ermac | b58aba397abcaed42099ebf7b34bef8b98c7dbdef2a6a0a47478524d7351f49b

Analysis

max time kernel
149s
max time network
155s
platform
android-9_x86
resource
android-x86-arm-20240910-en
resource tags

arch:armarch:x86image:android-x86-arm-20240910-enlocale:en-usos:android-9-x86system
submitted
14-01-2025 22:01

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General

Target

b58aba397abcaed42099ebf7b34bef8b98c7dbdef2a6a0a47478524d7351f49b.apk
Size

2.7MB
MD5

62b9641de1f466642cd27bb04dfab99f
SHA1

fa6453e59edfcaa2905f6caa6d7744a4279b0e33
SHA256

b58aba397abcaed42099ebf7b34bef8b98c7dbdef2a6a0a47478524d7351f49b
SHA512

76c207aa922fd9472f28025a33b36db5b150de53f47735005ebff91992dc7403d8b9ecf994d187f1e8008a448c4c5d87507a26de5265212a1b46c6f4f75d6f32
SSDEEP

49152:y5p2a3rgaSLPjVi9P7WaMDM7Mm5zy/sJfj2R4spqHSxl5YDVN7wwfX0GX6d2qh:i2a/KVi1FMDaMZ/slg4mqc5YD30QJXe/

Score

10^/10

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

Malware Config

Extracted

Family

ermac

http://154.216.18.137

AES_key

Extracted

Family

hook

http://154.216.18.137

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/4237-0.dex	family_ermac2
behavioral1/memory/4211-0.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.zzkasaslkasata.kuri/app_drip/mRNHWd.json	4237	/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.zzkasaslkasata.kuri/app_drip/mRNHWd.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.zzkasaslkasata.kuri/app_drip/oat/x86/mRNHWd.odex --compiler-filter=quicken --class-loader-context=&
/data/user/0/com.zzkasaslkasata.kuri/app_drip/mRNHWd.json	4211	com.zzkasaslkasata.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.findAccessibilityNodeInfosByText	com.zzkasaslkasata.kuri
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId	com.zzkasaslkasata.kuri
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfoByAccessibilityId	com.zzkasaslkasata.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.zzkasaslkasata.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.zzkasaslkasata.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.zzkasaslkasata.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.zzkasaslkasata.kuri
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.zzkasaslkasata.kuri
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.zzkasaslkasata.kuri
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.zzkasaslkasata.kuri
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.zzkasaslkasata.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.zzkasaslkasata.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.zzkasaslkasata.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.zzkasaslkasata.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.zzkasaslkasata.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.zzkasaslkasata.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.zzkasaslkasata.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.zzkasaslkasata.kuri

com.zzkasaslkasata.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:4211
- /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.zzkasaslkasata.kuri/app_drip/mRNHWd.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.zzkasaslkasata.kuri/app_drip/oat/x86/mRNHWd.odex --compiler-filter=quicken --class-loader-context=&
  2⤵
  - Loads dropped Dex/Jar
  PID:4237

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

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Downloads

/data/data/com.zzkasaslkasata.kuri/app_drip/mRNHWd.json

Filesize
736KB

MD5
8b6c73d0a2aa321394cfc51e85881cce

SHA1
15978d65e2b7dc950743b533119648803fa52673

SHA256
d40b773c104a3590e5f5d1e6f8438ace5cf168db965a77e5e2cfc7a326afe721

SHA512
45de74a2c0bd82c3ecf3980810196daaeb4bcf829782005ee1cd174eb3e5104c95eea116157441389305f40a3029514f4b28faa7bb1b0aad343d520710eb9bc1

Download Submit
/data/data/com.zzkasaslkasata.kuri/app_drip/mRNHWd.json

Filesize
736KB

MD5
cc89e32f2ce0756c4fc6be242b0c8bda

SHA1
fa0e843a6209db6b321ba80a978eaea744a7458e

SHA256
d17d65e64c8e7bce294b7d02f3f79c9ce8a6448c08755f7fe69a932fa54bede1

SHA512
5c5a2bb39c7641c2993a10ab5f737ff6b1dc8a99f26a647385ff497495f7b745c5f8441a572f9bd14f6c791afc920afeed2d2b576ba413b092e80ae616647244

Download Submit
/data/data/com.zzkasaslkasata.kuri/app_drip/oat/mRNHWd.json.cur.prof

Filesize
3KB

MD5
5df109a5473f48ff15ce5d5d1a19cd55

SHA1
d73ed77cd30b47213b82bfedfb3bec5b7da18359

SHA256
f99ebc3583bcf698b504311f1b910e424268d46734d2f867047e3190e1b219d6

SHA512
56a74e9ce85f50fb9d46083c07f198d6bcf4249962e9661cc76edfb13d0a1000b85b3e2d333a20d5f6a84b2041adc7786ad43047acd791c30fa376964fe3fb9e

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

Filesize
4KB

MD5
f2b4b0190b9f384ca885f0c8c9b14700

SHA1
934ff2646757b5b6e7f20f6a0aa76c7f995d9361

SHA256
0a8ffb6b327963558716e87db8946016d143e39f895fa1b43e95ba7032ce2514

SHA512
ec12685fc0d60526eed4d38820aad95611f3e93ae372be5a57142d8e8a1ba17e6e5dfe381a4e1365dddc0b363c9c40daaffdc1245bd515fddac69bf1abacd7f1

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

Filesize
512B

MD5
039cb8c24e83ea7bfe937d3a7c42e544

SHA1
1ebeefeb8d6e99f68b2d575724220f4c7550e4ae

SHA256
e15e7ee76f0673971d80fd598441c5746107bd8c3a39cd9a4b84900ef0297883

SHA512
a2e38e830e5af44f823cb9f504d3d905b1c2eeb804e80a7866a2b1f33c63e3c84180a7dc3bf29968eebaee1463ec564df7c37de96304ef8055afd195f8b9a028

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

Filesize
32KB

MD5
bb7df04e1b0a2570657527a7e108ae23

SHA1
5188431849b4613152fd7bdba6a3ff0a4fd6424b

SHA256
c35020473aed1b4642cd726cad727b63fff2824ad68cedd7ffb73c7cbd890479

SHA512
768007e06b0cd9e62d50f458b9435c6dda0a6d272f0b15550f97c478394b743331c3a9c9236e09ab5b9cb3b423b2320a5d66eb3c7068db9ea37891ca40e47012

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

Filesize
108KB

MD5
3a087271aa6fe6902a86347d3b2611cf

SHA1
b5fe568d237ae60dbe396e0c3e238745c7933816

SHA256
4a7fc85008207016d813559088876b01198ad42715db3d25c56c3b34d7194da3

SHA512
6f0cb9602ec98e73fa702cd2e1959e372f177551c20e77f941a5751d3f100b344fa8d129cb52f4b851d466de9b036e84a22775c6852efe9c376e94da3d45f34c

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

Filesize
173KB

MD5
ab68a6b8c32c905a1bdd0f2545da3c4b

SHA1
f433522b751c4cc59861eb7d76da2ff9ed3e652e

SHA256
8804a882faba10e9b31fdc635e63afe267cf63b5eaaae69e8463ca14e699f8d3

SHA512
39a1d031dc25cf883a8972208108edce7be9bc8d8eabd1db04697b18fff588cb14a7bd1efd31ee63c3d9fcdb2b113f079101c5d3fdb60086c6c5851d55eb5b25

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

Filesize
16KB

MD5
deb71fd2faf80ce0171618ecb66a74c1

SHA1
8e6e7a5f102aadd7fc73e11b0a2182e9ffa10ae5

SHA256
c5e990a7d586a04e819d1f7b7f0304467a9277da0bd4dad09e667496b7406e59

SHA512
b937ca10395798ec1b981fd47619b24e660842041e474ee2521696f0b993bc7411e242f0639c71d613c336f7fc53bd5c9d517b83ddc256121e6505cfd285835e

Download Submit
/data/user/0/com.zzkasaslkasata.kuri/app_drip/mRNHWd.json

Filesize
1.7MB

MD5
2fdcd083467d681ba9ede727636fac9e

SHA1
22448c53d7572bfab6532863cd5b20b128f8d70a

SHA256
dab01f5ec2ef21a5b2fc3e98766b6ac5c2c758c4fdf72c93aa6ba4263d39cf46

SHA512
8a59e603e7f786632214135f82baa2b13b001f1ae47ec479808fc0fa393e5c90bf95a9ffa47f5c8a5ad1562cea1b201661ab0fbb099336e6dfa8b76f817b663e

Download Submit
/data/user/0/com.zzkasaslkasata.kuri/app_drip/mRNHWd.json

Filesize
1.7MB

MD5
1ddedde67f70d4941da285e210da50a2

SHA1
939e3501285edf555d648284998df8be9f1f97ef

SHA256
da4946dcb546e0db61339cd3d0e8129cea24091700f6fc627bf32872d3f7c5c7

SHA512
7e32ee928ebbb34e56d55edd7058ed9e886891a24a41e6f4882258046bb5b2a16548743bd8945932e977e29fb47a564f022d9e1f5a435d5ab8a8141501c6a3ef

Download Submit

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Mobile v15

Replay Monitor

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Downloads