djvu | 8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6

General

Target

b35348f4654893767a081b076f7becdf.exe
Size

779KB
MD5

b35348f4654893767a081b076f7becdf
SHA1

05b4ff88303a5e72ff43d5554c4628cec9e71bf8
SHA256

8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6
SHA512

b634797706b5851ade5983aeac47f63723545e2d2c09f171871728a278f7cb72ab52d4eca73ff6648d6224a7c4da2ec261b4c6104fa2ab532334ddd5551b8e67
SSDEEP

12288:JHdymkH6+JdxrhhdF3wHogECWip4QBeXYeNaCA57tQL9ODxvZTTN85vaYkqC:JdkaCfrhhP3wi7rXYeNbaekDxRfO5zC

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test1/get.php

Attributes

extension
.bgjs
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
payload_url
http://sdfjhuz.com/dl/build2.exe
http://cajgtus.com/files/1/build3.exe
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2200-4-0x0000000005A00000-0x0000000005B1B000-memory.dmp	family_djvu
behavioral1/memory/2432-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2432-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2432-9-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2432-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2376-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2376-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2376-50-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2376-49-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2376-51-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2376-54-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2376-57-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2376-56-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2376-58-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

2084 icacls.exe

pid	process
2084	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

b35348f4654893767a081b076f7becdf.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\4b43a492-41f4-4af5-9d42-2c4b5affd25b\\b35348f4654893767a081b076f7becdf.exe\" --AutoStart"	b35348f4654893767a081b076f7becdf.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.

Processes:

flow ioc

3 api.2ip.ua
4 api.2ip.ua
9 api.2ip.ua

flow	ioc
3	api.2ip.ua
4	api.2ip.ua
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

b35348f4654893767a081b076f7becdf.exeb35348f4654893767a081b076f7becdf.exe

description	pid	process	target process
PID 2200 set thread context of 2432	2200	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2600 set thread context of 2376	2600	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe

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

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

b35348f4654893767a081b076f7becdf.exeb35348f4654893767a081b076f7becdf.exe

pid process

2432 b35348f4654893767a081b076f7becdf.exe
2376 b35348f4654893767a081b076f7becdf.exe
2376 b35348f4654893767a081b076f7becdf.exe

pid	process
2432	b35348f4654893767a081b076f7becdf.exe
2376	b35348f4654893767a081b076f7becdf.exe
2376	b35348f4654893767a081b076f7becdf.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

b35348f4654893767a081b076f7becdf.exeb35348f4654893767a081b076f7becdf.exeb35348f4654893767a081b076f7becdf.exe

C:\Users\Admin\AppData\Local\Temp\b35348f4654893767a081b076f7becdf.exe
"C:\Users\Admin\AppData\Local\Temp\b35348f4654893767a081b076f7becdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2200

C:\Users\Admin\AppData\Local\Temp\b35348f4654893767a081b076f7becdf.exe
"C:\Users\Admin\AppData\Local\Temp\b35348f4654893767a081b076f7becdf.exe"
2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2432

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\4b43a492-41f4-4af5-9d42-2c4b5affd25b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:2084

C:\Users\Admin\AppData\Local\Temp\b35348f4654893767a081b076f7becdf.exe
"C:\Users\Admin\AppData\Local\Temp\b35348f4654893767a081b076f7becdf.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2600

C:\Users\Admin\AppData\Local\Temp\b35348f4654893767a081b076f7becdf.exe
"C:\Users\Admin\AppData\Local\Temp\b35348f4654893767a081b076f7becdf.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2376

Network

MITRE ATT&CK Matrix ATT&CK v13

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

1

T1222

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize
1KB

MD5
64f1ee0302fd3757c5d51637eb7bcb32

SHA1
cec51eef8866e2e40618d3006b04a2a57f3d988c

SHA256
0183623c960efa8b38cd681598e3e4f2ce442584b8e96d0ed99b066bb30b10d7

SHA512
23e5ba581a61d6df26c7307b95855d6cb7043d13b6ad57280b5cf85aa077da12ddb4b8fc2ba2be2064640892aa0c388c6605329cb63ed24d60ecb436a37dde54

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize
724B

MD5
8202a1cd02e7d69597995cabbe881a12

SHA1
8858d9d934b7aa9330ee73de6c476acf19929ff6

SHA256
58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

SHA512
97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize
410B

MD5
8423b415a8737492bf395e20489ebcf2

SHA1
fcfb5c5e4c069d6d9a15b21ffe1e28824b9d550a

SHA256
99442ee545d45f215553072b1bb6e29980fc2c6d4ca4667ce12c55fbc159e03f

SHA512
0d57c143ccacfd32ecfc5ecc35f0e33776bcdab18bb4af5ff51acb20dff4f3ad06c74814039ddd52c362758f95f8668cfcae429e15ec5e5cc8b4984dc7d7093c

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize
344B

MD5
cedf1479d391c6a2cd33d52e0fc96d8f

SHA1
d87f4ec924eeb9d208e43f630e10e5fe4bd19ff8

SHA256
580e4f8e68c1d08747d97bb9d65f2988050eb2722eb252f1a83b36dad5c23376

SHA512
e189fd138e27833c8a88caf984fa1b71be2f661375acc409fe556d02855d016f990b2f3d23e47b9a37714a0d20f240ef28e94f65afb65785ac8cd6f81c6c719b

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize
392B

MD5
3dc69bfd7eb2dc2e2030e460ee8b23f9

SHA1
e80589d3752469a57dd9096cfc3f79b575d36589

SHA256
5c91eb89659e13c091a0e59b4b458a8676d2eb33938524356d30dae781177707

SHA512
934eafd05b8d9041bae504a0b8794c635818f9c686ae070c9c4d7577627a31dca324803ff3de900bda3fad18a5bf242028d14f92fcd34d461173099bf4128537

Download Submit
C:\Users\Admin\AppData\Local\4b43a492-41f4-4af5-9d42-2c4b5affd25b\b35348f4654893767a081b076f7becdf.exe
Filesize
779KB

MD5
b35348f4654893767a081b076f7becdf

SHA1
05b4ff88303a5e72ff43d5554c4628cec9e71bf8

SHA256
8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6

SHA512
b634797706b5851ade5983aeac47f63723545e2d2c09f171871728a278f7cb72ab52d4eca73ff6648d6224a7c4da2ec261b4c6104fa2ab532334ddd5551b8e67

Download Submit
C:\Users\Admin\AppData\Local\Temp\CabAB0E.tmp
Filesize
65KB

MD5
ac05d27423a85adc1622c714f2cb6184

SHA1
b0fe2b1abddb97837ea0195be70ab2ff14d43198

SHA256
c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

SHA512
6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

Download Submit
memory/2200-0-0x0000000000310000-0x00000000003A1000-memory.dmp

Filesize
580KB

Download
memory/2200-1-0x0000000000310000-0x00000000003A1000-memory.dmp

Filesize
580KB

Download
memory/2200-4-0x0000000005A00000-0x0000000005B1B000-memory.dmp

Filesize
1.1MB

Download
memory/2200-7-0x0000000000310000-0x00000000003A1000-memory.dmp

Filesize
580KB

Download
memory/2376-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2376-50-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2376-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2376-58-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2376-56-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2376-57-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2376-54-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2376-51-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2376-49-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2432-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2432-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2432-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2432-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2432-9-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2600-30-0x0000000000340000-0x00000000003D1000-memory.dmp

Filesize
580KB

Download
memory/2600-28-0x0000000000340000-0x00000000003D1000-memory.dmp

Filesize
580KB

Download

description	pid	process	target process
PID 2200 wrote to memory of 2432	2200	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2200 wrote to memory of 2432	2200	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2200 wrote to memory of 2432	2200	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2200 wrote to memory of 2432	2200	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2200 wrote to memory of 2432	2200	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2200 wrote to memory of 2432	2200	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2200 wrote to memory of 2432	2200	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2200 wrote to memory of 2432	2200	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2200 wrote to memory of 2432	2200	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2200 wrote to memory of 2432	2200	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2200 wrote to memory of 2432	2200	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2432 wrote to memory of 2084	2432	b35348f4654893767a081b076f7becdf.exe	icacls.exe
PID 2432 wrote to memory of 2084	2432	b35348f4654893767a081b076f7becdf.exe	icacls.exe
PID 2432 wrote to memory of 2084	2432	b35348f4654893767a081b076f7becdf.exe	icacls.exe
PID 2432 wrote to memory of 2084	2432	b35348f4654893767a081b076f7becdf.exe	icacls.exe
PID 2432 wrote to memory of 2600	2432	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2432 wrote to memory of 2600	2432	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2432 wrote to memory of 2600	2432	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2432 wrote to memory of 2600	2432	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2600 wrote to memory of 2376	2600	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2600 wrote to memory of 2376	2600	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2600 wrote to memory of 2376	2600	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2600 wrote to memory of 2376	2600	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2600 wrote to memory of 2376	2600	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2600 wrote to memory of 2376	2600	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2600 wrote to memory of 2376	2600	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2600 wrote to memory of 2376	2600	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2600 wrote to memory of 2376	2600	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2600 wrote to memory of 2376	2600	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe
PID 2600 wrote to memory of 2376	2600	b35348f4654893767a081b076f7becdf.exe	b35348f4654893767a081b076f7becdf.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads