umbral | 0c6199877d4e33673f8382783092bed633fb5c763cfecaefa868becb90552574

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
26-06-2024 07:48

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General

Target

New Project 1.exe
Size

2.8MB
MD5

db5a82d0ebc91356da9a392623ef4091
SHA1

a264cb459225c04cfcc77d06286f043404abc995
SHA256

0c6199877d4e33673f8382783092bed633fb5c763cfecaefa868becb90552574
SHA512

51a88d50ca409e11355b0b1966298ab89c5003eabfca200af844dba4010fe22ac1e85525c9dcbd4afc06353d282d5579aa3fb1cf71218e7c5a0fd5ab789ceb8b
SSDEEP

49152:obKHLmcpC9UO0fabN1NVnfJVeAqqI8bmCMFjl4UwFUy:WznOaxVBYAqqNnIwFU

Score

10^/10

umbral stealer

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1255429038366003240/9YDAKsGSDSiJ1xEzClPUYSZVpS45ZTl6_7d_FOyF3cPjShMYEnXZkIm_clQykNpdttDb

Signatures

Detect Umbral payload 3 IoCs

resource	yara_rule
behavioral1/memory/2144-0-0x0000000000400000-0x00000000006D4000-memory.dmp	family_umbral
behavioral1/files/0x0031000000015b13-12.dat	family_umbral
behavioral1/memory/2592-16-0x00000000010A0000-0x00000000010E0000-memory.dmp	family_umbral

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

Executes dropped EXE 2 IoCs

pid	Process
3040	xdwd.exe
2592	12345768.exe

Loads dropped DLL 2 IoCs

pid	Process
2144	New Project 1.exe
2144	New Project 1.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 41 IoCs

description	pid	Process
Token: SeDebugPrivilege	2592	12345768.exe
Token: SeIncreaseQuotaPrivilege	3000	wmic.exe
Token: SeSecurityPrivilege	3000	wmic.exe
Token: SeTakeOwnershipPrivilege	3000	wmic.exe
Token: SeLoadDriverPrivilege	3000	wmic.exe
Token: SeSystemProfilePrivilege	3000	wmic.exe
Token: SeSystemtimePrivilege	3000	wmic.exe
Token: SeProfSingleProcessPrivilege	3000	wmic.exe
Token: SeIncBasePriorityPrivilege	3000	wmic.exe
Token: SeCreatePagefilePrivilege	3000	wmic.exe
Token: SeBackupPrivilege	3000	wmic.exe
Token: SeRestorePrivilege	3000	wmic.exe
Token: SeShutdownPrivilege	3000	wmic.exe
Token: SeDebugPrivilege	3000	wmic.exe
Token: SeSystemEnvironmentPrivilege	3000	wmic.exe
Token: SeRemoteShutdownPrivilege	3000	wmic.exe
Token: SeUndockPrivilege	3000	wmic.exe
Token: SeManageVolumePrivilege	3000	wmic.exe
Token: 33	3000	wmic.exe
Token: 34	3000	wmic.exe
Token: 35	3000	wmic.exe
Token: SeIncreaseQuotaPrivilege	3000	wmic.exe
Token: SeSecurityPrivilege	3000	wmic.exe
Token: SeTakeOwnershipPrivilege	3000	wmic.exe
Token: SeLoadDriverPrivilege	3000	wmic.exe
Token: SeSystemProfilePrivilege	3000	wmic.exe
Token: SeSystemtimePrivilege	3000	wmic.exe
Token: SeProfSingleProcessPrivilege	3000	wmic.exe
Token: SeIncBasePriorityPrivilege	3000	wmic.exe
Token: SeCreatePagefilePrivilege	3000	wmic.exe
Token: SeBackupPrivilege	3000	wmic.exe
Token: SeRestorePrivilege	3000	wmic.exe
Token: SeShutdownPrivilege	3000	wmic.exe
Token: SeDebugPrivilege	3000	wmic.exe
Token: SeSystemEnvironmentPrivilege	3000	wmic.exe
Token: SeRemoteShutdownPrivilege	3000	wmic.exe
Token: SeUndockPrivilege	3000	wmic.exe
Token: SeManageVolumePrivilege	3000	wmic.exe
Token: 33	3000	wmic.exe
Token: 34	3000	wmic.exe
Token: 35	3000	wmic.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2144 wrote to memory of 3040	2144	New Project 1.exe	28
PID 2144 wrote to memory of 3040	2144	New Project 1.exe	28
PID 2144 wrote to memory of 3040	2144	New Project 1.exe	28
PID 2144 wrote to memory of 3040	2144	New Project 1.exe	28
PID 2144 wrote to memory of 3040	2144	New Project 1.exe	28
PID 2144 wrote to memory of 3040	2144	New Project 1.exe	28
PID 2144 wrote to memory of 3040	2144	New Project 1.exe	28
PID 2144 wrote to memory of 2592	2144	New Project 1.exe	29
PID 2144 wrote to memory of 2592	2144	New Project 1.exe	29
PID 2144 wrote to memory of 2592	2144	New Project 1.exe	29
PID 2144 wrote to memory of 2592	2144	New Project 1.exe	29
PID 2592 wrote to memory of 3000	2592	12345768.exe	31
PID 2592 wrote to memory of 3000	2592	12345768.exe	31
PID 2592 wrote to memory of 3000	2592	12345768.exe	31

C:\Users\Admin\AppData\Local\Temp\New Project 1.exe
"C:\Users\Admin\AppData\Local\Temp\New Project 1.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2144
- C:\Users\Admin\AppData\Local\xdwd.exe
  "C:\Users\Admin\AppData\Local\xdwd.exe"
  2⤵
  - Executes dropped EXE
  PID:3040
- C:\Users\Admin\AppData\Local\Temp\12345768.exe
  "C:\Users\Admin\AppData\Local\Temp\12345768.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2592
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:3000

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\12345768.exe

Filesize
229KB

MD5
2f4f52ff66406c1469b08e47d3ac9bc2

SHA1
3414426471b257a2da77860c2d52a0ef0d05f485

SHA256
16aa26d084bc366c27a547f0ed5e5f7ac001b3f95355b9809cb5bfeff00dc5f0

SHA512
e622fcdddc0a4ae7d5afd60cf81f347192ae673ab2c19dbe6d1bf70b08c8309d315088bb20474edae8d3a1ef85b1f949bfc62016eb5632edfe6304fe04603986

Download Submit
\Users\Admin\AppData\Local\xdwd.exe

Filesize
1.6MB

MD5
bf4577bd343e7054fb178671a453d6ab

SHA1
10bff3a3100cf7cd718e2dc857e4ce70d6075473

SHA256
efa96d492077c2ad6bc002425716137714587937824792a6f20e0705f8395755

SHA512
c5a7c31767411761afa58c696a9e38e6e6c0c08eb8021015aa57a775fb1f053680c1459a1aad62795770c85153a226509422a95f56482f004df8030d505beeb2

Download Submit
memory/2144-0-0x0000000000400000-0x00000000006D4000-memory.dmp

Filesize
2.8MB

Download
memory/2592-16-0x00000000010A0000-0x00000000010E0000-memory.dmp

Filesize
256KB

Download
memory/3040-15-0x0000000000180000-0x000000000032A000-memory.dmp

Filesize
1.7MB

Download