djvu | a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063

General

Target

a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063.exe
Size

792KB
MD5

e52c16df005e3bfa2d777e5cdbdb5cf0
SHA1

ca5ae40790f5169854af1a30f5f9dc2d9342110d
SHA256

a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063
SHA512

11e3ca6905a7535896b24e222dbc1ced6b8e09e1b11b043e3368f6a92d2f2d5357a3468a6fc074875bb15c6b02c869bb4488a5b92b22dd972edabebd5030cc72
SSDEEP

12288:qjBBn1JKBYkIjuayt4lqb2VniwQ+SDVQvDH89aa2rBiCs4YHUtl5DcYVS:qjnnvKGTqalMbDK7H89TiiqYy4YU

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.mppn
offline_id
d1BN9KEra4Hetg5GUH0nQZqy14sntD2NbihzGQt1
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 5 IoCs

resource	yara_rule
behavioral1/memory/3596-133-0x0000000002380000-0x000000000249B000-memory.dmp	family_djvu
behavioral1/memory/4588-135-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4588-136-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4588-137-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4588-138-0x0000000000400000-0x0000000000537000-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

pid	Process
916	icacls.exe

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-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\8be13868-5a19-4fe8-aa5a-3bbeee6f2b1f\\a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063.exe\" --AutoStart"	a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063.exe

Looks up external IP address via web service 1 IoCs

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

flow	ioc
48	api.2ip.ua

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3596 set thread context of 4588	3596	a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063.exe	82

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 2 IoCs

pid	Process
4588	a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063.exe
4588	a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 3596 wrote to memory of 4588	3596	a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063.exe	82
PID 3596 wrote to memory of 4588	3596	a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063.exe	82
PID 3596 wrote to memory of 4588	3596	a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063.exe	82
PID 3596 wrote to memory of 4588	3596	a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063.exe	82
PID 3596 wrote to memory of 4588	3596	a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063.exe	82
PID 3596 wrote to memory of 4588	3596	a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063.exe	82
PID 3596 wrote to memory of 4588	3596	a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063.exe	82
PID 3596 wrote to memory of 4588	3596	a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063.exe	82
PID 3596 wrote to memory of 4588	3596	a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063.exe	82
PID 3596 wrote to memory of 4588	3596	a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063.exe	82
PID 4588 wrote to memory of 916	4588	a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063.exe	83
PID 4588 wrote to memory of 916	4588	a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063.exe	83
PID 4588 wrote to memory of 916	4588	a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063.exe	83

C:\Users\Admin\AppData\Local\Temp\a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063.exe
"C:\Users\Admin\AppData\Local\Temp\a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3596
- C:\Users\Admin\AppData\Local\Temp\a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063.exe
  "C:\Users\Admin\AppData\Local\Temp\a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4588
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\8be13868-5a19-4fe8-aa5a-3bbeee6f2b1f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:916

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\8be13868-5a19-4fe8-aa5a-3bbeee6f2b1f\a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063.exe

Filesize
792KB

MD5
e52c16df005e3bfa2d777e5cdbdb5cf0

SHA1
ca5ae40790f5169854af1a30f5f9dc2d9342110d

SHA256
a3234dfcb3595948bd7afcdb604925d0aa0ad8d611f2aba855ed52c79dda3063

SHA512
11e3ca6905a7535896b24e222dbc1ced6b8e09e1b11b043e3368f6a92d2f2d5357a3468a6fc074875bb15c6b02c869bb4488a5b92b22dd972edabebd5030cc72

Download Submit
memory/3596-132-0x00000000022E7000-0x0000000002379000-memory.dmp

Filesize
584KB

Download
memory/3596-133-0x0000000002380000-0x000000000249B000-memory.dmp

Filesize
1.1MB

Download
memory/4588-135-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4588-136-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4588-137-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4588-138-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing