djvu | 2f9c6d06d25dfea43bb52e9b81df3dd3ebdef5d066573494598e77c450937e8f

General

Target

82C4.exe
Size

768KB
MD5

663a7ee6f23102380056645ded592075
SHA1

42f7de8be635ed37f91c289a81e71bc67139adb9
SHA256

2f9c6d06d25dfea43bb52e9b81df3dd3ebdef5d066573494598e77c450937e8f
SHA512

9d4e890505ccda9a0b3cd971598153c1e33be481d10c1133851f621fc4aad148554977b3162d36cb97759fde5603cfebf7876ad39199eee0519ecd3b1f857d09
SSDEEP

12288:wyEfg9+yzz81R9K4UW/ug6nkYxMDoG8AGjn6PkRnTFXD1l9e8k7phRuHH8n4p:IQmQ43/rYE8vdnTFRU6H84

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://rlrz.org/fhsgtsspen6/get.php

Attributes

extension
.nqsq
offline_id
OGykROpbgxJhrG1qc9yB9PwnsSv1Eo04vOCP0rt1
payload_url
http://znpst.top/dl/build2.exe

http://rlrz.org/files/1/build3.exe
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral2/memory/2352-2-0x0000000000870000-0x000000000098B000-memory.dmp	family_djvu
behavioral2/memory/3284-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3284-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3284-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3284-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3284-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3336-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3336-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3336-26-0x0000000000400000-0x0000000000537000-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-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation	82C4.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4376	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-1-5-21-1194130065-3471212556-1656947724-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\d7872009-ce04-46df-b360-a96321fe1178\\82C4.exe\" --AutoStart"	82C4.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
12	api.2ip.ua
13	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2352 set thread context of 3284	2352	82C4.exe	82
PID 656 set thread context of 3336	656	82C4.exe	90

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
2560	3336	WerFault.exe	90

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	82C4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	82C4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	82C4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	82C4.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3284	82C4.exe
3284	82C4.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2352 wrote to memory of 3284	2352	82C4.exe	82
PID 2352 wrote to memory of 3284	2352	82C4.exe	82
PID 2352 wrote to memory of 3284	2352	82C4.exe	82
PID 2352 wrote to memory of 3284	2352	82C4.exe	82
PID 2352 wrote to memory of 3284	2352	82C4.exe	82
PID 2352 wrote to memory of 3284	2352	82C4.exe	82
PID 2352 wrote to memory of 3284	2352	82C4.exe	82
PID 2352 wrote to memory of 3284	2352	82C4.exe	82
PID 2352 wrote to memory of 3284	2352	82C4.exe	82
PID 2352 wrote to memory of 3284	2352	82C4.exe	82
PID 3284 wrote to memory of 4376	3284	82C4.exe	85
PID 3284 wrote to memory of 4376	3284	82C4.exe	85
PID 3284 wrote to memory of 4376	3284	82C4.exe	85
PID 3284 wrote to memory of 656	3284	82C4.exe	86
PID 3284 wrote to memory of 656	3284	82C4.exe	86
PID 3284 wrote to memory of 656	3284	82C4.exe	86
PID 656 wrote to memory of 3336	656	82C4.exe	90
PID 656 wrote to memory of 3336	656	82C4.exe	90
PID 656 wrote to memory of 3336	656	82C4.exe	90
PID 656 wrote to memory of 3336	656	82C4.exe	90
PID 656 wrote to memory of 3336	656	82C4.exe	90
PID 656 wrote to memory of 3336	656	82C4.exe	90
PID 656 wrote to memory of 3336	656	82C4.exe	90
PID 656 wrote to memory of 3336	656	82C4.exe	90
PID 656 wrote to memory of 3336	656	82C4.exe	90
PID 656 wrote to memory of 3336	656	82C4.exe	90

C:\Users\Admin\AppData\Local\Temp\82C4.exe
"C:\Users\Admin\AppData\Local\Temp\82C4.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2352
- C:\Users\Admin\AppData\Local\Temp\82C4.exe
  "C:\Users\Admin\AppData\Local\Temp\82C4.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3284
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\d7872009-ce04-46df-b360-a96321fe1178" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:4376
- - C:\Users\Admin\AppData\Local\Temp\82C4.exe
    "C:\Users\Admin\AppData\Local\Temp\82C4.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:656
  - - C:\Users\Admin\AppData\Local\Temp\82C4.exe
      "C:\Users\Admin\AppData\Local\Temp\82C4.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      PID:3336
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3336 -s 568
        5⤵
        Program crash
        
        PID:2560

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3336 -ip 3336
1⤵
PID:5092

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\d7872009-ce04-46df-b360-a96321fe1178\82C4.exe

Filesize
768KB

MD5
663a7ee6f23102380056645ded592075

SHA1
42f7de8be635ed37f91c289a81e71bc67139adb9

SHA256
2f9c6d06d25dfea43bb52e9b81df3dd3ebdef5d066573494598e77c450937e8f

SHA512
9d4e890505ccda9a0b3cd971598153c1e33be481d10c1133851f621fc4aad148554977b3162d36cb97759fde5603cfebf7876ad39199eee0519ecd3b1f857d09

Download Submit
memory/656-27-0x0000000000400000-0x0000000000532000-memory.dmp

Filesize
1.2MB

Download
memory/656-21-0x0000000000400000-0x0000000000532000-memory.dmp

Filesize
1.2MB

Download
memory/2352-2-0x0000000000870000-0x000000000098B000-memory.dmp

Filesize
1.1MB

Download
memory/2352-1-0x0000000000690000-0x0000000000726000-memory.dmp

Filesize
600KB

Download
memory/3284-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3284-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3284-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3284-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3284-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3336-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3336-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3336-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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