eb8636afcde958d15d1e43779500b8a21980727a4d9559773e41d1f25c0ccf4a

General

Target
124f69160117b292e2ed2de331d5e08f_JaffaCakes118.exe
Size 68KB
Sample240701-jdfe5ssflp
SHA256 eb8636afcde958d15d1e43779500b8a21980727a4d9559773e41d1f25c0ccf4a
MD5 124f69160117b292e2ed2de331d5e08f
SHA1 fce8710e72db75553d33644ecb7b84d3edae9b26
SHA512 ce6ee3fdfc5b576935f897ee9c05f90ee5f5023b4a4847c8c62cc2380f346fb77145e1df5d949bed90965a6e545d42c9e34cb8c3ce1a132ad4d8385159ce57c9
SSDEEP 1536:kOC3oppUdCzUwm20MyVpzCRDaroYNhseIXf5wu/3eotT:lC4niCDmznBkhCu/1J
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

defense_evasion discovery exploit upx

Malware Config

Signatures

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
3044	takeown.exe
1476	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-1-5-21-3169499791-3545231813-3156325206-1000\Control Panel\International\Geo\Nation	124f69160117b292e2ed2de331d5e08f_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
1868	regsvr32.exe

Loads dropped DLL 1 IoCs

pid	Process
1868	regsvr32.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3044	takeown.exe
1476	icacls.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4420-0-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral2/memory/4420-2-0x0000000000400000-0x0000000000421000-memory.dmp	upx

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

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1868	regsvr32.exe
1868	regsvr32.exe
1868	regsvr32.exe
1868	regsvr32.exe
1868	regsvr32.exe
1868	regsvr32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1868	regsvr32.exe
Token: SeTakeOwnershipPrivilege	3044	takeown.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4420 wrote to memory of 1868	4420	124f69160117b292e2ed2de331d5e08f_JaffaCakes118.exe	87
PID 4420 wrote to memory of 1868	4420	124f69160117b292e2ed2de331d5e08f_JaffaCakes118.exe	87
PID 4420 wrote to memory of 1868	4420	124f69160117b292e2ed2de331d5e08f_JaffaCakes118.exe	87
PID 1868 wrote to memory of 3044	1868	regsvr32.exe	88
PID 1868 wrote to memory of 3044	1868	regsvr32.exe	88
PID 1868 wrote to memory of 3044	1868	regsvr32.exe	88
PID 1868 wrote to memory of 1476	1868	regsvr32.exe	90
PID 1868 wrote to memory of 1476	1868	regsvr32.exe	90
PID 1868 wrote to memory of 1476	1868	regsvr32.exe	90
PID 1868 wrote to memory of 804	1868	regsvr32.exe	8

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k DcomLaunch -p
1⤵
PID:804

C:\Users\Admin\AppData\Local\Temp\124f69160117b292e2ed2de331d5e08f_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\124f69160117b292e2ed2de331d5e08f_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4420
- C:\Windows\SysWOW64\regsvr32.exe
  "C:\Windows\system32\regsvr32.exe" /s C:\Users\Admin\AppData\Local\Temp\~e5789a2.tmp ,C:\Users\Admin\AppData\Local\Temp\124f69160117b292e2ed2de331d5e08f_JaffaCakes118.exe
  2⤵
  - Deletes itself
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1868
- - C:\Windows\SysWOW64\takeown.exe
    takeown /f "C:\Windows\system32\rpcss.dll"
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    - Suspicious use of AdjustPrivilegeToken
    PID:3044
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Windows\system32\rpcss.dll" /grant administrators:F
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:1476

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

~e5789a2.tmp

Path C:\Users\Admin\AppData\Local\Temp\~e5789a2.tmp
Size 1.0MB
SHA256 bbc8e8660b1cad39649afba6df97aa024aa47b706785337fc30c5bf517ec692e
MD5 e26424ad9bd766aaab724e585359735c
SHA1 aa9541fa9f0dec3ac72b030238660e0099cf9ff8
SHA512 f3f2793fcaaae64baeffc817cd500a8a7f3ce766dd4f475396d7f6a30459951adee918829e86f069ea2a6ce46d45aea9b3467f155009de72c03aebc503668604
SSDEEP 3072:Xu125DAAyybrSsfiB47at2ZSTKHd39QxQ:+ECsfyqat2ZS2HR9Q
MD5 SHA1 SHA512 SSDEEP

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apa.dll

Path C:\Windows\SysWOW64\apa.dll
Size 213B
SHA256 fcfb8397b6ee98662b9cd23cb62efe33f6230fbb173866f614bc3e4df3cd5d9e
MD5 3dec69002f30f34245c8088cd18e0d76
SHA1 a7cf4c53de43817cdbcafed20b0ea130119808fa
SHA512 929a63487ae3474778743767d64d3da2c0b843c82fd93ef734c70699a7d82f5e1d1d9fda7b4f3b1ac6903102853fe7e92001ecd1731f84d2ca6c7ee80e3b5077
MD5 SHA1 SHA512

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memory/4420-0-0x0000000000400000-0x0000000000421000-memory.dmp

Download

memory/4420-2-0x0000000000400000-0x0000000000421000-memory.dmp