Analysis
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max time kernel
296s -
max time network
300s -
platform
windows10-1703_x64 -
resource
win10-20240404-en -
resource tags
arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system -
submitted
29/04/2024, 05:17
Static task
static1
Behavioral task
behavioral1
Sample
b3948404b310152184d179dd6900220956e90bdaa72a3594be14ab7922fa2a97.exe
Resource
win7-20240419-en
General
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Target
b3948404b310152184d179dd6900220956e90bdaa72a3594be14ab7922fa2a97.exe
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Size
1.8MB
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MD5
2a7e3c27faad932683e24bcfe6cc0fd3
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SHA1
85bb29b42155b72527e3c43a03ef2048658e549c
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SHA256
b3948404b310152184d179dd6900220956e90bdaa72a3594be14ab7922fa2a97
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SHA512
5970dfcbddadb0f365bf841c5e870a8a27cc82f5f59ee6785bb41549eff174bf9a1fbe0290561f872ea077d7c96919ab7a3c7cbe1884d2962873173d2ebc57b1
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SSDEEP
49152:cf7E38DjrubmrC57Q+Xsg4+bYKneBq6eOXSL9ePl:cDE3Gruq+57t8g4MYOsqhOa9Yl
Malware Config
Extracted
amadey
4.17
http://193.233.132.167
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install_dir
4d0ab15804
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install_file
chrosha.exe
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strings_key
1a9519d7b465e1f4880fa09a6162d768
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url_paths
/enigma/index.php
Signatures
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Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 2 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ b3948404b310152184d179dd6900220956e90bdaa72a3594be14ab7922fa2a97.exe Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ chrosha.exe -
Blocklisted process makes network request 2 IoCs
flow pid Process 10 2096 rundll32.exe 11 2276 rundll32.exe -
Downloads MZ/PE file
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Checks BIOS information in registry 2 TTPs 4 IoCs
BIOS information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion b3948404b310152184d179dd6900220956e90bdaa72a3594be14ab7922fa2a97.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion b3948404b310152184d179dd6900220956e90bdaa72a3594be14ab7922fa2a97.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion chrosha.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion chrosha.exe -
Executes dropped EXE 1 IoCs
pid Process 4732 chrosha.exe -
Identifies Wine through registry keys 2 TTPs 2 IoCs
Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-1687926120-3022217735-1146543763-1000\Software\Wine b3948404b310152184d179dd6900220956e90bdaa72a3594be14ab7922fa2a97.exe Key opened \REGISTRY\USER\S-1-5-21-1687926120-3022217735-1146543763-1000\Software\Wine chrosha.exe -
Loads dropped DLL 3 IoCs
pid Process 4448 rundll32.exe 2096 rundll32.exe 2276 rundll32.exe -
Reads local data of messenger clients 2 TTPs
Infostealers often target stored data of messaging applications, which can include saved credentials and account information.
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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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Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
pid Process 4780 b3948404b310152184d179dd6900220956e90bdaa72a3594be14ab7922fa2a97.exe 4732 chrosha.exe -
Drops file in Windows directory 1 IoCs
description ioc Process File created C:\Windows\Tasks\chrosha.job b3948404b310152184d179dd6900220956e90bdaa72a3594be14ab7922fa2a97.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 17 IoCs
pid Process 4780 b3948404b310152184d179dd6900220956e90bdaa72a3594be14ab7922fa2a97.exe 4780 b3948404b310152184d179dd6900220956e90bdaa72a3594be14ab7922fa2a97.exe 4732 chrosha.exe 4732 chrosha.exe 2096 rundll32.exe 2096 rundll32.exe 2096 rundll32.exe 2096 rundll32.exe 2096 rundll32.exe 2096 rundll32.exe 2096 rundll32.exe 2096 rundll32.exe 2096 rundll32.exe 2096 rundll32.exe 1920 powershell.exe 1920 powershell.exe 1920 powershell.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1920 powershell.exe -
Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 4732 wrote to memory of 4448 4732 chrosha.exe 74 PID 4732 wrote to memory of 4448 4732 chrosha.exe 74 PID 4732 wrote to memory of 4448 4732 chrosha.exe 74 PID 4448 wrote to memory of 2096 4448 rundll32.exe 75 PID 4448 wrote to memory of 2096 4448 rundll32.exe 75 PID 2096 wrote to memory of 3240 2096 rundll32.exe 76 PID 2096 wrote to memory of 3240 2096 rundll32.exe 76 PID 2096 wrote to memory of 1920 2096 rundll32.exe 78 PID 2096 wrote to memory of 1920 2096 rundll32.exe 78 PID 4732 wrote to memory of 2276 4732 chrosha.exe 80 PID 4732 wrote to memory of 2276 4732 chrosha.exe 80 PID 4732 wrote to memory of 2276 4732 chrosha.exe 80
Processes
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C:\Users\Admin\AppData\Local\Temp\b3948404b310152184d179dd6900220956e90bdaa72a3594be14ab7922fa2a97.exe"C:\Users\Admin\AppData\Local\Temp\b3948404b310152184d179dd6900220956e90bdaa72a3594be14ab7922fa2a97.exe"1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:4780
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C:\Users\Admin\AppData\Local\Temp\4d0ab15804\chrosha.exeC:\Users\Admin\AppData\Local\Temp\4d0ab15804\chrosha.exe1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Executes dropped EXE
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4732 -
C:\Windows\SysWOW64\rundll32.exe"C:\Windows\System32\rundll32.exe" C:\Users\Admin\AppData\Roaming\c1ec479e5342a2\cred64.dll, Main2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:4448 -
C:\Windows\system32\rundll32.exe"C:\Windows\System32\rundll32.exe" C:\Users\Admin\AppData\Roaming\c1ec479e5342a2\cred64.dll, Main3⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2096 -
C:\Windows\system32\netsh.exenetsh wlan show profiles4⤵PID:3240
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -Command Compress-Archive -Path 'C:\Users\Admin\AppData\Local\Temp\_Files_\' -DestinationPath 'C:\Users\Admin\AppData\Local\Temp\687926120302_Desktop.zip' -CompressionLevel Optimal4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1920
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C:\Windows\SysWOW64\rundll32.exe"C:\Windows\System32\rundll32.exe" C:\Users\Admin\AppData\Roaming\c1ec479e5342a2\clip64.dll, Main2⤵
- Blocklisted process makes network request
- Loads dropped DLL
PID:2276
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
1.8MB
MD52a7e3c27faad932683e24bcfe6cc0fd3
SHA185bb29b42155b72527e3c43a03ef2048658e549c
SHA256b3948404b310152184d179dd6900220956e90bdaa72a3594be14ab7922fa2a97
SHA5125970dfcbddadb0f365bf841c5e870a8a27cc82f5f59ee6785bb41549eff174bf9a1fbe0290561f872ea077d7c96919ab7a3c7cbe1884d2962873173d2ebc57b1
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Filesize
1B
MD5c4ca4238a0b923820dcc509a6f75849b
SHA1356a192b7913b04c54574d18c28d46e6395428ab
SHA2566b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b
SHA5124dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a
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Filesize
109KB
MD5154c3f1334dd435f562672f2664fea6b
SHA151dd25e2ba98b8546de163b8f26e2972a90c2c79
SHA2565f431129f97f3d56929f1e5584819e091bd6c854d7e18503074737fc6d79e33f
SHA5121bca69bbcdb7ecd418769e9d4befc458f9f8e3cee81feb7316bb61e189e2904f4431e4cc7d291e179a5dec441b959d428d8e433f579036f763bbad6460222841
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Filesize
1.2MB
MD5f35b671fda2603ec30ace10946f11a90
SHA1059ad6b06559d4db581b1879e709f32f80850872
SHA25683e3df5bec15d5333935bea8b719a6d677e2fb3dc1cf9e18e7b82fd0438285c7
SHA512b5fa27d08c64727cef7fdda5e68054a4359cd697df50d70d1d90da583195959a139066a6214531bbc5f20cd4f9bc1ca3e4244396547381291a6a1d2df9cf8705