djvu | 0336cc8aff0e4974ede9e8901abeb10f836d50619cef1cb59aa41b447cea1ca5

General

Target

b7ea7d444d1ed5677537a96796a496dc.exe
Size

738KB
MD5

b7ea7d444d1ed5677537a96796a496dc
SHA1

738054720787a8f80e3a4f1bd92f08b3084190aa
SHA256

0336cc8aff0e4974ede9e8901abeb10f836d50619cef1cb59aa41b447cea1ca5
SHA512

6bfacd6fd078715661afc9e3657c625d8b941bfeeaf323ff798c7c7fb78c64f813c96c4a1cffeda08c2f820e8e315f0cc14944087a11d1502c4aeafaf068b2f0

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://acacaca.org/test2/get.php

Attributes

extension
.vvyu
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: support@bestyourmail.ch Reserve e-mail address to contact us: datarestorehelp@airmail.cc Your personal ID: 0531Jhyjd

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 10 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4544-131-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4544-132-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3592-134-0x0000000004370000-0x000000000448B000-memory.dmp	family_djvu
behavioral2/memory/4544-135-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4544-136-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4544-140-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1740-143-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1740-145-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1740-150-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1740-163-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Downloads MZ/PE file
Executes dropped EXE 2 IoCs

Processes:

build2.exebuild2.exe

pid process

4640 build2.exe
4796 build2.exe

pid	process
4640	build2.exe
4796	build2.exe

Checks computer location settings 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

b7ea7d444d1ed5677537a96796a496dc.exeb7ea7d444d1ed5677537a96796a496dc.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Control Panel\International\Geo\Nation	b7ea7d444d1ed5677537a96796a496dc.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Control Panel\International\Geo\Nation	b7ea7d444d1ed5677537a96796a496dc.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File Permissions Modification
T1222

Processes:

icacls.exe

pid process

3024 icacls.exe

pid	process
3024	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

b7ea7d444d1ed5677537a96796a496dc.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\7c7b2d94-ce80-4986-bb4c-3d9057349d08\\b7ea7d444d1ed5677537a96796a496dc.exe\" --AutoStart"	b7ea7d444d1ed5677537a96796a496dc.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.

Processes:

flow ioc

17 api.2ip.ua
19 api.2ip.ua
27 api.2ip.ua

flow	ioc
17	api.2ip.ua
19	api.2ip.ua
27	api.2ip.ua

Suspicious use of SetThreadContext 3 IoCs

Processes:

b7ea7d444d1ed5677537a96796a496dc.exeb7ea7d444d1ed5677537a96796a496dc.exebuild2.exe

description	pid	process	target process
PID 3592 set thread context of 4544	3592	b7ea7d444d1ed5677537a96796a496dc.exe	b7ea7d444d1ed5677537a96796a496dc.exe
PID 912 set thread context of 1740	912	b7ea7d444d1ed5677537a96796a496dc.exe	b7ea7d444d1ed5677537a96796a496dc.exe
PID 4640 set thread context of 4796	4640	build2.exe	build2.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

b7ea7d444d1ed5677537a96796a496dc.exeb7ea7d444d1ed5677537a96796a496dc.exe

pid	process
4544	b7ea7d444d1ed5677537a96796a496dc.exe
4544	b7ea7d444d1ed5677537a96796a496dc.exe
1740	b7ea7d444d1ed5677537a96796a496dc.exe
1740	b7ea7d444d1ed5677537a96796a496dc.exe

Suspicious use of WriteProcessMemory 37 IoCs

Processes:

b7ea7d444d1ed5677537a96796a496dc.exeb7ea7d444d1ed5677537a96796a496dc.exeb7ea7d444d1ed5677537a96796a496dc.exeb7ea7d444d1ed5677537a96796a496dc.exebuild2.exe

C:\Users\Admin\AppData\Local\Temp\b7ea7d444d1ed5677537a96796a496dc.exe
"C:\Users\Admin\AppData\Local\Temp\b7ea7d444d1ed5677537a96796a496dc.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3592

C:\Users\Admin\AppData\Local\Temp\b7ea7d444d1ed5677537a96796a496dc.exe
"C:\Users\Admin\AppData\Local\Temp\b7ea7d444d1ed5677537a96796a496dc.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4544

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\7c7b2d94-ce80-4986-bb4c-3d9057349d08" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:3024

C:\Users\Admin\AppData\Local\Temp\b7ea7d444d1ed5677537a96796a496dc.exe
"C:\Users\Admin\AppData\Local\Temp\b7ea7d444d1ed5677537a96796a496dc.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:912

C:\Users\Admin\AppData\Local\Temp\b7ea7d444d1ed5677537a96796a496dc.exe
"C:\Users\Admin\AppData\Local\Temp\b7ea7d444d1ed5677537a96796a496dc.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1740

C:\Users\Admin\AppData\Local\767f86a0-5b2c-427c-ae76-d87f537d3559\build2.exe
"C:\Users\Admin\AppData\Local\767f86a0-5b2c-427c-ae76-d87f537d3559\build2.exe"
5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4640

C:\Users\Admin\AppData\Local\767f86a0-5b2c-427c-ae76-d87f537d3559\build2.exe
"C:\Users\Admin\AppData\Local\767f86a0-5b2c-427c-ae76-d87f537d3559\build2.exe"
6⤵
- Executes dropped EXE
PID:4796

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

File Permissions Modification

1

T1222

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize
2KB

MD5
eba45bc75daf7421d4767f04582068ca

SHA1
e2d2b46d3780a8b7cdde6e542430f0da28684ce8

SHA256
87f79123a6048371f5e4eccca848509ff8315dea4be740c8480fe945c02b4f38

SHA512
0c081c029224806b1f1f200da673a9554e5d40756736f9ca8bc073c25703092c6d1e72a2fd971b41bedeba26e6ca9fa85486df39f852505925a49d8b94e0e330

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize
1KB

MD5
4f74b1c3f52834fb5d5d0946410f286a

SHA1
e8b1734733535d236f422c282271e97b784b5261

SHA256
56b6f9f565e620e3cc377ac2265180c96efff2844f11cbb229eef977327869f1

SHA512
b84101ebe8570b2f0ecbefafcf58b941100ac6efc9cbbfc711e57bedf6cb6fc62141bd2d66c34f4b316568948ff6448c96ddef2cfde625965a9ea5968beefb2c

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize
488B

MD5
0f2c324a07ea2659e5d8298b2a31c499

SHA1
951e2acd6686b11d95b0b70006ec1a78f9ef9404

SHA256
438d779b8e10692744f7a438efe31b15c1af144e2adddc8755ccc60a8bdab3bc

SHA512
de5441b87b9aeed92b43edbb021333f966ac27df2fbc81f7783265bc9f7f3703a4133aa32565cc79989538cb74a88d44e8a4b4469de76ca7e1401daf1f2be116

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize
396B

MD5
e141ae93bcf094ef0b3875bbe6fe1edc

SHA1
872c1b7fc5fde28dc54db49b730733da09cb4b8a

SHA256
bd886e6dd62d2705e9d69dd7954f7e4106e5b5d07fd46bc0a9765d4f8f112c0e

SHA512
295ea52dd9dec427ee0d355c58f7b6e324665654f7bc7eb80bd3889200b63884d87a0f58e9075f84cd3e34308e8d49cfbc22c0cb4d84e08e4496e1b8b29e64ed

Download Submit
C:\Users\Admin\AppData\Local\767f86a0-5b2c-427c-ae76-d87f537d3559\build2.exe
Filesize
438KB

MD5
2f3d0323ba962334ef87ed098ad02289

SHA1
5b4c70e331af83eaf384f45a01e322b094353375

SHA256
12a51367c5c85ff3c1dc73743cface2e01accecf2879a36adbddf566d52987b3

SHA512
1e33ace1068f614bfac35aa67733c2806328b586be273a611409df87be03c5edc9e312ab213004c8fab71453ef5e34e474d9273c4a97d95d135c18f440674ad3

Download Submit
C:\Users\Admin\AppData\Local\767f86a0-5b2c-427c-ae76-d87f537d3559\build2.exe
Filesize
438KB

MD5
2f3d0323ba962334ef87ed098ad02289

SHA1
5b4c70e331af83eaf384f45a01e322b094353375

SHA256
12a51367c5c85ff3c1dc73743cface2e01accecf2879a36adbddf566d52987b3

SHA512
1e33ace1068f614bfac35aa67733c2806328b586be273a611409df87be03c5edc9e312ab213004c8fab71453ef5e34e474d9273c4a97d95d135c18f440674ad3

Download Submit
C:\Users\Admin\AppData\Local\767f86a0-5b2c-427c-ae76-d87f537d3559\build2.exe
Filesize
438KB

MD5
2f3d0323ba962334ef87ed098ad02289

SHA1
5b4c70e331af83eaf384f45a01e322b094353375

SHA256
12a51367c5c85ff3c1dc73743cface2e01accecf2879a36adbddf566d52987b3

SHA512
1e33ace1068f614bfac35aa67733c2806328b586be273a611409df87be03c5edc9e312ab213004c8fab71453ef5e34e474d9273c4a97d95d135c18f440674ad3

Download Submit
C:\Users\Admin\AppData\Local\7c7b2d94-ce80-4986-bb4c-3d9057349d08\b7ea7d444d1ed5677537a96796a496dc.exe
Filesize
738KB

MD5
b7ea7d444d1ed5677537a96796a496dc

SHA1
738054720787a8f80e3a4f1bd92f08b3084190aa

SHA256
0336cc8aff0e4974ede9e8901abeb10f836d50619cef1cb59aa41b447cea1ca5

SHA512
6bfacd6fd078715661afc9e3657c625d8b941bfeeaf323ff798c7c7fb78c64f813c96c4a1cffeda08c2f820e8e315f0cc14944087a11d1502c4aeafaf068b2f0

Download Submit
memory/912-139-0x0000000000000000-mapping.dmp

Download
memory/912-144-0x00000000041D7000-0x0000000004269000-memory.dmp

Filesize
584KB

Download
memory/1740-150-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1740-163-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1740-141-0x0000000000000000-mapping.dmp

Download
memory/1740-143-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1740-145-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3024-137-0x0000000000000000-mapping.dmp

Download
memory/3592-151-0x0000000004370000-0x000000000448B000-memory.dmp

Filesize
1.1MB

Download
memory/3592-134-0x0000000004370000-0x000000000448B000-memory.dmp

Filesize
1.1MB

Download
memory/3592-133-0x00000000042D7000-0x0000000004369000-memory.dmp

Filesize
584KB

Download
memory/4544-131-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4544-136-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4544-130-0x0000000000000000-mapping.dmp

Download
memory/4544-135-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4544-132-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4544-140-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4640-152-0x0000000000000000-mapping.dmp

Download
memory/4640-158-0x00000000006CD000-0x00000000006F6000-memory.dmp

Filesize
164KB

Download
memory/4640-161-0x0000000002090000-0x00000000020D6000-memory.dmp

Filesize
280KB

Download
memory/4796-159-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/4796-160-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/4796-156-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/4796-162-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/4796-155-0x0000000000000000-mapping.dmp

Download
memory/4796-164-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download

description	pid	process	target process
PID 3592 wrote to memory of 4544	3592	b7ea7d444d1ed5677537a96796a496dc.exe	b7ea7d444d1ed5677537a96796a496dc.exe
PID 3592 wrote to memory of 4544	3592	b7ea7d444d1ed5677537a96796a496dc.exe	b7ea7d444d1ed5677537a96796a496dc.exe
PID 3592 wrote to memory of 4544	3592	b7ea7d444d1ed5677537a96796a496dc.exe	b7ea7d444d1ed5677537a96796a496dc.exe
PID 3592 wrote to memory of 4544	3592	b7ea7d444d1ed5677537a96796a496dc.exe	b7ea7d444d1ed5677537a96796a496dc.exe
PID 3592 wrote to memory of 4544	3592	b7ea7d444d1ed5677537a96796a496dc.exe	b7ea7d444d1ed5677537a96796a496dc.exe
PID 3592 wrote to memory of 4544	3592	b7ea7d444d1ed5677537a96796a496dc.exe	b7ea7d444d1ed5677537a96796a496dc.exe
PID 3592 wrote to memory of 4544	3592	b7ea7d444d1ed5677537a96796a496dc.exe	b7ea7d444d1ed5677537a96796a496dc.exe
PID 3592 wrote to memory of 4544	3592	b7ea7d444d1ed5677537a96796a496dc.exe	b7ea7d444d1ed5677537a96796a496dc.exe
PID 3592 wrote to memory of 4544	3592	b7ea7d444d1ed5677537a96796a496dc.exe	b7ea7d444d1ed5677537a96796a496dc.exe
PID 3592 wrote to memory of 4544	3592	b7ea7d444d1ed5677537a96796a496dc.exe	b7ea7d444d1ed5677537a96796a496dc.exe
PID 4544 wrote to memory of 3024	4544	b7ea7d444d1ed5677537a96796a496dc.exe	icacls.exe
PID 4544 wrote to memory of 3024	4544	b7ea7d444d1ed5677537a96796a496dc.exe	icacls.exe
PID 4544 wrote to memory of 3024	4544	b7ea7d444d1ed5677537a96796a496dc.exe	icacls.exe
PID 4544 wrote to memory of 912	4544	b7ea7d444d1ed5677537a96796a496dc.exe	b7ea7d444d1ed5677537a96796a496dc.exe
PID 4544 wrote to memory of 912	4544	b7ea7d444d1ed5677537a96796a496dc.exe	b7ea7d444d1ed5677537a96796a496dc.exe
PID 4544 wrote to memory of 912	4544	b7ea7d444d1ed5677537a96796a496dc.exe	b7ea7d444d1ed5677537a96796a496dc.exe
PID 912 wrote to memory of 1740	912	b7ea7d444d1ed5677537a96796a496dc.exe	b7ea7d444d1ed5677537a96796a496dc.exe
PID 912 wrote to memory of 1740	912	b7ea7d444d1ed5677537a96796a496dc.exe	b7ea7d444d1ed5677537a96796a496dc.exe
PID 912 wrote to memory of 1740	912	b7ea7d444d1ed5677537a96796a496dc.exe	b7ea7d444d1ed5677537a96796a496dc.exe
PID 912 wrote to memory of 1740	912	b7ea7d444d1ed5677537a96796a496dc.exe	b7ea7d444d1ed5677537a96796a496dc.exe
PID 912 wrote to memory of 1740	912	b7ea7d444d1ed5677537a96796a496dc.exe	b7ea7d444d1ed5677537a96796a496dc.exe
PID 912 wrote to memory of 1740	912	b7ea7d444d1ed5677537a96796a496dc.exe	b7ea7d444d1ed5677537a96796a496dc.exe
PID 912 wrote to memory of 1740	912	b7ea7d444d1ed5677537a96796a496dc.exe	b7ea7d444d1ed5677537a96796a496dc.exe
PID 912 wrote to memory of 1740	912	b7ea7d444d1ed5677537a96796a496dc.exe	b7ea7d444d1ed5677537a96796a496dc.exe
PID 912 wrote to memory of 1740	912	b7ea7d444d1ed5677537a96796a496dc.exe	b7ea7d444d1ed5677537a96796a496dc.exe
PID 912 wrote to memory of 1740	912	b7ea7d444d1ed5677537a96796a496dc.exe	b7ea7d444d1ed5677537a96796a496dc.exe
PID 1740 wrote to memory of 4640	1740	b7ea7d444d1ed5677537a96796a496dc.exe	build2.exe
PID 1740 wrote to memory of 4640	1740	b7ea7d444d1ed5677537a96796a496dc.exe	build2.exe
PID 1740 wrote to memory of 4640	1740	b7ea7d444d1ed5677537a96796a496dc.exe	build2.exe
PID 4640 wrote to memory of 4796	4640	build2.exe	build2.exe
PID 4640 wrote to memory of 4796	4640	build2.exe	build2.exe
PID 4640 wrote to memory of 4796	4640	build2.exe	build2.exe
PID 4640 wrote to memory of 4796	4640	build2.exe	build2.exe
PID 4640 wrote to memory of 4796	4640	build2.exe	build2.exe
PID 4640 wrote to memory of 4796	4640	build2.exe	build2.exe
PID 4640 wrote to memory of 4796	4640	build2.exe	build2.exe
PID 4640 wrote to memory of 4796	4640	build2.exe	build2.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads