3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c

General

Target

3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe
Size

471KB
MD5

98b363683a8e60dcede60c2eb14f9db8
SHA1

e44529a588050299da729e52bbac63336c4b0feb
SHA256

3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c
SHA512

a36fc79a52300c82d0da5db8ad3f636deac0ad1512a96c1641e7bc00208c65575e65118cac53f06a4097d16af8bbdb42df94d43917ac02e92e7e3d2edac5c1a0
SSDEEP

6144:/rTfUHeeSKOS9ccFKk3Y9t9YZ7etKKAuq8QVlZsgC5AVmg1WTQp6:/n8yN0Mr8Z7LKxQVjs55AgzTQQ

Score

9^/10

persistence spyware stealer

Malware Config

Signatures

UPX dump on OEP (original entry point) 22 IoCs

Processes:

resource	yara_rule
C:\Users\Public\Microsoft Build\Isass.exe	UPX
behavioral1/memory/2084-8-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral1/memory/1852-15-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral1/memory/2084-18-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral1/memory/2480-19-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral1/memory/2600-22-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral1/memory/2780-28-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral1/memory/1852-32-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral1/memory/1852-33-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral1/memory/1852-36-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral1/memory/1852-37-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral1/memory/1852-44-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral1/memory/1852-45-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral1/memory/1852-53-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral1/memory/1852-54-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral1/memory/1852-60-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral1/memory/1852-61-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral1/memory/1852-73-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral1/memory/1852-74-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral1/memory/1852-82-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral1/memory/1852-83-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX
behavioral1/memory/1852-95-0x0000000000400000-0x00000000016A8E52-memory.dmp	UPX

Executes dropped EXE 5 IoCs

Processes:

Isass.exeIsass.exeIsass.exe3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe

pid process

1852 Isass.exe
2480 Isass.exe
2780 Isass.exe
1208 3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe
1144

pid	process
1852	Isass.exe
2480	Isass.exe
2780	Isass.exe
1208	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe
1144

Loads dropped DLL 9 IoCs

Processes:

3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exeIsass.exeIsass.exe

pid	process
2084	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe
2084	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe
2084	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe
2084	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe
2600	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe
2600	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe
2780	Isass.exe
1144
1852	Isass.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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000\Software\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Users\\Public\\Microsoft Build\\Isass.exe"	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Users\\Public\\Microsoft Build\\Isass.exe"	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exeIsass.exeIsass.exe3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exeIsass.exe

pid	process
2084	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe
1852	Isass.exe
2480	Isass.exe
2480	Isass.exe
2480	Isass.exe
2600	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe
2780	Isass.exe
2780	Isass.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exeIsass.exe3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exeIsass.exe

description	pid	process	target process
PID 2084 wrote to memory of 1852	2084	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe	Isass.exe
PID 2084 wrote to memory of 1852	2084	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe	Isass.exe
PID 2084 wrote to memory of 1852	2084	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe	Isass.exe
PID 2084 wrote to memory of 1852	2084	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe	Isass.exe
PID 2084 wrote to memory of 2480	2084	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe	Isass.exe
PID 2084 wrote to memory of 2480	2084	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe	Isass.exe
PID 2084 wrote to memory of 2480	2084	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe	Isass.exe
PID 2084 wrote to memory of 2480	2084	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe	Isass.exe
PID 2480 wrote to memory of 2600	2480	Isass.exe	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe
PID 2480 wrote to memory of 2600	2480	Isass.exe	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe
PID 2480 wrote to memory of 2600	2480	Isass.exe	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe
PID 2480 wrote to memory of 2600	2480	Isass.exe	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe
PID 2600 wrote to memory of 2780	2600	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe	Isass.exe
PID 2600 wrote to memory of 2780	2600	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe	Isass.exe
PID 2600 wrote to memory of 2780	2600	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe	Isass.exe
PID 2600 wrote to memory of 2780	2600	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe	Isass.exe
PID 2780 wrote to memory of 1208	2780	Isass.exe	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe
PID 2780 wrote to memory of 1208	2780	Isass.exe	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe
PID 2780 wrote to memory of 1208	2780	Isass.exe	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe
PID 2780 wrote to memory of 1208	2780	Isass.exe	3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe

C:\Users\Admin\AppData\Local\Temp\3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe
"C:\Users\Admin\AppData\Local\Temp\3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2084

C:\Users\Public\Microsoft Build\Isass.exe
"C:\Users\Public\Microsoft Build\Isass.exe"
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
PID:1852

C:\Users\Public\Microsoft Build\Isass.exe
"C:\Users\Public\Microsoft Build\Isass.exe" Tablet C:\Users\Admin\AppData\Local\Temp\3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe
2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2480

C:\Users\Admin\AppData\Local\Temp\3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe
"C:\Users\Admin\AppData\Local\Temp\3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe"
3⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2600

C:\Users\Public\Microsoft Build\Isass.exe
"C:\Users\Public\Microsoft Build\Isass.exe" Tablet C:\Users\Admin\AppData\Local\Temp\3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe
4⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2780

C:\Users\Admin\AppData\Local\Temp\3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe
"C:\Users\Admin\AppData\Local\Temp\3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe"
5⤵
- Executes dropped EXE
PID:1208

MITRE ATT&CK Matrix ATT&CK v13

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\3d6f3f108a62faec1933572673d5fa5d765fab938ad3e90e5054c682a484138c.exe
Filesize
250KB

MD5
9386c7ffb682c69eadb492071138f495

SHA1
cd4cda7c97645a9ce694f9543b989e5fb898bbe7

SHA256
a4c297fc0b96651ebb71b15398025f80d1f6f592330792ba3eb01d9cd56f9f99

SHA512
9b7c2ee269d6f6f33f8656d9e3958036b441246304dce499e9ada4c7dc844a8d4b42deafc5e1d25dc50d069393f0ce9cdc5765a7ca7b3393511d1defba4f7d21

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

MD5
29bb7e7cca12ac73ec2b0e41b6c83779

SHA1
0c88182bf3f8f613943c9c7bf7456fbf7167efaf

SHA256
248278293dcf1bb593e80f8623561fca82982284c23ffc856b6fcd0f1d014654

SHA512
19440174d2dc12433ccc949cd050eb3fa8dae11cb764fa3ddd53bf3069a0ee738cba584181fd12db42724ebfb4bfa7795aff8a01062c4077527278549dd58190

Download Submit
memory/1852-54-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/1852-32-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/1852-15-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/1852-17-0x00000000003B0000-0x00000000003B1000-memory.dmp

Filesize
4KB

Download
memory/1852-33-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/1852-83-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/1852-36-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/1852-74-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/1852-73-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/1852-60-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/1852-95-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/1852-82-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/1852-45-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/1852-44-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/1852-37-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/1852-53-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/1852-61-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2084-8-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2084-16-0x0000000004BB0000-0x0000000005E59000-memory.dmp

Filesize
18.7MB

Download
memory/2084-13-0x00000000044B0000-0x0000000005759000-memory.dmp

Filesize
18.7MB

Download
memory/2084-18-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2480-19-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2600-22-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2780-28-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads