icexloader | 28b0e4a555f41d4709a7d180f2b951491efa80d054cad46c887059ac79d75745

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

C2

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

Signatures

Detects IceXLoader v3.0 4 IoCs

Processes:

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

Processes:

Installer.exe

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

Processes:

Installer.exe

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

Processes:

Installer.exe

description pid process target process

PID 436 set thread context of 1840 436 Installer.exe InstallUtil.exe
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

Processes:

timeout.exe

pid process

3792 timeout.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

Installer.exe

pid process

436 Installer.exe
436 Installer.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Installer.exe

description pid process

Token: SeDebugPrivilege 436 Installer.exe

description	pid	process	target process
PID 436 set thread context of 1840	436	Installer.exe	InstallUtil.exe

pid	process
3792	timeout.exe

pid	process
436	Installer.exe
436	Installer.exe

description	pid	process
Token: SeDebugPrivilege	436	Installer.exe

Suspicious use of WriteProcessMemory 31 IoCs

Processes:

Installer.execmd.exe

description	pid	process	target process
PID 436 wrote to memory of 2904	436	Installer.exe	cmd.exe
PID 436 wrote to memory of 2904	436	Installer.exe	cmd.exe
PID 436 wrote to memory of 2904	436	Installer.exe	cmd.exe
PID 436 wrote to memory of 4536	436	Installer.exe	cmd.exe
PID 436 wrote to memory of 4536	436	Installer.exe	cmd.exe
PID 436 wrote to memory of 4536	436	Installer.exe	cmd.exe
PID 4536 wrote to memory of 3792	4536	cmd.exe	timeout.exe
PID 4536 wrote to memory of 3792	4536	cmd.exe	timeout.exe
PID 4536 wrote to memory of 3792	4536	cmd.exe	timeout.exe
PID 436 wrote to memory of 1840	436	Installer.exe	InstallUtil.exe
PID 436 wrote to memory of 1840	436	Installer.exe	InstallUtil.exe
PID 436 wrote to memory of 1840	436	Installer.exe	InstallUtil.exe
PID 436 wrote to memory of 1840	436	Installer.exe	InstallUtil.exe
PID 436 wrote to memory of 1840	436	Installer.exe	InstallUtil.exe
PID 436 wrote to memory of 1840	436	Installer.exe	InstallUtil.exe
PID 436 wrote to memory of 1840	436	Installer.exe	InstallUtil.exe
PID 436 wrote to memory of 1840	436	Installer.exe	InstallUtil.exe
PID 436 wrote to memory of 1840	436	Installer.exe	InstallUtil.exe
PID 436 wrote to memory of 1840	436	Installer.exe	InstallUtil.exe
PID 436 wrote to memory of 1840	436	Installer.exe	InstallUtil.exe
PID 436 wrote to memory of 1840	436	Installer.exe	InstallUtil.exe
PID 436 wrote to memory of 1840	436	Installer.exe	InstallUtil.exe
PID 436 wrote to memory of 1840	436	Installer.exe	InstallUtil.exe
PID 436 wrote to memory of 1840	436	Installer.exe	InstallUtil.exe
PID 436 wrote to memory of 1840	436	Installer.exe	InstallUtil.exe
PID 436 wrote to memory of 1840	436	Installer.exe	InstallUtil.exe
PID 436 wrote to memory of 1840	436	Installer.exe	InstallUtil.exe
PID 436 wrote to memory of 1840	436	Installer.exe	InstallUtil.exe
PID 436 wrote to memory of 1840	436	Installer.exe	InstallUtil.exe
PID 436 wrote to memory of 1840	436	Installer.exe	InstallUtil.exe
PID 436 wrote to memory of 1840	436	Installer.exe	InstallUtil.exe

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 Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

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

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads