Resubmissions
08/10/2023, 20:25
231008-y69l1sfh3s 10Analysis
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max time kernel
147s -
max time network
147s -
platform
windows10-2004_x64 -
resource
win10v2004-20230915-en -
resource tags
arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system -
submitted
08/10/2023, 20:25
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20230831-en
Behavioral task
behavioral2
Sample
file.exe
Resource
win10v2004-20230915-en
General
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Target
file.exe
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Size
786KB
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MD5
f49c53a4db7c7a6e0ef1e9243cde5ea5
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SHA1
86e2388514f7f4c2a7acd09c03325b0ed690ef83
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SHA256
cd1e5d43202f27d75d48c1d6963ef572eb3321e1ca3d6510c6a999598db09a07
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SHA512
8bd94a77fcbccbd25d6dcdbad6cf1aefc5e5cefdf3f73f4f7bda2d68147e0a87a877968067528c2bb3cfb95c3ffd668620547fb87a8691ed534bfc24a74b0226
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SSDEEP
12288:TOZ8mfnnY5jT3ncoNw7JePBRZ20CohvlPMWaRUyunKH6bkhT0J:4pY5jwo0JGBRZlNNGtuKHEwT0
Malware Config
Extracted
djvu
http://zexeq.com/test2/get.php
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extension
.mlza
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offline_id
FjtJkuhRHnUARRt9GnbbgUTa6ErhJq4ZM668xSt1
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payload_url
http://colisumy.com/dl/build2.exe
http://zexeq.com/files/1/build3.exe
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ransomnote
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Extracted
vidar
5.9
b4fc4cd2d76417bf461814b9d989fcdb
https://steamcommunity.com/profiles/76561199557479327
https://t.me/grizmons
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profile_id_v2
b4fc4cd2d76417bf461814b9d989fcdb
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user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36 OPR/104.0.0.0
Signatures
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Detected Djvu ransomware 16 IoCs
resource yara_rule behavioral2/memory/2692-2-0x00000000041D0000-0x00000000042EB000-memory.dmp family_djvu behavioral2/memory/3284-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3284-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3284-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3284-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3284-15-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3780-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3780-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3780-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3780-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3780-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3780-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3780-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3780-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3780-56-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3780-122-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Downloads MZ/PE file
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Checks computer location settings 2 TTPs 3 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-919254492-3979293997-764407192-1000\Control Panel\International\Geo\Nation file.exe Key value queried \REGISTRY\USER\S-1-5-21-919254492-3979293997-764407192-1000\Control Panel\International\Geo\Nation file.exe Key value queried \REGISTRY\USER\S-1-5-21-919254492-3979293997-764407192-1000\Control Panel\International\Geo\Nation build2.exe -
Executes dropped EXE 4 IoCs
pid Process 2044 build2.exe 4556 build3.exe 1408 build2.exe 2980 mstsca.exe -
Loads dropped DLL 2 IoCs
pid Process 1408 build2.exe 1408 build2.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 2328 icacls.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-919254492-3979293997-764407192-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\5487c5a0-c78c-4e24-88f6-b370055cbc36\\file.exe\" --AutoStart" file.exe -
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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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 29 api.2ip.ua 30 api.2ip.ua 46 api.2ip.ua -
Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 2692 set thread context of 3284 2692 file.exe 86 PID 3564 set thread context of 3780 3564 file.exe 94 PID 2044 set thread context of 1408 2044 build2.exe 102 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 build2.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString build2.exe -
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 4256 schtasks.exe 3352 schtasks.exe -
Delays execution with timeout.exe 1 IoCs
pid Process 4424 timeout.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 3284 file.exe 3284 file.exe 3780 file.exe 3780 file.exe 1408 build2.exe 1408 build2.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeManageVolumePrivilege 1540 svchost.exe -
Suspicious use of WriteProcessMemory 53 IoCs
description pid Process procid_target PID 2692 wrote to memory of 3284 2692 file.exe 86 PID 2692 wrote to memory of 3284 2692 file.exe 86 PID 2692 wrote to memory of 3284 2692 file.exe 86 PID 2692 wrote to memory of 3284 2692 file.exe 86 PID 2692 wrote to memory of 3284 2692 file.exe 86 PID 2692 wrote to memory of 3284 2692 file.exe 86 PID 2692 wrote to memory of 3284 2692 file.exe 86 PID 2692 wrote to memory of 3284 2692 file.exe 86 PID 2692 wrote to memory of 3284 2692 file.exe 86 PID 2692 wrote to memory of 3284 2692 file.exe 86 PID 3284 wrote to memory of 2328 3284 file.exe 89 PID 3284 wrote to memory of 2328 3284 file.exe 89 PID 3284 wrote to memory of 2328 3284 file.exe 89 PID 3284 wrote to memory of 3564 3284 file.exe 91 PID 3284 wrote to memory of 3564 3284 file.exe 91 PID 3284 wrote to memory of 3564 3284 file.exe 91 PID 3564 wrote to memory of 3780 3564 file.exe 94 PID 3564 wrote to memory of 3780 3564 file.exe 94 PID 3564 wrote to memory of 3780 3564 file.exe 94 PID 3564 wrote to memory of 3780 3564 file.exe 94 PID 3564 wrote to memory of 3780 3564 file.exe 94 PID 3564 wrote to memory of 3780 3564 file.exe 94 PID 3564 wrote to memory of 3780 3564 file.exe 94 PID 3564 wrote to memory of 3780 3564 file.exe 94 PID 3564 wrote to memory of 3780 3564 file.exe 94 PID 3564 wrote to memory of 3780 3564 file.exe 94 PID 3780 wrote to memory of 2044 3780 file.exe 98 PID 3780 wrote to memory of 2044 3780 file.exe 98 PID 3780 wrote to memory of 2044 3780 file.exe 98 PID 3780 wrote to memory of 4556 3780 file.exe 99 PID 3780 wrote to memory of 4556 3780 file.exe 99 PID 3780 wrote to memory of 4556 3780 file.exe 99 PID 4556 wrote to memory of 4256 4556 build3.exe 100 PID 4556 wrote to memory of 4256 4556 build3.exe 100 PID 4556 wrote to memory of 4256 4556 build3.exe 100 PID 2044 wrote to memory of 1408 2044 build2.exe 102 PID 2044 wrote to memory of 1408 2044 build2.exe 102 PID 2044 wrote to memory of 1408 2044 build2.exe 102 PID 2044 wrote to memory of 1408 2044 build2.exe 102 PID 2044 wrote to memory of 1408 2044 build2.exe 102 PID 2044 wrote to memory of 1408 2044 build2.exe 102 PID 2044 wrote to memory of 1408 2044 build2.exe 102 PID 2044 wrote to memory of 1408 2044 build2.exe 102 PID 2044 wrote to memory of 1408 2044 build2.exe 102 PID 1408 wrote to memory of 3400 1408 build2.exe 103 PID 1408 wrote to memory of 3400 1408 build2.exe 103 PID 1408 wrote to memory of 3400 1408 build2.exe 103 PID 3400 wrote to memory of 4424 3400 cmd.exe 105 PID 3400 wrote to memory of 4424 3400 cmd.exe 105 PID 3400 wrote to memory of 4424 3400 cmd.exe 105 PID 2980 wrote to memory of 3352 2980 mstsca.exe 111 PID 2980 wrote to memory of 3352 2980 mstsca.exe 111 PID 2980 wrote to memory of 3352 2980 mstsca.exe 111
Processes
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2692 -
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3284 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\5487c5a0-c78c-4e24-88f6-b370055cbc36" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2328
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3564 -
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3780 -
C:\Users\Admin\AppData\Local\df7dc013-a318-4170-b981-4763f16f2331\build2.exe"C:\Users\Admin\AppData\Local\df7dc013-a318-4170-b981-4763f16f2331\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2044 -
C:\Users\Admin\AppData\Local\df7dc013-a318-4170-b981-4763f16f2331\build2.exe"C:\Users\Admin\AppData\Local\df7dc013-a318-4170-b981-4763f16f2331\build2.exe"6⤵
- Checks computer location settings
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1408 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\df7dc013-a318-4170-b981-4763f16f2331\build2.exe" & exit7⤵
- Suspicious use of WriteProcessMemory
PID:3400 -
C:\Windows\SysWOW64\timeout.exetimeout /t 68⤵
- Delays execution with timeout.exe
PID:4424
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C:\Users\Admin\AppData\Local\df7dc013-a318-4170-b981-4763f16f2331\build3.exe"C:\Users\Admin\AppData\Local\df7dc013-a318-4170-b981-4763f16f2331\build3.exe"5⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4556 -
C:\Windows\SysWOW64\schtasks.exe/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"6⤵
- Creates scheduled task(s)
PID:4256
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C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exeC:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:2980 -
C:\Windows\SysWOW64\schtasks.exe/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"2⤵
- Creates scheduled task(s)
PID:3352
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C:\Windows\system32\rundll32.exe"C:\Windows\system32\rundll32.exe" "C:\Windows\SYSTEM32\EDGEHTML.dll",#141 Microsoft.VCLibs.140.00_8wekyb3d8bbwe1⤵PID:4108
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k UnistackSvcGroup1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1540
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
593KB
MD5c8fd9be83bc728cc04beffafc2907fe9
SHA195ab9f701e0024cedfbd312bcfe4e726744c4f2e
SHA256ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
SHA512fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040
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Filesize
2.0MB
MD51cc453cdf74f31e4d913ff9c10acdde2
SHA16e85eae544d6e965f15fa5c39700fa7202f3aafe
SHA256ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
SHA512dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize2KB
MD5651484023a0a0eff81663c1b91002c8c
SHA19a38c674bb602eb6ed855d61cdddc8d8e5f7baf9
SHA256058f0a03b30cf6acfe9f33f4db7ac91153a094a8804e6886bf476fdc317e7f8d
SHA512d74974ecdcf9a3cb8c55563bc27c273b401b0b6d88a3a5cc963fa1fd927b11e97ccf6641ea060c0890a62c216751f663d0c1c6f5e9d397e1461b8592ce0279ca
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize1KB
MD52a61a3d0f5beb7727441b0e010c30d7d
SHA12dc8b67f13196d3a658d79c9c575bf0a0b75da15
SHA2568f97e861acd3950fde5361476dd989039edff251a00b7de4df84cbacfa629a0d
SHA512d29a461cd7c4746015684c9213a72748d5440191b4b9f07209723e0b8e2b59f11cafe4b87acd123d2987ed1990d3204402f69b7f78f8607782c441efb307a12a
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize488B
MD5640743ad7b8ef7f44cc047470b630605
SHA1e900de5994dce82e699375a879175231e39c5582
SHA256c2ec25eb90ffc35023569615c827f63ebb4e6e99dff1dcbe0cc3f10977595edc
SHA512429bf46a3c7c4bfe555c021fd0d20a18f898b019c6b9d2f724c4f86c3dc0a481d8d920bdf2d49fabf857525175c3ca9b6534f1cd7d4f5112cf76ff97a78a5264
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize482B
MD52bd114a2cf564e665a7a84cca9ce2682
SHA166252e5c19f1f657dde5bb89fed4492c35767a5d
SHA2569e2b8c8c456507a4d32174eb4db9c630124d1a9c755cd3f2f6f07b4c9d20ac01
SHA5123f0d55ceda740f73c0fade8651ef6ad54917c3a89d46f4c2a52c317c3a9e78685f26db8b9c67376eca0bc17eee40a0dbe5fa66dd3b59fa3cfeb91472ffd6a525
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Filesize
786KB
MD5f49c53a4db7c7a6e0ef1e9243cde5ea5
SHA186e2388514f7f4c2a7acd09c03325b0ed690ef83
SHA256cd1e5d43202f27d75d48c1d6963ef572eb3321e1ca3d6510c6a999598db09a07
SHA5128bd94a77fcbccbd25d6dcdbad6cf1aefc5e5cefdf3f73f4f7bda2d68147e0a87a877968067528c2bb3cfb95c3ffd668620547fb87a8691ed534bfc24a74b0226
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Filesize
338KB
MD54af351cad48ae0a8310396db36088d01
SHA1587e5cce7a25de94acd440925981f27c4b052113
SHA256e81cf314b9336ae58e0ed051467245f4eea056c30bd54429d740aad521813092
SHA51273b347494835d2fbb378f87c4d1f81b71801e14d598377e288af08f37415f85dc212d71128e85111131938c62f49c6eb3fb7c74ba9f6927025cbbd5da799a982
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Filesize
338KB
MD54af351cad48ae0a8310396db36088d01
SHA1587e5cce7a25de94acd440925981f27c4b052113
SHA256e81cf314b9336ae58e0ed051467245f4eea056c30bd54429d740aad521813092
SHA51273b347494835d2fbb378f87c4d1f81b71801e14d598377e288af08f37415f85dc212d71128e85111131938c62f49c6eb3fb7c74ba9f6927025cbbd5da799a982
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Filesize
338KB
MD54af351cad48ae0a8310396db36088d01
SHA1587e5cce7a25de94acd440925981f27c4b052113
SHA256e81cf314b9336ae58e0ed051467245f4eea056c30bd54429d740aad521813092
SHA51273b347494835d2fbb378f87c4d1f81b71801e14d598377e288af08f37415f85dc212d71128e85111131938c62f49c6eb3fb7c74ba9f6927025cbbd5da799a982
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Filesize
338KB
MD54af351cad48ae0a8310396db36088d01
SHA1587e5cce7a25de94acd440925981f27c4b052113
SHA256e81cf314b9336ae58e0ed051467245f4eea056c30bd54429d740aad521813092
SHA51273b347494835d2fbb378f87c4d1f81b71801e14d598377e288af08f37415f85dc212d71128e85111131938c62f49c6eb3fb7c74ba9f6927025cbbd5da799a982
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a