c53b524f93bfc772458bb3d17872e519e9d281ec38df764c1f241a982d1046de

General

Target

c53b524f93bfc772458bb3d17872e519e9d281ec38df764c1f241a982d1046deN.exe
Size

369KB
MD5

b64fbc7362b68978ae5d4206e857e7f0
SHA1

ca11f7b8ab7aaf479c5580af7ce2d2c8658c12c8
SHA256

c53b524f93bfc772458bb3d17872e519e9d281ec38df764c1f241a982d1046de
SHA512

260d5d9b47f3521ee55ec316e110193265f28400e15bbf15b4387c17ed89de3a319fbc9c64cbc73be8dabf37b117d1d804dc2d5ee6a3f81088f290f66962904c
SSDEEP

6144:ztvBPnU1b7e9SQii1EkoNlhlrQ2ZrM2xDM5z51PhPHdwLFM484Lm7Sq:Zv1nWdQP1EDhZPxDM5z5vOBLS7Sq

Score

7^/10

discovery persistence spyware stealer

Malware Config

Signatures

Checks computer location settings 2 TTPs 1 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-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	c53b524f93bfc772458bb3d17872e519e9d281ec38df764c1f241a982d1046deN.exe

Executes dropped EXE 2 IoCs

pid	Process
4928	Isass.exe
1696	XP_c53b524f93bfc772458bb3d17872e519e9d281ec38df764c1f241a982d1046deN.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\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Program Files (x86)\\Microsoft Build\\Isass.exe"	c53b524f93bfc772458bb3d17872e519e9d281ec38df764c1f241a982d1046deN.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Program Files (x86)\\Microsoft Build\\Isass.exe"	c53b524f93bfc772458bb3d17872e519e9d281ec38df764c1f241a982d1046deN.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Microsoft Build\Isass.exe	c53b524f93bfc772458bb3d17872e519e9d281ec38df764c1f241a982d1046deN.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c53b524f93bfc772458bb3d17872e519e9d281ec38df764c1f241a982d1046deN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Isass.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3828	c53b524f93bfc772458bb3d17872e519e9d281ec38df764c1f241a982d1046deN.exe
3828	c53b524f93bfc772458bb3d17872e519e9d281ec38df764c1f241a982d1046deN.exe
4928	Isass.exe
4928	Isass.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3828 wrote to memory of 4928	3828	c53b524f93bfc772458bb3d17872e519e9d281ec38df764c1f241a982d1046deN.exe	83
PID 3828 wrote to memory of 4928	3828	c53b524f93bfc772458bb3d17872e519e9d281ec38df764c1f241a982d1046deN.exe	83
PID 3828 wrote to memory of 4928	3828	c53b524f93bfc772458bb3d17872e519e9d281ec38df764c1f241a982d1046deN.exe	83
PID 3828 wrote to memory of 1696	3828	c53b524f93bfc772458bb3d17872e519e9d281ec38df764c1f241a982d1046deN.exe	84
PID 3828 wrote to memory of 1696	3828	c53b524f93bfc772458bb3d17872e519e9d281ec38df764c1f241a982d1046deN.exe	84

C:\Users\Admin\AppData\Local\Temp\c53b524f93bfc772458bb3d17872e519e9d281ec38df764c1f241a982d1046deN.exe
"C:\Users\Admin\AppData\Local\Temp\c53b524f93bfc772458bb3d17872e519e9d281ec38df764c1f241a982d1046deN.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3828
- C:\Program Files (x86)\Microsoft Build\Isass.exe
  "C:\Program Files (x86)\Microsoft Build\Isass.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:4928
- C:\Users\Admin\AppData\Local\Temp\XP_c53b524f93bfc772458bb3d17872e519e9d281ec38df764c1f241a982d1046deN.exe
  "C:\Users\Admin\AppData\Local\Temp\XP_c53b524f93bfc772458bb3d17872e519e9d281ec38df764c1f241a982d1046deN.exe"
  2⤵
  - Executes dropped EXE
  PID:1696

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files (x86)\Microsoft Build\Isass.exe

Filesize
213KB

MD5
61e49c2f3d433842e7a23bb69d55d866

SHA1
5e805e4e9550fd3d93f6a052f2db58a1b521b208

SHA256
3f35ac321848d4c2ae583d715d61ba6f34e40e46b62096b332b62f2ce8178fb3

SHA512
e0229e17d70486c446cdb50318cb27ae4f99eb464ee92c2fc0c3e33e54844c6dd13917d67336f7b52e31378764c0f317df1cfe0fbd1a1eec76fa3fb50b94f1c3

Download Submit
C:\ProgramData\Microsoft\ClickToRun\{9AC08E99-230B-47e8-9721-4577B7F124EA}\integrator.exe

Filesize
6.8MB

MD5
90f16d965fabe2c0f0896f1822142936

SHA1
2db3233f729d323065c7a332fc314c7801ac6e00

SHA256
2ddf573635ba114400d953a5042b6b821eb97e5175894161aca3e931a7620f33

SHA512
401a2b8910323f0085abd12adef3779fa430d280cc53fd6feb5ae1b151e8e3ffd595d7924e847fcdf050471d681d8b882ab1338c955712af716a95220a189b57

Download Submit
C:\Users\Admin\AppData\Local\Temp\XP_c53b524f93bfc772458bb3d17872e519e9d281ec38df764c1f241a982d1046deN.exe

Filesize
99KB

MD5
b7515e4664543b43461c2ecd7a5676dc

SHA1
f6fbcfe5b093fe9691b740684607bc31a9159935

SHA256
bf1b03022cadfc18049a7f0ecf1f3134c7676fcb6ff6c6941ae7f77e21285c73

SHA512
ac4c7098878ccfd2cc76451c071bfd992eecc49e9e8502545eada32aed4c28515dee5096e6dc6e61147e619a5f16ce4f364ebb98c2a78c0ee4b44b9517a872d1

Download Submit
C:\Users\Admin\AppData\Local\Temp\XP_c53b524f93bfc772458bb3d17872e519e9d281ec38df764c1f241a982d1046deN.exe

Filesize
213KB

MD5
8fa2bd5b1fe76dae8c502cab34802fe4

SHA1
e9c15d83d8ac536cdd23d2a31e6008aaaca4e37b

SHA256
63c50d8066e9b27a88bed96641c02632791d07abef150394e0308c29c0e9e751

SHA512
a6257797059f1af8df2895a46697df75c11e8334a80a45b9de15abc206d4da4508bbc71cbc3eaa9f3801ae1e7700f1e3f844c511b0c4b9196c9ac1d115284bfe

Download Submit
memory/3828-17-0x0000000001860000-0x0000000001861000-memory.dmp

Filesize
4KB

Download
memory/3828-3-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/3828-19-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4928-43-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4928-54-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4928-22-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4928-23-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4928-24-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4928-18-0x0000000001B60000-0x0000000001B61000-memory.dmp

Filesize
4KB

Download
memory/4928-20-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4928-21-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4928-6-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4928-85-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4928-86-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4928-87-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4928-88-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4928-116-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads