nymaim | bc1a565d38179945379a88be3c1124090e72db026260b97290b21ab4b970caed

Analysis

max time kernel
81s
max time network
84s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
30/10/2022, 03:46

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General

Target

file.exe
Size

2.4MB
MD5

4c11b9e111f2446b24c2521ce5ce21f8
SHA1

0c9e990bdb6fcf644e22b49b7609a49590df6050
SHA256

bc1a565d38179945379a88be3c1124090e72db026260b97290b21ab4b970caed
SHA512

c70999c401398a2d76898927617705bd4acba65aed81d1aff17bb17ea3b2e91bdae1dcffac0ab0945d384c3568be2515b8964f9a6abb4a40ad1de85a3a636647
SSDEEP

49152:Z2bcilxlTK5WAwoCf14oyYNkAzQ1QHH1pB4thzOYzxrzQjrlA5hq:MYMDdpboQ7qhzzVr8eDq

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

45.139.105.171

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
1800	is-L21RN.tmp
1936	ffsearcher64.exe
612	pE42yi.exe

Loads dropped DLL 6 IoCs

pid	Process
1184	file.exe
1800	is-L21RN.tmp
1800	is-L21RN.tmp
1800	is-L21RN.tmp
1800	is-L21RN.tmp
1936	ffsearcher64.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 opened for modification	C:\Program Files (x86)\ffSearcher\ffsearcher64.exe	is-L21RN.tmp
File created	C:\Program Files (x86)\ffSearcher\unins000.dat	is-L21RN.tmp
File created	C:\Program Files (x86)\ffSearcher\is-GDVRR.tmp	is-L21RN.tmp
File created	C:\Program Files (x86)\ffSearcher\is-TUA7R.tmp	is-L21RN.tmp
File created	C:\Program Files (x86)\ffSearcher\is-565V6.tmp	is-L21RN.tmp
File created	C:\Program Files (x86)\ffSearcher\is-3DLM8.tmp	is-L21RN.tmp
File created	C:\Program Files (x86)\ffSearcher\is-3J020.tmp	is-L21RN.tmp
File created	C:\Program Files (x86)\ffSearcher\is-0UFD8.tmp	is-L21RN.tmp
File created	C:\Program Files (x86)\ffSearcher\is-NFM3F.tmp	is-L21RN.tmp
File created	C:\Program Files (x86)\ffSearcher\is-IVVS5.tmp	is-L21RN.tmp
File created	C:\Program Files (x86)\ffSearcher\is-02G70.tmp	is-L21RN.tmp
File opened for modification	C:\Program Files (x86)\ffSearcher\unins000.dat	is-L21RN.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
1984	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1936	ffsearcher64.exe
1936	ffsearcher64.exe
1936	ffsearcher64.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1984	taskkill.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1184 wrote to memory of 1800	1184	file.exe	26
PID 1184 wrote to memory of 1800	1184	file.exe	26
PID 1184 wrote to memory of 1800	1184	file.exe	26
PID 1184 wrote to memory of 1800	1184	file.exe	26
PID 1184 wrote to memory of 1800	1184	file.exe	26
PID 1184 wrote to memory of 1800	1184	file.exe	26
PID 1184 wrote to memory of 1800	1184	file.exe	26
PID 1800 wrote to memory of 1936	1800	is-L21RN.tmp	27
PID 1800 wrote to memory of 1936	1800	is-L21RN.tmp	27
PID 1800 wrote to memory of 1936	1800	is-L21RN.tmp	27
PID 1800 wrote to memory of 1936	1800	is-L21RN.tmp	27
PID 1936 wrote to memory of 612	1936	ffsearcher64.exe	30
PID 1936 wrote to memory of 612	1936	ffsearcher64.exe	30
PID 1936 wrote to memory of 612	1936	ffsearcher64.exe	30
PID 1936 wrote to memory of 612	1936	ffsearcher64.exe	30
PID 1936 wrote to memory of 1368	1936	ffsearcher64.exe	31
PID 1936 wrote to memory of 1368	1936	ffsearcher64.exe	31
PID 1936 wrote to memory of 1368	1936	ffsearcher64.exe	31
PID 1936 wrote to memory of 1368	1936	ffsearcher64.exe	31
PID 1368 wrote to memory of 1984	1368	cmd.exe	33
PID 1368 wrote to memory of 1984	1368	cmd.exe	33
PID 1368 wrote to memory of 1984	1368	cmd.exe	33
PID 1368 wrote to memory of 1984	1368	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1184
- C:\Users\Admin\AppData\Local\Temp\is-8PN9N.tmp\is-L21RN.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-8PN9N.tmp\is-L21RN.tmp" /SL4 $60122 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2318152 52736
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1800
- - C:\Program Files (x86)\ffSearcher\ffsearcher64.exe
    "C:\Program Files (x86)\ffSearcher\ffsearcher64.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1936
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\pE42yi.exe
      4⤵
      Executes dropped EXE
      PID:612
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "ffsearcher64.exe" /f & erase "C:\Program Files (x86)\ffSearcher\ffsearcher64.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1368
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "ffsearcher64.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1984

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)\ffSearcher\ffsearcher64.exe

Filesize
3.7MB

MD5
2b2ce3411d7f5a3002b1b469db74b67d

SHA1
46cc7ce29a65fc655088ba6e21698e501a8335b1

SHA256
df15a5996d51b68b02a6a1e417b0555a7f1df6bb7982b250d0e30dc85c611de1

SHA512
2c78594449913bedaeeb7c8d64ed8dad3c3c2dc8665a5565ddd7e16f57328e84ad73ef250ec64f6df0d5f9c353e32b4d332499cde45dec5c4cc74f577f339902

Download Submit
C:\Program Files (x86)\ffSearcher\ffsearcher64.exe

Filesize
3.7MB

MD5
2b2ce3411d7f5a3002b1b469db74b67d

SHA1
46cc7ce29a65fc655088ba6e21698e501a8335b1

SHA256
df15a5996d51b68b02a6a1e417b0555a7f1df6bb7982b250d0e30dc85c611de1

SHA512
2c78594449913bedaeeb7c8d64ed8dad3c3c2dc8665a5565ddd7e16f57328e84ad73ef250ec64f6df0d5f9c353e32b4d332499cde45dec5c4cc74f577f339902

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-8PN9N.tmp\is-L21RN.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-8PN9N.tmp\is-L21RN.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\pE42yi.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Program Files (x86)\ffSearcher\ffsearcher64.exe

Filesize
3.7MB

MD5
2b2ce3411d7f5a3002b1b469db74b67d

SHA1
46cc7ce29a65fc655088ba6e21698e501a8335b1

SHA256
df15a5996d51b68b02a6a1e417b0555a7f1df6bb7982b250d0e30dc85c611de1

SHA512
2c78594449913bedaeeb7c8d64ed8dad3c3c2dc8665a5565ddd7e16f57328e84ad73ef250ec64f6df0d5f9c353e32b4d332499cde45dec5c4cc74f577f339902

Download Submit
\Users\Admin\AppData\Local\Temp\is-8PN9N.tmp\is-L21RN.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
\Users\Admin\AppData\Local\Temp\is-JBM4F.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-JBM4F.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-JBM4F.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}\pE42yi.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1184-55-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1184-54-0x0000000074BB1000-0x0000000074BB3000-memory.dmp

Filesize
8KB

Download
memory/1184-86-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1184-65-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1800-70-0x0000000003220000-0x00000000043DE000-memory.dmp

Filesize
17.7MB

Download
memory/1800-74-0x0000000003220000-0x00000000043DE000-memory.dmp

Filesize
17.7MB

Download
memory/1936-71-0x0000000000400000-0x00000000015BE000-memory.dmp

Filesize
17.7MB

Download
memory/1936-78-0x0000000000400000-0x00000000015BE000-memory.dmp

Filesize
17.7MB

Download
memory/1936-79-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1936-73-0x0000000000400000-0x00000000015BE000-memory.dmp

Filesize
17.7MB

Download
memory/1936-85-0x0000000000400000-0x00000000015BE000-memory.dmp

Filesize
17.7MB

Download
memory/1936-72-0x0000000000400000-0x00000000015BE000-memory.dmp

Filesize
17.7MB

Download