MD5

218d225011859a07ef0137e9314be2d0
SHA1

5e1645cde252685e2fcfb8a93b88c104882ac6d3
SHA256

b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab
SHA512

ec4c3f21f52d9a4338478ceb1ed1d28704d570ae3d7314d0296c2fdd5f0a32be99222fa3fa58eaafde2471330855c49fbdcefdecf3d97b27722cc33df7e996ee
SSDEEP

12288:SEJudv2Cy3nRH+BfcS6VC+bamRinL/6qmq3drGO5ddh+Zx1Fe3Lk6wHkBuDwzUY5:Yv43p4/6xVyLSqmg+VFe3LvCUX0gg8r

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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 18 IoCs

resource	yara_rule
behavioral2/memory/4144-2-0x0000000002330000-0x000000000244B000-memory.dmp	family_djvu
behavioral2/memory/4680-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4680-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4680-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4680-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4680-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2376-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2376-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2376-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2376-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2376-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2376-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2376-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2376-44-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2376-46-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2376-47-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2376-48-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2376-49-0x0000000000400000-0x0000000000537000-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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3968	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-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\73a9014c-7f3a-4e46-8f07-97ca549c8edf\\b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe\" --AutoStart"	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.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
6	api.2ip.ua
9	api.2ip.ua
21	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4144 set thread context of 4680	4144	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	82
PID 2640 set thread context of 2376	2640	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	86

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	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4680	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe
4680	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe
2376	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe
2376	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4144 wrote to memory of 4680	4144	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	82
PID 4144 wrote to memory of 4680	4144	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	82
PID 4144 wrote to memory of 4680	4144	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	82
PID 4144 wrote to memory of 4680	4144	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	82
PID 4144 wrote to memory of 4680	4144	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	82
PID 4144 wrote to memory of 4680	4144	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	82
PID 4144 wrote to memory of 4680	4144	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	82
PID 4144 wrote to memory of 4680	4144	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	82
PID 4144 wrote to memory of 4680	4144	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	82
PID 4144 wrote to memory of 4680	4144	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	82
PID 4680 wrote to memory of 3968	4680	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	83
PID 4680 wrote to memory of 3968	4680	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	83
PID 4680 wrote to memory of 3968	4680	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	83
PID 4680 wrote to memory of 2640	4680	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	84
PID 4680 wrote to memory of 2640	4680	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	84
PID 4680 wrote to memory of 2640	4680	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	84
PID 2640 wrote to memory of 2376	2640	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	86
PID 2640 wrote to memory of 2376	2640	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	86
PID 2640 wrote to memory of 2376	2640	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	86
PID 2640 wrote to memory of 2376	2640	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	86
PID 2640 wrote to memory of 2376	2640	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	86
PID 2640 wrote to memory of 2376	2640	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	86
PID 2640 wrote to memory of 2376	2640	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	86
PID 2640 wrote to memory of 2376	2640	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	86
PID 2640 wrote to memory of 2376	2640	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	86
PID 2640 wrote to memory of 2376	2640	b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe	86

C:\Users\Admin\AppData\Local\Temp\b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe
"C:\Users\Admin\AppData\Local\Temp\b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4144
- C:\Users\Admin\AppData\Local\Temp\b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe
  "C:\Users\Admin\AppData\Local\Temp\b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.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:4680
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\73a9014c-7f3a-4e46-8f07-97ca549c8edf" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:3968
- - C:\Users\Admin\AppData\Local\Temp\b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe
    "C:\Users\Admin\AppData\Local\Temp\b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2640
  - - C:\Users\Admin\AppData\Local\Temp\b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe
      "C:\Users\Admin\AppData\Local\Temp\b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:2376

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

Replay Monitor

Loading Replay Monitor...

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
af5a5a7e308773b7c2adb8d8d4b73e66

SHA1
89d01c66196e73abe448bb69c0f9e619034706bc

SHA256
cc68ceb6503edd631c5a9e9dc5ef460c452f750825b407bccede60918b208f80

SHA512
ee062903ddd5e53a93d76e8fb5d1d01105e8504d31318db5fdca7a5e997a9e55cb87f1e07fa7defc867aa31e1dc3b0c2b0d555baa200749358ae9d49ef99d88a

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

Filesize
170B

MD5
9a2da3dd5166da6dcbb18e2654efbbf8

SHA1
12d9ea8775fe72ea6a754546bad9f77486db2ae5

SHA256
c705b6acdd3a5ffad0109c3260a55353e8d17620f88bec33127b61013c072218

SHA512
92eb0c61f939d15c7500bf97be022215178296da999c9353378ab357299709604b469f7ff8df88f8165e6b1ed12e15dea8926c11200938c81af70ea170395549

Download Submit
C:\Users\Admin\AppData\Local\73a9014c-7f3a-4e46-8f07-97ca549c8edf\b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab.exe

Filesize
815KB

MD5
218d225011859a07ef0137e9314be2d0

SHA1
5e1645cde252685e2fcfb8a93b88c104882ac6d3

SHA256
b68c1d3bdf40f24187d3136c0baa7b7e1d2c17c81dcbfa3132aeb91f1e6568ab

SHA512
ec4c3f21f52d9a4338478ceb1ed1d28704d570ae3d7314d0296c2fdd5f0a32be99222fa3fa58eaafde2471330855c49fbdcefdecf3d97b27722cc33df7e996ee

Download Submit
memory/2376-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2376-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2376-49-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2376-48-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2376-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2376-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2376-47-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2376-46-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2376-44-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2376-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2376-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2376-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2640-23-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/2640-19-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/4144-2-0x0000000002330000-0x000000000244B000-memory.dmp

Filesize
1.1MB

Download
memory/4144-1-0x0000000002290000-0x0000000002328000-memory.dmp

Filesize
608KB

Download
memory/4680-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4680-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4680-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4680-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4680-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads