ermac | 913c3f5a4ac477a4d3b22828cb7b34c19bb483d76c9e34fea2c2c2a839bc6d6f

Analysis

max time kernel
129s
max time network
154s
platform
android_x86
resource
android-x86-arm-20240624-en
resource tags

androidarch:armarch:x86image:android-x86-arm-20240624-enlocale:en-usos:android-9-x86system
submitted
16-01-2025 04:15

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General

Target

913c3f5a4ac477a4d3b22828cb7b34c19bb483d76c9e34fea2c2c2a839bc6d6f.apk
Size

3.1MB
MD5

567b35b4761c2ba1d892138c301b1101
SHA1

64b8e8d590402ba162fa2e8c446ec30de33d6caa
SHA256

913c3f5a4ac477a4d3b22828cb7b34c19bb483d76c9e34fea2c2c2a839bc6d6f
SHA512

0a42739323f2daf57ddc6aaad9aac292573505477f64ce3c89fe60ccab3eca36e4efec3a3f339cc27fb47537cbdb91af9b384fbe1842d0dd2ad30432c37cdb7f
SSDEEP

98304:B05FVxjEHmnwGDKxlMMW7JUkk6dH8FMkw+/IzkCpht:BmxQGFDe+7Wtan+/Ixt

Score

10^/10

ermac hook banker collection credential_access discovery evasion execution impact infostealer persistence rat trojan

Malware Config

Extracted

Family

ermac

http://154.216.17.69

AES_key

Extracted

Family

hook

http://154.216.17.69

AES_key

Signatures

Ermac
An Android banking trojan first seen in July 2021.
banker trojan infostealer ermac
Ermac family
ermac

Ermac2 payload 2 IoCs

resource	yara_rule
behavioral1/memory/4278-0.dex	family_ermac2
behavioral1/memory/4253-0.dex	family_ermac2

Hook
Hook is an Android malware that is based on Ermac with RAT capabilities.
rat trojan infostealer hook
Hook family
hook

Loads dropped Dex/Jar 1 TTPs 2 IoCs

Runs executable file dropped to the device during analysis.

evasion

Download New Code at Runtime

T1407

ioc	pid	Process
/data/user/0/com.fsaslkasata.kuri/app_shed/LB.json	4278	/system/bin/dex2oat --instruction-set=x86 --instruction-set-features=ssse3,-sse4.1,-sse4.2,-avx,-avx2,-popcnt --runtime-arg -Xhidden-api-checks --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --instruction-set-variant=x86 --instruction-set-features=default --inline-max-code-units=0 --compact-dex-level=none --dex-file=/data/user/0/com.fsaslkasata.kuri/app_shed/LB.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.fsaslkasata.kuri/app_shed/oat/x86/LB.odex --compiler-filter=quicken --class-loader-context=&
/data/user/0/com.fsaslkasata.kuri/app_shed/LB.json	4253	com.fsaslkasata.kuri

Makes use of the framework's Accessibility service 4 TTPs 3 IoCs

Retrieves information displayed on the phone screen using AccessibilityService.

collection evasion credential_access

Input Injection

T1516

Screen Capture

T1513

Keylogging

T1417.001

GUI Input Capture

T1417.002

description	ioc	Process
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfoByAccessibilityId	com.fsaslkasata.kuri
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText	com.fsaslkasata.kuri
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId	com.fsaslkasata.kuri

Queries a list of all the installed applications on the device (Might be used in an attempt to overlay legitimate apps) 1 TTPs
banker discovery

Security Software Discovery
T1418.001

Queries information about running processes on the device 1 TTPs 1 IoCs

Application may abuse the framework's APIs to collect information about running processes on the device.

discovery

Process Discovery

T1424

description	ioc	Process
Framework service call	android.app.IActivityManager.getRunningAppProcesses	com.fsaslkasata.kuri

Queries the phone number (MSISDN for GSM devices) 1 TTPs
discovery

System Network Configuration Discovery
T1422

Acquires the wake lock 1 IoCs

description	ioc	Process
Framework service call	android.os.IPowerManager.acquireWakeLock	com.fsaslkasata.kuri

Makes use of the framework's foreground persistence service 1 TTPs 1 IoCs

Application may abuse the framework's foreground service to continue running in the foreground.

evasion persistence

Foreground Persistence

T1541

description	ioc	Process
Framework service call	android.app.IActivityManager.setServiceForeground	com.fsaslkasata.kuri

Performs UI accessibility actions on behalf of the user 1 TTPs 5 IoCs

Application may abuse the accessibility service to prevent their removal.

evasion

Prevent Application Removal

T1629.001

ioc	Process
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.fsaslkasata.kuri
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.fsaslkasata.kuri
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.fsaslkasata.kuri
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.fsaslkasata.kuri
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.fsaslkasata.kuri

Queries information about the current Wi-Fi connection 1 TTPs 1 IoCs

Application may abuse the framework's APIs to collect information about the current Wi-Fi connection.

discovery

System Network Connections Discovery

T1421

description	ioc	Process
Framework service call	android.net.wifi.IWifiManager.getConnectionInfo	com.fsaslkasata.kuri

Queries the mobile country code (MCC) 1 TTPs 1 IoCs

discovery

System Network Configuration Discovery

T1422

description	ioc	Process
Framework service call	com.android.internal.telephony.ITelephony.getNetworkCountryIsoForPhone	com.fsaslkasata.kuri

Reads information about phone network operator. 1 TTPs
discovery

System Network Configuration Discovery
T1422

Registers a broadcast receiver at runtime (usually for listening for system events) 1 TTPs 1 IoCs

persistence

Broadcast Receivers

T1624.001

description	ioc	Process
Framework service call	android.app.IActivityManager.registerReceiver	com.fsaslkasata.kuri

Schedules tasks to execute at a specified time 1 TTPs 1 IoCs

Application may abuse the framework's APIs to perform task scheduling for initial or recurring execution of malicious code.

execution persistence

Scheduled Task/Job

T1603

description	ioc	Process
Framework service call	android.app.job.IJobScheduler.schedule	com.fsaslkasata.kuri

Uses Crypto APIs (Might try to encrypt user data) 1 TTPs 1 IoCs

impact

Data Encrypted for Impact

T1471

description	ioc	Process
Framework API call	javax.crypto.Cipher.doFinal	com.fsaslkasata.kuri

Checks CPU information 2 TTPs 1 IoCs

System Checks

T1633.001

System Information Discovery

T1426

description	ioc	Process
File opened for read	/proc/cpuinfo	com.fsaslkasata.kuri

Checks memory information 2 TTPs 1 IoCs

System Checks

T1633.001

System Information Discovery

T1426

description	ioc	Process
File opened for read	/proc/meminfo	com.fsaslkasata.kuri

com.fsaslkasata.kuri
1⤵
- Loads dropped Dex/Jar
- Makes use of the framework's Accessibility service
- Queries information about running processes on the device
- Acquires the wake lock
- Makes use of the framework's foreground persistence service
- Performs UI accessibility actions on behalf of the user
- Queries information about the current Wi-Fi connection
- Queries the mobile country code (MCC)
- Registers a broadcast receiver at runtime (usually for listening for system events)
- Schedules tasks to execute at a specified time
- Uses Crypto APIs (Might try to encrypt user data)
- Checks CPU information
- Checks memory information
PID:4253
- /system/bin/dex2oat --instruction-set=x86 --instruction-set-features=ssse3,-sse4.1,-sse4.2,-avx,-avx2,-popcnt --runtime-arg -Xhidden-api-checks --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --instruction-set-variant=x86 --instruction-set-features=default --inline-max-code-units=0 --compact-dex-level=none --dex-file=/data/user/0/com.fsaslkasata.kuri/app_shed/LB.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.fsaslkasata.kuri/app_shed/oat/x86/LB.odex --compiler-filter=quicken --class-loader-context=&
  2⤵
  - Loads dropped Dex/Jar
  PID:4278

Network

MITRE ATT&CK Mobile v15

Initial Access

Execution

Scheduled Task/Job

T1603

Persistence

Event Triggered Execution

T1624

Broadcast Receivers

T1624.001

Foreground Persistence

T1541

Scheduled Task/Job

T1603

Privilege Escalation

Defense Evasion

Download New Code at Runtime

T1407

Foreground Persistence

T1541

Impair Defenses

T1629

Prevent Application Removal

T1629.001

Input Injection

T1516

Virtualization/Sandbox Evasion

T1633

System Checks

T1633.001

Credential Access

Input Capture

T1417

GUI Input Capture

T1417.002

Keylogging

T1417.001

Discovery

Process Discovery

T1424

Software Discovery

T1418

Security Software Discovery

T1418.001

System Information Discovery

T1426

System Network Configuration Discovery

T1422

System Network Connections Discovery

T1421

Lateral Movement

Collection

Input Capture

T1417

GUI Input Capture

T1417.002

Keylogging

T1417.001

Screen Capture

T1513

Command and Control

Exfiltration

Impact

Data Encrypted for Impact

T1471

Input Injection

T1516

Replay Monitor

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Downloads

/data/data/com.fsaslkasata.kuri/app_shed/LB.json

Filesize
735KB

MD5
19dd9a04c41a4a5079fc0fd01a463cd9

SHA1
5bf4efd520550528535a60cb96f997777f89f172

SHA256
b95d00de087834af97723dcad42cd3e28185ce239e9ae422ed96c48c947015c5

SHA512
2cd3187a11af71bc660df9d51e63640dd5353d3b0936f226f4106e21f382e1799843f4ed6c8d87ce3b5fe72c190795476ff6d57be4e538e703bbfadd0e4de8c5

Download Submit
/data/data/com.fsaslkasata.kuri/app_shed/LB.json

Filesize
735KB

MD5
3d57a3bc0cc3f3bcea3bbabac2bf423d

SHA1
6e703b10c76e1cc8b2e85583383a00e42f56d4b4

SHA256
9cf0c3fe66a49d668c75a95b022592cd6815236f82d944cb9a472e0eeab36ca5

SHA512
e428afe928a93f2af1dbe82e88eef462e7beca5f0e268bb728c6da65273acdea37b1e65bc21b67e22a7a5d0ef74f7db06cd9c5daef8e298c98825171ebb1d892

Download Submit
/data/data/com.fsaslkasata.kuri/app_shed/oat/LB.json.cur.prof

Filesize
2KB

MD5
531e7b53c51531cebbc09f469a42baa0

SHA1
fead9f458917043372b20060bff9537b67e8215f

SHA256
8eec5da6d4197763a47037337c0374b355c2b8da24e5dcd320d42e28e11335ab

SHA512
05376b4f824f82b30fb2e2367ab81864712d8e9af7f7101e86792ba74d4f8a8d118b98e850314e71f2dc845d71c753244032ace485c1cbb1e34f6e79383d78b7

Download Submit
/data/data/com.fsaslkasata.kuri/no_backup/androidx.work.workdb

Filesize
4KB

MD5
f2b4b0190b9f384ca885f0c8c9b14700

SHA1
934ff2646757b5b6e7f20f6a0aa76c7f995d9361

SHA256
0a8ffb6b327963558716e87db8946016d143e39f895fa1b43e95ba7032ce2514

SHA512
ec12685fc0d60526eed4d38820aad95611f3e93ae372be5a57142d8e8a1ba17e6e5dfe381a4e1365dddc0b363c9c40daaffdc1245bd515fddac69bf1abacd7f1

Download Submit
/data/data/com.fsaslkasata.kuri/no_backup/androidx.work.workdb-journal

Filesize
512B

MD5
9cd4bfd7d0a7f5d4db13d5fcf98e8189

SHA1
8c31c38661bf5918a666fff806ac632f9b315f31

SHA256
5f8e19c7db99f5d71a2a9c01fe98b6b11379e1ae228f3406fbfa3019d5c496e5

SHA512
e6c13d323d0d8a0e61a62d0696b80855d2c5f9c33b1c48e4fe1a44be2ccdd2851550b1e85668cb71b6de3c145c772a651f5f77529b1a459f4bb11d85004418da

Download Submit
/data/data/com.fsaslkasata.kuri/no_backup/androidx.work.workdb-shm

Filesize
32KB

MD5
bb7df04e1b0a2570657527a7e108ae23

SHA1
5188431849b4613152fd7bdba6a3ff0a4fd6424b

SHA256
c35020473aed1b4642cd726cad727b63fff2824ad68cedd7ffb73c7cbd890479

SHA512
768007e06b0cd9e62d50f458b9435c6dda0a6d272f0b15550f97c478394b743331c3a9c9236e09ab5b9cb3b423b2320a5d66eb3c7068db9ea37891ca40e47012

Download Submit
/data/data/com.fsaslkasata.kuri/no_backup/androidx.work.workdb-wal

Filesize
108KB

MD5
4fe7d2bfec05f40091d60af6bc1c25b4

SHA1
ce55cf6a068cc738c96eac4e07a8d73e2780b586

SHA256
852a369ebb9412a865eb74a5baa52fcbdaee70a9b80c4e49182bfc028c11dd95

SHA512
77a17eaf959e1b048e2ad8ce1830b6f6323e32a2780714ac7d97d2b2cc33808aea933f1bf3d49bd2fb4dcbb8b87459153f6b01e22c6a3b0ebda5631773d1caab

Download Submit
/data/data/com.fsaslkasata.kuri/no_backup/androidx.work.workdb-wal

Filesize
173KB

MD5
394fb9cbab19a3925767edd0b52b1ee1

SHA1
5943cf09a1237fe6934ed4d7d1c21a642af92c3f

SHA256
feb4c987ef7a5dff4c3688654cc553848c59aebf7ec648c6c501b34f2940f1d5

SHA512
6ac55fed1720dd100147bee812961a97f75b49ebc5f62ebcd6fed06611ab96cf641b7b79051f76daefb34ec3548bcbd4f8e3dc3b4f71fdae7878bae7767bdd44

Download Submit
/data/data/com.fsaslkasata.kuri/no_backup/androidx.work.workdb-wal

Filesize
16KB

MD5
55474613c6c58828f942d472cbb8a9df

SHA1
09842f612d69d37f9af68f494a55f4cb252d621c

SHA256
16955f3fec932866dc9186294743fd0c39921ea1a40d5da7fdbddd7308000ce8

SHA512
eddf43a06cd7e7983f62a836ab1e9d1b1b0fa51ffa853adfedc321b587d32d3b09893051910c96dab6b0300adcf1e3369e31623e8b79be739241092145dbc484

Download Submit
/data/user/0/com.fsaslkasata.kuri/app_shed/LB.json

Filesize
1.7MB

MD5
1a767207b9f279b066ee528e6fbb55e0

SHA1
83737766ec897e392d349f5214908d501f506a94

SHA256
73df73b48a9a51618d9628529b88b41a44a1c213804df7fc1c80b56e740ae0fc

SHA512
6a69ac352648ec3e990185d5e74dd3aa0116e9e18ca6523a973af72bb88c69fc8b12d65d2344832b9185cf4aca12ad58a5c6bfd57ffcbf0c98c8f555fa733a5e

Download Submit
/data/user/0/com.fsaslkasata.kuri/app_shed/LB.json

Filesize
1.7MB

MD5
9eccb01fd5e6aa747a3b8fcb38173340

SHA1
77a21894421bbbe4ae767c9b56150c22a380f86a

SHA256
3163ad11d263490feeabaf6d1e83a9cd4f5466a031cc012c02bee0212edd09e3

SHA512
740be2e7273890531c52d94be49ec71ec7045fd38cfcfd6330951125996266832ed2ac13369d18931e8659b251149f3793a3e1f8c66a8b457063b2083c1788e2

Download Submit

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Mobile v15

Replay Monitor

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Downloads