djvu | 8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6

General

Target

b35348f4654893767a081b076f7becdf.exe
Size

779KB
MD5

b35348f4654893767a081b076f7becdf
SHA1

05b4ff88303a5e72ff43d5554c4628cec9e71bf8
SHA256

8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6
SHA512

b634797706b5851ade5983aeac47f63723545e2d2c09f171871728a278f7cb72ab52d4eca73ff6648d6224a7c4da2ec261b4c6104fa2ab532334ddd5551b8e67
SSDEEP

12288:JHdymkH6+JdxrhhdF3wHogECWip4QBeXYeNaCA57tQL9ODxvZTTN85vaYkqC:JdkaCfrhhP3wi7rXYeNbaekDxRfO5zC

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test1/get.php

Attributes

extension
.bgjs
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
payload_url
http://sdfjhuz.com/dl/build2.exe
http://cajgtus.com/files/1/build3.exe
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4396-2-0x0000000005EB0000-0x0000000005FCB000-memory.dmp	family_djvu
behavioral2/memory/4664-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2572-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2572-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2572-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2572-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2572-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2572-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2572-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2572-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2572-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2572-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2572-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

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

Processes:

b35348f4654893767a081b076f7becdf.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2177723727-746291240-1644359950-1000\Control Panel\International\Geo\Nation	b35348f4654893767a081b076f7becdf.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

3444 icacls.exe

pid	process
3444	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

b35348f4654893767a081b076f7becdf.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2177723727-746291240-1644359950-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\1bba7caa-2a32-48df-a545-1e38302d58e6\\b35348f4654893767a081b076f7becdf.exe\" --AutoStart"	b35348f4654893767a081b076f7becdf.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

7 api.2ip.ua
8 api.2ip.ua
27 api.2ip.ua

flow	ioc
7	api.2ip.ua
8	api.2ip.ua
27	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

b35348f4654893767a081b076f7becdf.exeb35348f4654893767a081b076f7becdf.exe

description	pid	process	target process
PID 4396 set thread context of 4664	4396	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 4260 set thread context of 2572	4260	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

b35348f4654893767a081b076f7becdf.exeb35348f4654893767a081b076f7becdf.exe

pid	process
4664	b35348f4654893767a081b076f7becdf.exe
4664	b35348f4654893767a081b076f7becdf.exe
2572	b35348f4654893767a081b076f7becdf.exe
2572	b35348f4654893767a081b076f7becdf.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

b35348f4654893767a081b076f7becdf.exeb35348f4654893767a081b076f7becdf.exeb35348f4654893767a081b076f7becdf.exe

C:\Users\Admin\AppData\Local\Temp\b35348f4654893767a081b076f7becdf.exe
"C:\Users\Admin\AppData\Local\Temp\b35348f4654893767a081b076f7becdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4396

C:\Users\Admin\AppData\Local\Temp\b35348f4654893767a081b076f7becdf.exe
"C:\Users\Admin\AppData\Local\Temp\b35348f4654893767a081b076f7becdf.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4664

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\1bba7caa-2a32-48df-a545-1e38302d58e6" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:3444

C:\Users\Admin\AppData\Local\Temp\b35348f4654893767a081b076f7becdf.exe
"C:\Users\Admin\AppData\Local\Temp\b35348f4654893767a081b076f7becdf.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4260

C:\Users\Admin\AppData\Local\Temp\b35348f4654893767a081b076f7becdf.exe
"C:\Users\Admin\AppData\Local\Temp\b35348f4654893767a081b076f7becdf.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2572

Network

MITRE ATT&CK Matrix ATT&CK v13

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

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

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize
1KB

MD5
64f1ee0302fd3757c5d51637eb7bcb32

SHA1
cec51eef8866e2e40618d3006b04a2a57f3d988c

SHA256
0183623c960efa8b38cd681598e3e4f2ce442584b8e96d0ed99b066bb30b10d7

SHA512
23e5ba581a61d6df26c7307b95855d6cb7043d13b6ad57280b5cf85aa077da12ddb4b8fc2ba2be2064640892aa0c388c6605329cb63ed24d60ecb436a37dde54

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize
724B

MD5
8202a1cd02e7d69597995cabbe881a12

SHA1
8858d9d934b7aa9330ee73de6c476acf19929ff6

SHA256
58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

SHA512
97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize
410B

MD5
2346bedc20b3d63874e0035e794a9167

SHA1
36da098b4cddbc8daf113883f7527482f8444b1e

SHA256
74576d551eb700458cf3c5a3087e67474d1204b5f28c58bfca85a3cbb2227f93

SHA512
a6e2aef108c7f4cea8ddc73cd5d093ba1dfcf6ae4c8ca5cee8491a871d81a624c09bf708ced17c30cd414eb62021880b6d22c17cf0a8d7bb074e49b278ffd81d

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize
392B

MD5
f78b9a19c04522e385813720a15567f3

SHA1
0521e319dcc927d1f3b78b385cb9d0b68c4835f8

SHA256
92ba4f60b1411691b7b11bb9886fe9241108dbbad6c9712e0b7ba4a81dc24707

SHA512
c6362771f8135b7c804005742171c4f95b1736385fa2fc34a404e42573f933e98d0174c4af47cebc61cc420a4e50d19dcf4b4b615e754c4fd58c6fc9b6ff0881

Download Submit
C:\Users\Admin\AppData\Local\1bba7caa-2a32-48df-a545-1e38302d58e6\b35348f4654893767a081b076f7becdf.exe
Filesize
779KB

MD5
b35348f4654893767a081b076f7becdf

SHA1
05b4ff88303a5e72ff43d5554c4628cec9e71bf8

SHA256
8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6

SHA512
b634797706b5851ade5983aeac47f63723545e2d2c09f171871728a278f7cb72ab52d4eca73ff6648d6224a7c4da2ec261b4c6104fa2ab532334ddd5551b8e67

Download Submit
memory/2572-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2572-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2572-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2572-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2572-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2572-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2572-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2572-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2572-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2572-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2572-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4260-20-0x0000000004470000-0x000000000450C000-memory.dmp

Filesize
624KB

Download
memory/4396-2-0x0000000005EB0000-0x0000000005FCB000-memory.dmp

Filesize
1.1MB

Download
memory/4396-1-0x0000000004670000-0x0000000004707000-memory.dmp

Filesize
604KB

Download
memory/4664-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4664-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4664-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4664-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4664-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 4396 wrote to memory of 4664	4396	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 4396 wrote to memory of 4664	4396	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 4396 wrote to memory of 4664	4396	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 4396 wrote to memory of 4664	4396	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 4396 wrote to memory of 4664	4396	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 4396 wrote to memory of 4664	4396	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 4396 wrote to memory of 4664	4396	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 4396 wrote to memory of 4664	4396	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 4396 wrote to memory of 4664	4396	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 4396 wrote to memory of 4664	4396	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 4664 wrote to memory of 3444	4664	b35348f4654893767a081b076f7becdf.exe	icacls.exe
PID 4664 wrote to memory of 3444	4664	b35348f4654893767a081b076f7becdf.exe	icacls.exe
PID 4664 wrote to memory of 3444	4664	b35348f4654893767a081b076f7becdf.exe	icacls.exe
PID 4664 wrote to memory of 4260	4664	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 4664 wrote to memory of 4260	4664	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 4664 wrote to memory of 4260	4664	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 4260 wrote to memory of 2572	4260	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 4260 wrote to memory of 2572	4260	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 4260 wrote to memory of 2572	4260	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 4260 wrote to memory of 2572	4260	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 4260 wrote to memory of 2572	4260	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 4260 wrote to memory of 2572	4260	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 4260 wrote to memory of 2572	4260	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 4260 wrote to memory of 2572	4260	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 4260 wrote to memory of 2572	4260	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 4260 wrote to memory of 2572	4260	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads