nymaim | ea5f8b8f396dba0ada4bba7a7864acb493ea64609a84041ef3c9945d1c4484d9

Analysis

max time kernel
91s
max time network
99s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
21/10/2022, 01:09

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General

Target

ea5f8b8f396dba0ada4bba7a7864acb493ea64609a84041ef3c9945d1c4484d9.exe
Size

2.3MB
MD5

a49022b618deac19beba2b35e0bccce9
SHA1

51786172812f7a465534fd5173816a832a3b6e81
SHA256

ea5f8b8f396dba0ada4bba7a7864acb493ea64609a84041ef3c9945d1c4484d9
SHA512

4afeefe3da4af75ef125af5f6ecb59e8232d76fb27e43f910b1f03ee236bf433bf6efc53e51e894eece950e4b891cf4ccf807f52d7635746d8ceed7a03ce500b
SSDEEP

49152:Z2GzEiOIkqjwAzx5nfFJHL2XtIRYpQmYfEyHNrIx4A5hq:MGzJfjlzNJi9EKY8HDq

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

45.15.156.54

85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim

Executes dropped EXE 3 IoCs

pid	Process
1956	is-TOPTO.tmp
944	ejsearcher53.exe
972	jey8wV.exe

Loads dropped DLL 6 IoCs

pid	Process
576	ea5f8b8f396dba0ada4bba7a7864acb493ea64609a84041ef3c9945d1c4484d9.exe
1956	is-TOPTO.tmp
1956	is-TOPTO.tmp
1956	is-TOPTO.tmp
1956	is-TOPTO.tmp
944	ejsearcher53.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 12 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\ejSearcher\unins000.dat	is-TOPTO.tmp
File created	C:\Program Files (x86)\ejSearcher\is-980K3.tmp	is-TOPTO.tmp
File created	C:\Program Files (x86)\ejSearcher\is-DC46N.tmp	is-TOPTO.tmp
File created	C:\Program Files (x86)\ejSearcher\is-6R6KV.tmp	is-TOPTO.tmp
File created	C:\Program Files (x86)\ejSearcher\is-K4DIH.tmp	is-TOPTO.tmp
File opened for modification	C:\Program Files (x86)\ejSearcher\ejsearcher53.exe	is-TOPTO.tmp
File created	C:\Program Files (x86)\ejSearcher\is-JKR35.tmp	is-TOPTO.tmp
File created	C:\Program Files (x86)\ejSearcher\is-FJ6UU.tmp	is-TOPTO.tmp
File created	C:\Program Files (x86)\ejSearcher\is-KECF2.tmp	is-TOPTO.tmp
File created	C:\Program Files (x86)\ejSearcher\is-DK2Q1.tmp	is-TOPTO.tmp
File created	C:\Program Files (x86)\ejSearcher\is-H5TLK.tmp	is-TOPTO.tmp
File opened for modification	C:\Program Files (x86)\ejSearcher\unins000.dat	is-TOPTO.tmp

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

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
1124	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
944	ejsearcher53.exe
944	ejsearcher53.exe
944	ejsearcher53.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1124	taskkill.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 576 wrote to memory of 1956	576	ea5f8b8f396dba0ada4bba7a7864acb493ea64609a84041ef3c9945d1c4484d9.exe	26
PID 576 wrote to memory of 1956	576	ea5f8b8f396dba0ada4bba7a7864acb493ea64609a84041ef3c9945d1c4484d9.exe	26
PID 576 wrote to memory of 1956	576	ea5f8b8f396dba0ada4bba7a7864acb493ea64609a84041ef3c9945d1c4484d9.exe	26
PID 576 wrote to memory of 1956	576	ea5f8b8f396dba0ada4bba7a7864acb493ea64609a84041ef3c9945d1c4484d9.exe	26
PID 576 wrote to memory of 1956	576	ea5f8b8f396dba0ada4bba7a7864acb493ea64609a84041ef3c9945d1c4484d9.exe	26
PID 576 wrote to memory of 1956	576	ea5f8b8f396dba0ada4bba7a7864acb493ea64609a84041ef3c9945d1c4484d9.exe	26
PID 576 wrote to memory of 1956	576	ea5f8b8f396dba0ada4bba7a7864acb493ea64609a84041ef3c9945d1c4484d9.exe	26
PID 1956 wrote to memory of 944	1956	is-TOPTO.tmp	27
PID 1956 wrote to memory of 944	1956	is-TOPTO.tmp	27
PID 1956 wrote to memory of 944	1956	is-TOPTO.tmp	27
PID 1956 wrote to memory of 944	1956	is-TOPTO.tmp	27
PID 944 wrote to memory of 972	944	ejsearcher53.exe	30
PID 944 wrote to memory of 972	944	ejsearcher53.exe	30
PID 944 wrote to memory of 972	944	ejsearcher53.exe	30
PID 944 wrote to memory of 972	944	ejsearcher53.exe	30
PID 944 wrote to memory of 836	944	ejsearcher53.exe	31
PID 944 wrote to memory of 836	944	ejsearcher53.exe	31
PID 944 wrote to memory of 836	944	ejsearcher53.exe	31
PID 944 wrote to memory of 836	944	ejsearcher53.exe	31
PID 836 wrote to memory of 1124	836	cmd.exe	33
PID 836 wrote to memory of 1124	836	cmd.exe	33
PID 836 wrote to memory of 1124	836	cmd.exe	33
PID 836 wrote to memory of 1124	836	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\ea5f8b8f396dba0ada4bba7a7864acb493ea64609a84041ef3c9945d1c4484d9.exe
"C:\Users\Admin\AppData\Local\Temp\ea5f8b8f396dba0ada4bba7a7864acb493ea64609a84041ef3c9945d1c4484d9.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:576
- C:\Users\Admin\AppData\Local\Temp\is-GUSE5.tmp\is-TOPTO.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-GUSE5.tmp\is-TOPTO.tmp" /SL4 $70022 "C:\Users\Admin\AppData\Local\Temp\ea5f8b8f396dba0ada4bba7a7864acb493ea64609a84041ef3c9945d1c4484d9.exe" 2113083 52736
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1956
- - C:\Program Files (x86)\ejSearcher\ejsearcher53.exe
    "C:\Program Files (x86)\ejSearcher\ejsearcher53.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:944
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jey8wV.exe
      4⤵
      Executes dropped EXE
      PID:972
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "ejsearcher53.exe" /f & erase "C:\Program Files (x86)\ejSearcher\ejsearcher53.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:836
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "ejsearcher53.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1124

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\ejSearcher\ejsearcher53.exe

Filesize
3.8MB

MD5
d01f31dc6d74bcbb4ff30f5e4ecc23f3

SHA1
21b864a9f1d0cf65be69af4d150ee3825d5ac472

SHA256
62e569f77a00bf73f51fbe509ad5a5b23b4b9d0d7e44da5c5ea0981673d26fe2

SHA512
aeaaffaafa4fde9433acbfad84702cce7d263d333fa224c87406d199a5215c72b7a5fd91772faf309ba05d75a31a0b6a645f6a14cd969492e895baa94b3bf6e3

Download Submit
C:\Program Files (x86)\ejSearcher\ejsearcher53.exe

Filesize
3.8MB

MD5
d01f31dc6d74bcbb4ff30f5e4ecc23f3

SHA1
21b864a9f1d0cf65be69af4d150ee3825d5ac472

SHA256
62e569f77a00bf73f51fbe509ad5a5b23b4b9d0d7e44da5c5ea0981673d26fe2

SHA512
aeaaffaafa4fde9433acbfad84702cce7d263d333fa224c87406d199a5215c72b7a5fd91772faf309ba05d75a31a0b6a645f6a14cd969492e895baa94b3bf6e3

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-GUSE5.tmp\is-TOPTO.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-GUSE5.tmp\is-TOPTO.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jey8wV.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Program Files (x86)\ejSearcher\ejsearcher53.exe

Filesize
3.8MB

MD5
d01f31dc6d74bcbb4ff30f5e4ecc23f3

SHA1
21b864a9f1d0cf65be69af4d150ee3825d5ac472

SHA256
62e569f77a00bf73f51fbe509ad5a5b23b4b9d0d7e44da5c5ea0981673d26fe2

SHA512
aeaaffaafa4fde9433acbfad84702cce7d263d333fa224c87406d199a5215c72b7a5fd91772faf309ba05d75a31a0b6a645f6a14cd969492e895baa94b3bf6e3

Download Submit
\Users\Admin\AppData\Local\Temp\is-GUSE5.tmp\is-TOPTO.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
\Users\Admin\AppData\Local\Temp\is-KVM81.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-KVM81.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-KVM81.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jey8wV.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/576-86-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/576-55-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/576-54-0x0000000075911000-0x0000000075913000-memory.dmp

Filesize
8KB

Download
memory/576-58-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/944-71-0x0000000000400000-0x00000000015C4000-memory.dmp

Filesize
17.8MB

Download
memory/944-73-0x0000000000400000-0x00000000015C4000-memory.dmp

Filesize
17.8MB

Download
memory/944-72-0x0000000000400000-0x00000000015C4000-memory.dmp

Filesize
17.8MB

Download
memory/944-78-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/944-82-0x0000000000400000-0x00000000015C4000-memory.dmp

Filesize
17.8MB

Download
memory/944-85-0x0000000000400000-0x00000000015C4000-memory.dmp

Filesize
17.8MB

Download
memory/1956-74-0x0000000003220000-0x00000000043E4000-memory.dmp

Filesize
17.8MB

Download
memory/1956-70-0x0000000003220000-0x00000000043E4000-memory.dmp

Filesize
17.8MB

Download