Analysis
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max time kernel
46s -
max time network
46s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
02-06-2024 23:28
Static task
static1
Behavioral task
behavioral1
Sample
tster.exe
Resource
win10v2004-20240508-en
General
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Target
tster.exe
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Size
11KB
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MD5
feb6fd23d005b8d70446866b206042f8
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SHA1
d7d01f6639e0f060e91a35949f9bf346aa0ea81a
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SHA256
81f3c9ef76877647a56874054c58756d67e512ad55a0ab273dfa5e88dddd7c5c
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SHA512
20f86fa77e079bd3794c32e793a9adb79ad7d847ca8d74591321153330dfa9aa15d11279b45a9497fec910b58533cdeedc293858fa29d20ffb80f96d519c70da
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SSDEEP
192:52R8JP/PCS+plrpcV5K9+JPiukknPfhTx0ujmN+LKyOLi:58Q/a9plrpcVI9SKQfgutKyOL
Malware Config
Extracted
gozi
Signatures
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Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
wscript.exetster.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation wscript.exe Key value queried \REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation tster.exe -
Executes dropped EXE 1 IoCs
Processes:
xfmnpne4.exepid process 4832 xfmnpne4.exe -
Loads dropped DLL 1 IoCs
Processes:
tster.exepid process 1788 tster.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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Legitimate hosting services abused for malware hosting/C2 1 TTPs 5 IoCs
Processes:
flow ioc 25 raw.githubusercontent.com 26 raw.githubusercontent.com 42 discord.com 43 discord.com 59 discord.com -
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 55 checkip.amazonaws.com -
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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Modifies registry class 7 IoCs
Processes:
reg.exereg.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000_Classes\ms-settings reg.exe Key created \REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000_Classes\ms-settings\shell reg.exe Key created \REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000_Classes\ms-settings\shell\open reg.exe Set value (str) \REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000_Classes\ms-settings\shell\open\command\ = "wscript.exe C:\\Users\\Admin\\AppData\\Local\\Temp\\pearpear81962580.vbs" reg.exe Key created \REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000_Classes\ms-settings\shell\open\command reg.exe Set value (str) \REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000_Classes\ms-settings\shell\open\command\DelegateExecute = "0" reg.exe Key created \REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000_Classes\ms-settings\shell\open\command reg.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
tster.exexfmnpne4.exepid process 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 4832 xfmnpne4.exe 4832 xfmnpne4.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe 1788 tster.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
tster.exexfmnpne4.exedescription pid process Token: SeDebugPrivilege 1788 tster.exe Token: SeDebugPrivilege 4832 xfmnpne4.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
tster.exepid process 1788 tster.exe -
Suspicious use of WriteProcessMemory 39 IoCs
Processes:
tster.execmd.exeComputerDefaults.exewscript.execmd.exexfmnpne4.exedescription pid process target process PID 1788 wrote to memory of 5092 1788 tster.exe reg.exe PID 1788 wrote to memory of 5092 1788 tster.exe reg.exe PID 1788 wrote to memory of 5092 1788 tster.exe reg.exe PID 1788 wrote to memory of 1404 1788 tster.exe reg.exe PID 1788 wrote to memory of 1404 1788 tster.exe reg.exe PID 1788 wrote to memory of 1404 1788 tster.exe reg.exe PID 1788 wrote to memory of 1064 1788 tster.exe cmd.exe PID 1788 wrote to memory of 1064 1788 tster.exe cmd.exe PID 1788 wrote to memory of 1064 1788 tster.exe cmd.exe PID 1064 wrote to memory of 3960 1064 cmd.exe ComputerDefaults.exe PID 1064 wrote to memory of 3960 1064 cmd.exe ComputerDefaults.exe PID 1064 wrote to memory of 3960 1064 cmd.exe ComputerDefaults.exe PID 3960 wrote to memory of 4272 3960 ComputerDefaults.exe wscript.exe PID 3960 wrote to memory of 4272 3960 ComputerDefaults.exe wscript.exe PID 3960 wrote to memory of 4272 3960 ComputerDefaults.exe wscript.exe PID 4272 wrote to memory of 548 4272 wscript.exe cmd.exe PID 4272 wrote to memory of 548 4272 wscript.exe cmd.exe PID 4272 wrote to memory of 548 4272 wscript.exe cmd.exe PID 1788 wrote to memory of 2312 1788 tster.exe cmd.exe PID 1788 wrote to memory of 2312 1788 tster.exe cmd.exe PID 1788 wrote to memory of 2312 1788 tster.exe cmd.exe PID 2312 wrote to memory of 456 2312 cmd.exe schtasks.exe PID 2312 wrote to memory of 456 2312 cmd.exe schtasks.exe PID 2312 wrote to memory of 456 2312 cmd.exe schtasks.exe PID 1788 wrote to memory of 4832 1788 tster.exe xfmnpne4.exe PID 1788 wrote to memory of 4832 1788 tster.exe xfmnpne4.exe PID 4832 wrote to memory of 3424 4832 xfmnpne4.exe Explorer.EXE PID 4832 wrote to memory of 3424 4832 xfmnpne4.exe Explorer.EXE PID 4832 wrote to memory of 3424 4832 xfmnpne4.exe Explorer.EXE PID 4832 wrote to memory of 3424 4832 xfmnpne4.exe Explorer.EXE PID 4832 wrote to memory of 3424 4832 xfmnpne4.exe Explorer.EXE PID 4832 wrote to memory of 3424 4832 xfmnpne4.exe Explorer.EXE PID 4832 wrote to memory of 3424 4832 xfmnpne4.exe Explorer.EXE PID 4832 wrote to memory of 3424 4832 xfmnpne4.exe Explorer.EXE PID 4832 wrote to memory of 3424 4832 xfmnpne4.exe Explorer.EXE PID 4832 wrote to memory of 3424 4832 xfmnpne4.exe Explorer.EXE PID 4832 wrote to memory of 3424 4832 xfmnpne4.exe Explorer.EXE PID 4832 wrote to memory of 3424 4832 xfmnpne4.exe Explorer.EXE PID 4832 wrote to memory of 3424 4832 xfmnpne4.exe Explorer.EXE
Processes
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵
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C:\Users\Admin\AppData\Local\Temp\tster.exe"C:\Users\Admin\AppData\Local\Temp\tster.exe"2⤵
- Checks computer location settings
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\reg.exe"C:\Windows\system32\reg.exe" add "HKCU\Software\Classes\ms-settings\shell\open\command" /d "wscript.exe C:\Users\Admin\AppData\Local\Temp\pearpear81962580.vbs" /f3⤵
- Modifies registry class
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C:\Windows\SysWOW64\reg.exe"C:\Windows\system32\reg.exe" add "HKCU\Software\Classes\ms-settings\shell\open\command" /v DelegateExecute /d "0" /f3⤵
- Modifies registry class
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C:\Windows\SysWOW64\cmd.exe"cmd.exe" /C computerdefaults.exe3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\ComputerDefaults.execomputerdefaults.exe4⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\wscript.exe"wscript.exe" C:\Users\Admin\AppData\Local\Temp\pearpear81962580.vbs5⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C del C:\Windows\System32\drivers\etc\hosts6⤵
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C schtasks /Create /SC ONLOGON /TN PlexMediaServerUpdater_9DaxSEEMIrKyr0dPz050MX /TR "C:\Users\Admin\AppData\Local\Microsoft\Credentials\9DaxSEEMIrKyr0dPz050MX.exe" /RL HIGHEST /IT3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exeschtasks /Create /SC ONLOGON /TN PlexMediaServerUpdater_9DaxSEEMIrKyr0dPz050MX /TR "C:\Users\Admin\AppData\Local\Microsoft\Credentials\9DaxSEEMIrKyr0dPz050MX.exe" /RL HIGHEST /IT4⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\xfmnpne4.exe"C:\Users\Admin\AppData\Local\Temp\xfmnpne4.exe" explorer.exe3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=1304,i,18168883380598738769,14202261231630113808,262144 --variations-seed-version --mojo-platform-channel-handle=3732 /prefetch:81⤵
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\Costura\40BD99E3E2E3C109881E4ECA2DEDC617\32\sqlite.interop.dllFilesize
1.4MB
MD56f2fdecc48e7d72ca1eb7f17a97e59ad
SHA1fcbc8c4403e5c8194ee69158d7e70ee7dbd4c056
SHA25670e48ef5c14766f3601c97451b47859fddcbe7f237e1c5200cea8e7a7609d809
SHA512fea98a3d6fff1497551dc6583dd92798dcac764070a350fd381e856105a6411c94effd4b189b7a32608ff610422b8dbd6d93393c5da99ee66d4569d45191dc8b
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C:\Users\Admin\AppData\Local\Temp\pearpear81962580.vbsFilesize
171B
MD5a34267102c21aff46aecc85598924544
SHA177268af47c6a4b9c6be7f7487b2c9b233d49d435
SHA256eba7ab5c248e46dbe70470b41ebf25a378b4eff9ce632adff927ac1f95583d44
SHA5125d320312b93b46c9051a20c82d6405a3f2c78b23adb3ab3e71aad854b65b500937de7ca2986cf79967386d689beecccf676d89afde8ecc5d5ad0cb4ae2bf38a3
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C:\Users\Admin\AppData\Local\Temp\xfmnpne4.exeFilesize
124KB
MD5e898826598a138f86f2aa80c0830707a
SHA11e912a5671f7786cc077f83146a0484e5a78729c
SHA256df443ccf551470b3f9f7d92faf51b3b85ae206dd08da3b6390ce9a6039b7253a
SHA5126827068b8580822ded1fb8447bdb038d0e00633f5ef7f480a8cdeaab6928ac23022a0b7a925058e0926ce9b41a6c8c22a5692e074621b2fccdb7edd29a0d4cfb
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C:\Users\Admin\AppData\Roaming\Gongle\a9X7DA7Y4C\CURRENTFilesize
16B
MD546295cac801e5d4857d09837238a6394
SHA144e0fa1b517dbf802b18faf0785eeea6ac51594b
SHA2560f1bad70c7bd1e0a69562853ec529355462fcd0423263a3d39d6d0d70b780443
SHA5128969402593f927350e2ceb4b5bc2a277f3754697c1961e3d6237da322257fbab42909e1a742e22223447f3a4805f8d8ef525432a7c3515a549e984d3eff72b23
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C:\Users\Admin\AppData\Roaming\Gongle\a9X7DA7Y4C\LOGFilesize
329B
MD5183a4eb1c2316f6010adb87a1d3e4af6
SHA1564610220b51cfa42660540838a8dc3f97364a59
SHA256e1bc8de1555717295d2e29456da47df392fe9ced668b6cb0aa376b878825035d
SHA512e68f139c15e8e6eacf3c0d00ec71e0cdbde97448077cc55669e1a03ac88b3cb40900b79c2b1a1d81be49baac4bd808551fd2f90b03d4ce72e84c617ed5380eef
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C:\Users\Admin\AppData\Roaming\Gongle\a9X7DA7Y4C\LOG.oldFilesize
289B
MD5ddb1d72d415d5f660e22d3d649396afb
SHA1f485c94118cddc74352a50c7e9927362e96fd0a9
SHA2565acd71cda7b7af34f64c98b1c261d2e59c7d385546b0c62c54da0222ce49c0e9
SHA51251acad7828374ac19eb9a172065ee180d8318a5f04617e9c9bc41f6250158469676305af9b5a893d1c01f76734fe29a743eb29eacca49cc3c81233545b2f6d59
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C:\Users\Admin\AppData\Roaming\Gongle\a9X7DA7Y4C\MANIFEST-000001Filesize
41B
MD55af87dfd673ba2115e2fcf5cfdb727ab
SHA1d5b5bbf396dc291274584ef71f444f420b6056f1
SHA256f9d31b278e215eb0d0e9cd709edfa037e828f36214ab7906f612160fead4b2b4
SHA512de34583a7dbafe4dd0dc0601e8f6906b9bc6a00c56c9323561204f77abbc0dc9007c480ffe4092ff2f194d54616caf50aecbd4a1e9583cae0c76ad6dd7c2375b
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C:\Users\Admin\AppData\Roaming\Gongle\aLXD4UMJI3\n9vxbo99.default-release\storage\permanent\chrome\idb\3561288849sdhlie.sqliteFilesize
48KB
MD5ca56dde6b7630e54a594ceaabab91be0
SHA1dbc6640ed0d954002817b6654b4878b862635bfd
SHA256e230e836420c453056b412e21356e8a24a8cefcb67c185955cd16f5aba148d79
SHA5127533272799f6e4b8ccff8e5122c347ac61d885d98a0184e08f6f7ec12f8471bf73ed3f2d9baa2dda4484f9a33f3d16ece9817eec922d1afd9413e30b893f3e24
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memory/1788-42-0x000000000A5C0000-0x000000000A5CA000-memory.dmpFilesize
40KB
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memory/1788-44-0x0000000008D80000-0x0000000008D88000-memory.dmpFilesize
32KB
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memory/1788-10-0x000000000B060000-0x000000000BC60000-memory.dmpFilesize
12.0MB
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memory/1788-6-0x0000000075000000-0x00000000757B0000-memory.dmpFilesize
7.7MB
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memory/1788-1-0x00000000007A0000-0x00000000007AA000-memory.dmpFilesize
40KB
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memory/1788-2-0x00000000052C0000-0x00000000052DA000-memory.dmpFilesize
104KB
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memory/1788-3-0x0000000002C20000-0x0000000002C2A000-memory.dmpFilesize
40KB
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memory/1788-4-0x0000000005410000-0x00000000054A2000-memory.dmpFilesize
584KB
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memory/1788-5-0x0000000005A60000-0x0000000006004000-memory.dmpFilesize
5.6MB
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memory/1788-37-0x0000000007CB0000-0x0000000007CC2000-memory.dmpFilesize
72KB
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memory/1788-38-0x000000007500E000-0x000000007500F000-memory.dmpFilesize
4KB
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memory/1788-39-0x0000000075000000-0x00000000757B0000-memory.dmpFilesize
7.7MB
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memory/1788-40-0x0000000008110000-0x0000000008176000-memory.dmpFilesize
408KB
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memory/1788-0-0x000000007500E000-0x000000007500F000-memory.dmpFilesize
4KB
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memory/1788-41-0x00000000081D0000-0x00000000081DA000-memory.dmpFilesize
40KB
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memory/1788-43-0x0000000008D60000-0x0000000008D6C000-memory.dmpFilesize
48KB
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memory/1788-11-0x0000000011DF0000-0x0000000012A92000-memory.dmpFilesize
12.6MB
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memory/3424-31-0x0000000000F90000-0x0000000000F98000-memory.dmpFilesize
32KB
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memory/3424-30-0x0000000000F90000-0x0000000000F98000-memory.dmpFilesize
32KB
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memory/3424-28-0x0000000000F90000-0x0000000000F98000-memory.dmpFilesize
32KB
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memory/3424-27-0x0000000003100000-0x0000000003101000-memory.dmpFilesize
4KB
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memory/3424-26-0x0000000000F90000-0x0000000000F98000-memory.dmpFilesize
32KB