djvu | c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9

General

Target

c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe
Size

768KB
MD5

bf38f7a1539e20039ffdadee72bcef0e
SHA1

7225b33c709f7dbe92f13d53aed54ce969649828
SHA256

c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9
SHA512

6f0b45a57b2062b2666104456250604339968676341e4f92b44697fb9acdbb033c26c9338731ebdf9dc0e13e2c3dc9ce682935839b671d38638a5a45d8ba2148
SSDEEP

12288:B0F+ljfLb3SuBhEAJITrM2EjW6aqBRfyrhfjWL00TIO40t7ZuXb8a+3MVBt99fKR:xjj77ZCXM2lrhfyg0TQnAyBtbiR

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.eewt
offline_id
5IVlpkccZlJz0AZ5atgGWVKe9CGAnXjohDf40mt1
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 6 IoCs

resource	yara_rule
behavioral1/memory/4960-133-0x00000000009D0000-0x0000000000AEB000-memory.dmp	family_djvu
behavioral1/memory/4976-135-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4976-136-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4976-137-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4976-138-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4976-142-0x0000000000400000-0x0000000000537000-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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4552	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-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e41963e4-09bd-498e-add2-a684d1976eae\\c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe\" --AutoStart"	c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.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
59	api.2ip.ua
60	api.2ip.ua

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4960 set thread context of 4976	4960	c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe	108

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
4976	c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe
4976	c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4960 wrote to memory of 4976	4960	c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe	108
PID 4960 wrote to memory of 4976	4960	c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe	108
PID 4960 wrote to memory of 4976	4960	c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe	108
PID 4960 wrote to memory of 4976	4960	c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe	108
PID 4960 wrote to memory of 4976	4960	c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe	108
PID 4960 wrote to memory of 4976	4960	c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe	108
PID 4960 wrote to memory of 4976	4960	c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe	108
PID 4960 wrote to memory of 4976	4960	c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe	108
PID 4960 wrote to memory of 4976	4960	c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe	108
PID 4960 wrote to memory of 4976	4960	c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe	108
PID 4976 wrote to memory of 4552	4976	c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe	109
PID 4976 wrote to memory of 4552	4976	c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe	109
PID 4976 wrote to memory of 4552	4976	c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe	109
PID 4976 wrote to memory of 4420	4976	c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe	110
PID 4976 wrote to memory of 4420	4976	c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe	110
PID 4976 wrote to memory of 4420	4976	c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe	110

C:\Users\Admin\AppData\Local\Temp\c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe
"C:\Users\Admin\AppData\Local\Temp\c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4960
- C:\Users\Admin\AppData\Local\Temp\c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe
  "C:\Users\Admin\AppData\Local\Temp\c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4976
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\e41963e4-09bd-498e-add2-a684d1976eae" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4552
- - C:\Users\Admin\AppData\Local\Temp\c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe
    "C:\Users\Admin\AppData\Local\Temp\c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    PID:4420

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\e41963e4-09bd-498e-add2-a684d1976eae\c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9.exe

Filesize
768KB

MD5
bf38f7a1539e20039ffdadee72bcef0e

SHA1
7225b33c709f7dbe92f13d53aed54ce969649828

SHA256
c2c5551a341048c9ce4a676e70aace321d330011ad00fea3e620ab6f6fda04c9

SHA512
6f0b45a57b2062b2666104456250604339968676341e4f92b44697fb9acdbb033c26c9338731ebdf9dc0e13e2c3dc9ce682935839b671d38638a5a45d8ba2148

Download Submit
memory/4960-132-0x00000000007B4000-0x0000000000845000-memory.dmp

Filesize
580KB

Download
memory/4960-133-0x00000000009D0000-0x0000000000AEB000-memory.dmp

Filesize
1.1MB

Download
memory/4976-135-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4976-136-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4976-137-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4976-138-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4976-142-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

Analysis

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