Analysis
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max time kernel
142s -
max time network
134s -
platform
windows10-2004_x64 -
resource
win10v2004-20230703-en -
resource tags
arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system -
submitted
30-07-2023 17:33
Static task
static1
Behavioral task
behavioral1
Sample
utweb_installer.exe
Resource
win7-20230712-en
Behavioral task
behavioral2
Sample
utweb_installer.exe
Resource
win10v2004-20230703-en
General
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Target
utweb_installer.exe
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Size
1.7MB
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MD5
429e56e044f63422147b548ed1bd97a8
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SHA1
c26d32fd4fd0628381ecac39c60cc1c4808b3fe0
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SHA256
75085e19a2fb105bf96bf5f942cd3fce8c4bd71e8d761c16e96d194e45a5d555
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SHA512
c3a67877ec16e85f8f55027ad05b7644517d725575432cb4ebe5ae5da5b95bc258d0cac2145b571ef1f2522bdd19507516a0edc747c08d62bcc9f2cb10a8a5cb
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SSDEEP
24576:v7FUDowAyrTVE3U5FxXuX5LsU/gpJPl/M/EdYgLMp/rcisGTjgy8xJ4aldp78JH:vBuZrEUleRjIpZlU/EigLerrzTjg5M9H
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
utweb_installer.tmppid process 4236 utweb_installer.tmp -
Loads dropped DLL 2 IoCs
Processes:
utweb_installer.tmppid process 4236 utweb_installer.tmp 4236 utweb_installer.tmp -
Script User-Agent 1 IoCs
Uses user-agent string associated with script host/environment.
Processes:
description flow ioc HTTP User-Agent header 20 Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5) -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
utweb_installer.exedescription pid process target process PID 3248 wrote to memory of 4236 3248 utweb_installer.exe utweb_installer.tmp PID 3248 wrote to memory of 4236 3248 utweb_installer.exe utweb_installer.tmp PID 3248 wrote to memory of 4236 3248 utweb_installer.exe utweb_installer.tmp
Processes
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C:\Users\Admin\AppData\Local\Temp\utweb_installer.exe"C:\Users\Admin\AppData\Local\Temp\utweb_installer.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:3248 -
C:\Users\Admin\AppData\Local\Temp\is-4UNF7.tmp\utweb_installer.tmp"C:\Users\Admin\AppData\Local\Temp\is-4UNF7.tmp\utweb_installer.tmp" /SL5="$3020E,898126,819200,C:\Users\Admin\AppData\Local\Temp\utweb_installer.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
PID:4236
Network
MITRE ATT&CK Matrix
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.0MB
MD5c9f691236ee6a47257a5ffa64ff13831
SHA13fd1df0f872431f2028d7727c55441e9cfb6ed0c
SHA2560c08e3fb5c375a4935d3bc08574a0d810630131f1af44a3541555038984566b6
SHA512ddd660c2bd3afa0c3e7b2334d132bd489df6a07bd5ba0a13b439b29667abb51432f863790b299e1d463e968a6611e6f6b72ce2c540ebfd185ac6c023006397a2
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Filesize
12KB
MD5a00cfe887e254c462ad0c6a6d3fb25b6
SHA1c603a192e23df46c719febf07fd4207c96b1f0f9
SHA256bca0271f56f7384942ff3affb79fa78ccdceabf7dda89ad3c138226da324cdb1
SHA5126dc95a05e2712d85067aa92144f7e00871d2f60e377c6df0253e3ff48a02280d4148578fbbf22018693227bdcc035a8bd391f3c390aed39ca58749f28fc19862
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Filesize
37KB
MD567965a5957a61867d661f05ae1f4773e
SHA1f14c0a4f154dc685bb7c65b2d804a02a0fb2360d
SHA256450b9b0ba25bf068afbc2b23d252585a19e282939bf38326384ea9112dfd0105
SHA512c6942818b9026dc5db2d62999d32cf99fe7289f79a28b8345af17acf9d13b2229a5e917a48ff1f6d59715bdbcb00c1625e0302abcfe10ca7e0475762e0a3f41b
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Filesize
37KB
MD567965a5957a61867d661f05ae1f4773e
SHA1f14c0a4f154dc685bb7c65b2d804a02a0fb2360d
SHA256450b9b0ba25bf068afbc2b23d252585a19e282939bf38326384ea9112dfd0105
SHA512c6942818b9026dc5db2d62999d32cf99fe7289f79a28b8345af17acf9d13b2229a5e917a48ff1f6d59715bdbcb00c1625e0302abcfe10ca7e0475762e0a3f41b