Analysis Overview
SHA256
9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253
Threat Level: Shows suspicious behavior
The file 9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253 was found to be: Shows suspicious behavior.
Malicious Activity Summary
Executes dropped EXE
Loads dropped DLL
Checks computer location settings
Adds Run key to start application
Drops file in Program Files directory
Enumerates physical storage devices
Program crash
Unsigned PE
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-06 23:50
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-04-06 23:50
Reported
2024-04-06 23:53
Platform
win7-20240221-en
Max time kernel
131s
Max time network
135s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files (x86)\Microsoft Build\Isass.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\YU_9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe | N/A |
| N/A | N/A | N/A | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Program Files (x86)\\Microsoft Build\\Isass.exe" | C:\Users\Admin\AppData\Local\Temp\9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Program Files (x86)\\Microsoft Build\\Isass.exe" | C:\Users\Admin\AppData\Local\Temp\9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | C:\Program Files (x86)\Microsoft Build\Isass.exe | C:\Users\Admin\AppData\Local\Temp\9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe | N/A |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe | N/A |
| N/A | N/A | C:\Program Files (x86)\Microsoft Build\Isass.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe
"C:\Users\Admin\AppData\Local\Temp\9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe"
C:\Program Files (x86)\Microsoft Build\Isass.exe
"C:\Program Files (x86)\Microsoft Build\Isass.exe"
C:\Users\Admin\AppData\Local\Temp\YU_9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe
"C:\Users\Admin\AppData\Local\Temp\YU_9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe"
Network
Files
C:\Program Files (x86)\Microsoft Build\Isass.exe
| MD5 | f0c9b574e6942295caa7e76f4c09ebd6 |
| SHA1 | 8f11d5daaadd0ec583c206b2b53cebd1fb5f1ed3 |
| SHA256 | 1d49700b72a1dd6c3cc74221a2421066dfc1703e3a8749e37c00bde98fcacea7 |
| SHA512 | b8e86ca1be479c6a9ef35b331f53c6a0fa1350065c9ab9ac3236d22f53a37383f1b0ad73b23b59259837dda4a3b701450da1ab958319e7974cc371f546c3a972 |
memory/1688-9-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/1688-11-0x0000000003EF0000-0x0000000005197000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\YU_9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe
| MD5 | d2778164ef643ba8f44cc202ec7ef157 |
| SHA1 | 31eee7114eed6b0d2fb77c9f3605057639050786 |
| SHA256 | 28b001bb9a72ae7a24242bfab248d767a1ac5dec981c672a3944f7a072375e9a |
| SHA512 | cb2a5a2aeba9d6f6bfc4a3a4576961244c109aafb59f02134b03ebac4d16602ee7f141cc4adc519f15030c20e7e7d6585778870706b2ea4c74c1161729101635 |
memory/1688-20-0x0000000003EF0000-0x0000000005197000-memory.dmp
memory/2224-22-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/2224-23-0x0000000000220000-0x0000000000221000-memory.dmp
memory/1688-24-0x0000000000260000-0x0000000000261000-memory.dmp
memory/1688-18-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/2224-25-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/2224-26-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/2224-27-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/2224-28-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/2224-29-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/2224-30-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/2224-31-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/2224-32-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/2224-33-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/2224-34-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/2224-35-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/2224-36-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/2224-37-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/2224-38-0x0000000000400000-0x00000000016A7000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-06 23:50
Reported
2024-04-06 23:53
Platform
win10v2004-20240226-en
Max time kernel
145s
Max time network
147s
Command Line
Signatures
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files (x86)\Microsoft Build\Isass.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\TC_9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Program Files (x86)\\Microsoft Build\\Isass.exe" | C:\Users\Admin\AppData\Local\Temp\9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3270530367-132075249-2153716227-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Program Files (x86)\\Microsoft Build\\Isass.exe" | C:\Users\Admin\AppData\Local\Temp\9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | C:\Program Files (x86)\Microsoft Build\Isass.exe | C:\Users\Admin\AppData\Local\Temp\9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe | N/A |
Enumerates physical storage devices
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Program Files (x86)\Microsoft Build\Isass.exe |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe | N/A |
| N/A | N/A | C:\Program Files (x86)\Microsoft Build\Isass.exe | N/A |
| N/A | N/A | C:\Program Files (x86)\Microsoft Build\Isass.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe
"C:\Users\Admin\AppData\Local\Temp\9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe"
C:\Program Files (x86)\Microsoft Build\Isass.exe
"C:\Program Files (x86)\Microsoft Build\Isass.exe"
C:\Users\Admin\AppData\Local\Temp\TC_9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe
"C:\Users\Admin\AppData\Local\Temp\TC_9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe"
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 4364 -ip 4364
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4364 -s 960
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 149.220.183.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 145.83.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 69.31.126.40.in-addr.arpa | udp |
| US | 20.231.121.79:80 | tcp | |
| US | 8.8.8.8:53 | 209.205.72.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 134.71.91.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.204.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 10.173.189.20.in-addr.arpa | udp |
Files
C:\Program Files (x86)\Microsoft Build\Isass.exe
| MD5 | f0c9b574e6942295caa7e76f4c09ebd6 |
| SHA1 | 8f11d5daaadd0ec583c206b2b53cebd1fb5f1ed3 |
| SHA256 | 1d49700b72a1dd6c3cc74221a2421066dfc1703e3a8749e37c00bde98fcacea7 |
| SHA512 | b8e86ca1be479c6a9ef35b331f53c6a0fa1350065c9ab9ac3236d22f53a37383f1b0ad73b23b59259837dda4a3b701450da1ab958319e7974cc371f546c3a972 |
memory/3016-4-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/4364-6-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/3016-8-0x00000000019B0000-0x00000000019B1000-memory.dmp
memory/4364-7-0x0000000001970000-0x0000000001971000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\TC_9fa5e39ec2434bcac72dc6212f3900c8458050e8ac636f4a92f61134d97ea253.exe
| MD5 | d2778164ef643ba8f44cc202ec7ef157 |
| SHA1 | 31eee7114eed6b0d2fb77c9f3605057639050786 |
| SHA256 | 28b001bb9a72ae7a24242bfab248d767a1ac5dec981c672a3944f7a072375e9a |
| SHA512 | cb2a5a2aeba9d6f6bfc4a3a4576961244c109aafb59f02134b03ebac4d16602ee7f141cc4adc519f15030c20e7e7d6585778870706b2ea4c74c1161729101635 |
memory/3016-15-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/4364-17-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/4364-20-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/4364-21-0x0000000000400000-0x00000000016A7000-memory.dmp
C:\ProgramData\Adobe\Setup\{AC76BA86-7AD7-1033-7B44-AC0F074E4100}\setup.exe
| MD5 | 45028d9f66ca0986419d4f91cd2b1c6b |
| SHA1 | df1e8de4e74f74b96eba1cd0c52e0c66be81de46 |
| SHA256 | 274d180a46df20c7809c94a4e5182ee992a37fe82fbacbe697f7b9a6d4febc5b |
| SHA512 | 77da5107d442b92b05bf3029132e60f1cd36f14db61b95257123c8879e12b0ad939208abe981c19c52586642912ecb088cc1e62067f524506269dd3c082a77b0 |
memory/4364-30-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/4364-31-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/4364-32-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/4364-38-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/4364-49-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/4364-60-0x0000000000400000-0x00000000016A7000-memory.dmp
memory/4364-61-0x0000000000400000-0x00000000016A7000-memory.dmp