Analysis
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max time kernel
125s -
max time network
156s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
16/04/2024, 00:10
Static task
static1
Behavioral task
behavioral1
Sample
df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe
Resource
win10v2004-20240412-en
Behavioral task
behavioral2
Sample
df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe
Resource
win11-20240412-en
General
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Target
df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe
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Size
851KB
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MD5
23e17bc0ed5de8c26fc0d371d64c3b2c
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SHA1
a1f40ed9e90a8d55e3a5167b20191291de65b7f5
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SHA256
df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6
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SHA512
018d9cfc145b98ff75d4cbc050733448bef77a0d3bbcbe94c3092fb9f5d1369ba8b4c3889cd6aae25a78adcb58ae131a53a695ede1c3cd2bf0593fe31f56e19b
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SSDEEP
12288:gAjaxsJPuYbIw0JGZUqqLXHHsmfw+fflslYuDZNVKlc:bjaLOILJGfqL3OWflsldDTsi
Malware Config
Extracted
djvu
http://sajdfue.com/test1/get.php
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extension
.uajs
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offline_id
Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1
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payload_url
http://sdfjhuz.com/dl/build2.exe
http://sajdfue.com/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 10 IoCs
resource yara_rule behavioral1/memory/1100-2-0x0000000004A60000-0x0000000004B7B000-memory.dmp family_djvu behavioral1/memory/2344-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2344-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2344-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2344-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2344-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2180-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1128-20-0x00000000049E0000-0x0000000004A81000-memory.dmp family_djvu behavioral1/memory/2180-23-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2180-25-0x0000000000400000-0x0000000000537000-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-1-5-21-1230272463-3683322193-511842230-1000\Control Panel\International\Geo\Nation df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 3208 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1230272463-3683322193-511842230-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\0a6b61a0-57a1-4dba-941f-deae0a9567e8\\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe\" --AutoStart" df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.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 10 api.2ip.ua 12 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 1100 set thread context of 2344 1100 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 93 PID 1128 set thread context of 2180 1128 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 99 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Program crash 1 IoCs
pid pid_target Process procid_target 3244 2180 WerFault.exe 99 -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 2344 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 2344 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 1100 wrote to memory of 2344 1100 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 93 PID 1100 wrote to memory of 2344 1100 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 93 PID 1100 wrote to memory of 2344 1100 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 93 PID 1100 wrote to memory of 2344 1100 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 93 PID 1100 wrote to memory of 2344 1100 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 93 PID 1100 wrote to memory of 2344 1100 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 93 PID 1100 wrote to memory of 2344 1100 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 93 PID 1100 wrote to memory of 2344 1100 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 93 PID 1100 wrote to memory of 2344 1100 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 93 PID 1100 wrote to memory of 2344 1100 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 93 PID 2344 wrote to memory of 3208 2344 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 94 PID 2344 wrote to memory of 3208 2344 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 94 PID 2344 wrote to memory of 3208 2344 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 94 PID 2344 wrote to memory of 1128 2344 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 97 PID 2344 wrote to memory of 1128 2344 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 97 PID 2344 wrote to memory of 1128 2344 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 97 PID 1128 wrote to memory of 2180 1128 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 99 PID 1128 wrote to memory of 2180 1128 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 99 PID 1128 wrote to memory of 2180 1128 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 99 PID 1128 wrote to memory of 2180 1128 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 99 PID 1128 wrote to memory of 2180 1128 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 99 PID 1128 wrote to memory of 2180 1128 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 99 PID 1128 wrote to memory of 2180 1128 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 99 PID 1128 wrote to memory of 2180 1128 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 99 PID 1128 wrote to memory of 2180 1128 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 99 PID 1128 wrote to memory of 2180 1128 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 99
Processes
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C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe"C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1100 -
C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe"C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2344 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\0a6b61a0-57a1-4dba-941f-deae0a9567e8" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:3208
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C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe"C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1128 -
C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe"C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe" --Admin IsNotAutoStart IsNotTask4⤵PID:2180
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2180 -s 5685⤵
- Program crash
PID:3244
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=3688,i,14910875736531803530,4367035887674785793,262144 --variations-seed-version --mojo-platform-channel-handle=4376 /prefetch:81⤵PID:2380
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 2180 -ip 21801⤵PID:4240
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\0a6b61a0-57a1-4dba-941f-deae0a9567e8\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe
Filesize851KB
MD523e17bc0ed5de8c26fc0d371d64c3b2c
SHA1a1f40ed9e90a8d55e3a5167b20191291de65b7f5
SHA256df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6
SHA512018d9cfc145b98ff75d4cbc050733448bef77a0d3bbcbe94c3092fb9f5d1369ba8b4c3889cd6aae25a78adcb58ae131a53a695ede1c3cd2bf0593fe31f56e19b