ermac | dadf2f59ba0336e468370144affe3ac67c26107ed1d596acb9cf35956a56c1b9

General

Target

dadf2f59ba0336e468370144affe3ac67c26107ed1d596acb9cf35956a56c1b9.apk
Size

1.7MB
MD5

8ac1d0861cbee7940253e4b8f0a1784c
SHA1

d93270a4ed0b73c1c9de5250aa6b59277ebb228b
SHA256

dadf2f59ba0336e468370144affe3ac67c26107ed1d596acb9cf35956a56c1b9
SHA512

168c8070a103a3c8bcfbe8a4fbcbbb35a0769634d23ca922d3b0e5dd8d02d61d5220a01e6e6845b97b26aaa8a4ca28f80ff6659459abfff7c0c6c63450a9225b
SSDEEP

24576:9lkEBm5zFdCJ62zpHAB4ZAbZOtLEZL2ELlKVm8t9RVxtcbifJiVkggSRvb:9lkyOdozpW9bZkkLlWm8DRKbikVdgS1

Score

10^/10

ermac hook banker defense_evasion discovery evasion execution impact infostealer persistence rat trojan

Malware Config

Extracted

Family

ermac

C2

http://154.90.62.12

AES_key

Extracted

Family

hook

C2

http://154.90.62.12

AES_key

Signatures

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

Ermac2 payload 1 IoCs

resource	yara_rule
behavioral1/memory/4271-0.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 1 IoCs

Runs executable file dropped to the device during analysis.

evasion

Download New Code at Runtime

T1407

ioc	pid	Process
Anonymous-DexFile@0xd3ff5000-0xd41ffb98	4271	com.tencent.mm

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

Acquires the wake lock 1 IoCs

description	ioc	Process
Framework service call	android.os.IPowerManager.acquireWakeLock	com.tencent.mm

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.

defense_evasion persistence

Foreground Persistence

T1541

description	ioc	Process
Framework service call	android.app.IActivityManager.setServiceForeground	com.tencent.mm

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.tencent.mm

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.tencent.mm

Reads information about phone network operator. 1 TTPs
discovery

System Network Configuration Discovery
T1422

Requests disabling of battery optimizations (often used to enable hiding in the background). 1 TTPs 1 IoCs

defense_evasion

User Evasion

T1628.002

description	ioc	Process
Intent action	android.settings.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS	com.tencent.mm

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.tencent.mm

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.tencent.mm

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.tencent.mm

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.tencent.mm

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.tencent.mm

com.tencent.mm
1⤵
- Loads dropped Dex/Jar
- Acquires the wake lock
- Makes use of the framework's foreground persistence service
- Queries information about the current Wi-Fi connection
- Queries the mobile country code (MCC)
- Requests disabling of battery optimizations (often used to enable hiding in the background).
- 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:4271

Network

MITRE ATT&CK Mobile v15

Initial Access

Execution

Scheduled Task/Job

1

T1603

Persistence

Event Triggered Execution

1

T1624

Broadcast Receivers

1

T1624.001

Foreground Persistence

Scheduled Task/Job

Privilege Escalation

Defense Evasion

Download New Code at Runtime

1

T1407

Foreground Persistence

1

T1541

Hide Artifacts

1

T1628

User Evasion

1

T1628.002

Virtualization/Sandbox Evasion

2

T1633

System Checks

2

T1633.001

Credential Access

Discovery

Software Discovery

1

T1418

Security Software Discovery

1

T1418.001

System Information Discovery

2

T1426

System Network Configuration Discovery

2

T1422

System Network Connections Discovery

1

T1421

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Data Encrypted for Impact

1

T1471

Replay Monitor

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Downloads

/data/data/com.tencent.mm/.google/libgooglev1.so

Filesize
314KB

MD5
0697d041afd8f5e6101235ea8bb2e0ee

SHA1
d2fd74bc613c0bbb66ed006ac7f8714a47733b8d

SHA256
e42828f8959a3a4bdd35305bfc6e018ede8bcdcd48d75f2056831341a40b5da9

SHA512
2c53992f7ba7ffdfae7ff44ce56cc2249db0991d1b0337312b79fbb9dd5984a216901d2a0936b4f9e8cd9039129500afe67e1f9cfba7abf652cd4c3b1fae5500

Download Submit
/data/data/com.tencent.mm/no_backup/androidx.work.workdb

Filesize
4KB

MD5
f2b4b0190b9f384ca885f0c8c9b14700

SHA1
934ff2646757b5b6e7f20f6a0aa76c7f995d9361

SHA256
0a8ffb6b327963558716e87db8946016d143e39f895fa1b43e95ba7032ce2514

SHA512
ec12685fc0d60526eed4d38820aad95611f3e93ae372be5a57142d8e8a1ba17e6e5dfe381a4e1365dddc0b363c9c40daaffdc1245bd515fddac69bf1abacd7f1

Download Submit
/data/data/com.tencent.mm/no_backup/androidx.work.workdb-journal

Filesize
512B

MD5
2b2e73562d9850baecc6ef93c930fa47

SHA1
bf5a9d6a5edb988f31d8468f8c72d9008f3096a8

SHA256
46ff2ee6f3d7c3be88a2d7922268f94f94027b15960776ea601a39eab7507541

SHA512
038988e5286ee930e537113929f4c24cfdba12684f41a4fbc60064a4fa9e06cfa76128497a38a4eafaac79cc6c8ce6f971a31925762b045d290dd402db932497

Download Submit
/data/data/com.tencent.mm/no_backup/androidx.work.workdb-shm

Filesize
32KB

MD5
bb7df04e1b0a2570657527a7e108ae23

SHA1
5188431849b4613152fd7bdba6a3ff0a4fd6424b

SHA256
c35020473aed1b4642cd726cad727b63fff2824ad68cedd7ffb73c7cbd890479

SHA512
768007e06b0cd9e62d50f458b9435c6dda0a6d272f0b15550f97c478394b743331c3a9c9236e09ab5b9cb3b423b2320a5d66eb3c7068db9ea37891ca40e47012

Download Submit
/data/data/com.tencent.mm/no_backup/androidx.work.workdb-wal

Filesize
16KB

MD5
1620db3e636b02219175b0656e0c51aa

SHA1
6daf08bab4cc25df56329ecd175b5093244630a7

SHA256
59b3e8b27be831d51d2d89a4054ea0a1ebb489ebf1af5169124d8fbb5bff6f2e

SHA512
b28c2e7e3c2debe691501446759a30a8228a2af4d2fac0b694d3c216aa27ce857ae9b61568ca5959f079af99bcd3d0af07e689a12fb91c0e11fe4d1ff0c3d31d

Download Submit
/data/data/com.tencent.mm/no_backup/androidx.work.workdb-wal

Filesize
112KB

MD5
1a8ca12defb6c7ee6b1efc9731fe1cee

SHA1
c0e2659515b4deeb38acad4ebb82ce9b806dd735

SHA256
50d58f45293844dc9942fadf81f9a58eda2aa37c260bd81691ceac8e0f53e5b4

SHA512
d82e6fa17f988cb4240cd9bcafe9fc96b9e8df26fc3a5ef14aa9e9b1625cdb31a8cfa91f6db47c6266b36a6ac20913a78e37b7a39210a9f6bcf60cc803f45817

Download Submit
/data/data/com.tencent.mm/no_backup/androidx.work.workdb-wal

Filesize
185KB

MD5
20ab2286415a754d8bb966341d8728bf

SHA1
55fe6e612208f205dd2ef8136fa9827aa11fcc4c

SHA256
f1570e492d3a95ad06dac8b98a749c90d202ba934c65f86acab3d378e2e46d38

SHA512
0b810604a6eb6ef3004816d4c1dd0fd2d65193d3fa0da6de6b330c036dd50d0c8c73e4fec0d6176315f7e11da517ab2e3e1d0fefc3fb7b21622a03742dbf8127

Download Submit
Anonymous-DexFile@0xd3ff5000-0xd41ffb98

Filesize
2.0MB

MD5
40cb56a4d76414296a84bfed60b6c127

SHA1
6b2a5132dd77022708b2b9959737f8377a93a465

SHA256
9364ddf46fe1bf90cebac61bc7cbba8707de8158ce444a8fb43220dd50d0699d

SHA512
ea743dbf8e188e17589a443c49bbd07d5ebef8edd8a02b40f32bdd9fdbfcdcc63e298f6c4cbd27cfcd9033fc9382b30b0c5fec3e60e400f2dca34a40f5815a02

Download Submit

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Mobile v15

Replay Monitor

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Downloads