Analysis
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max time kernel
145s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
25/01/2024, 18:40
Static task
static1
Behavioral task
behavioral1
Sample
753a72923bbbcde52682c31fcc134124.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
753a72923bbbcde52682c31fcc134124.exe
Resource
win10v2004-20231222-en
General
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Target
753a72923bbbcde52682c31fcc134124.exe
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Size
786KB
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MD5
753a72923bbbcde52682c31fcc134124
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SHA1
7a7a4ef36dc84994c250b32d03d8398c5116e091
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SHA256
25a605a5eb395c355f464bdec7a391985069ce226ce75675e0df281ccb98c7d5
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SHA512
303ae0cc51e7d41321c0f44ebcd0f5d8284cd16e79f3529102628cb99e637cea6a0aa4d2bf17bc8491ef2d62ceb8cd87ae3b2b87a8e6e6fc3bd64e564160075d
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SSDEEP
24576:HFlyvPt1Jo8yszpsy9k6I5q55DUsdBPA:l4vPt1K8yksyeqBI
Malware Config
Extracted
djvu
http://astdg.top/nddddhsspen6/get.php
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extension
.moqs
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offline_id
CatwRkqdYh2Jomn6DqwFoGgcSbDsle1xlE1NPtt1
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payload_url
http://securebiz.org/dl/build2.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 17 IoCs
resource yara_rule behavioral2/memory/1692-2-0x0000000002870000-0x000000000298B000-memory.dmp family_djvu behavioral2/memory/1456-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1456-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1456-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1456-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1456-16-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3084-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3084-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3084-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3084-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3084-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3084-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3084-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3084-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3084-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3084-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3084-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation 753a72923bbbcde52682c31fcc134124.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 2140 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\3eeb72eb-4ef6-401d-be37-2fa23c11e5f3\\753a72923bbbcde52682c31fcc134124.exe\" --AutoStart" 753a72923bbbcde52682c31fcc134124.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 20 api.2ip.ua 13 api.2ip.ua 14 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 1692 set thread context of 1456 1692 753a72923bbbcde52682c31fcc134124.exe 89 PID 4396 set thread context of 3084 4396 753a72923bbbcde52682c31fcc134124.exe 97 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 1456 753a72923bbbcde52682c31fcc134124.exe 1456 753a72923bbbcde52682c31fcc134124.exe 3084 753a72923bbbcde52682c31fcc134124.exe 3084 753a72923bbbcde52682c31fcc134124.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 1692 wrote to memory of 1456 1692 753a72923bbbcde52682c31fcc134124.exe 89 PID 1692 wrote to memory of 1456 1692 753a72923bbbcde52682c31fcc134124.exe 89 PID 1692 wrote to memory of 1456 1692 753a72923bbbcde52682c31fcc134124.exe 89 PID 1692 wrote to memory of 1456 1692 753a72923bbbcde52682c31fcc134124.exe 89 PID 1692 wrote to memory of 1456 1692 753a72923bbbcde52682c31fcc134124.exe 89 PID 1692 wrote to memory of 1456 1692 753a72923bbbcde52682c31fcc134124.exe 89 PID 1692 wrote to memory of 1456 1692 753a72923bbbcde52682c31fcc134124.exe 89 PID 1692 wrote to memory of 1456 1692 753a72923bbbcde52682c31fcc134124.exe 89 PID 1692 wrote to memory of 1456 1692 753a72923bbbcde52682c31fcc134124.exe 89 PID 1692 wrote to memory of 1456 1692 753a72923bbbcde52682c31fcc134124.exe 89 PID 1456 wrote to memory of 2140 1456 753a72923bbbcde52682c31fcc134124.exe 90 PID 1456 wrote to memory of 2140 1456 753a72923bbbcde52682c31fcc134124.exe 90 PID 1456 wrote to memory of 2140 1456 753a72923bbbcde52682c31fcc134124.exe 90 PID 1456 wrote to memory of 4396 1456 753a72923bbbcde52682c31fcc134124.exe 91 PID 1456 wrote to memory of 4396 1456 753a72923bbbcde52682c31fcc134124.exe 91 PID 1456 wrote to memory of 4396 1456 753a72923bbbcde52682c31fcc134124.exe 91 PID 4396 wrote to memory of 3084 4396 753a72923bbbcde52682c31fcc134124.exe 97 PID 4396 wrote to memory of 3084 4396 753a72923bbbcde52682c31fcc134124.exe 97 PID 4396 wrote to memory of 3084 4396 753a72923bbbcde52682c31fcc134124.exe 97 PID 4396 wrote to memory of 3084 4396 753a72923bbbcde52682c31fcc134124.exe 97 PID 4396 wrote to memory of 3084 4396 753a72923bbbcde52682c31fcc134124.exe 97 PID 4396 wrote to memory of 3084 4396 753a72923bbbcde52682c31fcc134124.exe 97 PID 4396 wrote to memory of 3084 4396 753a72923bbbcde52682c31fcc134124.exe 97 PID 4396 wrote to memory of 3084 4396 753a72923bbbcde52682c31fcc134124.exe 97 PID 4396 wrote to memory of 3084 4396 753a72923bbbcde52682c31fcc134124.exe 97 PID 4396 wrote to memory of 3084 4396 753a72923bbbcde52682c31fcc134124.exe 97
Processes
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C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe"C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1692 -
C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe"C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1456 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\3eeb72eb-4ef6-401d-be37-2fa23c11e5f3" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2140
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C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe"C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4396 -
C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe"C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:3084
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize1KB
MD5d00cc6d25614c515b6e2d64d90033d15
SHA1449ca823652db2a579cbd6b06284ff061147f6ba
SHA256ab0d18e7b28375f2cc703c9b7c899fb9ea9429783709f358a47e42fe850ed53d
SHA51280e6454003cd85122a068c3353defe50ddb97ece70204ebd7c7172093df1ac506e4f023e4b991b4673407ed619d4932439675ba6893d0436ecc927d54f3c9f96
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize724B
MD58202a1cd02e7d69597995cabbe881a12
SHA18858d9d934b7aa9330ee73de6c476acf19929ff6
SHA25658f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
SHA51297ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize410B
MD5b4858a4e5a63d4cc158301a046ae6ac4
SHA167f0702174f735ba1f1824b2fdb1ef90ed206214
SHA256b8c5a9874077bebfc06782732fe60e97361927f8af5dfe382ec5cadb317e56dc
SHA5124aea7e631e6a9e472c16aa51d5a820643c8405c9da63b99a9f0bc0f7399783a3ab24bab6f2320c0c11cbd849bf02ba9ecb5f6c78f596fd37459e6947c7f1dadf
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5b1c5fc3fe0be24b5046d8d4af405c374
SHA191a1429dd737fb54ce556a9f52cb6a8734c3927a
SHA256c9976375152f4323a40e336778955481389a5c309f3e88e04318adbc34630b23
SHA51218835220d917f8773db7ea3063beb09d073d53bcc45319120acc57f79aeb3dd30089b4e929ed4c7c1d8138dd2f61597c6d161e9de8952a22480372cb81d92017
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C:\Users\Admin\AppData\Local\3eeb72eb-4ef6-401d-be37-2fa23c11e5f3\753a72923bbbcde52682c31fcc134124.exe
Filesize786KB
MD5753a72923bbbcde52682c31fcc134124
SHA17a7a4ef36dc84994c250b32d03d8398c5116e091
SHA25625a605a5eb395c355f464bdec7a391985069ce226ce75675e0df281ccb98c7d5
SHA512303ae0cc51e7d41321c0f44ebcd0f5d8284cd16e79f3529102628cb99e637cea6a0aa4d2bf17bc8491ef2d62ceb8cd87ae3b2b87a8e6e6fc3bd64e564160075d