8e95865efd39220dfc4abebc27141d9eae288a11981e43f09cbee6bf90347fe0

Analysis

max time kernel
125s
max time network
121s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
04-11-2024 20:53

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General

Target

Umbral.Stealer.zip
Size

3.3MB
MD5

f355889db3ff6bae624f80f41a52e619
SHA1

47f7916272a81d313e70808270c3c351207b890f
SHA256

8e95865efd39220dfc4abebc27141d9eae288a11981e43f09cbee6bf90347fe0
SHA512

bff7636f6cc0fadfd6f027e2ebda9e80fd5c64d551b2c666929b2d990509af73b082d739f14bb1497be292eafe703ebd5d7188493e2cc34b73d249fe901820eb
SSDEEP

98304:XINn7mVoLvbDU48xzliDSjtYV2jg0tsGTplmOhl88uF:mjLvvD8BcSjtAB0zplNl8Z

Score

7^/10

discovery

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

Umbral.builder.exe

pid process

2176 Umbral.builder.exe
System Location Discovery: System Language Discovery 1 TTPs 1 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

Processes:

AcroRd32.exe

description ioc process

Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language AcroRd32.exe
Modifies registry class 1 IoCs

Processes:

7zFM.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-2039016743-699959520-214465309-1000_Classes\Local Settings 7zFM.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

7zFM.exe

pid process

2844 7zFM.exe
Suspicious behavior: GetForegroundWindowSpam 2 IoCs

Processes:

7zFM.exeAcroRd32.exe

pid process

2844 7zFM.exe
2676 AcroRd32.exe

pid	process
2176	Umbral.builder.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AcroRd32.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2039016743-699959520-214465309-1000_Classes\Local Settings	7zFM.exe

pid	process
2844	7zFM.exe

pid	process
2844	7zFM.exe
2676	AcroRd32.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

7zFM.exe

description	pid	process
Token: SeRestorePrivilege	2844	7zFM.exe
Token: 35	2844	7zFM.exe
Token: SeSecurityPrivilege	2844	7zFM.exe
Token: SeSecurityPrivilege	2844	7zFM.exe

Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

7zFM.exe

pid process

2844 7zFM.exe
2844 7zFM.exe
2844 7zFM.exe
2844 7zFM.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

AcroRd32.exe

pid process

2676 AcroRd32.exe
2676 AcroRd32.exe

pid	process
2844	7zFM.exe
2844	7zFM.exe
2844	7zFM.exe
2844	7zFM.exe

pid	process
2676	AcroRd32.exe
2676	AcroRd32.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

7zFM.exeUmbral.builder.exe

description	pid	process	target process
PID 2844 wrote to memory of 2176	2844	7zFM.exe	Umbral.builder.exe
PID 2844 wrote to memory of 2176	2844	7zFM.exe	Umbral.builder.exe
PID 2844 wrote to memory of 2176	2844	7zFM.exe	Umbral.builder.exe
PID 2176 wrote to memory of 2440	2176	Umbral.builder.exe	WerFault.exe
PID 2176 wrote to memory of 2440	2176	Umbral.builder.exe	WerFault.exe
PID 2176 wrote to memory of 2440	2176	Umbral.builder.exe	WerFault.exe
PID 2844 wrote to memory of 2676	2844	7zFM.exe	AcroRd32.exe
PID 2844 wrote to memory of 2676	2844	7zFM.exe	AcroRd32.exe
PID 2844 wrote to memory of 2676	2844	7zFM.exe	AcroRd32.exe
PID 2844 wrote to memory of 2676	2844	7zFM.exe	AcroRd32.exe

C:\Program Files\7-Zip\7zFM.exe
"C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\Umbral.Stealer.zip"
1⤵
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:2844
- C:\Users\Admin\AppData\Local\Temp\7zOC1BFE1D6\Umbral.builder.exe
  "C:\Users\Admin\AppData\Local\Temp\7zOC1BFE1D6\Umbral.builder.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:2176
- - C:\Windows\system32\WerFault.exe
    C:\Windows\system32\WerFault.exe -u -p 2176 -s 604
    3⤵
    PID:2440
- C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
  "C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Local\Temp\7zOC1B9F9F6\Umbral.builder.exe.config"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  PID:2676

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\7zOC1B9F9F6\Umbral.builder.exe.config

Filesize
163B

MD5
dccd44fb11b8e4ebdfb822e809a54b6f

SHA1
1889d5ae8c7c70c051cbde104af6e0f31f8c1b63

SHA256
6862b25736259f7bfd344e43eea10a703885be381eee2a745ceb12916b01a158

SHA512
dadffe41bdadfc3a79cb34369c9a8b37ce4833aee18058b02dcb13d64007f022b80b63ab404572c60278937cf83b06b00712ff9ee302e725b9d5c7fe14bd5f50

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zOC1BFE1D6\Umbral.builder.exe

Filesize
114KB

MD5
d91fb6867df7e4303d98b5e90faae73c

SHA1
496f53ad8cd9381f1c1b577a73e978081002c1db

SHA256
bb19b002df31e1196b4e6530cf54c449e9cf1383d3adc5334a0442fa96b36344

SHA512
5dbcfe9bf567c6f1e18027950726af1835ab8b363ba8b040fd379b4cfe94b0894bc969b3c04fa4f1964b441a7b894bd4d37f3aabe3ea31396687a6ca093cfdc9

Download Submit
memory/2176-11-0x00000000000D0000-0x00000000000F2000-memory.dmp

Filesize
136KB

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