stealerium | c1cf23cf49d7406b02b538db9d9636209c706d3f2fd9719bfda55aef5f65cbaa

General

Target
stub.exe
Size 1.6MB
Sample240901-tlr41swdle
SHA256 c1cf23cf49d7406b02b538db9d9636209c706d3f2fd9719bfda55aef5f65cbaa
MD5 96c62ca985ed966d7c6d274caa5bb41a
SHA1 97842b7b0d381ae027f8a92787ffff84eca2a698
SHA512 66e086fdd0f39f0f166c3d9253805de4095e95b47eee38393a113e2279d4f90c13c8584f3827f45c85b2bca71a9119a48dca6f59d006d4015e9c2f6dafedcde5
SSDEEP 49152:LkTq24GjdGSiqkqXfd+/9AqYanieKdsG:L1EjdGSiqkqXf0FLYW
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealerium discovery stealer

Malware Config

Extracted

Family

stealerium

C2

https://discord.com/api/webhooks/1216977598710812722/eEJiGM8jVlIOF9WMbphPIuNdIEZhhSSu4T_LZSo0WE_S2YnMqS8z5lz1bmAKfC9V08aI

Signatures

Stealerium
An open source info stealer written in C# first seen in May 2022.
stealer stealerium

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-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	stub.exe

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

Web Service

T1102

flow	ioc
15	discord.com
16	discord.com

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	stub.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chcp.com
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	taskkill.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2784	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2464	taskkill.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4672	stub.exe
4672	stub.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4672	stub.exe
Token: SeDebugPrivilege	2464	taskkill.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4672 wrote to memory of 228	4672	stub.exe	97
PID 4672 wrote to memory of 228	4672	stub.exe	97
PID 4672 wrote to memory of 228	4672	stub.exe	97
PID 228 wrote to memory of 4024	228	cmd.exe	99
PID 228 wrote to memory of 4024	228	cmd.exe	99
PID 228 wrote to memory of 4024	228	cmd.exe	99
PID 228 wrote to memory of 2464	228	cmd.exe	100
PID 228 wrote to memory of 2464	228	cmd.exe	100
PID 228 wrote to memory of 2464	228	cmd.exe	100
PID 228 wrote to memory of 2784	228	cmd.exe	101
PID 228 wrote to memory of 2784	228	cmd.exe	101
PID 228 wrote to memory of 2784	228	cmd.exe	101

C:\Users\Admin\AppData\Local\Temp\stub.exe
"C:\Users\Admin\AppData\Local\Temp\stub.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4672
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmp7162.tmp.bat
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:228
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4024
- - C:\Windows\SysWOW64\taskkill.exe
    TaskKill /F /IM 4672
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2464
- - C:\Windows\SysWOW64\timeout.exe
    Timeout /T 2 /Nobreak
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2784

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4080,i,16316361669272684588,6171287487746154806,262144 --variations-seed-version --mojo-platform-channel-handle=4324 /prefetch:8
1⤵
PID:1420

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

tmp7162.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp7162.tmp.bat
Size 57B
SHA256 7334dd99c5fe8504f198b4b39842a719a792dd6e63a4d8533d26ec0ce577a366
MD5 084b7d0e8088d67a38d0816ac2addab0
SHA1 4dae9e1e72259c44f4c1a105a0183e8bc6697bdb
SHA512 5e9b22f48b1fd683b94a12d7570d7bd586f006cadd5e430f39c0727815dcb6da1ae61222b921f48be8ab3d7fea7df230bfd00acf7d1795ca9ab0d1fea01ccd64
MD5 SHA1 SHA512

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memory/4672-0-0x00000000744BE000-0x00000000744BF000-memory.dmp

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memory/4672-1-0x0000000000B00000-0x0000000000C92000-memory.dmp

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memory/4672-2-0x0000000005620000-0x0000000005686000-memory.dmp

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memory/4672-3-0x00000000744B0000-0x0000000074C60000-memory.dmp

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memory/4672-4-0x0000000005C00000-0x0000000005C92000-memory.dmp

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memory/4672-5-0x0000000005730000-0x0000000005756000-memory.dmp

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memory/4672-6-0x0000000005760000-0x0000000005768000-memory.dmp

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memory/4672-9-0x00000000744B0000-0x0000000074C60000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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