umbral | b02f3ef73077f0c54cff0e1d920e2013ea549c97daede6cae61c966d556fff9e

Analysis

max time kernel
146s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240221-en
resource tags

arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
submitted
21/02/2024, 23:06

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General

Target

Havoc-ExecutorV2_.rar
Size

16.8MB
MD5

9ff3dea2bad4a76bc65e98acf1234f0a
SHA1

49754b9f66989694c66a5a50f33426ffdb2cc3f5
SHA256

b02f3ef73077f0c54cff0e1d920e2013ea549c97daede6cae61c966d556fff9e
SHA512

94716419b6a60f2b0b2d454215d1f6bb827f88d8d412115837ed35b9135ff73abd1c3995710c4f52d2bb92db07b94803fee5857041a534d077e0c73bcf49415e
SSDEEP

393216:5C/zS+kIvNug+zU+29zreM2M4ZFKV0o24pGO23dVC8:Y/3kIluV7QvF8ZW0o2FtL

Score

10^/10

umbral stealer

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1202713966892154880/hKt1959RM0bV5-3CpJAwh821Kr6T7h9g1Q2lLB0g86ovim2izdHbNw9y6LtQFK8C5Zhm

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral1/files/0x000100000002a7a9-24.dat	family_umbral
behavioral1/memory/4036-26-0x000001D3A0340000-0x000001D3A03A8000-memory.dmp	family_umbral

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

Executes dropped EXE 2 IoCs

pid	Process
4036	HavocV2.exe
1132	HavocV2.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2930051783-2551506282-3430162621-1000_Classes\Local Settings	cmd.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeRestorePrivilege	2000	7zFM.exe
Token: 35	2000	7zFM.exe
Token: SeSecurityPrivilege	2000	7zFM.exe
Token: SeDebugPrivilege	4036	HavocV2.exe
Token: SeIncreaseQuotaPrivilege	1836	wmic.exe
Token: SeSecurityPrivilege	1836	wmic.exe
Token: SeTakeOwnershipPrivilege	1836	wmic.exe
Token: SeLoadDriverPrivilege	1836	wmic.exe
Token: SeSystemProfilePrivilege	1836	wmic.exe
Token: SeSystemtimePrivilege	1836	wmic.exe
Token: SeProfSingleProcessPrivilege	1836	wmic.exe
Token: SeIncBasePriorityPrivilege	1836	wmic.exe
Token: SeCreatePagefilePrivilege	1836	wmic.exe
Token: SeBackupPrivilege	1836	wmic.exe
Token: SeRestorePrivilege	1836	wmic.exe
Token: SeShutdownPrivilege	1836	wmic.exe
Token: SeDebugPrivilege	1836	wmic.exe
Token: SeSystemEnvironmentPrivilege	1836	wmic.exe
Token: SeRemoteShutdownPrivilege	1836	wmic.exe
Token: SeUndockPrivilege	1836	wmic.exe
Token: SeManageVolumePrivilege	1836	wmic.exe
Token: 33	1836	wmic.exe
Token: 34	1836	wmic.exe
Token: 35	1836	wmic.exe
Token: 36	1836	wmic.exe
Token: SeIncreaseQuotaPrivilege	1836	wmic.exe
Token: SeSecurityPrivilege	1836	wmic.exe
Token: SeTakeOwnershipPrivilege	1836	wmic.exe
Token: SeLoadDriverPrivilege	1836	wmic.exe
Token: SeSystemProfilePrivilege	1836	wmic.exe
Token: SeSystemtimePrivilege	1836	wmic.exe
Token: SeProfSingleProcessPrivilege	1836	wmic.exe
Token: SeIncBasePriorityPrivilege	1836	wmic.exe
Token: SeCreatePagefilePrivilege	1836	wmic.exe
Token: SeBackupPrivilege	1836	wmic.exe
Token: SeRestorePrivilege	1836	wmic.exe
Token: SeShutdownPrivilege	1836	wmic.exe
Token: SeDebugPrivilege	1836	wmic.exe
Token: SeSystemEnvironmentPrivilege	1836	wmic.exe
Token: SeRemoteShutdownPrivilege	1836	wmic.exe
Token: SeUndockPrivilege	1836	wmic.exe
Token: SeManageVolumePrivilege	1836	wmic.exe
Token: 33	1836	wmic.exe
Token: 34	1836	wmic.exe
Token: 35	1836	wmic.exe
Token: 36	1836	wmic.exe
Token: SeDebugPrivilege	1132	HavocV2.exe
Token: SeIncreaseQuotaPrivilege	3256	wmic.exe
Token: SeSecurityPrivilege	3256	wmic.exe
Token: SeTakeOwnershipPrivilege	3256	wmic.exe
Token: SeLoadDriverPrivilege	3256	wmic.exe
Token: SeSystemProfilePrivilege	3256	wmic.exe
Token: SeSystemtimePrivilege	3256	wmic.exe
Token: SeProfSingleProcessPrivilege	3256	wmic.exe
Token: SeIncBasePriorityPrivilege	3256	wmic.exe
Token: SeCreatePagefilePrivilege	3256	wmic.exe
Token: SeBackupPrivilege	3256	wmic.exe
Token: SeRestorePrivilege	3256	wmic.exe
Token: SeShutdownPrivilege	3256	wmic.exe
Token: SeDebugPrivilege	3256	wmic.exe
Token: SeSystemEnvironmentPrivilege	3256	wmic.exe
Token: SeRemoteShutdownPrivilege	3256	wmic.exe
Token: SeUndockPrivilege	3256	wmic.exe
Token: SeManageVolumePrivilege	3256	wmic.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
2000	7zFM.exe
2000	7zFM.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4172 wrote to memory of 2000	4172	cmd.exe	78
PID 4172 wrote to memory of 2000	4172	cmd.exe	78
PID 4036 wrote to memory of 1836	4036	HavocV2.exe	84
PID 4036 wrote to memory of 1836	4036	HavocV2.exe	84
PID 1132 wrote to memory of 3256	1132	HavocV2.exe	88
PID 1132 wrote to memory of 3256	1132	HavocV2.exe	88

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Havoc-ExecutorV2_.rar
1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4172
- C:\Program Files\7-Zip\7zFM.exe
  "C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\Havoc-ExecutorV2_.rar"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  PID:2000

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:1032

C:\Users\Admin\Desktop\Havoc-Executor (1)\Havoc-Executor-V2\Havoc-Executor\Havoc-Executor\Havoc-Executor\Havoc-Executor\HavocV2.exe
"C:\Users\Admin\Desktop\Havoc-Executor (1)\Havoc-Executor-V2\Havoc-Executor\Havoc-Executor\Havoc-Executor\Havoc-Executor\HavocV2.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4036
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1836

C:\Users\Admin\Desktop\Havoc-Executor (1)\Havoc-Executor-V2\Havoc-Executor\Havoc-Executor\Havoc-Executor\Havoc-Executor\HavocV2.exe
"C:\Users\Admin\Desktop\Havoc-Executor (1)\Havoc-Executor-V2\Havoc-Executor\Havoc-Executor\Havoc-Executor\Havoc-Executor\HavocV2.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1132
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3256

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\Microsoft\CLR_v4.0\UsageLogs\HavocV2.exe.log

Filesize
1KB

MD5
02df789e3c730b309fc4d9abce5d729b

SHA1
4f9da0f0d4cadacfd0f68fb1f7ee73a66dcf1b4e

SHA256
4afabcd1723096359d90c8f32df7a6a44cd866e89d5b37c89280bfeab61d7321

SHA512
7ac0dd7e3a3e483d07409da793dd2b0915d4369fe41fe743acd82de9aa77b9fa7ea5cd60498034f3fa0674d93d184c9128375d8f7f0796fddecff3845fca8587

Download Submit
C:\Users\Admin\Desktop\Havoc-Executor (1)\Havoc-Executor-V2\Havoc-Executor\Havoc-Executor\Havoc-Executor\Havoc-Executor\HavocV2.exe

Filesize
394KB

MD5
6867bdcccea54ee53c6a50c31b512bd1

SHA1
5d0e8e73b38eb1d5cfcb158dac68a121466d6719

SHA256
33da805f17a081bcddedae6be9cc2427d0a9b786cd62c1e44440893c02e04bb8

SHA512
6740a2333e8aadbc02f4d63e466ef6f02f4b914bbe3abea9aeeb31d5c10774cc7a2a86e2d4ecc714cf899dd10656114da569a537c5a49ba7f591766f7a60e90c

Download Submit
memory/1132-33-0x00007FF873CB0000-0x00007FF874772000-memory.dmp

Filesize
10.8MB

Download
memory/1132-34-0x0000020110060000-0x0000020110070000-memory.dmp

Filesize
64KB

Download
memory/1132-35-0x00007FF873CB0000-0x00007FF874772000-memory.dmp

Filesize
10.8MB

Download
memory/4036-26-0x000001D3A0340000-0x000001D3A03A8000-memory.dmp

Filesize
416KB

Download
memory/4036-27-0x00007FF873CB0000-0x00007FF874772000-memory.dmp

Filesize
10.8MB

Download
memory/4036-28-0x000001D3A1FD0000-0x000001D3A1FE0000-memory.dmp

Filesize
64KB

Download
memory/4036-30-0x00007FF873CB0000-0x00007FF874772000-memory.dmp

Filesize
10.8MB

Download