262a89d01968ca23f76f345aeb75d88cc6c65b02fd471d7d2adaa083d3d57d03

General

Target

chthonic_2.2.2.0.vir.exe
Size

124KB
MD5

eeac9de24d64a8cdbc5a3efabf736b2f
SHA1

b57aef1904ffd2e7a0014848ba1870048f150816
SHA256

262a89d01968ca23f76f345aeb75d88cc6c65b02fd471d7d2adaa083d3d57d03
SHA512

3b185cbde217e92cbdd2abf17a68b4977338abc47a121f8d4bd14cf6ae6d4725c9c7cefa0cf1f397037ee452a3c701b8313830e789058455d09a57283d5c5f3d

Score

10^/10

upx evasion trojan persistence

Malware Config

Signatures

Suspicious behavior: RenamesItself 1 IoCs

Processes:

winver.exe

pid process

1504 winver.exe
Modifies visiblity of hidden/system files in Explorer 2 TTPs
evasion

Hidden Files and Directories
T1158

Modify Registry
T1112
Drops file in Program Files directory 1 IoCs

Processes:

winver.exe

description ioc process

File opened for modification C:\PROGRA~3\Macromedia\Macromediaxpers.exe winver.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

chthonic_2.2.2.0.vir.exe

pid process

1132 chthonic_2.2.2.0.vir.exe
1132 chthonic_2.2.2.0.vir.exe

description	ioc	process
File opened for modification	C:\PROGRA~3\Macromedia\Macromediaxpers.exe	winver.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

chthonic_2.2.2.0.vir.exe

description	pid	process	target process
PID 1132 set thread context of 1296	1132	chthonic_2.2.2.0.vir.exe	iexplore.exe
PID 1132 set thread context of 1412	1132	chthonic_2.2.2.0.vir.exe	chthonic_2.2.2.0.vir.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

Processes:

chthonic_2.2.2.0.vir.exewinver.exeiexplore.exe

description	pid	process
Token: SeDebugPrivilege	1412	chthonic_2.2.2.0.vir.exe
Token: SeBackupPrivilege	1412	chthonic_2.2.2.0.vir.exe
Token: SeRestorePrivilege	1412	chthonic_2.2.2.0.vir.exe
Token: SeDebugPrivilege	1504	winver.exe
Token: SeBackupPrivilege	1504	winver.exe
Token: SeRestorePrivilege	1504	winver.exe
Token: SeDebugPrivilege	1296	iexplore.exe
Token: SeBackupPrivilege	1296	iexplore.exe
Token: SeRestorePrivilege	1296	iexplore.exe

Disables taskbar notifications via registry modification
evasion

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

chthonic_2.2.2.0.vir.exechthonic_2.2.2.0.vir.exe

description	pid	process	target process
PID 1132 wrote to memory of 1296	1132	chthonic_2.2.2.0.vir.exe	iexplore.exe
PID 1132 wrote to memory of 1296	1132	chthonic_2.2.2.0.vir.exe	iexplore.exe
PID 1132 wrote to memory of 1296	1132	chthonic_2.2.2.0.vir.exe	iexplore.exe
PID 1132 wrote to memory of 1296	1132	chthonic_2.2.2.0.vir.exe	iexplore.exe
PID 1132 wrote to memory of 1296	1132	chthonic_2.2.2.0.vir.exe	iexplore.exe
PID 1132 wrote to memory of 1296	1132	chthonic_2.2.2.0.vir.exe	iexplore.exe
PID 1132 wrote to memory of 1296	1132	chthonic_2.2.2.0.vir.exe	iexplore.exe
PID 1132 wrote to memory of 1296	1132	chthonic_2.2.2.0.vir.exe	iexplore.exe
PID 1132 wrote to memory of 1412	1132	chthonic_2.2.2.0.vir.exe	chthonic_2.2.2.0.vir.exe
PID 1132 wrote to memory of 1412	1132	chthonic_2.2.2.0.vir.exe	chthonic_2.2.2.0.vir.exe
PID 1132 wrote to memory of 1412	1132	chthonic_2.2.2.0.vir.exe	chthonic_2.2.2.0.vir.exe
PID 1132 wrote to memory of 1412	1132	chthonic_2.2.2.0.vir.exe	chthonic_2.2.2.0.vir.exe
PID 1132 wrote to memory of 1412	1132	chthonic_2.2.2.0.vir.exe	chthonic_2.2.2.0.vir.exe
PID 1132 wrote to memory of 1412	1132	chthonic_2.2.2.0.vir.exe	chthonic_2.2.2.0.vir.exe
PID 1132 wrote to memory of 1412	1132	chthonic_2.2.2.0.vir.exe	chthonic_2.2.2.0.vir.exe
PID 1132 wrote to memory of 1412	1132	chthonic_2.2.2.0.vir.exe	chthonic_2.2.2.0.vir.exe
PID 1412 wrote to memory of 1504	1412	chthonic_2.2.2.0.vir.exe	winver.exe
PID 1412 wrote to memory of 1504	1412	chthonic_2.2.2.0.vir.exe	winver.exe
PID 1412 wrote to memory of 1504	1412	chthonic_2.2.2.0.vir.exe	winver.exe
PID 1412 wrote to memory of 1504	1412	chthonic_2.2.2.0.vir.exe	winver.exe
PID 1412 wrote to memory of 1504	1412	chthonic_2.2.2.0.vir.exe	winver.exe

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral1/memory/1296-0-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral1/memory/1296-3-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral1/memory/1296-4-0x0000000000400000-0x0000000000414000-memory.dmp	upx

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

winver.exe

description ioc process

Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" winver.exe
UAC bypass 3 TTPs
evasion trojan

Bypass User Account Control
T1088

Disabling Security Tools
T1089

Modify Registry
T1112

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	winver.exe

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

winver.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	winver.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\2292364352 = "C:\\PROGRA~3\\Macromedia\\Macromediaxpers.exe"	winver.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

chthonic_2.2.2.0.vir.exechthonic_2.2.2.0.vir.exewinver.exeiexplore.exe

pid	process
1132	chthonic_2.2.2.0.vir.exe
1412	chthonic_2.2.2.0.vir.exe
1412	chthonic_2.2.2.0.vir.exe
1504	winver.exe
1504	winver.exe
1504	winver.exe
1296	iexplore.exe
1296	iexplore.exe

Suspicious behavior: MapViewOfSection 20 IoCs

Processes:

winver.exe

pid	process
1504	winver.exe
1504	winver.exe
1504	winver.exe
1504	winver.exe
1504	winver.exe
1504	winver.exe
1504	winver.exe
1504	winver.exe
1504	winver.exe
1504	winver.exe
1504	winver.exe
1504	winver.exe
1504	winver.exe
1504	winver.exe
1504	winver.exe
1504	winver.exe
1504	winver.exe
1504	winver.exe
1504	winver.exe
1504	winver.exe

System policy modification 1 TTPs 2 IoCs

evasion

Modify Registry

T1112

Processes:

winver.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\system	winver.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	winver.exe

C:\Users\Admin\AppData\Local\Temp\chthonic_2.2.2.0.vir.exe
"C:\Users\Admin\AppData\Local\Temp\chthonic_2.2.2.0.vir.exe"
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
- Suspicious behavior: EnumeratesProcesses
PID:1132

C:\Program Files (x86)\Internet Explorer\iexplore.exe
"C:\Program Files (x86)\Internet Explorer\iexplore.exe"
2⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious behavior: EnumeratesProcesses
PID:1296

C:\Users\Admin\AppData\Local\Temp\chthonic_2.2.2.0.vir.exe
C:\Users\Admin\AppData\Local\Temp\chthonic_2.2.2.0.vir.exe
2⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- Suspicious behavior: EnumeratesProcesses
PID:1412

C:\Windows\SysWOW64\winver.exe
winver
3⤵
- Suspicious behavior: RenamesItself
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Checks whether UAC is enabled
- Adds policy Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- System policy modification
PID:1504

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Hidden Files and Directories

1

T1158

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Bypass User Account Control

1

T1088

Defense Evasion

Hidden Files and Directories

1

T1158

Modify Registry

4

T1112

Bypass User Account Control

1

T1088

Disabling Security Tools

1

T1089

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/1296-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1296-1-0x0000000000412110-mapping.dmp

Download
memory/1296-3-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1296-4-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1296-7-0x0000000000412110-mapping.dmp

Download
memory/1412-2-0x0000000000400000-0x0000000006800000-memory.dmp

Filesize
100.0MB

Download
memory/1412-5-0x0000000000401CBF-mapping.dmp

Download
memory/1504-6-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads