djvu | 8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6

General

Target

8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.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/1900-2-0x0000000006070000-0x000000000618B000-memory.dmp	family_djvu
behavioral2/memory/2780-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2780-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2780-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2780-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2780-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1560-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1560-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1560-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1560-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1560-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1560-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1560-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1560-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1560-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1560-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1560-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

4124 icacls.exe

pid	process
4124	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3263309122-2820180308-3568046652-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\7178323c-419a-44b8-868f-7728cb504a38\\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe\" --AutoStart"	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.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

1 api.2ip.ua
2 api.2ip.ua
7 api.2ip.ua

flow	ioc
1	api.2ip.ua
2	api.2ip.ua
7	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe

description	pid	process	target process
PID 1900 set thread context of 2780	1900	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 3016 set thread context of 1560	3016	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.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:

8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe

pid	process
2780	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
2780	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
1560	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
1560	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe

C:\Users\Admin\AppData\Local\Temp\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
"C:\Users\Admin\AppData\Local\Temp\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1900

C:\Users\Admin\AppData\Local\Temp\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
"C:\Users\Admin\AppData\Local\Temp\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe"
2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2780

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\7178323c-419a-44b8-868f-7728cb504a38" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:4124

C:\Users\Admin\AppData\Local\Temp\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
"C:\Users\Admin\AppData\Local\Temp\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3016

C:\Users\Admin\AppData\Local\Temp\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
"C:\Users\Admin\AppData\Local\Temp\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:1560

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

System Information Discovery

1

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
472bf3354852e29c7a0836f957a3362e

SHA1
2954e052145f4db0349fcece3f2cf40a0c93d742

SHA256
72ab6d7a6fb25f9bdefad9c50374c6f9c0500538bfaa63aeb2593a226e1c5391

SHA512
72a3e87853dbdbb04be0f40d2eaada4cbf6e0981585b4fcaa964a5eb3ee6825f629e95e3eeee1698f9fa3305ba38484403a6b883e7b24cea5f666ccd2be4ccc5

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

MD5
b1ee03a08a620fd3995605fc4853b94a

SHA1
1b01f0c3a929c8a4287e7f68fe6c48421f92c4cd

SHA256
c1b73d54c138ea33b82d4d76b14602aecbbced5359fa804f4e07d3db981e7cd5

SHA512
00f963b75388a46e78d97d4c10d50fd3ad3391df47be2965e8b3bf387f4e7d98132b90e0d93f8291daca7ba0787bb0b4175a7c0fe4a452c22ea750d6b499c98a

Download Submit
C:\Users\Admin\AppData\Local\7178323c-419a-44b8-868f-7728cb504a38\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
Filesize
779KB

MD5
b35348f4654893767a081b076f7becdf

SHA1
05b4ff88303a5e72ff43d5554c4628cec9e71bf8

SHA256
8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6

SHA512
b634797706b5851ade5983aeac47f63723545e2d2c09f171871728a278f7cb72ab52d4eca73ff6648d6224a7c4da2ec261b4c6104fa2ab532334ddd5551b8e67

Download Submit
memory/1560-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1560-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1560-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1560-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1560-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1560-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1560-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1560-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1560-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1560-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1560-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1900-2-0x0000000006070000-0x000000000618B000-memory.dmp

Filesize
1.1MB

Download
memory/1900-1-0x0000000004760000-0x00000000047FF000-memory.dmp

Filesize
636KB

Download
memory/2780-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2780-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2780-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2780-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2780-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3016-20-0x0000000004530000-0x00000000045C4000-memory.dmp

Filesize
592KB

Download

description	pid	process	target process
PID 1900 wrote to memory of 2780	1900	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 1900 wrote to memory of 2780	1900	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 1900 wrote to memory of 2780	1900	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 1900 wrote to memory of 2780	1900	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 1900 wrote to memory of 2780	1900	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 1900 wrote to memory of 2780	1900	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 1900 wrote to memory of 2780	1900	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 1900 wrote to memory of 2780	1900	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 1900 wrote to memory of 2780	1900	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 1900 wrote to memory of 2780	1900	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 2780 wrote to memory of 4124	2780	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	icacls.exe
PID 2780 wrote to memory of 4124	2780	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	icacls.exe
PID 2780 wrote to memory of 4124	2780	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	icacls.exe
PID 2780 wrote to memory of 3016	2780	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 2780 wrote to memory of 3016	2780	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 2780 wrote to memory of 3016	2780	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 3016 wrote to memory of 1560	3016	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 3016 wrote to memory of 1560	3016	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 3016 wrote to memory of 1560	3016	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 3016 wrote to memory of 1560	3016	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 3016 wrote to memory of 1560	3016	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 3016 wrote to memory of 1560	3016	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 3016 wrote to memory of 1560	3016	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 3016 wrote to memory of 1560	3016	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 3016 wrote to memory of 1560	3016	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 3016 wrote to memory of 1560	3016	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads