lumma | 80384108010dffb5c0f2ad250925dc0fbe80a5e1dfc76fa8b2d1bcc9283bd091

Analysis

max time kernel
66s
max time network
68s
platform
windows11-21h2_x64
resource
win11-20241007-es
resource tags

arch:x64arch:x86image:win11-20241007-eslocale:es-esos:windows11-21h2-x64systemwindows
submitted
04/01/2025, 03:23

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General

Target

External2.4.exe
Size

3.7MB
MD5

0d59625aac6e72b533c252f60693ab01
SHA1

1322f9d2daccf4ff016a73d27daa5a17b187046f
SHA256

80384108010dffb5c0f2ad250925dc0fbe80a5e1dfc76fa8b2d1bcc9283bd091
SHA512

0175647093c69ff3a6a403f5397933df23a5b4eddb8feceb13650e373fe7d8bf94250c0dac67d7a8b6efd34d14e112459a498851006a985c264d345fd2569227
SSDEEP

49152:uR/W9yhKrDPtTbvMr2aQPF7Ifxzce3qLz+LZwlhVXaL4tE6SV1nF19B7o:uR/jitHEraLz9Fu

Score

10^/10

lumma discovery stealer

Malware Config

Extracted

Family

lumma

https://hummskitnj.buzz/api

https://cashfuzysao.buzz/api

https://appliacnesot.buzz/api

https://screwamusresz.buzz/api

https://inherineau.buzz/api

https://scentniej.buzz/api

https://rebuildeso.buzz/api

https://prisonyfork.buzz/api

Signatures

Lumma Stealer, LummaC
Lumma or LummaC is an infostealer written in C++ first seen in August 2022.
stealer lumma
Lumma family
lumma

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3240 set thread context of 4344	3240	External2.4.exe	77

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	External2.4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BitLockerToGo.exe

Modifies registry class 4 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2253712635-4068079004-3870069674-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\Content\CachePrefix	BackgroundTransferHost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2253712635-4068079004-3870069674-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\Cookies\CachePrefix = "Cookie:"	BackgroundTransferHost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2253712635-4068079004-3870069674-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\History\CachePrefix = "Visited:"	BackgroundTransferHost.exe
Key created	\REGISTRY\USER\S-1-5-21-2253712635-4068079004-3870069674-1000_Classes\Local Settings\MuiCache	BackgroundTransferHost.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3240 wrote to memory of 4344	3240	External2.4.exe	77
PID 3240 wrote to memory of 4344	3240	External2.4.exe	77
PID 3240 wrote to memory of 4344	3240	External2.4.exe	77
PID 3240 wrote to memory of 4344	3240	External2.4.exe	77
PID 3240 wrote to memory of 4344	3240	External2.4.exe	77
PID 3240 wrote to memory of 4344	3240	External2.4.exe	77
PID 3240 wrote to memory of 4344	3240	External2.4.exe	77
PID 3240 wrote to memory of 4344	3240	External2.4.exe	77
PID 3240 wrote to memory of 4344	3240	External2.4.exe	77

C:\Users\Admin\AppData\Local\Temp\External2.4.exe
"C:\Users\Admin\AppData\Local\Temp\External2.4.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3240
- C:\Windows\BitLockerDiscoveryVolumeContents\BitLockerToGo.exe
  "C:\Windows\BitLockerDiscoveryVolumeContents\BitLockerToGo.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4344

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalService -p -s NPSMSvc
1⤵
PID:3968

C:\Windows\system32\BackgroundTransferHost.exe
"BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.13
1⤵
- Modifies registry class
PID:792

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\AC\BackgroundTransferApi\4780ef5a-a133-4b9b-bfa0-e6fea5ebe1c8.down_data

Filesize
126KB

MD5
0a110bd321f114ff8727674eee2a490f

SHA1
ed3eed0bc086ef1df640064d483e20487182a215

SHA256
f1f611b30db0431160b742fb7b8a5ae609a7acbd3724810d92e186c65c14c268

SHA512
3c08d7c95e5bb0fbdf87cce4fbf7cb10db1f2d5df8cc3e8c214ae064d1e0a0bbcdb1d599605a04dd0ab8c0c3fe5401e5a75ee8620d219e4e0da0810693bef728

Download Submit
memory/4344-0-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/4344-1-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/4344-2-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/4344-3-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/4344-4-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download