umbral | f36f29328d18f9d764b1a9e1e278750d21164ae1c1a25307d018a8e4e17c7c08

Analysis

max time kernel
90s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
12-02-2024 02:01

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General

Target

idk2.exe
Size

235KB
MD5

de1f5092e62d04690fb1d954f8540116
SHA1

959c0ee9355335d66fa5939dda6d452be32a8a06
SHA256

f36f29328d18f9d764b1a9e1e278750d21164ae1c1a25307d018a8e4e17c7c08
SHA512

2f438cffea72ebb9b089bfba476f4606a92667c154b31c2a6c4153a5ea4aa61620571a4db36a7ed5dffd71cd6edc9250157238b0e8b3a5a53fd27952dd3c2fa6
SSDEEP

6144:qbjntB9rSX4wXTAOU5Mj1af2FUD8bTc5Niydt8k1Mwce6yoN:qbjn1WowBTbTcLFHd1Mwz6t

Score

10^/10

umbral stealer

Malware Config

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000e000000023145-4.dat	family_umbral
behavioral2/memory/2464-11-0x000001B6B68A0000-0x000001B6B68E0000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral

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-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation	idk2.exe

Executes dropped EXE 1 IoCs

pid	Process
2464	Umbral.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1644	powershell.exe
1644	powershell.exe

Suspicious use of AdjustPrivilegeToken 44 IoCs

description	pid	Process
Token: SeDebugPrivilege	2464	Umbral.exe
Token: SeDebugPrivilege	1644	powershell.exe
Token: SeIncreaseQuotaPrivilege	4516	wmic.exe
Token: SeSecurityPrivilege	4516	wmic.exe
Token: SeTakeOwnershipPrivilege	4516	wmic.exe
Token: SeLoadDriverPrivilege	4516	wmic.exe
Token: SeSystemProfilePrivilege	4516	wmic.exe
Token: SeSystemtimePrivilege	4516	wmic.exe
Token: SeProfSingleProcessPrivilege	4516	wmic.exe
Token: SeIncBasePriorityPrivilege	4516	wmic.exe
Token: SeCreatePagefilePrivilege	4516	wmic.exe
Token: SeBackupPrivilege	4516	wmic.exe
Token: SeRestorePrivilege	4516	wmic.exe
Token: SeShutdownPrivilege	4516	wmic.exe
Token: SeDebugPrivilege	4516	wmic.exe
Token: SeSystemEnvironmentPrivilege	4516	wmic.exe
Token: SeRemoteShutdownPrivilege	4516	wmic.exe
Token: SeUndockPrivilege	4516	wmic.exe
Token: SeManageVolumePrivilege	4516	wmic.exe
Token: 33	4516	wmic.exe
Token: 34	4516	wmic.exe
Token: 35	4516	wmic.exe
Token: 36	4516	wmic.exe
Token: SeIncreaseQuotaPrivilege	4516	wmic.exe
Token: SeSecurityPrivilege	4516	wmic.exe
Token: SeTakeOwnershipPrivilege	4516	wmic.exe
Token: SeLoadDriverPrivilege	4516	wmic.exe
Token: SeSystemProfilePrivilege	4516	wmic.exe
Token: SeSystemtimePrivilege	4516	wmic.exe
Token: SeProfSingleProcessPrivilege	4516	wmic.exe
Token: SeIncBasePriorityPrivilege	4516	wmic.exe
Token: SeCreatePagefilePrivilege	4516	wmic.exe
Token: SeBackupPrivilege	4516	wmic.exe
Token: SeRestorePrivilege	4516	wmic.exe
Token: SeShutdownPrivilege	4516	wmic.exe
Token: SeDebugPrivilege	4516	wmic.exe
Token: SeSystemEnvironmentPrivilege	4516	wmic.exe
Token: SeRemoteShutdownPrivilege	4516	wmic.exe
Token: SeUndockPrivilege	4516	wmic.exe
Token: SeManageVolumePrivilege	4516	wmic.exe
Token: 33	4516	wmic.exe
Token: 34	4516	wmic.exe
Token: 35	4516	wmic.exe
Token: 36	4516	wmic.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 660 wrote to memory of 1644	660	idk2.exe	85
PID 660 wrote to memory of 1644	660	idk2.exe	85
PID 660 wrote to memory of 1644	660	idk2.exe	85
PID 660 wrote to memory of 2464	660	idk2.exe	87
PID 660 wrote to memory of 2464	660	idk2.exe	87
PID 2464 wrote to memory of 4516	2464	Umbral.exe	97
PID 2464 wrote to memory of 4516	2464	Umbral.exe	97

C:\Users\Admin\AppData\Local\Temp\idk2.exe
"C:\Users\Admin\AppData\Local\Temp\idk2.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:660
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAGIAcABnACMAPgBBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAAPAAjAHcAZABxACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAHIAbwBmAGkAbABlACwAJABlAG4AdgA6AFMAeQBzAHQAZQBtAEQAcgBpAHYAZQApACAAPAAjAG0AcgBuACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAHQAZgBpACMAPgA="
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1644
- C:\Users\Admin\AppData\Local\Temp\Umbral.exe
  "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2464
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:4516

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
230KB

MD5
c8b5184d9b887d92ab00e72ecb7ec278

SHA1
eb54b2c391556183c63877a988df43633961aa87

SHA256
e1c82e170147a3acbb3fb9cc57bea7d25e0ce2d9c570994ac5a027819c9d5b9f

SHA512
2c2a52c97579efc2df50063bb80280de04fb3e52b1cf20b089f71cb1746e66867dfbbf44e2357c1ce20e3b10b933da4b811cae34052ac4ce95d90419a45e38a9

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_hecvifzo.dw3.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1644-34-0x000000007EF20000-0x000000007EF30000-memory.dmp

Filesize
64KB

Download
memory/1644-60-0x0000000074FA0000-0x0000000075750000-memory.dmp

Filesize
7.7MB

Download
memory/1644-14-0x00000000021A0000-0x00000000021D6000-memory.dmp

Filesize
216KB

Download
memory/1644-15-0x0000000074FA0000-0x0000000075750000-memory.dmp

Filesize
7.7MB

Download
memory/1644-17-0x0000000004EA0000-0x00000000054C8000-memory.dmp

Filesize
6.2MB

Download
memory/1644-16-0x0000000004860000-0x0000000004870000-memory.dmp

Filesize
64KB

Download
memory/1644-36-0x0000000070D40000-0x0000000070D8C000-memory.dmp

Filesize
304KB

Download
memory/1644-19-0x0000000004B10000-0x0000000004B32000-memory.dmp

Filesize
136KB

Download
memory/1644-20-0x0000000004DB0000-0x0000000004E16000-memory.dmp

Filesize
408KB

Download
memory/1644-35-0x0000000006080000-0x00000000060B2000-memory.dmp

Filesize
200KB

Download
memory/1644-21-0x00000000054D0000-0x0000000005536000-memory.dmp

Filesize
408KB

Download
memory/1644-31-0x0000000005640000-0x0000000005994000-memory.dmp

Filesize
3.3MB

Download
memory/1644-32-0x0000000005AB0000-0x0000000005ACE000-memory.dmp

Filesize
120KB

Download
memory/1644-33-0x0000000005B00000-0x0000000005B4C000-memory.dmp

Filesize
304KB

Download
memory/1644-57-0x0000000007060000-0x0000000007068000-memory.dmp

Filesize
32KB

Download
memory/1644-56-0x0000000007110000-0x000000000712A000-memory.dmp

Filesize
104KB

Download
memory/1644-18-0x0000000004860000-0x0000000004870000-memory.dmp

Filesize
64KB

Download
memory/1644-46-0x0000000006A80000-0x0000000006A9E000-memory.dmp

Filesize
120KB

Download
memory/1644-47-0x0000000004860000-0x0000000004870000-memory.dmp

Filesize
64KB

Download
memory/1644-48-0x0000000006CA0000-0x0000000006D43000-memory.dmp

Filesize
652KB

Download
memory/1644-49-0x0000000007420000-0x0000000007A9A000-memory.dmp

Filesize
6.5MB

Download
memory/1644-50-0x0000000006DE0000-0x0000000006DFA000-memory.dmp

Filesize
104KB

Download
memory/1644-51-0x0000000006E50000-0x0000000006E5A000-memory.dmp

Filesize
40KB

Download
memory/1644-52-0x0000000007070000-0x0000000007106000-memory.dmp

Filesize
600KB

Download
memory/1644-53-0x0000000006FE0000-0x0000000006FF1000-memory.dmp

Filesize
68KB

Download
memory/1644-54-0x0000000007020000-0x000000000702E000-memory.dmp

Filesize
56KB

Download
memory/1644-55-0x0000000007030000-0x0000000007044000-memory.dmp

Filesize
80KB

Download
memory/2464-13-0x000001B6B8770000-0x000001B6B8780000-memory.dmp

Filesize
64KB

Download
memory/2464-63-0x00007FFDCAC20000-0x00007FFDCB6E1000-memory.dmp

Filesize
10.8MB

Download
memory/2464-12-0x00007FFDCAC20000-0x00007FFDCB6E1000-memory.dmp

Filesize
10.8MB

Download
memory/2464-61-0x00007FFDCAC20000-0x00007FFDCB6E1000-memory.dmp

Filesize
10.8MB

Download
memory/2464-11-0x000001B6B68A0000-0x000001B6B68E0000-memory.dmp

Filesize
256KB

Download