djvu | 43f9435ff751208b02b3e982b6a65b524bd5b5956978b61d3c0a4c0c5ed008c2

General

Target

d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe
Size

815KB
MD5

e77149a738df525f2af09d73c0158662
SHA1

f044840a18c70c1a443b3f13f5a28c13a5f6f9c2
SHA256

d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506
SHA512

46ab52a6d817f0d53009ccf8c7256a3d7755bef1064073c726a689cfa1bf172f1ec6017b2a5e941548b73289e125acb9eb0a33fa787198a83d1d32769a657fdc
SSDEEP

12288:xq/uQD+rddH+kvKDcOfMZ3e9NIlFPJDe2LNZnV9ijsuynzNbOAGWsczLrkm:qDA5CDdQe9WlFPJq22MRlo0rk

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://acacaca.org/test1/get.php

Attributes

extension
.vvew
offline_id
rE5LpDv2ftYRXAo7bC18EpzfRMTHSGjgfyIMfZt1
payload_url
http://rgyui.top/dl/build2.exe

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

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral2/memory/3604-2-0x00000000022E0000-0x00000000023FB000-memory.dmp	family_djvu
behavioral2/memory/4152-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4152-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4152-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4152-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4152-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/404-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/404-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/404-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Djvu family
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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2764	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-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\bcd751cf-6f64-4bf4-a650-476f0c50f2f5\\d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe\" --AutoStart"	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.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
14	api.2ip.ua
15	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3604 set thread context of 4152	3604	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	84
PID 2804 set thread context of 404	2804	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	88

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
3608	404	WerFault.exe	88

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	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4152	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe
4152	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3604 wrote to memory of 4152	3604	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	84
PID 3604 wrote to memory of 4152	3604	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	84
PID 3604 wrote to memory of 4152	3604	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	84
PID 3604 wrote to memory of 4152	3604	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	84
PID 3604 wrote to memory of 4152	3604	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	84
PID 3604 wrote to memory of 4152	3604	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	84
PID 3604 wrote to memory of 4152	3604	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	84
PID 3604 wrote to memory of 4152	3604	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	84
PID 3604 wrote to memory of 4152	3604	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	84
PID 3604 wrote to memory of 4152	3604	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	84
PID 4152 wrote to memory of 2764	4152	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	85
PID 4152 wrote to memory of 2764	4152	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	85
PID 4152 wrote to memory of 2764	4152	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	85
PID 4152 wrote to memory of 2804	4152	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	86
PID 4152 wrote to memory of 2804	4152	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	86
PID 4152 wrote to memory of 2804	4152	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	86
PID 2804 wrote to memory of 404	2804	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	88
PID 2804 wrote to memory of 404	2804	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	88
PID 2804 wrote to memory of 404	2804	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	88
PID 2804 wrote to memory of 404	2804	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	88
PID 2804 wrote to memory of 404	2804	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	88
PID 2804 wrote to memory of 404	2804	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	88
PID 2804 wrote to memory of 404	2804	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	88
PID 2804 wrote to memory of 404	2804	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	88
PID 2804 wrote to memory of 404	2804	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	88
PID 2804 wrote to memory of 404	2804	d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe	88

C:\Users\Admin\AppData\Local\Temp\d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe
"C:\Users\Admin\AppData\Local\Temp\d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3604
- C:\Users\Admin\AppData\Local\Temp\d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe
  "C:\Users\Admin\AppData\Local\Temp\d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.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:4152
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\bcd751cf-6f64-4bf4-a650-476f0c50f2f5" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2764
- - C:\Users\Admin\AppData\Local\Temp\d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe
    "C:\Users\Admin\AppData\Local\Temp\d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2804
  - - C:\Users\Admin\AppData\Local\Temp\d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe
      "C:\Users\Admin\AppData\Local\Temp\d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      PID:404
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 404 -s 584
        5⤵
        Program crash
        
        PID:3608

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 404 -ip 404
1⤵
PID:3088

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\bcd751cf-6f64-4bf4-a650-476f0c50f2f5\d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506.exe

Filesize
815KB

MD5
e77149a738df525f2af09d73c0158662

SHA1
f044840a18c70c1a443b3f13f5a28c13a5f6f9c2

SHA256
d98e338f32b35399becc7cacde575aec780b828bbf88021078be685fb3937506

SHA512
46ab52a6d817f0d53009ccf8c7256a3d7755bef1064073c726a689cfa1bf172f1ec6017b2a5e941548b73289e125acb9eb0a33fa787198a83d1d32769a657fdc

Download Submit
memory/404-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/404-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/404-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2804-18-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/2804-21-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/3604-2-0x00000000022E0000-0x00000000023FB000-memory.dmp

Filesize
1.1MB

Download
memory/3604-1-0x0000000000790000-0x0000000000831000-memory.dmp

Filesize
644KB

Download
memory/4152-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4152-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4152-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4152-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4152-15-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads