djvu | 55043585c15ff65ca4b8df91c0b0f1c883d4cfd40933c6d25c2d9159e2f0757c

Analysis

max time kernel
93s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20220721-en
resource tags

arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system
submitted
05-08-2022 07:31

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

7d3324aba9cb81871405761ea678c751.exe
Size

730KB
MD5

7d3324aba9cb81871405761ea678c751
SHA1

07d238ddaabe2010d5113354b5dac651c1dcf8c0
SHA256

55043585c15ff65ca4b8df91c0b0f1c883d4cfd40933c6d25c2d9159e2f0757c
SHA512

6b03d19642807f68e24f7b03f734ed3a2ee1bddfa543663cc4ab979eea1bd3c088d9375144fd1a1247d86c1d30f3641d9c9fa9114faaa159cc524e5d6732baf2

Score

10^/10

djvu discovery persistence ransomware spyware stealer

Malware Config

Extracted

Family

djvu

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/4536-131-0x0000000004270000-0x000000000438B000-memory.dmp	family_djvu
behavioral2/memory/2896-133-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2896-134-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2896-135-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2896-136-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2896-140-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4820-143-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4820-145-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4820-150-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4820-181-0x0000000000400000-0x0000000000537000-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

3100 build2.exe
1532 build2.exe

pid	process
3100	build2.exe
1532	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:

7d3324aba9cb81871405761ea678c751.exe7d3324aba9cb81871405761ea678c751.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2660308776-3705150086-26593515-1000\Control Panel\International\Geo\Nation	7d3324aba9cb81871405761ea678c751.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2660308776-3705150086-26593515-1000\Control Panel\International\Geo\Nation	7d3324aba9cb81871405761ea678c751.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File Permissions Modification
T1222

Processes:

icacls.exe

pid process

1184 icacls.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Accesses 2FA software files, possible credential harvesting 2 TTPs
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081

pid	process
1184	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

7d3324aba9cb81871405761ea678c751.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2660308776-3705150086-26593515-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\81d8d620-6ef8-43cc-adcc-5bbfc4958de1\\7d3324aba9cb81871405761ea678c751.exe\" --AutoStart"	7d3324aba9cb81871405761ea678c751.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
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

16 api.2ip.ua
17 api.2ip.ua
25 api.2ip.ua

flow	ioc
16	api.2ip.ua
17	api.2ip.ua
25	api.2ip.ua

Suspicious use of SetThreadContext 3 IoCs

Processes:

7d3324aba9cb81871405761ea678c751.exe7d3324aba9cb81871405761ea678c751.exebuild2.exe

description	pid	process	target process
PID 4536 set thread context of 2896	4536	7d3324aba9cb81871405761ea678c751.exe	7d3324aba9cb81871405761ea678c751.exe
PID 1164 set thread context of 4820	1164	7d3324aba9cb81871405761ea678c751.exe	7d3324aba9cb81871405761ea678c751.exe
PID 3100 set thread context of 1532	3100	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

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

build2.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	build2.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	build2.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

7d3324aba9cb81871405761ea678c751.exe7d3324aba9cb81871405761ea678c751.exebuild2.exe

pid	process
2896	7d3324aba9cb81871405761ea678c751.exe
2896	7d3324aba9cb81871405761ea678c751.exe
4820	7d3324aba9cb81871405761ea678c751.exe
4820	7d3324aba9cb81871405761ea678c751.exe
1532	build2.exe
1532	build2.exe

Suspicious use of WriteProcessMemory 37 IoCs

Processes:

7d3324aba9cb81871405761ea678c751.exe7d3324aba9cb81871405761ea678c751.exe7d3324aba9cb81871405761ea678c751.exe7d3324aba9cb81871405761ea678c751.exebuild2.exe

C:\Users\Admin\AppData\Local\Temp\7d3324aba9cb81871405761ea678c751.exe
"C:\Users\Admin\AppData\Local\Temp\7d3324aba9cb81871405761ea678c751.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4536

C:\Users\Admin\AppData\Local\Temp\7d3324aba9cb81871405761ea678c751.exe
"C:\Users\Admin\AppData\Local\Temp\7d3324aba9cb81871405761ea678c751.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2896

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\81d8d620-6ef8-43cc-adcc-5bbfc4958de1" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:1184

C:\Users\Admin\AppData\Local\Temp\7d3324aba9cb81871405761ea678c751.exe
"C:\Users\Admin\AppData\Local\Temp\7d3324aba9cb81871405761ea678c751.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1164

C:\Users\Admin\AppData\Local\Temp\7d3324aba9cb81871405761ea678c751.exe
"C:\Users\Admin\AppData\Local\Temp\7d3324aba9cb81871405761ea678c751.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4820

C:\Users\Admin\AppData\Local\1b3b1cca-8db6-4d25-81ce-c8ac3f6c9c59\build2.exe
"C:\Users\Admin\AppData\Local\1b3b1cca-8db6-4d25-81ce-c8ac3f6c9c59\build2.exe"
5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3100

C:\Users\Admin\AppData\Local\1b3b1cca-8db6-4d25-81ce-c8ac3f6c9c59\build2.exe
"C:\Users\Admin\AppData\Local\1b3b1cca-8db6-4d25-81ce-c8ac3f6c9c59\build2.exe"
6⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:1532

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

File Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

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
7ee11c7cb365ed8bcaa44df62d80c897

SHA1
1a2bb18c3250285e8945d42303059e18b29445c6

SHA256
81d236068f6488009aa8e6c031469d97804dc8bc73e0803bef19b46b34175020

SHA512
18c2296a4fd3354d6b5ae169efa7d3f7ebb9b3dac721faf17a3a26c20c75ee5faf3f1ecc4890a4b21fd1cb7a48abe99b064c0ddb66db3a20a23eb0c7c460a4ad

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

MD5
07cdb43e74d94c403d223ef5f600aa92

SHA1
dc775b92fbcc0d6cc36244e9dc1bef62f5cf734f

SHA256
688695b540ce72c07ca58685f980955a8ec985d9bae06f44caea6ebd1882863b

SHA512
5a43325a6172edc75defb14a2f07cd2e0eddf906c151484389a2654ded2dc503840796aaa8fe933b0e0254108c1ced638e341ff5f1e7851d4f56e382755ea21a

Download Submit
C:\Users\Admin\AppData\Local\1b3b1cca-8db6-4d25-81ce-c8ac3f6c9c59\build2.exe
Filesize
438KB

MD5
2f3d0323ba962334ef87ed098ad02289

SHA1
5b4c70e331af83eaf384f45a01e322b094353375

SHA256
12a51367c5c85ff3c1dc73743cface2e01accecf2879a36adbddf566d52987b3

SHA512
1e33ace1068f614bfac35aa67733c2806328b586be273a611409df87be03c5edc9e312ab213004c8fab71453ef5e34e474d9273c4a97d95d135c18f440674ad3

Download Submit
C:\Users\Admin\AppData\Local\1b3b1cca-8db6-4d25-81ce-c8ac3f6c9c59\build2.exe
Filesize
438KB

MD5
2f3d0323ba962334ef87ed098ad02289

SHA1
5b4c70e331af83eaf384f45a01e322b094353375

SHA256
12a51367c5c85ff3c1dc73743cface2e01accecf2879a36adbddf566d52987b3

SHA512
1e33ace1068f614bfac35aa67733c2806328b586be273a611409df87be03c5edc9e312ab213004c8fab71453ef5e34e474d9273c4a97d95d135c18f440674ad3

Download Submit
C:\Users\Admin\AppData\Local\1b3b1cca-8db6-4d25-81ce-c8ac3f6c9c59\build2.exe
Filesize
438KB

MD5
2f3d0323ba962334ef87ed098ad02289

SHA1
5b4c70e331af83eaf384f45a01e322b094353375

SHA256
12a51367c5c85ff3c1dc73743cface2e01accecf2879a36adbddf566d52987b3

SHA512
1e33ace1068f614bfac35aa67733c2806328b586be273a611409df87be03c5edc9e312ab213004c8fab71453ef5e34e474d9273c4a97d95d135c18f440674ad3

Download Submit
C:\Users\Admin\AppData\Local\81d8d620-6ef8-43cc-adcc-5bbfc4958de1\7d3324aba9cb81871405761ea678c751.exe
Filesize
730KB

MD5
7d3324aba9cb81871405761ea678c751

SHA1
07d238ddaabe2010d5113354b5dac651c1dcf8c0

SHA256
55043585c15ff65ca4b8df91c0b0f1c883d4cfd40933c6d25c2d9159e2f0757c

SHA512
6b03d19642807f68e24f7b03f734ed3a2ee1bddfa543663cc4ab979eea1bd3c088d9375144fd1a1247d86c1d30f3641d9c9fa9114faaa159cc524e5d6732baf2

Download Submit
memory/1164-144-0x0000000004275000-0x0000000004306000-memory.dmp

Filesize
580KB

Download
memory/1164-139-0x0000000000000000-mapping.dmp

Download
memory/1184-137-0x0000000000000000-mapping.dmp

Download
memory/1532-157-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/1532-182-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/1532-162-0x0000000060900000-0x0000000060992000-memory.dmp

Filesize
584KB

Download
memory/1532-161-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/1532-158-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/1532-155-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/1532-154-0x0000000000000000-mapping.dmp

Download
memory/2896-140-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2896-136-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2896-135-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2896-134-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2896-133-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2896-132-0x0000000000000000-mapping.dmp

Download
memory/3100-159-0x000000000072D000-0x0000000000756000-memory.dmp

Filesize
164KB

Download
memory/3100-151-0x0000000000000000-mapping.dmp

Download
memory/3100-160-0x0000000000640000-0x0000000000686000-memory.dmp

Filesize
280KB

Download
memory/4536-130-0x00000000026E5000-0x0000000002776000-memory.dmp

Filesize
580KB

Download
memory/4536-131-0x0000000004270000-0x000000000438B000-memory.dmp

Filesize
1.1MB

Download
memory/4820-150-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4820-145-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4820-143-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4820-181-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4820-141-0x0000000000000000-mapping.dmp

Download

description	pid	process	target process
PID 4536 wrote to memory of 2896	4536	7d3324aba9cb81871405761ea678c751.exe	7d3324aba9cb81871405761ea678c751.exe
PID 4536 wrote to memory of 2896	4536	7d3324aba9cb81871405761ea678c751.exe	7d3324aba9cb81871405761ea678c751.exe
PID 4536 wrote to memory of 2896	4536	7d3324aba9cb81871405761ea678c751.exe	7d3324aba9cb81871405761ea678c751.exe
PID 4536 wrote to memory of 2896	4536	7d3324aba9cb81871405761ea678c751.exe	7d3324aba9cb81871405761ea678c751.exe
PID 4536 wrote to memory of 2896	4536	7d3324aba9cb81871405761ea678c751.exe	7d3324aba9cb81871405761ea678c751.exe
PID 4536 wrote to memory of 2896	4536	7d3324aba9cb81871405761ea678c751.exe	7d3324aba9cb81871405761ea678c751.exe
PID 4536 wrote to memory of 2896	4536	7d3324aba9cb81871405761ea678c751.exe	7d3324aba9cb81871405761ea678c751.exe
PID 4536 wrote to memory of 2896	4536	7d3324aba9cb81871405761ea678c751.exe	7d3324aba9cb81871405761ea678c751.exe
PID 4536 wrote to memory of 2896	4536	7d3324aba9cb81871405761ea678c751.exe	7d3324aba9cb81871405761ea678c751.exe
PID 4536 wrote to memory of 2896	4536	7d3324aba9cb81871405761ea678c751.exe	7d3324aba9cb81871405761ea678c751.exe
PID 2896 wrote to memory of 1184	2896	7d3324aba9cb81871405761ea678c751.exe	icacls.exe
PID 2896 wrote to memory of 1184	2896	7d3324aba9cb81871405761ea678c751.exe	icacls.exe
PID 2896 wrote to memory of 1184	2896	7d3324aba9cb81871405761ea678c751.exe	icacls.exe
PID 2896 wrote to memory of 1164	2896	7d3324aba9cb81871405761ea678c751.exe	7d3324aba9cb81871405761ea678c751.exe
PID 2896 wrote to memory of 1164	2896	7d3324aba9cb81871405761ea678c751.exe	7d3324aba9cb81871405761ea678c751.exe
PID 2896 wrote to memory of 1164	2896	7d3324aba9cb81871405761ea678c751.exe	7d3324aba9cb81871405761ea678c751.exe
PID 1164 wrote to memory of 4820	1164	7d3324aba9cb81871405761ea678c751.exe	7d3324aba9cb81871405761ea678c751.exe
PID 1164 wrote to memory of 4820	1164	7d3324aba9cb81871405761ea678c751.exe	7d3324aba9cb81871405761ea678c751.exe
PID 1164 wrote to memory of 4820	1164	7d3324aba9cb81871405761ea678c751.exe	7d3324aba9cb81871405761ea678c751.exe
PID 1164 wrote to memory of 4820	1164	7d3324aba9cb81871405761ea678c751.exe	7d3324aba9cb81871405761ea678c751.exe
PID 1164 wrote to memory of 4820	1164	7d3324aba9cb81871405761ea678c751.exe	7d3324aba9cb81871405761ea678c751.exe
PID 1164 wrote to memory of 4820	1164	7d3324aba9cb81871405761ea678c751.exe	7d3324aba9cb81871405761ea678c751.exe
PID 1164 wrote to memory of 4820	1164	7d3324aba9cb81871405761ea678c751.exe	7d3324aba9cb81871405761ea678c751.exe
PID 1164 wrote to memory of 4820	1164	7d3324aba9cb81871405761ea678c751.exe	7d3324aba9cb81871405761ea678c751.exe
PID 1164 wrote to memory of 4820	1164	7d3324aba9cb81871405761ea678c751.exe	7d3324aba9cb81871405761ea678c751.exe
PID 1164 wrote to memory of 4820	1164	7d3324aba9cb81871405761ea678c751.exe	7d3324aba9cb81871405761ea678c751.exe
PID 4820 wrote to memory of 3100	4820	7d3324aba9cb81871405761ea678c751.exe	build2.exe
PID 4820 wrote to memory of 3100	4820	7d3324aba9cb81871405761ea678c751.exe	build2.exe
PID 4820 wrote to memory of 3100	4820	7d3324aba9cb81871405761ea678c751.exe	build2.exe
PID 3100 wrote to memory of 1532	3100	build2.exe	build2.exe
PID 3100 wrote to memory of 1532	3100	build2.exe	build2.exe
PID 3100 wrote to memory of 1532	3100	build2.exe	build2.exe
PID 3100 wrote to memory of 1532	3100	build2.exe	build2.exe
PID 3100 wrote to memory of 1532	3100	build2.exe	build2.exe
PID 3100 wrote to memory of 1532	3100	build2.exe	build2.exe
PID 3100 wrote to memory of 1532	3100	build2.exe	build2.exe
PID 3100 wrote to memory of 1532	3100	build2.exe	build2.exe