djvu | 483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923

General

Target

483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe
Size

732KB
MD5

9898c5fd1f3e730df1eecd3c12eee219
SHA1

2505d184baa2c70708cbcb43df0275b2ad0116ff
SHA256

483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923
SHA512

d2b401f776fa97ab0e488af322e185509eb44e143545a45c9523936f45712a8f4b6e4e788cdfb33f6457c311085fa976f339508fe864ddf549656df29bfb6c55
SSDEEP

12288:DQihw2bt+YTYV06qFGqAE6Dv7VcIboDesKZ6gjoAn0sUH9xy0kPsfxXBuV9m4sF:Ei9r1Lca4joA0s49xEPKI9mtF

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/lancer/get.php

Attributes

extension
.qual
offline_id
KLbRmn6on3AXGFgDLGtd0IkHmV7uHw9VxlcxO5t1
payload_url
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 16 IoCs

resource	yara_rule
behavioral1/memory/100-2-0x0000000004030000-0x000000000414B000-memory.dmp	family_djvu
behavioral1/memory/1816-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1816-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1816-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1816-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1816-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/212-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/212-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/212-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/212-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/212-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/212-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/212-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/212-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/212-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3696-39-0x0000000000400000-0x00000000020FF000-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-1-5-21-384068567-2943195810-3631207890-1000\Control Panel\International\Geo\Nation	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
5084	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-1-5-21-384068567-2943195810-3631207890-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\46fab01e-d3fc-4d82-90d2-4798b7923d25\\483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe\" --AutoStart"	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe

Looks up external IP address via web service 3 IoCs

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

flow	ioc
22	api.2ip.ua
23	api.2ip.ua
29	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 100 set thread context of 1816	100	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	87
PID 3696 set thread context of 212	3696	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	95

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1816	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe
1816	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe
212	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe
212	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 100 wrote to memory of 1816	100	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	87
PID 100 wrote to memory of 1816	100	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	87
PID 100 wrote to memory of 1816	100	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	87
PID 100 wrote to memory of 1816	100	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	87
PID 100 wrote to memory of 1816	100	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	87
PID 100 wrote to memory of 1816	100	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	87
PID 100 wrote to memory of 1816	100	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	87
PID 100 wrote to memory of 1816	100	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	87
PID 100 wrote to memory of 1816	100	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	87
PID 100 wrote to memory of 1816	100	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	87
PID 1816 wrote to memory of 5084	1816	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	90
PID 1816 wrote to memory of 5084	1816	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	90
PID 1816 wrote to memory of 5084	1816	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	90
PID 1816 wrote to memory of 3696	1816	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	91
PID 1816 wrote to memory of 3696	1816	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	91
PID 1816 wrote to memory of 3696	1816	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	91
PID 3696 wrote to memory of 212	3696	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	95
PID 3696 wrote to memory of 212	3696	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	95
PID 3696 wrote to memory of 212	3696	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	95
PID 3696 wrote to memory of 212	3696	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	95
PID 3696 wrote to memory of 212	3696	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	95
PID 3696 wrote to memory of 212	3696	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	95
PID 3696 wrote to memory of 212	3696	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	95
PID 3696 wrote to memory of 212	3696	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	95
PID 3696 wrote to memory of 212	3696	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	95
PID 3696 wrote to memory of 212	3696	483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe	95

C:\Users\Admin\AppData\Local\Temp\483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe
"C:\Users\Admin\AppData\Local\Temp\483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:100
- C:\Users\Admin\AppData\Local\Temp\483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe
  "C:\Users\Admin\AppData\Local\Temp\483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1816
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\46fab01e-d3fc-4d82-90d2-4798b7923d25" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:5084
- - C:\Users\Admin\AppData\Local\Temp\483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe
    "C:\Users\Admin\AppData\Local\Temp\483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3696
  - - C:\Users\Admin\AppData\Local\Temp\483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe
      "C:\Users\Admin\AppData\Local\Temp\483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:212

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\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
1KB

MD5
7fb5fa1534dcf77f2125b2403b30a0ee

SHA1
365d96812a69ac0a4611ea4b70a3f306576cc3ea

SHA256
33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f

SHA512
a9279fd60505a1bfeef6fb07834cad0fd5be02fd405573fc1a5f59b991e9f88f5e81c32fe910f69bdc6585e71f02559895149eaf49c25b8ff955459fd60c0d2e

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8

Filesize
436B

MD5
1bfe0a81db078ea084ff82fe545176fe

SHA1
50b116f578bd272922fa8eae94f7b02fd3b88384

SHA256
5ba8817f13eee00e75158bad93076ab474a068c6b52686579e0f728fda68499f

SHA512
37c582f3f09f8d80529608c09041295d1644bcc9de6fb8c4669b05339b0dd870f9525abc5eed53ad06a94b51441275504bc943c336c5beb63b53460ba836ca8d

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
174B

MD5
8d51fb60f3cb60ad15af3aed2b1eb39f

SHA1
414eb33675085d8d9af28c55d5554f6f4c0b5549

SHA256
7ddfa63c7d2710f108806e219a6cd00db2025177a177f591425be642229fbd54

SHA512
4d42de19ca533667d2be8680e87e9dfb38eb43cecb2c26cc23bb42dadac2001db7e04a6f5b6c4e0c5cbf926056d57cd350d0109612e2635bb8522989d33c9dde

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8

Filesize
170B

MD5
2e1126839080809d16f1930abfcc2c1f

SHA1
7fb000590a941132f501fa95d91d392e01f85f8b

SHA256
6aa9ddee4bebc68dcc1fefadadff307cd762e2fd347abb609404ecba8e7fcc7d

SHA512
282038ca0b12c8397b8844fe357efc9154639e8c0f5d4b93d3f47d49735202f63b4fe0a71a68ed95da10da08e8e40e3a29a6cb86829c6e97b452aed62d748d3a

Download Submit
C:\Users\Admin\AppData\Local\46fab01e-d3fc-4d82-90d2-4798b7923d25\483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923.exe

Filesize
732KB

MD5
9898c5fd1f3e730df1eecd3c12eee219

SHA1
2505d184baa2c70708cbcb43df0275b2ad0116ff

SHA256
483ccf8762a7ab5008fc5a878be09c10da5c8da72a8e2323c0e31509f95b7923

SHA512
d2b401f776fa97ab0e488af322e185509eb44e143545a45c9523936f45712a8f4b6e4e788cdfb33f6457c311085fa976f339508fe864ddf549656df29bfb6c55

Download Submit
memory/100-1-0x0000000003E90000-0x0000000003F2F000-memory.dmp

Filesize
636KB

Download
memory/100-2-0x0000000004030000-0x000000000414B000-memory.dmp

Filesize
1.1MB

Download
memory/212-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/212-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/212-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/212-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/212-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/212-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/212-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/212-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/212-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1816-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1816-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1816-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1816-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1816-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3696-21-0x0000000000400000-0x00000000020FF000-memory.dmp

Filesize
29.0MB

Download
memory/3696-39-0x0000000000400000-0x00000000020FF000-memory.dmp

Filesize
29.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads