b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c

General

Target

b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe
Size

869KB
MD5

52301e2e4f83bc459f2a1fc537000853
SHA1

d32fd82310fdb782a2ae0c6a7b5cb87ee779bb08
SHA256

b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c
SHA512

8f157f9814b9d48d9455545d9a27e2009f28080d12ecb140b00a47f508c3bd94ed8a93f2a2fe2e22a1b46a558c345fc5e85b1c2ed80d5d5672c4f00f6d70073e
SSDEEP

12288:/n8yN0Mr8ZL6aVs7IypwXK4Qzh+jMlWCEh/yr5QE00vZ5McAA9YlO3d:vPuZLzIfpwiz0wy/ylQd0ccdYlO3d

Score

7^/10

discovery persistence spyware stealer

Malware Config

Signatures

Checks computer location settings 2 TTPs 6 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	Isass.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	Isass.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	Isass.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe

Executes dropped EXE 6 IoCs

pid	Process
2528	Isass.exe
1232	Isass.exe
232	Isass.exe
524	Isass.exe
2532	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe
3356	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe

Loads dropped DLL 1 IoCs

pid	Process
3356	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.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

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Users\\Public\\Microsoft Build\\Isass.exe"	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Users\\Public\\Microsoft Build\\Isass.exe"	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
784	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe
784	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe
2528	Isass.exe
2528	Isass.exe
1232	Isass.exe
1232	Isass.exe
1232	Isass.exe
1232	Isass.exe
1232	Isass.exe
1232	Isass.exe
2240	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe
2240	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe
232	Isass.exe
232	Isass.exe
232	Isass.exe
232	Isass.exe
232	Isass.exe
232	Isass.exe
2628	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe
2628	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe
524	Isass.exe
524	Isass.exe
524	Isass.exe
524	Isass.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 784 wrote to memory of 2528	784	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe	90
PID 784 wrote to memory of 2528	784	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe	90
PID 784 wrote to memory of 2528	784	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe	90
PID 784 wrote to memory of 1232	784	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe	93
PID 784 wrote to memory of 1232	784	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe	93
PID 784 wrote to memory of 1232	784	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe	93
PID 1232 wrote to memory of 2240	1232	Isass.exe	95
PID 1232 wrote to memory of 2240	1232	Isass.exe	95
PID 1232 wrote to memory of 2240	1232	Isass.exe	95
PID 2240 wrote to memory of 232	2240	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe	96
PID 2240 wrote to memory of 232	2240	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe	96
PID 2240 wrote to memory of 232	2240	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe	96
PID 232 wrote to memory of 2628	232	Isass.exe	97
PID 232 wrote to memory of 2628	232	Isass.exe	97
PID 232 wrote to memory of 2628	232	Isass.exe	97
PID 2628 wrote to memory of 524	2628	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe	99
PID 2628 wrote to memory of 524	2628	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe	99
PID 2628 wrote to memory of 524	2628	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe	99
PID 524 wrote to memory of 2532	524	Isass.exe	100
PID 524 wrote to memory of 2532	524	Isass.exe	100
PID 524 wrote to memory of 2532	524	Isass.exe	100
PID 2532 wrote to memory of 3356	2532	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe	101
PID 2532 wrote to memory of 3356	2532	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe	101
PID 2532 wrote to memory of 3356	2532	b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe	101

C:\Users\Admin\AppData\Local\Temp\b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe
"C:\Users\Admin\AppData\Local\Temp\b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:784
- C:\Users\Public\Microsoft Build\Isass.exe
  "C:\Users\Public\Microsoft Build\Isass.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  PID:2528
- C:\Users\Public\Microsoft Build\Isass.exe
  "C:\Users\Public\Microsoft Build\Isass.exe" Tablet C:\Users\Admin\AppData\Local\Temp\b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1232
- - C:\Users\Admin\AppData\Local\Temp\b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe
    "C:\Users\Admin\AppData\Local\Temp\b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe"
    3⤵
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:2240
  - - C:\Users\Public\Microsoft Build\Isass.exe
      "C:\Users\Public\Microsoft Build\Isass.exe" Tablet C:\Users\Admin\AppData\Local\Temp\b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of WriteProcessMemory
      PID:232
    - - C:\Users\Admin\AppData\Local\Temp\b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe
        
        "C:\Users\Admin\AppData\Local\Temp\b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe"
        5⤵
        Checks computer location settings
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of WriteProcessMemory
        
        PID:2628
      - C:\Users\Public\Microsoft Build\Isass.exe
        
        "C:\Users\Public\Microsoft Build\Isass.exe" Tablet C:\Users\Admin\AppData\Local\Temp\b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe
        6⤵
        Checks computer location settings
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of WriteProcessMemory
        
        PID:524
        
        C:\Users\Admin\AppData\Local\Temp\b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe
        
        "C:\Users\Admin\AppData\Local\Temp\b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe"
        7⤵
        Executes dropped EXE
        Suspicious use of WriteProcessMemory
        
        PID:2532
        
        C:\Windows\Temp\{9CFDEF5A-0BF1-4602-9537-639AD575FDF9}\.cr\b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe
        
        "C:\Windows\Temp\{9CFDEF5A-0BF1-4602-9537-639AD575FDF9}\.cr\b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe" -burn.clean.room="C:\Users\Admin\AppData\Local\Temp\b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe" -burn.filehandle.attached=540 -burn.filehandle.self=648
        8⤵
        Executes dropped EXE
        Loads dropped DLL
        
        PID:3356

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 --mojo-platform-channel-handle=1352 --field-trial-handle=2280,i,716736634476467098,11449718822158202904,262144 --variations-seed-version /prefetch:8
1⤵
PID:2440

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\b6d4f162f5ae5e393b38a7b4530a148f667fefe09ba6eca65ffef29c0af1b47c.exe

Filesize
632KB

MD5
c27046bd35c5717084bb40c7305b941a

SHA1
51510a7753dd2a1236b34b495db21ef18a74c25c

SHA256
e0bc82c13bcd1ade084a0421dab88e23e9cc5499323449e585e7dd2116951bd3

SHA512
df9dc98043ea5b86c671e769a75e569366223c5a291f5eed22f68af9783a0aa295d8bb0ee0b510767cce7961f2e501124d9fe656044766644e18682f21446214

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

Filesize
216KB

MD5
4e3da62191c139e87d1f71984d949fce

SHA1
5c8b28ea57a97cbb166e4fbcc141844aad5f253f

SHA256
d01f00c25d0328aa0d4bfa21af570f1697a725f23cf7d3cbfb4fef6183bc42bc

SHA512
7ca61e187b25fb9afce445e4952091f1248d6e68ff08c1d00d32a9c681f653d4100628ab31c23285e85d2f0daaa523f47f8ca4d3ac4f18d2224ceec999a63b9e

Download Submit
C:\Windows\Temp\{EA55A5A0-B13E-4925-A179-0103A88A7694}\.ba\logo.png

Filesize
1KB

MD5
d6bd210f227442b3362493d046cea233

SHA1
ff286ac8370fc655aea0ef35e9cf0bfcb6d698de

SHA256
335a256d4779ec5dcf283d007fb56fd8211bbcaf47dcd70fe60ded6a112744ef

SHA512
464aaab9e08de610ad34b97d4076e92dc04c2cdc6669f60bfc50f0f9ce5d71c31b8943bd84cee1a04fb9ab5bbed3442bd41d9cb21a0dd170ea97c463e1ce2b5b

Download Submit
C:\Windows\Temp\{EA55A5A0-B13E-4925-A179-0103A88A7694}\.ba\wixstdba.dll

Filesize
191KB

MD5
eab9caf4277829abdf6223ec1efa0edd

SHA1
74862ecf349a9bedd32699f2a7a4e00b4727543d

SHA256
a4efbdb2ce55788ffe92a244cb775efd475526ef5b61ad78de2bcdfaddac7041

SHA512
45b15ade68e0a90ea7300aeb6dca9bc9e347a63dba5ce72a635957564d1bdf0b1584a5e34191916498850fc7b3b7ecfbcbfcb246b39dbf59d47f66bc825c6fd2

Download Submit
C:\odt\office2016setup.exe

Filesize
5.3MB

MD5
030a8ae82177ea133b93d2a44c2faf84

SHA1
a42fcdbcdc459ba814389ebee1d004c864d68d2f

SHA256
7e431124facd06863cca6c2d6c8f5fcb44d541fc269ecbcd49cee8a5d364cb49

SHA512
61788f349b1115387b63d3fb7cfe9e52bee9a2585c065df4aaa7d439ece6739114604f1d2b7b90d08d3ee84b20afca88fec559f0fcce612fb20d9da0f433da71

Download Submit
memory/232-28-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/232-27-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/524-41-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/784-0-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/784-13-0x0000000003D50000-0x0000000003D51000-memory.dmp

Filesize
4KB

Download
memory/784-10-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/784-9-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/784-2-0x0000000003D50000-0x0000000003D51000-memory.dmp

Filesize
4KB

Download
memory/784-1-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/1232-20-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2240-24-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2240-26-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2528-11-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2528-100-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2528-15-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2528-79-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2528-14-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2528-8-0x0000000001F40000-0x0000000001F41000-memory.dmp

Filesize
4KB

Download
memory/2528-7-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2528-92-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2528-95-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2528-131-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2528-101-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2528-105-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2528-111-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2528-116-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2528-119-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2528-125-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download
memory/2628-30-0x0000000000400000-0x00000000016A8E52-memory.dmp

Filesize
18.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads