djvu | 4db18bb82c0143d95eea29fb1416348936007290889eb5ab1f5332d09db43bdb

General

Target

d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe
Size

732KB
MD5

cdc4132b29e414f192431cf17c959a56
SHA1

a26f541c8130c404020d76d98b4fb4c3c9600f99
SHA256

d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701
SHA512

d85935b75ce1a78b026ccc2e015c1cf1e3013114a8ba0f2e48c2bc4d93cdbd913f18016214335c5111c491716f7a823e58366fb4a37778d32be78478ed128eef
SSDEEP

12288:HLtTB27VeNWombj8dJBpuz4I3hrJAb8hWzmYe9VOucjSdsdfyv:rtUJ6W7WEcENAbbqmSdsNyv

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
behavioral2/memory/3384-2-0x0000000003DC0000-0x0000000003EDB000-memory.dmp	family_djvu
behavioral2/memory/3076-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3076-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3076-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3076-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3076-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2840-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2840-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2840-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2840-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2840-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2840-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2840-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2840-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2840-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2840-40-0x0000000000400000-0x0000000000537000-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-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3568	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-1-5-21-656926755-4116854191-210765258-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\175b14df-060f-4de2-b9d7-7a3c229e3ad0\\d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe\" --AutoStart"	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.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
12	api.2ip.ua
16	api.2ip.ua
21	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3384 set thread context of 3076	3384	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	85
PID 1548 set thread context of 2840	1548	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	93

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

System Information Discovery
T1082

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	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3076	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe
3076	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe
2840	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe
2840	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3384 wrote to memory of 3076	3384	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	85
PID 3384 wrote to memory of 3076	3384	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	85
PID 3384 wrote to memory of 3076	3384	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	85
PID 3384 wrote to memory of 3076	3384	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	85
PID 3384 wrote to memory of 3076	3384	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	85
PID 3384 wrote to memory of 3076	3384	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	85
PID 3384 wrote to memory of 3076	3384	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	85
PID 3384 wrote to memory of 3076	3384	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	85
PID 3384 wrote to memory of 3076	3384	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	85
PID 3384 wrote to memory of 3076	3384	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	85
PID 3076 wrote to memory of 3568	3076	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	88
PID 3076 wrote to memory of 3568	3076	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	88
PID 3076 wrote to memory of 3568	3076	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	88
PID 3076 wrote to memory of 1548	3076	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	89
PID 3076 wrote to memory of 1548	3076	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	89
PID 3076 wrote to memory of 1548	3076	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	89
PID 1548 wrote to memory of 2840	1548	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	93
PID 1548 wrote to memory of 2840	1548	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	93
PID 1548 wrote to memory of 2840	1548	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	93
PID 1548 wrote to memory of 2840	1548	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	93
PID 1548 wrote to memory of 2840	1548	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	93
PID 1548 wrote to memory of 2840	1548	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	93
PID 1548 wrote to memory of 2840	1548	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	93
PID 1548 wrote to memory of 2840	1548	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	93
PID 1548 wrote to memory of 2840	1548	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	93
PID 1548 wrote to memory of 2840	1548	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	93

C:\Users\Admin\AppData\Local\Temp\d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe
"C:\Users\Admin\AppData\Local\Temp\d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3384
- C:\Users\Admin\AppData\Local\Temp\d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe
  "C:\Users\Admin\AppData\Local\Temp\d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.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:3076
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\175b14df-060f-4de2-b9d7-7a3c229e3ad0" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:3568
- - C:\Users\Admin\AppData\Local\Temp\d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe
    "C:\Users\Admin\AppData\Local\Temp\d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1548
  - - C:\Users\Admin\AppData\Local\Temp\d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe
      "C:\Users\Admin\AppData\Local\Temp\d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:2840

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\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
971c514f84bba0785f80aa1c23edfd79

SHA1
732acea710a87530c6b08ecdf32a110d254a54c8

SHA256
f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895

SHA512
43dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58

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

Filesize
174B

MD5
a9bcec87bc7daaffff9ab0d5a362b67e

SHA1
15a8c9b2f9c3ae4b6c5eee46608d7a2f0499efbe

SHA256
730004a6ed6a530f451a130bdac5e5a2494a258bfd72bcabf2865aeace0610b1

SHA512
d0ac5083d3b3c2132611463cf6df2c4dcfd33befdba3b76dd650eb78d525dbaca7defb088d1f44bc24abaec0339ea104903ca38e3732b94f307c5c0cd6b64ee0

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

Filesize
170B

MD5
9e3fb4b34605c451c75b51667c3e26ae

SHA1
02bd4885869bf71cbe401ecb272eb5ee49a422de

SHA256
29937e8283ed8a2a80092f225d09ace50789eeb7605dbdf29e33cce4c5d47e6b

SHA512
91a99439e3d237eb78d2c65c6033d60b34a06f28b68da63ede094bdc0fa4066def57b16549de9efc73874b699c0e2e99e80e6f594ea99ed0c93f7b838feabe89

Download Submit
C:\Users\Admin\AppData\Local\175b14df-060f-4de2-b9d7-7a3c229e3ad0\d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe

Filesize
732KB

MD5
cdc4132b29e414f192431cf17c959a56

SHA1
a26f541c8130c404020d76d98b4fb4c3c9600f99

SHA256
d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701

SHA512
d85935b75ce1a78b026ccc2e015c1cf1e3013114a8ba0f2e48c2bc4d93cdbd913f18016214335c5111c491716f7a823e58366fb4a37778d32be78478ed128eef

Download Submit
memory/1548-23-0x0000000000400000-0x00000000020FF000-memory.dmp

Filesize
29.0MB

Download
memory/1548-38-0x0000000000400000-0x00000000020FF000-memory.dmp

Filesize
29.0MB

Download
memory/2840-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2840-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2840-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2840-40-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2840-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2840-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2840-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2840-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2840-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2840-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3076-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3076-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3076-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3076-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3076-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3384-2-0x0000000003DC0000-0x0000000003EDB000-memory.dmp

Filesize
1.1MB

Download
memory/3384-1-0x0000000002360000-0x0000000002400000-memory.dmp

Filesize
640KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads