Analysis
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max time kernel
151s -
max time network
156s -
platform
windows10-2004_x64 -
resource
win10v2004-20230915-en -
resource tags
arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system -
submitted
20-10-2023 12:36
Static task
static1
Behavioral task
behavioral1
Sample
e8a091a84dd2ea7ee429135ff48e9f48f7787637ccb79f6c3eb42f34588bc684.exe
Resource
win7-20230831-en
Behavioral task
behavioral2
Sample
e8a091a84dd2ea7ee429135ff48e9f48f7787637ccb79f6c3eb42f34588bc684.exe
Resource
win10v2004-20230915-en
General
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Target
e8a091a84dd2ea7ee429135ff48e9f48f7787637ccb79f6c3eb42f34588bc684.exe
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Size
473KB
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MD5
f83fb9ce6a83da58b20685c1d7e1e546
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SHA1
01c459b549c1c2a68208d38d4ba5e36d29212a4f
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SHA256
e8a091a84dd2ea7ee429135ff48e9f48f7787637ccb79f6c3eb42f34588bc684
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SHA512
934ec9073a28b90e8df785bef49f224789da59f83729208b92dba0503e2894b3f48ed04b20de1ba49374b1cd26f0c87e8e5ab79e817258135e3be2c171f3f396
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SSDEEP
12288:v6l/7FpnaeoQbRLBYdunMCayql4YcQD+AgJbAWgjbgpQ:CDna43YAKl4Yci+AggEpQ
Malware Config
Extracted
C:\Users\DECRYPT-FILES.html
Signatures
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Maze
Ransomware family also known as ChaCha.
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Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Drops startup file 4 IoCs
Processes:
e8a091a84dd2ea7ee429135ff48e9f48f7787637ccb79f6c3eb42f34588bc684.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\DECRYPT-FILES.html e8a091a84dd2ea7ee429135ff48e9f48f7787637ccb79f6c3eb42f34588bc684.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\70lbe4ww5.dat e8a091a84dd2ea7ee429135ff48e9f48f7787637ccb79f6c3eb42f34588bc684.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\DECRYPT-FILES.html e8a091a84dd2ea7ee429135ff48e9f48f7787637ccb79f6c3eb42f34588bc684.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\70lbe4ww5.dat e8a091a84dd2ea7ee429135ff48e9f48f7787637ccb79f6c3eb42f34588bc684.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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Sets desktop wallpaper using registry 2 TTPs 1 IoCs
Processes:
e8a091a84dd2ea7ee429135ff48e9f48f7787637ccb79f6c3eb42f34588bc684.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\\\123456789.bmp" e8a091a84dd2ea7ee429135ff48e9f48f7787637ccb79f6c3eb42f34588bc684.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
e8a091a84dd2ea7ee429135ff48e9f48f7787637ccb79f6c3eb42f34588bc684.exepid process 4000 e8a091a84dd2ea7ee429135ff48e9f48f7787637ccb79f6c3eb42f34588bc684.exe 4000 e8a091a84dd2ea7ee429135ff48e9f48f7787637ccb79f6c3eb42f34588bc684.exe -
Suspicious use of AdjustPrivilegeToken 64 IoCs
Processes:
wmic.exevssvc.exewmic.exedescription pid process Token: SeIncreaseQuotaPrivilege 2248 wmic.exe Token: SeSecurityPrivilege 2248 wmic.exe Token: SeTakeOwnershipPrivilege 2248 wmic.exe Token: SeLoadDriverPrivilege 2248 wmic.exe Token: SeSystemProfilePrivilege 2248 wmic.exe Token: SeSystemtimePrivilege 2248 wmic.exe Token: SeProfSingleProcessPrivilege 2248 wmic.exe Token: SeIncBasePriorityPrivilege 2248 wmic.exe Token: SeCreatePagefilePrivilege 2248 wmic.exe Token: SeBackupPrivilege 2248 wmic.exe Token: SeRestorePrivilege 2248 wmic.exe Token: SeShutdownPrivilege 2248 wmic.exe Token: SeDebugPrivilege 2248 wmic.exe Token: SeSystemEnvironmentPrivilege 2248 wmic.exe Token: SeRemoteShutdownPrivilege 2248 wmic.exe Token: SeUndockPrivilege 2248 wmic.exe Token: SeManageVolumePrivilege 2248 wmic.exe Token: 33 2248 wmic.exe Token: 34 2248 wmic.exe Token: 35 2248 wmic.exe Token: 36 2248 wmic.exe Token: SeIncreaseQuotaPrivilege 2248 wmic.exe Token: SeSecurityPrivilege 2248 wmic.exe Token: SeTakeOwnershipPrivilege 2248 wmic.exe Token: SeLoadDriverPrivilege 2248 wmic.exe Token: SeSystemProfilePrivilege 2248 wmic.exe Token: SeSystemtimePrivilege 2248 wmic.exe Token: SeProfSingleProcessPrivilege 2248 wmic.exe Token: SeIncBasePriorityPrivilege 2248 wmic.exe Token: SeCreatePagefilePrivilege 2248 wmic.exe Token: SeBackupPrivilege 2248 wmic.exe Token: SeRestorePrivilege 2248 wmic.exe Token: SeShutdownPrivilege 2248 wmic.exe Token: SeDebugPrivilege 2248 wmic.exe Token: SeSystemEnvironmentPrivilege 2248 wmic.exe Token: SeRemoteShutdownPrivilege 2248 wmic.exe Token: SeUndockPrivilege 2248 wmic.exe Token: SeManageVolumePrivilege 2248 wmic.exe Token: 33 2248 wmic.exe Token: 34 2248 wmic.exe Token: 35 2248 wmic.exe Token: 36 2248 wmic.exe Token: SeBackupPrivilege 464 vssvc.exe Token: SeRestorePrivilege 464 vssvc.exe Token: SeAuditPrivilege 464 vssvc.exe Token: SeIncreaseQuotaPrivilege 4784 wmic.exe Token: SeSecurityPrivilege 4784 wmic.exe Token: SeTakeOwnershipPrivilege 4784 wmic.exe Token: SeLoadDriverPrivilege 4784 wmic.exe Token: SeSystemProfilePrivilege 4784 wmic.exe Token: SeSystemtimePrivilege 4784 wmic.exe Token: SeProfSingleProcessPrivilege 4784 wmic.exe Token: SeIncBasePriorityPrivilege 4784 wmic.exe Token: SeCreatePagefilePrivilege 4784 wmic.exe Token: SeBackupPrivilege 4784 wmic.exe Token: SeRestorePrivilege 4784 wmic.exe Token: SeShutdownPrivilege 4784 wmic.exe Token: SeDebugPrivilege 4784 wmic.exe Token: SeSystemEnvironmentPrivilege 4784 wmic.exe Token: SeRemoteShutdownPrivilege 4784 wmic.exe Token: SeUndockPrivilege 4784 wmic.exe Token: SeManageVolumePrivilege 4784 wmic.exe Token: 33 4784 wmic.exe Token: 34 4784 wmic.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
e8a091a84dd2ea7ee429135ff48e9f48f7787637ccb79f6c3eb42f34588bc684.exedescription pid process target process PID 4000 wrote to memory of 2248 4000 e8a091a84dd2ea7ee429135ff48e9f48f7787637ccb79f6c3eb42f34588bc684.exe wmic.exe PID 4000 wrote to memory of 2248 4000 e8a091a84dd2ea7ee429135ff48e9f48f7787637ccb79f6c3eb42f34588bc684.exe wmic.exe PID 4000 wrote to memory of 4784 4000 e8a091a84dd2ea7ee429135ff48e9f48f7787637ccb79f6c3eb42f34588bc684.exe wmic.exe PID 4000 wrote to memory of 4784 4000 e8a091a84dd2ea7ee429135ff48e9f48f7787637ccb79f6c3eb42f34588bc684.exe wmic.exe -
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
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C:\Users\Admin\AppData\Local\Temp\e8a091a84dd2ea7ee429135ff48e9f48f7787637ccb79f6c3eb42f34588bc684.exe"C:\Users\Admin\AppData\Local\Temp\e8a091a84dd2ea7ee429135ff48e9f48f7787637ccb79f6c3eb42f34588bc684.exe"1⤵
- Drops startup file
- Sets desktop wallpaper using registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4000 -
C:\Windows\system32\wbem\wmic.exe"C:\m\..\Windows\rbav\..\system32\jkne\pkfnh\..\..\wbem\x\..\wmic.exe" shadowcopy delete2⤵
- Suspicious use of AdjustPrivilegeToken
PID:2248
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C:\Windows\system32\wbem\wmic.exe"C:\d\nmh\..\..\Windows\h\ps\..\..\system32\dm\..\wbem\bepxh\..\wmic.exe" shadowcopy delete2⤵
- Suspicious use of AdjustPrivilegeToken
PID:4784
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:464
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C:\Windows\system32\AUDIODG.EXEC:\Windows\system32\AUDIODG.EXE 0x4a0 0x31c1⤵PID:3936
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Roaming\Microsoft\Speech\Files\UserLexicons\SP_3F9B692A79854BADB08EF88D58242CD0.dat
Filesize940B
MD5e138584e3df90dbe6f55232c0fff93d0
SHA1a72c63341a493113f415bab492c816cf2006e03d
SHA256242082ac6ebc54dabdcfc8874bf431d5984aa1594f5ff156dbb0a310204bb1d3
SHA512cfb651198fa967617fa1d9a0a5b8362d85adb13b14825a24a160bde1e80a59d271134c692e6139f5ba8704265fc62ba26cde36d1b36813fce7838083aea68e2c
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Filesize
6KB
MD59ac945060a34aabaf34f52cc99f39fbe
SHA14755036a0c3e0ceb548347c25003319cb0efe2b0
SHA2560f9932c83170b1b0a83187c4dc045732266399dcc4af91e5a0b9a29336326ccc
SHA512a0ec64d369ed739c430b8fc885fadb6527770f73635dc0503e91066537c9e38b232e9d8b17f138a8b05b277d25e1a9a478faaf986061b2b5ce7ecf9dab552187