Analysis
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max time kernel
149s -
max time network
153s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
11-03-2024 09:25
Behavioral task
behavioral1
Sample
c03ce838f2bba250ac039f9509f7c93e.exe
Resource
win7-20240221-en
General
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Target
c03ce838f2bba250ac039f9509f7c93e.exe
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Size
1.4MB
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MD5
c03ce838f2bba250ac039f9509f7c93e
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SHA1
28adabeac4ac799a87d8a0557636f71106ef94f1
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SHA256
35a16a156ed57760d503624ac6b8def2ab5f92f2760e3cd7d4dbee731ea787dc
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SHA512
cc007d96d622a761ce7901b1b2ee21750ec01aacf75ca24ffe92910680baa73a1d9680d915e430849210e34f761cd7f757748050fdff35a0e2b019460e1c09f6
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SSDEEP
24576:Y6yJMY9UFoRDhkeYM1jJR97zUbia9JVe0hs5WfBiERJchVML1bT6Ed:3Y9UORVOM1jJHzaiape0hsABFRJch6LB
Malware Config
Extracted
remcos
2.5.0 Pro
GRACED
thankyoulord.ddns.net:5050
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audio_folder
MicRecords
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audio_path
%AppData%
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audio_record_time
5
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connect_delay
0
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connect_interval
1
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copy_file
remcos.exe
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copy_folder
remcos
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delete_file
false
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hide_file
false
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hide_keylog_file
false
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install_flag
false
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install_path
%AppData%
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keylog_crypt
false
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keylog_file
logs.dat
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keylog_flag
false
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keylog_folder
remcos
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keylog_path
%AppData%
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mouse_option
false
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mutex
Remcos-0S5XD9
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screenshot_crypt
false
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screenshot_flag
false
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screenshot_folder
Screenshots
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screenshot_path
%AppData%
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screenshot_time
10
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startup_value
remcos
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take_screenshot_option
false
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take_screenshot_time
5
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take_screenshot_title
wikipedia;solitaire;
Signatures
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ReZer0 packer 1 IoCs
Detects ReZer0, a packer with multiple versions used in various campaigns.
Processes:
resource yara_rule behavioral1/memory/3056-9-0x00000000020B0000-0x00000000020DC000-memory.dmp rezer0 -
Executes dropped EXE 1 IoCs
Processes:
test.exepid process 3056 test.exe -
Loads dropped DLL 1 IoCs
Processes:
cmd.exepid process 2760 cmd.exe -
Processes:
resource yara_rule behavioral1/memory/1436-0-0x0000000000400000-0x00000000006F1000-memory.dmp upx behavioral1/memory/1436-10-0x0000000000400000-0x00000000006F1000-memory.dmp upx behavioral1/memory/1436-31-0x0000000000400000-0x00000000006F1000-memory.dmp upx -
Uses the VBS compiler for execution 1 TTPs
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Suspicious use of SetThreadContext 1 IoCs
Processes:
test.exedescription pid process target process PID 3056 set thread context of 2816 3056 test.exe vbc.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 1 IoCs
Processes:
test.exepid process 3056 test.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
test.exedescription pid process Token: SeDebugPrivilege 3056 test.exe -
Suspicious use of WriteProcessMemory 23 IoCs
Processes:
c03ce838f2bba250ac039f9509f7c93e.execmd.exetest.exedescription pid process target process PID 1436 wrote to memory of 2760 1436 c03ce838f2bba250ac039f9509f7c93e.exe cmd.exe PID 1436 wrote to memory of 2760 1436 c03ce838f2bba250ac039f9509f7c93e.exe cmd.exe PID 1436 wrote to memory of 2760 1436 c03ce838f2bba250ac039f9509f7c93e.exe cmd.exe PID 1436 wrote to memory of 2760 1436 c03ce838f2bba250ac039f9509f7c93e.exe cmd.exe PID 2760 wrote to memory of 3056 2760 cmd.exe test.exe PID 2760 wrote to memory of 3056 2760 cmd.exe test.exe PID 2760 wrote to memory of 3056 2760 cmd.exe test.exe PID 2760 wrote to memory of 3056 2760 cmd.exe test.exe PID 3056 wrote to memory of 2708 3056 test.exe schtasks.exe PID 3056 wrote to memory of 2708 3056 test.exe schtasks.exe PID 3056 wrote to memory of 2708 3056 test.exe schtasks.exe PID 3056 wrote to memory of 2708 3056 test.exe schtasks.exe PID 3056 wrote to memory of 2816 3056 test.exe vbc.exe PID 3056 wrote to memory of 2816 3056 test.exe vbc.exe PID 3056 wrote to memory of 2816 3056 test.exe vbc.exe PID 3056 wrote to memory of 2816 3056 test.exe vbc.exe PID 3056 wrote to memory of 2816 3056 test.exe vbc.exe PID 3056 wrote to memory of 2816 3056 test.exe vbc.exe PID 3056 wrote to memory of 2816 3056 test.exe vbc.exe PID 3056 wrote to memory of 2816 3056 test.exe vbc.exe PID 3056 wrote to memory of 2816 3056 test.exe vbc.exe PID 3056 wrote to memory of 2816 3056 test.exe vbc.exe PID 3056 wrote to memory of 2816 3056 test.exe vbc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\c03ce838f2bba250ac039f9509f7c93e.exe"C:\Users\Admin\AppData\Local\Temp\c03ce838f2bba250ac039f9509f7c93e.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c test.exe2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\test.exetest.exe3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vXAlJeWc" /XML "C:\Users\Admin\AppData\Local\Temp\tmp753F.tmp"4⤵
- Creates scheduled task(s)
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"{path}"4⤵
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\tmp753F.tmpFilesize
1KB
MD5935f3a74c7d1af321c5ee8a22d2fb0a7
SHA10d8fec9221e405eb0a8f9922c35217526053595b
SHA256c483f739d79cac837c645097b7f11aee1e38712d44ab9ccbb2364198a6a31988
SHA5125d8ab2ea2925983160db7893ab3e03159844c3a6cc71364c7731da139e747520fd6d053c123060049104f1020deedaf4b25e6c413875cbafa8fa33073e1bec5e
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\Users\Admin\AppData\Local\Temp\test.exeFilesize
330KB
MD5261aa73f93c90dcec0c36a51cb9b5dee
SHA1b0c41e06cd2ded81706820423db40bf8fea2c957
SHA256ae160b749914bd56aecbcf43d56a59bde2069a145682b2911fe50c6adabe1b54
SHA5127b90335b4a7db7b5056f6d60db642754038dc544bd2c1f82e68b1f8e339bf70227f0c08d157b4ca1004448fab7d109f0239196f242d0edeab978de9025a3c0ed
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memory/1436-10-0x0000000000400000-0x00000000006F1000-memory.dmpFilesize
2.9MB
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memory/1436-31-0x0000000000400000-0x00000000006F1000-memory.dmpFilesize
2.9MB
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memory/1436-0-0x0000000000400000-0x00000000006F1000-memory.dmpFilesize
2.9MB
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memory/2816-25-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2816-30-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2816-53-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2816-51-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2816-16-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2816-18-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2816-20-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2816-21-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2816-22-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2816-23-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2816-24-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmpFilesize
4KB
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memory/2816-49-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2816-47-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2816-27-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2816-29-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2816-45-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2816-43-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2816-32-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2816-33-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2816-34-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2816-35-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2816-37-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2816-39-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/2816-41-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/3056-5-0x00000000002E0000-0x0000000000338000-memory.dmpFilesize
352KB
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memory/3056-9-0x00000000020B0000-0x00000000020DC000-memory.dmpFilesize
176KB
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memory/3056-28-0x00000000745D0000-0x0000000074CBE000-memory.dmpFilesize
6.9MB
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memory/3056-6-0x00000000745D0000-0x0000000074CBE000-memory.dmpFilesize
6.9MB
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memory/3056-7-0x0000000004F30000-0x0000000004F70000-memory.dmpFilesize
256KB
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memory/3056-8-0x00000000002B0000-0x00000000002B8000-memory.dmpFilesize
32KB