706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93

General

Target

706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe
Size

479KB
MD5

6807f2e692f91e23e09af0ba65001ea7
SHA1

ed68648edfa4e2349ae845670a2ad70d47c494a8
SHA256

706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93
SHA512

b3009c79bde49c080813b5006dfbde7e63c893eba0bcc745c2ce2a19981305dc36f7a82c3fee2c17bf12e5d1ed003f4a46c74ca4945a10393d77348e3e8b06e3
SSDEEP

6144:/rTfUHeeSKOS9ccFKk3Y9t9YZGXPwwWJvcvp7lszsmAgFV:/n8yN0Mr8Z1JJqp7lsAcFV

Score

9^/10

persistence spyware stealer

Malware Config

Signatures

UPX dump on OEP (original entry point) 25 IoCs

Processes:

resource	yara_rule
C:\Users\Public\Microsoft Build\Isass.exe	UPX
behavioral2/memory/4372-4-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral2/memory/4372-6-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral2/memory/116-7-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral2/memory/3152-9-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral2/memory/3152-10-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral2/memory/1100-13-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral2/memory/4004-15-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral2/memory/4004-25-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral2/memory/116-26-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral2/memory/116-29-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral2/memory/1100-31-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral2/memory/116-32-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Microsoft\OneDrive\18.151.0729.0013\FileCoAuth.exe	UPX
behavioral2/memory/116-36-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral2/memory/116-37-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral2/memory/116-45-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral2/memory/116-46-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral2/memory/116-52-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral2/memory/116-53-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral2/memory/116-61-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral2/memory/116-65-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral2/memory/116-76-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral2/memory/116-77-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral2/memory/116-86-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX

Checks computer location settings 2 TTPs 4 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exeIsass.exe706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exeIsass.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-17203666-93769886-2545153620-1000\Control Panel\International\Geo\Nation	706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe
Key value queried	\REGISTRY\USER\S-1-5-21-17203666-93769886-2545153620-1000\Control Panel\International\Geo\Nation	Isass.exe
Key value queried	\REGISTRY\USER\S-1-5-21-17203666-93769886-2545153620-1000\Control Panel\International\Geo\Nation	706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe
Key value queried	\REGISTRY\USER\S-1-5-21-17203666-93769886-2545153620-1000\Control Panel\International\Geo\Nation	Isass.exe

Executes dropped EXE 4 IoCs

Processes:

Isass.exeIsass.exeIsass.exe706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe

pid process

116 Isass.exe
3152 Isass.exe
4004 Isass.exe
1568 706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

pid	process
116	Isass.exe
3152	Isass.exe
4004	Isass.exe
1568	706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Users\\Public\\Microsoft Build\\Isass.exe"	706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-17203666-93769886-2545153620-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Users\\Public\\Microsoft Build\\Isass.exe"	706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 16 IoCs

Processes:

706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exeIsass.exeIsass.exe706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exeIsass.exe

pid	process
4372	706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe
4372	706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe
116	Isass.exe
116	Isass.exe
3152	Isass.exe
3152	Isass.exe
3152	Isass.exe
3152	Isass.exe
3152	Isass.exe
3152	Isass.exe
1100	706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe
1100	706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe
4004	Isass.exe
4004	Isass.exe
4004	Isass.exe
4004	Isass.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exeIsass.exe706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exeIsass.exe

description	pid	process	target process
PID 4372 wrote to memory of 116	4372	706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe	Isass.exe
PID 4372 wrote to memory of 116	4372	706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe	Isass.exe
PID 4372 wrote to memory of 116	4372	706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe	Isass.exe
PID 4372 wrote to memory of 3152	4372	706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe	Isass.exe
PID 4372 wrote to memory of 3152	4372	706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe	Isass.exe
PID 4372 wrote to memory of 3152	4372	706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe	Isass.exe
PID 3152 wrote to memory of 1100	3152	Isass.exe	706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe
PID 3152 wrote to memory of 1100	3152	Isass.exe	706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe
PID 3152 wrote to memory of 1100	3152	Isass.exe	706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe
PID 1100 wrote to memory of 4004	1100	706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe	Isass.exe
PID 1100 wrote to memory of 4004	1100	706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe	Isass.exe
PID 1100 wrote to memory of 4004	1100	706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe	Isass.exe
PID 4004 wrote to memory of 1568	4004	Isass.exe	706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe
PID 4004 wrote to memory of 1568	4004	Isass.exe	706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe
PID 4004 wrote to memory of 1568	4004	Isass.exe	706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe

C:\Users\Admin\AppData\Local\Temp\706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe
"C:\Users\Admin\AppData\Local\Temp\706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4372

C:\Users\Public\Microsoft Build\Isass.exe
"C:\Users\Public\Microsoft Build\Isass.exe"
2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:116

C:\Users\Public\Microsoft Build\Isass.exe
"C:\Users\Public\Microsoft Build\Isass.exe" Tablet C:\Users\Admin\AppData\Local\Temp\706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe
2⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3152

C:\Users\Admin\AppData\Local\Temp\706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe
"C:\Users\Admin\AppData\Local\Temp\706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe"
3⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1100

C:\Users\Public\Microsoft Build\Isass.exe
"C:\Users\Public\Microsoft Build\Isass.exe" Tablet C:\Users\Admin\AppData\Local\Temp\706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe
4⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4004

C:\Users\Admin\AppData\Local\Temp\706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe
"C:\Users\Admin\AppData\Local\Temp\706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe"
5⤵
- Executes dropped EXE
PID:1568

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\OneDrive\18.151.0729.0013\FileCoAuth.exe
Filesize
737KB

MD5
30c803dbd046955e593ac4054822f2ae

SHA1
8cb37718e16215d48ec7e5bc2a4036d4730c8142

SHA256
bf8a86ee12fb1ba9da06ec80a759666296d3f615f38a76680a9c79038d22c62e

SHA512
2c1874bba54fe72b94fa43f54b8ad6d8ec5284babb5a4a05c703e49bd9bf8d89386dc6dbce7f8eab5a12fa463128c79985366f7f5938d3740e9ce35cdd4b39a7

Download Submit
C:\Users\Admin\AppData\Local\Temp\706cb4bb64aeec95039396bfd24354a47b70a76ea35c28605f809753768b6f93.exe
Filesize
231KB

MD5
6f581a41167d2d484fcba20e6fc3c39a

SHA1
d48de48d24101b9baaa24f674066577e38e6b75c

SHA256
3eb8d53778eab9fb13b4c97aeab56e4bad2a6ea3748d342f22eaf4d7aa3185a7

SHA512
e1177b6cea89445d58307b3327c78909adff225497f9abb8de571cdd114b547a8f515ec3ab038b583bf752a085b231f6329d6ca82fbe6be8a58cd97a1dbaf0f6

Download Submit
C:\Users\Public\Microsoft Build\Isass.exe
Filesize
216KB

MD5
a3ad4bb8992ece993d8c09ee10415f5b

SHA1
cf45b42df1234f09ef9a0e512d49dcd8d753f7b2

SHA256
ac4577a14de2d0783f2c4aa3aa1992c6a8081c0b2a2358e0ad2aaaf079041e68

SHA512
bfde1ff931c91392db6dc0a84c0b2cc47e695ae5fbb507615f37c02acdf0efe890e283ed7a8818ec352d7ba5b6946e5f31b2f5ecd2d2f41cd2ef3698dd395dd2

Download Submit
memory/116-61-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/116-53-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/116-76-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/116-65-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/116-8-0x0000000001B60000-0x0000000001B61000-memory.dmp

Filesize
4KB

Download
memory/116-45-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/116-77-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/116-7-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/116-26-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/116-29-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/116-52-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/116-46-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/116-32-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/116-86-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/116-36-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/116-37-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/1100-13-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/1100-31-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/3152-30-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/3152-10-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/3152-9-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/4004-25-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/4004-15-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/4372-6-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/4372-4-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads