djvu | 6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad

General

Target

6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe
Size

760KB
MD5

c6151a4c996f7b027475f9520b6ea15e
SHA1

f9df90d184aa6865ca9d0fd44e47338f327a418a
SHA256

6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad
SHA512

d199a74a4b28946421793fb0e918ae682abf5fb0e5e0bd5d1c7f927d9e26dd499ac2e9fa7d27e8ab004fba6ac50b7c37dec8464dea58004a7484dc317d949b2b
SSDEEP

12288:tsGlC7+67EStRUWemiz5kUajjVzih0OuLhr9JU5i3jBDJFT5f:tJCimEAFz3YuNrDyi3RLT5

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://zexeq.com/raud/get.php

Attributes

extension
.ooza
offline_id
dhL6XvokZotUzL67Na5WfNIBufODsob7eYc3mzt1
payload_url
http://colisumy.com/dl/build2.exe

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

Signatures

Detected Djvu ransomware 10 IoCs

resource	yara_rule
behavioral2/memory/2304-2-0x0000000002670000-0x000000000278B000-memory.dmp	family_djvu
behavioral2/memory/1496-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1496-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1496-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1496-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1496-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1496-16-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/500-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/500-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/500-21-0x0000000000400000-0x0000000000537000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\Control Panel\International\Geo\Nation	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3452	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\68b87930-385a-4a20-a435-ccba4a80b89c\\6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe\" --AutoStart"	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.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.

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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2304 set thread context of 1496	2304	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	83
PID 3520 set thread context of 500	3520	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	92

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4420	500	WerFault.exe	92

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1496	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe
1496	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2304 wrote to memory of 1496	2304	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	83
PID 2304 wrote to memory of 1496	2304	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	83
PID 2304 wrote to memory of 1496	2304	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	83
PID 2304 wrote to memory of 1496	2304	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	83
PID 2304 wrote to memory of 1496	2304	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	83
PID 2304 wrote to memory of 1496	2304	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	83
PID 2304 wrote to memory of 1496	2304	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	83
PID 2304 wrote to memory of 1496	2304	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	83
PID 2304 wrote to memory of 1496	2304	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	83
PID 2304 wrote to memory of 1496	2304	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	83
PID 1496 wrote to memory of 3452	1496	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	85
PID 1496 wrote to memory of 3452	1496	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	85
PID 1496 wrote to memory of 3452	1496	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	85
PID 1496 wrote to memory of 3520	1496	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	89
PID 1496 wrote to memory of 3520	1496	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	89
PID 1496 wrote to memory of 3520	1496	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	89
PID 3520 wrote to memory of 500	3520	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	92
PID 3520 wrote to memory of 500	3520	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	92
PID 3520 wrote to memory of 500	3520	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	92
PID 3520 wrote to memory of 500	3520	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	92
PID 3520 wrote to memory of 500	3520	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	92
PID 3520 wrote to memory of 500	3520	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	92
PID 3520 wrote to memory of 500	3520	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	92
PID 3520 wrote to memory of 500	3520	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	92
PID 3520 wrote to memory of 500	3520	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	92
PID 3520 wrote to memory of 500	3520	6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe	92

C:\Users\Admin\AppData\Local\Temp\6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe
"C:\Users\Admin\AppData\Local\Temp\6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2304
- C:\Users\Admin\AppData\Local\Temp\6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe
  "C:\Users\Admin\AppData\Local\Temp\6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1496
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\68b87930-385a-4a20-a435-ccba4a80b89c" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3452
- - C:\Users\Admin\AppData\Local\Temp\6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe
    "C:\Users\Admin\AppData\Local\Temp\6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3520
  - - C:\Users\Admin\AppData\Local\Temp\6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe
      "C:\Users\Admin\AppData\Local\Temp\6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:500
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 500 -s 568
        5⤵
        Program crash
        
        PID:4420

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 500 -ip 500
1⤵
PID:4392

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\68b87930-385a-4a20-a435-ccba4a80b89c\6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad.exe

Filesize
760KB

MD5
c6151a4c996f7b027475f9520b6ea15e

SHA1
f9df90d184aa6865ca9d0fd44e47338f327a418a

SHA256
6db6e0c709bd2bbeec5a5e6a5ff76b322af67e5d35ee2bda87cff5389f1a3aad

SHA512
d199a74a4b28946421793fb0e918ae682abf5fb0e5e0bd5d1c7f927d9e26dd499ac2e9fa7d27e8ab004fba6ac50b7c37dec8464dea58004a7484dc317d949b2b

Download Submit
memory/500-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/500-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/500-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1496-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1496-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1496-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1496-15-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1496-16-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1496-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2304-1-0x00000000025D0000-0x000000000266D000-memory.dmp

Filesize
628KB

Download
memory/2304-2-0x0000000002670000-0x000000000278B000-memory.dmp

Filesize
1.1MB

Download
memory/3520-19-0x0000000002470000-0x0000000002504000-memory.dmp

Filesize
592KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads