19c40ea4fc905abaa2b3bc7d2f0babf9c72cffbba4f3218a1393792a6ac6a3d1

General

Target
1ab18ab1b70d91a73d643983798a1af6_JaffaCakes118.exe
Size 68KB
Sample241007-bnebts1bqa
SHA256 19c40ea4fc905abaa2b3bc7d2f0babf9c72cffbba4f3218a1393792a6ac6a3d1
MD5 1ab18ab1b70d91a73d643983798a1af6
SHA1 329d49f40fa6fd6fdab03a465ca9f459fa5272aa
SHA512 e5fd74d63ea9f172c22e2f09f5962c76e8b7adf102eccadbd792c3fff9463856b23dc388e06427bfab76da6da69bf083cca40505c49e57dc8704280046c9d2db
SSDEEP 1536:sOC3oppUdCzUwm20MyVpzCRDaroYNhseIXf5wu/3eot:tC4niCDmznBkhCu/1
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

defense_evasion discovery exploit upx

Malware Config

Signatures

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
4632	takeown.exe
3336	icacls.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-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation	1ab18ab1b70d91a73d643983798a1af6_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
4020	regsvr32.exe

Loads dropped DLL 1 IoCs

pid	Process
4020	regsvr32.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4632	takeown.exe
3336	icacls.exe

File and Directory Permissions Modification: Windows File and Directory Permissions Modification 1 TTPs
defense_evasion

Windows File and Directory Permissions Modification
T1222.001

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\apa.dll	regsvr32.exe
File created	C:\Windows\SysWOW64\rpcss.dll	regsvr32.exe
File opened for modification	C:\Windows\SysWOW64\rpcss.dll	regsvr32.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1696-0-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral2/memory/1696-3-0x0000000000400000-0x0000000000421000-memory.dmp	upx

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	1ab18ab1b70d91a73d643983798a1af6_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	takeown.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4020	regsvr32.exe
4020	regsvr32.exe
4020	regsvr32.exe
4020	regsvr32.exe
4020	regsvr32.exe
4020	regsvr32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4020	regsvr32.exe
Token: SeTakeOwnershipPrivilege	4632	takeown.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1696 wrote to memory of 4020	1696	1ab18ab1b70d91a73d643983798a1af6_JaffaCakes118.exe	84
PID 1696 wrote to memory of 4020	1696	1ab18ab1b70d91a73d643983798a1af6_JaffaCakes118.exe	84
PID 1696 wrote to memory of 4020	1696	1ab18ab1b70d91a73d643983798a1af6_JaffaCakes118.exe	84
PID 4020 wrote to memory of 4632	4020	regsvr32.exe	85
PID 4020 wrote to memory of 4632	4020	regsvr32.exe	85
PID 4020 wrote to memory of 4632	4020	regsvr32.exe	85
PID 4020 wrote to memory of 3336	4020	regsvr32.exe	87
PID 4020 wrote to memory of 3336	4020	regsvr32.exe	87
PID 4020 wrote to memory of 3336	4020	regsvr32.exe	87
PID 4020 wrote to memory of 816	4020	regsvr32.exe	10

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k DcomLaunch -p
1⤵
PID:816

C:\Users\Admin\AppData\Local\Temp\1ab18ab1b70d91a73d643983798a1af6_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\1ab18ab1b70d91a73d643983798a1af6_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1696
- C:\Windows\SysWOW64\regsvr32.exe
  "C:\Windows\system32\regsvr32.exe" /s C:\Users\Admin\AppData\Local\Temp\~e57b4b9.tmp ,C:\Users\Admin\AppData\Local\Temp\1ab18ab1b70d91a73d643983798a1af6_JaffaCakes118.exe
  2⤵
  - Deletes itself
  - Loads dropped DLL
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4020
- - C:\Windows\SysWOW64\takeown.exe
    takeown /f "C:\Windows\system32\rpcss.dll"
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:4632
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Windows\system32\rpcss.dll" /grant administrators:F
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:3336

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

2

T1222

Windows File and Directory Permissions Modification

1

T1222.001

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

~e57b4b9.tmp

Path C:\Users\Admin\AppData\Local\Temp\~e57b4b9.tmp
Size 1.0MB
SHA256 638799000bf98c3e69c0e97087df8cd494fb8035fcbbfc13a73482e62967d0ec
MD5 8ea505496c77eeee84183008ca643fa8
SHA1 91f434cfa411597e3db967cb1bc0d5fde1ebaf59
SHA512 c8a44976485f1bdb32c6624fe5fe57644923076b867b72c38c66becbeb2513267ba531f9a2b9a5393f78a06ab685c54fe08f0ffc780d5c71e6216f52255973cc
SSDEEP 3072:Xu125DAAyybrSsfiB47at2ZSTKHd32QxQ:+ECsfyqat2ZS2HR2Q
MD5 SHA1 SHA512 SSDEEP

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apa.dll

Path C:\Windows\SysWOW64\apa.dll
Size 217B
SHA256 17cdb7cca4008c44ab73b64b5ee67942c440d7fc619efc35f0d749829b825e35
MD5 0d194f315e3f28297f94af9ae0b81bff
SHA1 dba11f576fff11a5d97cd6413a6a83068e2167bf
SHA512 22a0e6e1c62ec70a8cb4d48544e64c7969967c2d6b7ae617c982e3848e106f14e24d3c7f1973332e410939bc62b7e3681f67a9ed56f880c5d5397ffa99184fb5
MD5 SHA1 SHA512

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memory/1696-0-0x0000000000400000-0x0000000000421000-memory.dmp

Download

memory/1696-3-0x0000000000400000-0x0000000000421000-memory.dmp