icexloader | 28b0e4a555f41d4709a7d180f2b951491efa80d054cad46c887059ac79d75745

Analysis

max time kernel
148s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
08-03-2023 21:39

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General

Target

Installer.exe
Size

5.0MB
MD5

7c54b7057111165aed5885a25a662284
SHA1

2427f02080a0f3040e82731f16d264b686b50d2a
SHA256

28b0e4a555f41d4709a7d180f2b951491efa80d054cad46c887059ac79d75745
SHA512

aa2e8228e1911fc1edbb264b925e01c750dff5a722d1dbe0144e40e497710e87591d9954cc04df8ee6aa92221f79411d3c7d39e1082cb5f0a6f710b4c67895dd
SSDEEP

98304:N9/3GjyyERJicIqAviJXjlsjBKF7ZHSAZginBJzCV9NAi5o8fWw:NlGjyyERMjTvAXjlgK5ZHdZginrCrNAg

Score

10^/10

icexloader loader persistence

Malware Config

Extracted

Family

icexloader

http://golden-cheats.com/icex/Script.php

Signatures

Detects IceXLoader v3.0 4 IoCs

resource	yara_rule
behavioral2/memory/1840-140-0x0000000000400000-0x0000000000451000-memory.dmp	family_icexloader_v3
behavioral2/memory/1840-142-0x0000000000400000-0x0000000000451000-memory.dmp	family_icexloader_v3
behavioral2/memory/1840-144-0x0000000000400000-0x0000000000451000-memory.dmp	family_icexloader_v3
behavioral2/memory/1840-145-0x0000000000400000-0x0000000000451000-memory.dmp	family_icexloader_v3

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe\","	Installer.exe

icexloader
IceXLoader is a downloader used to deliver other malware families.
loader icexloader

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-1-5-21-1013461898-3711306144-4198452673-1000\Control Panel\International\Geo\Nation	Installer.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 436 set thread context of 1840	436	Installer.exe	103

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3792	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
436	Installer.exe
436	Installer.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	436	Installer.exe

Suspicious use of WriteProcessMemory 31 IoCs

description	pid	Process	procid_target
PID 436 wrote to memory of 2904	436	Installer.exe	84
PID 436 wrote to memory of 2904	436	Installer.exe	84
PID 436 wrote to memory of 2904	436	Installer.exe	84
PID 436 wrote to memory of 4536	436	Installer.exe	92
PID 436 wrote to memory of 4536	436	Installer.exe	92
PID 436 wrote to memory of 4536	436	Installer.exe	92
PID 4536 wrote to memory of 3792	4536	cmd.exe	94
PID 4536 wrote to memory of 3792	4536	cmd.exe	94
PID 4536 wrote to memory of 3792	4536	cmd.exe	94
PID 436 wrote to memory of 1840	436	Installer.exe	103
PID 436 wrote to memory of 1840	436	Installer.exe	103
PID 436 wrote to memory of 1840	436	Installer.exe	103
PID 436 wrote to memory of 1840	436	Installer.exe	103
PID 436 wrote to memory of 1840	436	Installer.exe	103
PID 436 wrote to memory of 1840	436	Installer.exe	103
PID 436 wrote to memory of 1840	436	Installer.exe	103
PID 436 wrote to memory of 1840	436	Installer.exe	103
PID 436 wrote to memory of 1840	436	Installer.exe	103
PID 436 wrote to memory of 1840	436	Installer.exe	103
PID 436 wrote to memory of 1840	436	Installer.exe	103
PID 436 wrote to memory of 1840	436	Installer.exe	103
PID 436 wrote to memory of 1840	436	Installer.exe	103
PID 436 wrote to memory of 1840	436	Installer.exe	103
PID 436 wrote to memory of 1840	436	Installer.exe	103
PID 436 wrote to memory of 1840	436	Installer.exe	103
PID 436 wrote to memory of 1840	436	Installer.exe	103
PID 436 wrote to memory of 1840	436	Installer.exe	103
PID 436 wrote to memory of 1840	436	Installer.exe	103
PID 436 wrote to memory of 1840	436	Installer.exe	103
PID 436 wrote to memory of 1840	436	Installer.exe	103
PID 436 wrote to memory of 1840	436	Installer.exe	103

C:\Users\Admin\AppData\Local\Temp\Installer.exe
"C:\Users\Admin\AppData\Local\Temp\Installer.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:436
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe"
  2⤵
  PID:2904
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout 45
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4536
- - C:\Windows\SysWOW64\timeout.exe
    timeout 45
    3⤵
    - Delays execution with timeout.exe
    PID:3792
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  2⤵
  PID:1840

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/436-133-0x0000000000890000-0x0000000000D98000-memory.dmp

Filesize
5.0MB

Download
memory/436-134-0x00000000061E0000-0x00000000061F0000-memory.dmp

Filesize
64KB

Download
memory/436-135-0x00000000061E0000-0x00000000061F0000-memory.dmp

Filesize
64KB

Download
memory/436-136-0x00000000013F0000-0x0000000001456000-memory.dmp

Filesize
408KB

Download
memory/436-137-0x0000000028450000-0x00000000284E2000-memory.dmp

Filesize
584KB

Download
memory/436-138-0x0000000028AA0000-0x0000000029044000-memory.dmp

Filesize
5.6MB

Download
memory/1840-140-0x0000000000400000-0x0000000000451000-memory.dmp

Filesize
324KB

Download
memory/1840-142-0x0000000000400000-0x0000000000451000-memory.dmp

Filesize
324KB

Download
memory/1840-144-0x0000000000400000-0x0000000000451000-memory.dmp

Filesize
324KB

Download
memory/1840-145-0x0000000000400000-0x0000000000451000-memory.dmp

Filesize
324KB

Download