Analysis
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max time kernel
150s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
05-02-2024 19:22
Behavioral task
behavioral1
Sample
92caa349914a2e9f7d694d1c2ce7d856.exe
Resource
win7-20231215-en
General
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Target
92caa349914a2e9f7d694d1c2ce7d856.exe
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Size
1.4MB
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MD5
92caa349914a2e9f7d694d1c2ce7d856
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SHA1
2541038452323a02595883eedad016b6f210ffd5
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SHA256
f2e03050cfe530e817199ed77e97b143d7979fc6072f95c61abc23177a9796e3
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SHA512
d8ee3342760ca82ef51a733eb72ac56deaf676886007b0c354ab593e4c7f5195f7fb328e56710a9a6bc901c5a0b51c1d243f2a4436dfefdd2d97c90f1b7f4e7d
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SSDEEP
24576:66yJMY9UFoRDhkeYM1jJR97zUbia9JVe0hs5WfBiERJchVML1bT6E7:dY9UORVOM1jJHzaiape0hsABFRJch6Lv
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 behavioral2/memory/4896-12-0x0000000005E10000-0x0000000005E3C000-memory.dmp rezer0 -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
test.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1815711207-1844170477-3539718864-1000\Control Panel\International\Geo\Nation test.exe -
Executes dropped EXE 1 IoCs
Processes:
test.exepid process 4896 test.exe -
Processes:
resource yara_rule behavioral2/memory/3500-0-0x0000000000400000-0x00000000006F1000-memory.dmp upx behavioral2/memory/3500-14-0x0000000000400000-0x00000000006F1000-memory.dmp upx behavioral2/memory/3500-27-0x0000000000400000-0x00000000006F1000-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 4896 set thread context of 4240 4896 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 4896 test.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
test.exedescription pid process Token: SeDebugPrivilege 4896 test.exe -
Suspicious use of WriteProcessMemory 19 IoCs
Processes:
92caa349914a2e9f7d694d1c2ce7d856.execmd.exetest.exedescription pid process target process PID 3500 wrote to memory of 1648 3500 92caa349914a2e9f7d694d1c2ce7d856.exe cmd.exe PID 3500 wrote to memory of 1648 3500 92caa349914a2e9f7d694d1c2ce7d856.exe cmd.exe PID 3500 wrote to memory of 1648 3500 92caa349914a2e9f7d694d1c2ce7d856.exe cmd.exe PID 1648 wrote to memory of 4896 1648 cmd.exe test.exe PID 1648 wrote to memory of 4896 1648 cmd.exe test.exe PID 1648 wrote to memory of 4896 1648 cmd.exe test.exe PID 4896 wrote to memory of 536 4896 test.exe schtasks.exe PID 4896 wrote to memory of 536 4896 test.exe schtasks.exe PID 4896 wrote to memory of 536 4896 test.exe schtasks.exe PID 4896 wrote to memory of 4240 4896 test.exe vbc.exe PID 4896 wrote to memory of 4240 4896 test.exe vbc.exe PID 4896 wrote to memory of 4240 4896 test.exe vbc.exe PID 4896 wrote to memory of 4240 4896 test.exe vbc.exe PID 4896 wrote to memory of 4240 4896 test.exe vbc.exe PID 4896 wrote to memory of 4240 4896 test.exe vbc.exe PID 4896 wrote to memory of 4240 4896 test.exe vbc.exe PID 4896 wrote to memory of 4240 4896 test.exe vbc.exe PID 4896 wrote to memory of 4240 4896 test.exe vbc.exe PID 4896 wrote to memory of 4240 4896 test.exe vbc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\92caa349914a2e9f7d694d1c2ce7d856.exe"C:\Users\Admin\AppData\Local\Temp\92caa349914a2e9f7d694d1c2ce7d856.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c test.exe2⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\test.exetest.exe3⤵
- Checks computer location settings
- 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\tmp8C42.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\test.exeFilesize
330KB
MD5261aa73f93c90dcec0c36a51cb9b5dee
SHA1b0c41e06cd2ded81706820423db40bf8fea2c957
SHA256ae160b749914bd56aecbcf43d56a59bde2069a145682b2911fe50c6adabe1b54
SHA5127b90335b4a7db7b5056f6d60db642754038dc544bd2c1f82e68b1f8e339bf70227f0c08d157b4ca1004448fab7d109f0239196f242d0edeab978de9025a3c0ed
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C:\Users\Admin\AppData\Local\Temp\tmp8C42.tmpFilesize
1KB
MD57afcb5ac27ba6486390ed09397525d82
SHA1beedb6a613c2bd009e6d180d0a9545c9b810b9e9
SHA256e04a4ca13e4dc28ae9f2e1e49e5e925ef51ce93eeb50f6dd1e1ad598f33a6bf2
SHA512fb2f68922ac726ca0ccba47447c182b95f4255b9e2b1215c395533c22d117d7187e9e571c058fc7c5cf9dd5a5c01a147b60571b73cfc8856ff498c4dfd2dca4e
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memory/3500-14-0x0000000000400000-0x00000000006F1000-memory.dmpFilesize
2.9MB
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memory/3500-0-0x0000000000400000-0x00000000006F1000-memory.dmpFilesize
2.9MB
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memory/3500-27-0x0000000000400000-0x00000000006F1000-memory.dmpFilesize
2.9MB
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memory/4240-28-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/4240-23-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/4240-43-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/4240-35-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/4240-33-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/4240-32-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/4240-30-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/4240-29-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/4240-20-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/4240-26-0x0000000000400000-0x0000000000420000-memory.dmpFilesize
128KB
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memory/4896-24-0x0000000074B30000-0x00000000752E0000-memory.dmpFilesize
7.7MB
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memory/4896-6-0x0000000000F50000-0x0000000000FA8000-memory.dmpFilesize
352KB
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memory/4896-9-0x0000000005C10000-0x0000000005C20000-memory.dmpFilesize
64KB
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memory/4896-5-0x0000000074B30000-0x00000000752E0000-memory.dmpFilesize
7.7MB
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memory/4896-7-0x00000000060F0000-0x0000000006694000-memory.dmpFilesize
5.6MB
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memory/4896-8-0x00000000059F0000-0x0000000005A82000-memory.dmpFilesize
584KB
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memory/4896-13-0x0000000006000000-0x000000000609C000-memory.dmpFilesize
624KB
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memory/4896-12-0x0000000005E10000-0x0000000005E3C000-memory.dmpFilesize
176KB
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memory/4896-11-0x00000000059A0000-0x00000000059A8000-memory.dmpFilesize
32KB
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memory/4896-10-0x00000000059B0000-0x00000000059BA000-memory.dmpFilesize
40KB