expiro | 7e6885d9476397b4644fcdb91ef38ba8117440adebc21a317e0b6f65a1dcc661

Analysis

max time kernel
92s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
02/01/2025, 07:43

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General

Target
JaffaCakes118_6394bcb9eeb8524dafdc15efe191d940.exe
Size 895KB
Sample250102-jka41a1pat
SHA256 7e6885d9476397b4644fcdb91ef38ba8117440adebc21a317e0b6f65a1dcc661
MD5 6394bcb9eeb8524dafdc15efe191d940
SHA1 c4178fd9d2f882f60652c7d82117d6677191850c
SHA512 077b78baeb292e480a79e761497fcf8f583259528563130219cbfc64e72bbdbc131a9d1a6a2f336313d51f1e294f52a77b685b00df7cf514d96481a74f4b1d15
SSDEEP 24576:AekqcetqShNCXkJekzWloK8QbQ5V3Kl/:/kqjtqShN3JeXE
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

expiro backdoor discovery

Malware Config

Signatures

Expiro family
expiro
Expiro, m0yv
Expiro aka m0yv is a multi-functional backdoor written in C++.
backdoor expiro

Expiro payload 1 IoCs

backdoor

resource	yara_rule
behavioral2/memory/1248-3-0x0000000000400000-0x00000000006A3000-memory.dmp	family_expiro1

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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	JaffaCakes118_6394bcb9eeb8524dafdc15efe191d940.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\Adobe\ARM\1.0\Temp	AdobeARM.exe
File opened for modification	C:\Program Files (x86)\Common Files\Adobe\ARM\1.0\Backup	AdobeARM.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 2 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	JaffaCakes118_6394bcb9eeb8524dafdc15efe191d940.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AdobeARM.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1248	JaffaCakes118_6394bcb9eeb8524dafdc15efe191d940.exe
1248	JaffaCakes118_6394bcb9eeb8524dafdc15efe191d940.exe
1248	JaffaCakes118_6394bcb9eeb8524dafdc15efe191d940.exe
1248	JaffaCakes118_6394bcb9eeb8524dafdc15efe191d940.exe
1248	JaffaCakes118_6394bcb9eeb8524dafdc15efe191d940.exe
1248	JaffaCakes118_6394bcb9eeb8524dafdc15efe191d940.exe
1248	JaffaCakes118_6394bcb9eeb8524dafdc15efe191d940.exe
1248	JaffaCakes118_6394bcb9eeb8524dafdc15efe191d940.exe
1248	JaffaCakes118_6394bcb9eeb8524dafdc15efe191d940.exe
1248	JaffaCakes118_6394bcb9eeb8524dafdc15efe191d940.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4456	AdobeARM.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1248 wrote to memory of 4456	1248	JaffaCakes118_6394bcb9eeb8524dafdc15efe191d940.exe	82
PID 1248 wrote to memory of 4456	1248	JaffaCakes118_6394bcb9eeb8524dafdc15efe191d940.exe	82
PID 1248 wrote to memory of 4456	1248	JaffaCakes118_6394bcb9eeb8524dafdc15efe191d940.exe	82
PID 4456 wrote to memory of 4628	4456	AdobeARM.exe	84
PID 4456 wrote to memory of 4628	4456	AdobeARM.exe	84
PID 4456 wrote to memory of 4628	4456	AdobeARM.exe	84

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6394bcb9eeb8524dafdc15efe191d940.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6394bcb9eeb8524dafdc15efe191d940.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1248
- C:\Program Files (x86)\Common Files\Adobe\ARM\1.0\AdobeARM.exe
  "C:\Program Files (x86)\Common Files\Adobe\ARM\1.0\AdobeARM.exe"
  2⤵
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4456
- - C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\Reader_sl.exe
    "C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\Reader_sl.exe"
    3⤵
    PID:4628

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

ArmReport.ini

Path C:\ProgramData\Adobe\ARM\ArmReport.ini
Size 746B
SHA256 d33f7174ff6e717d72bfb38cf92e25135823d3d02273bf3f575f95d2afdc12dc
MD5 5757246b0746f04f7c6c7685c433d80f
SHA1 910a75876285c35fe0fa03c11f36257aeba8a2b3
SHA512 8f2f3642154d4f016f7679567cc5879e8d4a794a07b62b9663905406a77aebb111b04032353588719a631d9e5223acf543499ef7f7b36e0e15ec966c638219f4
MD5 SHA1 SHA512

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AdobeARM.log

Path C:\Users\Admin\AppData\Local\Temp\AdobeARM.log
Size 358B
SHA256 a615e92900d80cb27dbf0bcb451186f9fb7c7e6a5b82224ab288ae2fa5c50dc5
MD5 67d3e66f5dcae24d66b2da5509ad1b26
SHA1 3a7db69912133e83a988d50d96d990f12ef9197f
SHA512 fccba5bf644c290362ca4a82bb53c5111c25328dc171cf62cb4eb80ebd091e592c1c90fa83a899b8d5d80ebb5140a3f8528ef039f02f3e656a74c8704efb5afe
MD5 SHA1 SHA512

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ArmUI.ini

Path C:\Users\Admin\AppData\Local\Temp\ArmUI.ini
Size 251KB
SHA256 b4d4dcd9594d372d7c0c975d80ef5802c88502895ed4b8a26ca62e225f2f18b0
MD5 864c22fb9a1c0670edf01c6ed3e4fbe4
SHA1 bf636f8baed998a1eb4531af9e833e6d3d8df129
SHA512 ff23616ee67d51daa2640ae638f59a8d331930a29b98c2d1bd3b236d2f651f243f9bae38d58515714886cfbb13b9be721d490aad4f2d10cbba74d7701ab34e09
SSDEEP 3072:wT4DJAvCXkQqSmSgojgTaDuK1+4xKtaU/QX5Pm9vR549QHmYPCjTMNro0Jnxu4Fn:xvUzH5
MD5 SHA1 SHA512 SSDEEP

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TmpD3BB.tmp

Path C:\Users\Admin\AppData\Local\Temp\TmpD3BB.tmp
Size 3KB
SHA256 ff9b4cf04e3202f150f19c1711767361343935da7841c98b876c42fd2cabce9b
MD5 bbb796dd2b53f7fb7ce855bb39535e2f
SHA1 dfb022a179775c82893fe8c4f59df8f6d19bd2fd
SHA512 0d122f454fcbf4524c2756692f0f33dc98f5bd2426839c6f03cd5c5f4fd507a8a15cf489d7a7ceadd1b95cf31b506c04bf03d613a9ba7d76add92766b1dc5c2b
MD5 SHA1 SHA512

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TmpEB6B.tmp

Path C:\Users\Admin\AppData\Local\Temp\TmpEB6B.tmp
Size 3KB
SHA256 19fe53c801ad7edc635f61e9e28d07da31780c2480e6f37ecfc63fffe1b250fe
MD5 ec946860cff4f4a6d325a8de7d6254d2
SHA1 7c909f646d9b2d23c58f73ec2bb603cd59dc11fd
SHA512 38a98b18dbae063bc533a1ff25a3467a7de197651e07e77a1b22cf8ce251282ab31f61dcff5c51ef186cfd115dc506181d480eabffbe92af01dee6282cbee13e
MD5 SHA1 SHA512

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TmpEB9B.tmp

Path C:\Users\Admin\AppData\Local\Temp\TmpEB9B.tmp
Size 3KB
SHA256 dcc9d2695125406282ba990fec39403c44b12964acf51b5e0dc7f2080d714398
MD5 fc2430057cb1be74c788f10c2d4540c8
SHA1 cab67ee8d5191fbf9f25545825e06c1a822af2f2
SHA512 4e2b9709a9e3ca5173abb35816e5a0aebbf2a7aaf971d7f75f3ae66e4a812cbade103baa5016525f5ab83a60c18f8d3c278c90ff83e4afdae419f81673cb5aee
MD5 SHA1 SHA512

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TmpEDFE.tmp

Path C:\Users\Admin\AppData\Local\Temp\TmpEDFE.tmp
Size 3KB
SHA256 aabf92089e16fdb28706356dbc4efb5a81f5277946f2e67695b31676616ed2d2
MD5 a58599260c64cb41ed7d156db8ac13ef
SHA1 fb9396eb1270e9331456a646ebf1419fc283dc06
SHA512 6970cbc42e7ec64ccdb8e5633b7017b1e9ec0d4ad094869e221e9275b814b1442b84827996190159543bdb5e86df6885c45197c533d657db4660fca8ad761a71
MD5 SHA1 SHA512

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memory/1248-0-0x0000000000400000-0x00000000006A3000-memory.dmp

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memory/1248-1-0x0000000000414000-0x0000000000415000-memory.dmp

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memory/1248-3-0x0000000000400000-0x00000000006A3000-memory.dmp

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