Analysis
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max time kernel
120s -
max time network
126s -
platform
windows7_x64 -
resource
win7-20231215-en -
resource tags
arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system -
submitted
27-12-2023 02:07
Static task
static1
Behavioral task
behavioral1
Sample
d38bc9871b0eba08a6b77314a6d3fdc94531315c2659ea60d8d23b4450ed3838.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
d38bc9871b0eba08a6b77314a6d3fdc94531315c2659ea60d8d23b4450ed3838.exe
Resource
win10v2004-20231215-en
General
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Target
d38bc9871b0eba08a6b77314a6d3fdc94531315c2659ea60d8d23b4450ed3838.exe
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Size
4.9MB
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MD5
f836f277cbcadfecfc988bf350d410c3
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SHA1
f9a66d7876a6eb09763e0705beaa999d99f53754
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SHA256
d38bc9871b0eba08a6b77314a6d3fdc94531315c2659ea60d8d23b4450ed3838
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SHA512
ac284e90bf72d564ceaeda28383efc8793f286002d2d7ae37f08f05a9170faa5f77a8e741cb60fabb1f48f9abc769070fc3620fa9c5d7dfce60029b6d58c8280
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SSDEEP
12288:D6BeSpuojQEv1E729k4nRQ/ceb5WdWOeoP3/F+2nGr6A5zuzhGlC5LcB+cVgeMtb:E0yLW2mudcocIE
Malware Config
Extracted
marsstealer
Default
Signatures
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Mars Stealer
An infostealer written in C++ based on other infostealers.
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Executes dropped EXE 1 IoCs
Processes:
1MUY.exepid process 2740 1MUY.exe -
Loads dropped DLL 5 IoCs
Processes:
d38bc9871b0eba08a6b77314a6d3fdc94531315c2659ea60d8d23b4450ed3838.exeWerFault.exepid process 3012 d38bc9871b0eba08a6b77314a6d3fdc94531315c2659ea60d8d23b4450ed3838.exe 3012 d38bc9871b0eba08a6b77314a6d3fdc94531315c2659ea60d8d23b4450ed3838.exe 3024 WerFault.exe 3024 WerFault.exe 3024 WerFault.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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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Program crash 1 IoCs
Processes:
WerFault.exepid pid_target process target process 3024 2740 WerFault.exe 1MUY.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
d38bc9871b0eba08a6b77314a6d3fdc94531315c2659ea60d8d23b4450ed3838.exe1MUY.exedescription pid process target process PID 3012 wrote to memory of 2740 3012 d38bc9871b0eba08a6b77314a6d3fdc94531315c2659ea60d8d23b4450ed3838.exe 1MUY.exe PID 3012 wrote to memory of 2740 3012 d38bc9871b0eba08a6b77314a6d3fdc94531315c2659ea60d8d23b4450ed3838.exe 1MUY.exe PID 3012 wrote to memory of 2740 3012 d38bc9871b0eba08a6b77314a6d3fdc94531315c2659ea60d8d23b4450ed3838.exe 1MUY.exe PID 3012 wrote to memory of 2740 3012 d38bc9871b0eba08a6b77314a6d3fdc94531315c2659ea60d8d23b4450ed3838.exe 1MUY.exe PID 2740 wrote to memory of 3024 2740 1MUY.exe WerFault.exe PID 2740 wrote to memory of 3024 2740 1MUY.exe WerFault.exe PID 2740 wrote to memory of 3024 2740 1MUY.exe WerFault.exe PID 2740 wrote to memory of 3024 2740 1MUY.exe WerFault.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\d38bc9871b0eba08a6b77314a6d3fdc94531315c2659ea60d8d23b4450ed3838.exe"C:\Users\Admin\AppData\Local\Temp\d38bc9871b0eba08a6b77314a6d3fdc94531315c2659ea60d8d23b4450ed3838.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\Identities\1MUY.exe"C:\Users\Admin\AppData\Roaming\Identities\1MUY.exe"2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2740 -s 6323⤵
- Loads dropped DLL
- Program crash
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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\Users\Admin\AppData\Roaming\Identities\1MUY.exeFilesize
159KB
MD51f51c4bdd8bd5b81fe2638ffa85fd5d2
SHA143146ce6867ba788dc50ddfe1d9ec4d89aafd859
SHA256e7dcfe91d1f3c1b1d33b8f7eae174999b04faec7825474baf846aaa408d97c38
SHA5127f0d34c1ccf39cb0c5600507b2b00185e097a6423cc622b66659cd46aef6bb55b6a5806971a816eab3f990b8099cdc9a606cacab49a1f6bd002fcf9a2964ca98
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memory/2740-13-0x0000000000400000-0x000000000043D000-memory.dmpFilesize
244KB
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memory/3012-0-0x0000000000890000-0x0000000000922000-memory.dmpFilesize
584KB
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memory/3012-1-0x0000000074530000-0x0000000074C1E000-memory.dmpFilesize
6.9MB
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memory/3012-11-0x0000000001F60000-0x0000000001F9D000-memory.dmpFilesize
244KB
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memory/3012-12-0x0000000001F60000-0x0000000001F9D000-memory.dmpFilesize
244KB
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memory/3012-14-0x0000000074530000-0x0000000074C1E000-memory.dmpFilesize
6.9MB