fc8d24c71ef20834b97c25f02b008490fbc3f22236f0514c01dc79f85c890c18

General

Target
fc8d24c71ef20834b97c25f02b008490fbc3f22236f0514c01dc79f85c890c18.exe
Size 17KB
Sample241114-e9b1dayjgj
SHA256 fc8d24c71ef20834b97c25f02b008490fbc3f22236f0514c01dc79f85c890c18
MD5 d47f549e57a4ec09254523ffdea98829
SHA1 cb3da86dac94b851afd681ee3fb3ce6326649974
SHA512 7656b8897ebb8b837d73d3011bc9f2fc0c7e072763a407ca523780a1cabaa6b0f53d952ed4006843b2db117bb5dd0d8deacaf5d9856641e0f3063ceda2c84812
SSDEEP 384:IO3qdXlIQV0YXd45xuYiMcRWnPbeVGWLogrrrrm:IO3EVdV0YXd4DuicNV3lrrrrm
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

defense_evasion discovery evasion upx

Malware Config

Signatures

Sets file to hidden 1 TTPs 1 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1564.001

pid	Process
5016	attrib.exe

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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	fc8d24c71ef20834b97c25f02b008490fbc3f22236f0514c01dc79f85c890c18.exe

Executes dropped EXE 1 IoCs

pid	Process
1796	jmahost.exe

Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
defense_evasion

File Deletion
T1070.004

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2616-0-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/files/0x000a000000023c5f-3.dat	upx
behavioral2/memory/2616-5-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1796-6-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1796-9-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1796-12-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1796-15-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1796-18-0x0000000000400000-0x0000000000414000-memory.dmp	upx

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\Debug\jmahost.exe	fc8d24c71ef20834b97c25f02b008490fbc3f22236f0514c01dc79f85c890c18.exe
File opened for modification	C:\Windows\Debug\jmahost.exe	fc8d24c71ef20834b97c25f02b008490fbc3f22236f0514c01dc79f85c890c18.exe
File opened for modification	C:\Windows\Debug\jmahost.exe	attrib.exe

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 4 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	fc8d24c71ef20834b97c25f02b008490fbc3f22236f0514c01dc79f85c890c18.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	jmahost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	2616	fc8d24c71ef20834b97c25f02b008490fbc3f22236f0514c01dc79f85c890c18.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2616 wrote to memory of 5016	2616	fc8d24c71ef20834b97c25f02b008490fbc3f22236f0514c01dc79f85c890c18.exe	83
PID 2616 wrote to memory of 5016	2616	fc8d24c71ef20834b97c25f02b008490fbc3f22236f0514c01dc79f85c890c18.exe	83
PID 2616 wrote to memory of 5016	2616	fc8d24c71ef20834b97c25f02b008490fbc3f22236f0514c01dc79f85c890c18.exe	83
PID 2616 wrote to memory of 4536	2616	fc8d24c71ef20834b97c25f02b008490fbc3f22236f0514c01dc79f85c890c18.exe	89
PID 2616 wrote to memory of 4536	2616	fc8d24c71ef20834b97c25f02b008490fbc3f22236f0514c01dc79f85c890c18.exe	89
PID 2616 wrote to memory of 4536	2616	fc8d24c71ef20834b97c25f02b008490fbc3f22236f0514c01dc79f85c890c18.exe	89

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
5016	attrib.exe

C:\Users\Admin\AppData\Local\Temp\fc8d24c71ef20834b97c25f02b008490fbc3f22236f0514c01dc79f85c890c18.exe
"C:\Users\Admin\AppData\Local\Temp\fc8d24c71ef20834b97c25f02b008490fbc3f22236f0514c01dc79f85c890c18.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2616
- C:\Windows\SysWOW64\attrib.exe
  attrib +a +s +h +r C:\Windows\Debug\jmahost.exe
  2⤵
  - Sets file to hidden
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Views/modifies file attributes
  PID:5016
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\FC8D24~1.EXE > nul
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4536

C:\Windows\Debug\jmahost.exe
C:\Windows\Debug\jmahost.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:1796

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

2

T1564

Hidden Files and Directories

2

T1564.001

Indicator Removal

1

T1070

File Deletion

1

T1070.004

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

Exfiltration

Impact

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Downloads

jmahost.exe

Path C:\Windows\debug\jmahost.exe
Size 17KB
SHA256 3b996b0132fb56ddc885edd6015311eda3ac7983a014d69599efb77cc166d631
MD5 8b74e6d44eeb0fb760e813945da305fc
SHA1 5b28f637e193501cb93a1816abd3a934cafa2164
SHA512 2c0ec571b37c94af2cdabe344822fbae26b2a528487c33435bbf2860306b5458c042afab049c712bb32df300b4da9f9851c0d4c2fc64214565c014369d7e0a47
SSDEEP 384:IO3qdXlIQV0YXd45xuYiMcRWnPbeVGWLogrrrr4:IO3EVdV0YXd4DuicNV3lrrrr4
MD5 SHA1 SHA512 SSDEEP

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memory/1796-6-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/1796-9-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/1796-12-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/1796-15-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/1796-18-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/2616-0-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/2616-5-0x0000000000400000-0x0000000000414000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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