Analysis
- max time kernel
149s - max time network
100s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system - submitted
04/06/2024, 00:03
Static task
static1
2 signatures
Behavioral task
behavioral1
Sample
8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe
Resource
win7-20240508-en
9 signatures
150 seconds
Behavioral task
behavioral2
Sample
8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe
Resource
win10v2004-20240508-en
10 signatures
150 seconds
General
- Target 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe
- Size 879KB
- Sample240604-acfj3seh38
- SHA256 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51
- MD5 abbc082116627ebcf45b6741951bc5af
- SHA1 07b6680d8ee73b49773dc9345f440eb7b02b3c43
- SHA512 65d3a48068b5d6e97c759ff36a54972fa607c57b4425e20c9c465b05a419447dca8c8ae21fc0052166b14fbb30ad0dc320c949d64800debc385e9be696e05bef
- SSDEEP 24576:vPuZ2z0fDjymk4HM5yJdGACgPoufMhtzyx9pbVGmW2NwOVNRKYgWL8a7EleWVSS0:eCWDy4F/VQF0r
- MD5 SHA1 SHA512 SSDEEP
Score
9/10
Malware Config
Signatures
- UPX dump on OEP (original entry point) 28 IoCs
resource yara_rule behavioral2/files/0x00070000000233af-2.dat UPX behavioral2/memory/1524-4-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral2/memory/1964-5-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral2/memory/3240-10-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral2/memory/1524-11-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral2/memory/3240-13-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral2/memory/3956-15-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral2/memory/3956-16-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral2/memory/3948-18-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral2/memory/2180-20-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral2/memory/3100-21-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral2/memory/2820-23-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral2/memory/536-34-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral2/memory/1964-83-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral2/memory/1964-86-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral2/memory/1964-87-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral2/files/0x0001000000022759-88.dat UPX behavioral2/memory/1964-91-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral2/memory/1964-92-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral2/memory/1964-100-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral2/memory/1964-101-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral2/memory/1964-107-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral2/memory/1964-108-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral2/memory/1964-115-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral2/memory/1964-119-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral2/memory/1964-127-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral2/memory/1964-128-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX behavioral2/memory/1964-140-0x0000000000400000-0x00000000016A8E52-memory.dmp UPX - Checks computer location settings 2 TTPs 8 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe Key value queried \REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation Isass.exe Key value queried \REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe Key value queried \REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation Isass.exe Key value queried \REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe Key value queried \REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation Isass.exe Key value queried \REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe Key value queried \REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation Isass.exe - Executes dropped EXE 7 IoCs
pid Process 1964 Isass.exe 3240 Isass.exe 3948 Isass.exe 3100 Isass.exe 536 Isass.exe 640 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 5056 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe - Loads dropped DLL 1 IoCs
pid Process 5056 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe - Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Users\\Public\\Microsoft Build\\Isass.exe" 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Users\\Public\\Microsoft Build\\Isass.exe" 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe - Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious behavior: EnumeratesProcesses 32 IoCs
pid Process 1524 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 1524 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 1964 Isass.exe 1964 Isass.exe 3240 Isass.exe 3240 Isass.exe 3240 Isass.exe 3240 Isass.exe 3240 Isass.exe 3240 Isass.exe 3956 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 3956 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 3948 Isass.exe 3948 Isass.exe 3948 Isass.exe 3948 Isass.exe 3948 Isass.exe 3948 Isass.exe 2180 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 2180 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 3100 Isass.exe 3100 Isass.exe 3100 Isass.exe 3100 Isass.exe 3100 Isass.exe 3100 Isass.exe 2820 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 2820 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 536 Isass.exe 536 Isass.exe 536 Isass.exe 536 Isass.exe - Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 1524 wrote to memory of 1964 1524 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 82 PID 1524 wrote to memory of 1964 1524 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 82 PID 1524 wrote to memory of 1964 1524 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 82 PID 1524 wrote to memory of 3240 1524 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 83 PID 1524 wrote to memory of 3240 1524 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 83 PID 1524 wrote to memory of 3240 1524 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 83 PID 3240 wrote to memory of 3956 3240 Isass.exe 84 PID 3240 wrote to memory of 3956 3240 Isass.exe 84 PID 3240 wrote to memory of 3956 3240 Isass.exe 84 PID 3956 wrote to memory of 3948 3956 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 85 PID 3956 wrote to memory of 3948 3956 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 85 PID 3956 wrote to memory of 3948 3956 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 85 PID 3948 wrote to memory of 2180 3948 Isass.exe 86 PID 3948 wrote to memory of 2180 3948 Isass.exe 86 PID 3948 wrote to memory of 2180 3948 Isass.exe 86 PID 2180 wrote to memory of 3100 2180 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 87 PID 2180 wrote to memory of 3100 2180 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 87 PID 2180 wrote to memory of 3100 2180 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 87 PID 3100 wrote to memory of 2820 3100 Isass.exe 88 PID 3100 wrote to memory of 2820 3100 Isass.exe 88 PID 3100 wrote to memory of 2820 3100 Isass.exe 88 PID 2820 wrote to memory of 536 2820 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 89 PID 2820 wrote to memory of 536 2820 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 89 PID 2820 wrote to memory of 536 2820 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 89 PID 536 wrote to memory of 640 536 Isass.exe 90 PID 536 wrote to memory of 640 536 Isass.exe 90 PID 536 wrote to memory of 640 536 Isass.exe 90 PID 640 wrote to memory of 5056 640 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 91 PID 640 wrote to memory of 5056 640 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 91 PID 640 wrote to memory of 5056 640 8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe 91
Processes
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C:\Users\Admin\AppData\Local\Temp\8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe"C:\Users\Admin\AppData\Local\Temp\8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe"1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1524 -
C:\Users\Public\Microsoft Build\Isass.exe"C:\Users\Public\Microsoft Build\Isass.exe"2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:1964
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C:\Users\Public\Microsoft Build\Isass.exe"C:\Users\Public\Microsoft Build\Isass.exe" Tablet C:\Users\Admin\AppData\Local\Temp\8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe2⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3240 -
C:\Users\Admin\AppData\Local\Temp\8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe"C:\Users\Admin\AppData\Local\Temp\8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe"3⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3956 -
C:\Users\Public\Microsoft Build\Isass.exe"C:\Users\Public\Microsoft Build\Isass.exe" Tablet C:\Users\Admin\AppData\Local\Temp\8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe4⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3948 -
C:\Users\Admin\AppData\Local\Temp\8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe"C:\Users\Admin\AppData\Local\Temp\8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe"5⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2180 -
C:\Users\Public\Microsoft Build\Isass.exe"C:\Users\Public\Microsoft Build\Isass.exe" Tablet C:\Users\Admin\AppData\Local\Temp\8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe6⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3100 -
C:\Users\Admin\AppData\Local\Temp\8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe"C:\Users\Admin\AppData\Local\Temp\8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe"7⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2820 -
C:\Users\Public\Microsoft Build\Isass.exe"C:\Users\Public\Microsoft Build\Isass.exe" Tablet C:\Users\Admin\AppData\Local\Temp\8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe8⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:536 -
C:\Users\Admin\AppData\Local\Temp\8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe"C:\Users\Admin\AppData\Local\Temp\8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe"9⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:640 -
C:\Windows\Temp\{B8706458-F36B-4AB3-B967-F8949F5D8ED2}\.cr\8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe"C:\Windows\Temp\{B8706458-F36B-4AB3-B967-F8949F5D8ED2}\.cr\8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe" -burn.clean.room="C:\Users\Admin\AppData\Local\Temp\8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe" -burn.filehandle.attached=552 -burn.filehandle.self=54810⤵
- Executes dropped EXE
- Loads dropped DLL
PID:5056
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Microsoft\OneDrive\18.151.0729.0013\FileCoAuth.exe
- Size 685KB
- SHA256 7da8d1a79ae3939cdfee38b38482cc7bbaad581dbf6fb3943f35f705d0b11f3a
- MD5 0d3c892fd94228cc687176f74033e47d
- SHA1 e154f5c5a63a4bc965c925c6731d2092006e8d6c
- SHA512 c0058bbaa18fcbee97a3b5239e6ec56b2922bd854f6696a79d94bbca223a0b23a97c157dae89cd349d5cc3f94f8b847a8cf41d58c1ce91172c1b5ce35913bae9
- SSDEEP 12288:/n8yN0Mr8ZRIbhlMXgcWhOA/a1TSxjJiY:vPuZAhj0A/gTSxjJ1
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\Temp\8c7a76d35d78bd597a511e4a5ac0986107b948595a5aad9be889df506b9baf51.exe
- Size 635KB
- SHA256 ab1164dcaf6c7d7d4905881f332a7b6f854be46e36b860c44d9eedc96ab6607a
- MD5 b73be38096eddc4d427fbbfdd8cf15bd
- SHA1 534f605fd43cc7089e448e5fa1b1a2d56de14779
- SHA512 5af779926d344bc7c4140725f90cddad5eb778f5ca4856d5a31a6084424964d205638815eab4454e0ea34ea56fafca19fadd1eb2779dc6b7f277e4e4ce4b1603
- SSDEEP 12288:LnMwHskY7gjcjhVIEhqgM7bWvcsi6aVArIygU40vy3W/ceKSHMsiFyY6XNR:7MysZgjS1hqgSC/iz0fDjymk4HM5yJR
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Public\Microsoft Build\Isass.exe
- Size 216KB
- SHA256 da347f6169ee82f755889c1f0079ef2a70e16bb9aacd0147ce7e689bbb4166ca
- MD5 816a6d1102a1a3b4d6d9c3d8dfef7045
- SHA1 ee440bbc1be28b777f9109d1fd8e3c5fe282e5b5
- SHA512 3ff95d1bd74302b4e58fe1d05403a584b6f6db87d61213968956a507635668d3ac1ee78494e6228c2b3ac7a530a9e474b4259ca88f1df2b404302cddb09a5e94
- SSDEEP 3072:SPUHpiKT2t2UHIu05W7SAFJJOUD9cckiKop97f3r8n9t9Ygntwc:/rTfUHeeSKOS9ccFKk3Y9t9YZc
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Windows\Temp\{3231E5C9-3C70-4667-B99D-3A696B572A70}\.ba\logo.png
- Size 1KB
- SHA256 335a256d4779ec5dcf283d007fb56fd8211bbcaf47dcd70fe60ded6a112744ef
- MD5 d6bd210f227442b3362493d046cea233
- SHA1 ff286ac8370fc655aea0ef35e9cf0bfcb6d698de
- SHA512 464aaab9e08de610ad34b97d4076e92dc04c2cdc6669f60bfc50f0f9ce5d71c31b8943bd84cee1a04fb9ab5bbed3442bd41d9cb21a0dd170ea97c463e1ce2b5b
- MD5 SHA1 SHA512
- Path C:\Windows\Temp\{3231E5C9-3C70-4667-B99D-3A696B572A70}\.ba\wixstdba.dll
- Size 191KB
- SHA256 a4efbdb2ce55788ffe92a244cb775efd475526ef5b61ad78de2bcdfaddac7041
- MD5 eab9caf4277829abdf6223ec1efa0edd
- SHA1 74862ecf349a9bedd32699f2a7a4e00b4727543d
- SHA512 45b15ade68e0a90ea7300aeb6dca9bc9e347a63dba5ce72a635957564d1bdf0b1584a5e34191916498850fc7b3b7ecfbcbfcb246b39dbf59d47f66bc825c6fd2
- SSDEEP 3072:OXoiFK6b0k77I+QfaIl191rSJHvlalB+8BHkY6v53EfcUzN0m6I+WxBlnKzeZuqt:OXoQNb++gDrSJdr8BHkPh3wIgnK/IU1a
- MD5 SHA1 SHA512 SSDEEP