djvu | 6d495ef15b5109636e685112122dfe1c5d854fbcf65a698fcb23a838c1c12200

Analysis

max time kernel
141s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
08/09/2022, 05:12

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General

Target

file.exe
Size

777KB
MD5

b3e457081acad76912cbdf15e3fb1dc7
SHA1

f22cc7127f02bc89995197612cf54f8b58b1c469
SHA256

6d495ef15b5109636e685112122dfe1c5d854fbcf65a698fcb23a838c1c12200
SHA512

3105046d5901efc114711346509f04fec06ed56c4d4f08496d8be2c8dfd828966aa54bb23f315c94db1bf2d9c3cda4fe1c7b0693315fc371a21c0a3488d8f112
SSDEEP

12288:NTQZCuhNEizhIDopI+RuUbLgw5Z7bhYzjdSB9o3/iqSDXHCw8HoUQF09jtTV:tWjEi2DMuUbLRBh8e9oqpn8XX9hTV

Score

10^/10

djvu discovery persistence ransomware spyware stealer

Malware Config

Extracted

Family

djvu

http://acacaca.org/test3/get.php

Attributes

extension
.mmvb
offline_id
yd6oYv6aBN90yFzTWdZ34sXSXtXiauzOLXZyWht1
payload_url
http://rgyui.top/dl/build2.exe

http://acacaca.org/files/1/build3.exe
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral2/memory/2888-133-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2888-137-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4956-136-0x00000000027F0000-0x000000000290B000-memory.dmp	family_djvu
behavioral2/memory/2888-134-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2888-138-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2888-142-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4368-147-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4368-145-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4368-148-0x0000000000400000-0x0000000000537000-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

pid	Process
4640	build2.exe
4892	build2.exe

Checks computer location settings 2 TTPs 3 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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	file.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	file.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	build2.exe

Loads dropped DLL 3 IoCs

pid	Process
4892	build2.exe
4892	build2.exe
4892	build2.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1480	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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\5b8ac53a-c30f-45ec-ac8f-2fd72e19738b\\file.exe\" --AutoStart"	file.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 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
22	api.2ip.ua
21	api.2ip.ua

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4956 set thread context of 2888	4956	file.exe	84
PID 1776 set thread context of 4368	1776	file.exe	90
PID 4640 set thread context of 4892	4640	build2.exe	98

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2744	4892	WerFault.exe	98

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

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

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2724	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
4592	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2888	file.exe
2888	file.exe
4368	file.exe
4368	file.exe
4892	build2.exe
4892	build2.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4592	taskkill.exe

Suspicious use of WriteProcessMemory 47 IoCs

description	pid	Process	procid_target
PID 4956 wrote to memory of 2888	4956	file.exe	84
PID 4956 wrote to memory of 2888	4956	file.exe	84
PID 4956 wrote to memory of 2888	4956	file.exe	84
PID 4956 wrote to memory of 2888	4956	file.exe	84
PID 4956 wrote to memory of 2888	4956	file.exe	84
PID 4956 wrote to memory of 2888	4956	file.exe	84
PID 4956 wrote to memory of 2888	4956	file.exe	84
PID 4956 wrote to memory of 2888	4956	file.exe	84
PID 4956 wrote to memory of 2888	4956	file.exe	84
PID 4956 wrote to memory of 2888	4956	file.exe	84
PID 2888 wrote to memory of 1480	2888	file.exe	85
PID 2888 wrote to memory of 1480	2888	file.exe	85
PID 2888 wrote to memory of 1480	2888	file.exe	85
PID 2888 wrote to memory of 1776	2888	file.exe	87
PID 2888 wrote to memory of 1776	2888	file.exe	87
PID 2888 wrote to memory of 1776	2888	file.exe	87
PID 1776 wrote to memory of 4368	1776	file.exe	90
PID 1776 wrote to memory of 4368	1776	file.exe	90
PID 1776 wrote to memory of 4368	1776	file.exe	90
PID 1776 wrote to memory of 4368	1776	file.exe	90
PID 1776 wrote to memory of 4368	1776	file.exe	90
PID 1776 wrote to memory of 4368	1776	file.exe	90
PID 1776 wrote to memory of 4368	1776	file.exe	90
PID 1776 wrote to memory of 4368	1776	file.exe	90
PID 1776 wrote to memory of 4368	1776	file.exe	90
PID 1776 wrote to memory of 4368	1776	file.exe	90
PID 4368 wrote to memory of 4640	4368	file.exe	97
PID 4368 wrote to memory of 4640	4368	file.exe	97
PID 4368 wrote to memory of 4640	4368	file.exe	97
PID 4640 wrote to memory of 4892	4640	build2.exe	98
PID 4640 wrote to memory of 4892	4640	build2.exe	98
PID 4640 wrote to memory of 4892	4640	build2.exe	98
PID 4640 wrote to memory of 4892	4640	build2.exe	98
PID 4640 wrote to memory of 4892	4640	build2.exe	98
PID 4640 wrote to memory of 4892	4640	build2.exe	98
PID 4640 wrote to memory of 4892	4640	build2.exe	98
PID 4640 wrote to memory of 4892	4640	build2.exe	98
PID 4640 wrote to memory of 4892	4640	build2.exe	98
PID 4892 wrote to memory of 4104	4892	build2.exe	99
PID 4892 wrote to memory of 4104	4892	build2.exe	99
PID 4892 wrote to memory of 4104	4892	build2.exe	99
PID 4104 wrote to memory of 4592	4104	cmd.exe	102
PID 4104 wrote to memory of 4592	4104	cmd.exe	102
PID 4104 wrote to memory of 4592	4104	cmd.exe	102
PID 4104 wrote to memory of 2724	4104	cmd.exe	104
PID 4104 wrote to memory of 2724	4104	cmd.exe	104
PID 4104 wrote to memory of 2724	4104	cmd.exe	104

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4956
- C:\Users\Admin\AppData\Local\Temp\file.exe
  "C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2888
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\5b8ac53a-c30f-45ec-ac8f-2fd72e19738b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1480
- - C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1776
  - - C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Checks computer location settings
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of WriteProcessMemory
      PID:4368
    - - C:\Users\Admin\AppData\Local\2145ecd4-d9b4-4db1-8d72-045c4d367a9d\build2.exe
        
        "C:\Users\Admin\AppData\Local\2145ecd4-d9b4-4db1-8d72-045c4d367a9d\build2.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious use of WriteProcessMemory
        
        PID:4640
      - C:\Users\Admin\AppData\Local\2145ecd4-d9b4-4db1-8d72-045c4d367a9d\build2.exe
        
        "C:\Users\Admin\AppData\Local\2145ecd4-d9b4-4db1-8d72-045c4d367a9d\build2.exe"
        6⤵
        Executes dropped EXE
        Checks computer location settings
        Loads dropped DLL
        Checks processor information in registry
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of WriteProcessMemory
        
        PID:4892
        
        C:\Windows\SysWOW64\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\2145ecd4-d9b4-4db1-8d72-045c4d367a9d\build2.exe" & del C:\PrograData\*.dll & exit
        7⤵
        Suspicious use of WriteProcessMemory
        
        PID:4104
        
        C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im build2.exe /f
        8⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4592
        
        C:\Windows\SysWOW64\timeout.exe
        
        timeout /t 6
        8⤵
        Delays execution with timeout.exe
        
        PID:2724
        
        C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4892 -s 1864
        7⤵
        Program crash
        
        PID:2744

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4892 -ip 4892
1⤵
PID:3840

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

File and Directory 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

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\mozglue.dll

Filesize
133KB

MD5
8f73c08a9660691143661bf7332c3c27

SHA1
37fa65dd737c50fda710fdbde89e51374d0c204a

SHA256
3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

SHA512
0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

Download Submit
C:\ProgramData\nss3.dll

Filesize
1.2MB

MD5
bfac4e3c5908856ba17d41edcd455a51

SHA1
8eec7e888767aa9e4cca8ff246eb2aacb9170428

SHA256
e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

SHA512
2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

Download Submit
C:\ProgramData\sqlite3.dll

Filesize
630KB

MD5
e477a96c8f2b18d6b5c27bde49c990bf

SHA1
e980c9bf41330d1e5bd04556db4646a0210f7409

SHA256
16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660

SHA512
335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c

Download Submit
C:\Users\Admin\AppData\Local\2145ecd4-d9b4-4db1-8d72-045c4d367a9d\build2.exe

Filesize
383KB

MD5
8d7db6982df46c3b0f0cc879d892c08a

SHA1
64e3d7ab4793aeb05d18a82159c579e05c45fd71

SHA256
116e15e94d70dde65f91f155580bd9b34ff1956b9ebe1a53b6bce912b281c1f6

SHA512
0eeb242e6e1356a2a9e3183f12439ef36fac40e27ac8c0df5f591c7b3c1324145627c92c3fee15aedee2c1e8cc3b966152af73a33196166c2c1bfbbd979bdb5b

Download Submit
C:\Users\Admin\AppData\Local\2145ecd4-d9b4-4db1-8d72-045c4d367a9d\build2.exe

Filesize
383KB

MD5
8d7db6982df46c3b0f0cc879d892c08a

SHA1
64e3d7ab4793aeb05d18a82159c579e05c45fd71

SHA256
116e15e94d70dde65f91f155580bd9b34ff1956b9ebe1a53b6bce912b281c1f6

SHA512
0eeb242e6e1356a2a9e3183f12439ef36fac40e27ac8c0df5f591c7b3c1324145627c92c3fee15aedee2c1e8cc3b966152af73a33196166c2c1bfbbd979bdb5b

Download Submit
C:\Users\Admin\AppData\Local\2145ecd4-d9b4-4db1-8d72-045c4d367a9d\build2.exe

Filesize
383KB

MD5
8d7db6982df46c3b0f0cc879d892c08a

SHA1
64e3d7ab4793aeb05d18a82159c579e05c45fd71

SHA256
116e15e94d70dde65f91f155580bd9b34ff1956b9ebe1a53b6bce912b281c1f6

SHA512
0eeb242e6e1356a2a9e3183f12439ef36fac40e27ac8c0df5f591c7b3c1324145627c92c3fee15aedee2c1e8cc3b966152af73a33196166c2c1bfbbd979bdb5b

Download Submit
C:\Users\Admin\AppData\Local\5b8ac53a-c30f-45ec-ac8f-2fd72e19738b\file.exe

Filesize
777KB

MD5
b3e457081acad76912cbdf15e3fb1dc7

SHA1
f22cc7127f02bc89995197612cf54f8b58b1c469

SHA256
6d495ef15b5109636e685112122dfe1c5d854fbcf65a698fcb23a838c1c12200

SHA512
3105046d5901efc114711346509f04fec06ed56c4d4f08496d8be2c8dfd828966aa54bb23f315c94db1bf2d9c3cda4fe1c7b0693315fc371a21c0a3488d8f112

Download Submit
memory/1776-146-0x000000000251E000-0x00000000025AF000-memory.dmp

Filesize
580KB

Download
memory/2888-138-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2888-137-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2888-134-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2888-142-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2888-133-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4368-147-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4368-145-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4368-148-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4640-157-0x0000000002460000-0x00000000024A9000-memory.dmp

Filesize
292KB

Download
memory/4892-158-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/4892-159-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/4892-154-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/4892-156-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/4892-166-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/4956-136-0x00000000027F0000-0x000000000290B000-memory.dmp

Filesize
1.1MB

Download
memory/4956-135-0x0000000002642000-0x00000000026D3000-memory.dmp

Filesize
580KB

Download