djvu | d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84

General

Target

d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
Size

706KB
MD5

d0eec83439402a84e02f3afd3b203738
SHA1

67b844fe41265e47f97fd3c72225d5c041296f93
SHA256

d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84
SHA512

e31bc4c9266f3a23236ea0603e92ee38e3416c27e47ec853537c92b8dc0c39d29a78893ef1e72ab59d1aac0ebf8bf9e3f6516f828e03d6ade988789f15a434da
SSDEEP

12288:7qkhwkQBK6G4tGz7V1meMmrLihBs0NlqBxZdTJ/EzOaNBRUdb:7WkQA6G4tJeMwL8CZBJ/EKmRU

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.kcvp
offline_id
hlqzhQ6w5SquNDF4Ul2XBDJQkSIKbAT6rmRBTit1
payload_url
http://uaery.top/dl/build2.exe

http://fresherlights.com/files/1/build3.exe
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 10 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1272-133-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1272-134-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4760-136-0x0000000002550000-0x000000000266B000-memory.dmp	family_djvu
behavioral1/memory/1272-137-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1272-138-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4760-139-0x0000000002550000-0x000000000266B000-memory.dmp	family_djvu
behavioral1/memory/1272-143-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2584-147-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2584-148-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2584-150-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

build2.exe

pid process

1372 build2.exe

pid	process
1372	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:

d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exed5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4060001867-1434967833-2212371794-1000\Control Panel\International\Geo\Nation	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4060001867-1434967833-2212371794-1000\Control Panel\International\Geo\Nation	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File Permissions Modification
T1222

Processes:

icacls.exe

pid process

4080 icacls.exe

pid	process
4080	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4060001867-1434967833-2212371794-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\977ec664-83eb-425c-9e22-d21c79eebcb5\\d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe\" --AutoStart"	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe

Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

26 api.2ip.ua
27 api.2ip.ua

flow	ioc
26	api.2ip.ua
27	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exed5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe

description	pid	process	target process
PID 4760 set thread context of 1272	4760	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
PID 3644 set thread context of 2584	3644	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.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:

d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exed5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe

pid	process
1272	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
1272	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
2584	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
2584	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe

Suspicious use of WriteProcessMemory 29 IoCs

Processes:

d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exed5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exed5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exed5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe

C:\Users\Admin\AppData\Local\Temp\d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
"C:\Users\Admin\AppData\Local\Temp\d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4760

C:\Users\Admin\AppData\Local\Temp\d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
"C:\Users\Admin\AppData\Local\Temp\d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1272

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\977ec664-83eb-425c-9e22-d21c79eebcb5" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:4080

C:\Users\Admin\AppData\Local\Temp\d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
"C:\Users\Admin\AppData\Local\Temp\d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3644

C:\Users\Admin\AppData\Local\Temp\d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
"C:\Users\Admin\AppData\Local\Temp\d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2584

C:\Users\Admin\AppData\Local\eda86f1b-1e18-45f9-bf8a-8ce51f8ca37b\build2.exe
"C:\Users\Admin\AppData\Local\eda86f1b-1e18-45f9-bf8a-8ce51f8ca37b\build2.exe"
5⤵
- Executes dropped EXE
PID:1372

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\Local\977ec664-83eb-425c-9e22-d21c79eebcb5\d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
Filesize
706KB

MD5
d0eec83439402a84e02f3afd3b203738

SHA1
67b844fe41265e47f97fd3c72225d5c041296f93

SHA256
d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84

SHA512
e31bc4c9266f3a23236ea0603e92ee38e3416c27e47ec853537c92b8dc0c39d29a78893ef1e72ab59d1aac0ebf8bf9e3f6516f828e03d6ade988789f15a434da

Download Submit
C:\Users\Admin\AppData\Local\eda86f1b-1e18-45f9-bf8a-8ce51f8ca37b\build2.exe
Filesize
299KB

MD5
03ddc9dc7312d33ad1c5f6ed2d167645

SHA1
e75de38aee3b0beb5cc91334ecbd8a876c8351a6

SHA256
60724da01de35adee6cb34317cd2947fbcb791a8381386d79072857a19a58708

SHA512
9a23eb681563719a6ad9202038a307e842b9a60c16aec2f01ce422feca11ac8d6e1d0e9a30e110e17bec4421121643ac87f075eae8bf127dca2213f7a2c6f1aa

Download Submit
C:\Users\Admin\AppData\Local\eda86f1b-1e18-45f9-bf8a-8ce51f8ca37b\build2.exe
Filesize
299KB

MD5
03ddc9dc7312d33ad1c5f6ed2d167645

SHA1
e75de38aee3b0beb5cc91334ecbd8a876c8351a6

SHA256
60724da01de35adee6cb34317cd2947fbcb791a8381386d79072857a19a58708

SHA512
9a23eb681563719a6ad9202038a307e842b9a60c16aec2f01ce422feca11ac8d6e1d0e9a30e110e17bec4421121643ac87f075eae8bf127dca2213f7a2c6f1aa

Download Submit
memory/1272-143-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1272-133-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1272-134-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1272-137-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1272-138-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1272-132-0x0000000000000000-mapping.dmp

Download
memory/1372-151-0x0000000000000000-mapping.dmp

Download
memory/2584-148-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2584-144-0x0000000000000000-mapping.dmp

Download
memory/2584-147-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2584-150-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3644-142-0x0000000000000000-mapping.dmp

Download
memory/3644-146-0x000000000239E000-0x0000000002430000-memory.dmp

Filesize
584KB

Download
memory/4080-140-0x0000000000000000-mapping.dmp

Download
memory/4760-139-0x0000000002550000-0x000000000266B000-memory.dmp

Filesize
1.1MB

Download
memory/4760-136-0x0000000002550000-0x000000000266B000-memory.dmp

Filesize
1.1MB

Download
memory/4760-135-0x0000000002482000-0x0000000002514000-memory.dmp

Filesize
584KB

Download

description	pid	process	target process
PID 4760 wrote to memory of 1272	4760	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
PID 4760 wrote to memory of 1272	4760	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
PID 4760 wrote to memory of 1272	4760	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
PID 4760 wrote to memory of 1272	4760	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
PID 4760 wrote to memory of 1272	4760	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
PID 4760 wrote to memory of 1272	4760	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
PID 4760 wrote to memory of 1272	4760	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
PID 4760 wrote to memory of 1272	4760	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
PID 4760 wrote to memory of 1272	4760	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
PID 4760 wrote to memory of 1272	4760	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
PID 1272 wrote to memory of 4080	1272	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	icacls.exe
PID 1272 wrote to memory of 4080	1272	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	icacls.exe
PID 1272 wrote to memory of 4080	1272	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	icacls.exe
PID 1272 wrote to memory of 3644	1272	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
PID 1272 wrote to memory of 3644	1272	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
PID 1272 wrote to memory of 3644	1272	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
PID 3644 wrote to memory of 2584	3644	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
PID 3644 wrote to memory of 2584	3644	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
PID 3644 wrote to memory of 2584	3644	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
PID 3644 wrote to memory of 2584	3644	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
PID 3644 wrote to memory of 2584	3644	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
PID 3644 wrote to memory of 2584	3644	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
PID 3644 wrote to memory of 2584	3644	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
PID 3644 wrote to memory of 2584	3644	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
PID 3644 wrote to memory of 2584	3644	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
PID 3644 wrote to memory of 2584	3644	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe
PID 2584 wrote to memory of 1372	2584	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	build2.exe
PID 2584 wrote to memory of 1372	2584	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	build2.exe
PID 2584 wrote to memory of 1372	2584	d5731b8304399709aaba28cf1625e8e3018f665cd74b93fd19d1cd5d0a436b84.exe	build2.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads