nymaim | 5855dc56591a013143942142b5909bd3f6deacb62b320189f93c634149a73a5a

Analysis

max time kernel
57s
max time network
58s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
03/01/2023, 05:25

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General

Target

5855dc56591a013143942142b5909bd3f6deacb62b320189f93c634149a73a5a.exe
Size

2.9MB
MD5

5a898c39782e77a8c4a78cd2d9f14927
SHA1

552843fb47710254d952cf5c9e52b989c6da52c9
SHA256

5855dc56591a013143942142b5909bd3f6deacb62b320189f93c634149a73a5a
SHA512

1f5bbcd2621103e2c12ca11c271ae7eeab7e0cd7ad19b6169260db0fac82ec76a32239b442c49e9a4663a79760314449333380c03cd2f8db131bc8a08aa9b060
SSDEEP

49152:Z2R6IWFKJ/4C+L30c7MKiOedD/frU0igP0U6wJ4bYkcvOd7dBOr+tce4A5hq:MR6bFk/4b0c7MKED/ugP06J4bYdSjhDq

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
2008	is-DF64U.tmp
564	frsearcher70.exe
1632	FtJMh.exe

Loads dropped DLL 6 IoCs

pid	Process
1744	5855dc56591a013143942142b5909bd3f6deacb62b320189f93c634149a73a5a.exe
2008	is-DF64U.tmp
2008	is-DF64U.tmp
2008	is-DF64U.tmp
2008	is-DF64U.tmp
564	frsearcher70.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)\frSearcher\frsearcher70.exe	is-DF64U.tmp
File created	C:\Program Files (x86)\frSearcher\is-PK0T1.tmp	is-DF64U.tmp
File created	C:\Program Files (x86)\frSearcher\is-OL95O.tmp	is-DF64U.tmp
File created	C:\Program Files (x86)\frSearcher\is-S2J27.tmp	is-DF64U.tmp
File created	C:\Program Files (x86)\frSearcher\is-JRDEO.tmp	is-DF64U.tmp
File opened for modification	C:\Program Files (x86)\frSearcher\unins000.dat	is-DF64U.tmp
File created	C:\Program Files (x86)\frSearcher\is-8HH6T.tmp	is-DF64U.tmp
File created	C:\Program Files (x86)\frSearcher\unins000.dat	is-DF64U.tmp
File created	C:\Program Files (x86)\frSearcher\is-VI7K0.tmp	is-DF64U.tmp
File created	C:\Program Files (x86)\frSearcher\is-JA4AF.tmp	is-DF64U.tmp
File created	C:\Program Files (x86)\frSearcher\is-UBP54.tmp	is-DF64U.tmp
File created	C:\Program Files (x86)\frSearcher\is-ND64O.tmp	is-DF64U.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
1560	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
564	frsearcher70.exe
564	frsearcher70.exe
564	frsearcher70.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1560	taskkill.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1744 wrote to memory of 2008	1744	5855dc56591a013143942142b5909bd3f6deacb62b320189f93c634149a73a5a.exe	28
PID 1744 wrote to memory of 2008	1744	5855dc56591a013143942142b5909bd3f6deacb62b320189f93c634149a73a5a.exe	28
PID 1744 wrote to memory of 2008	1744	5855dc56591a013143942142b5909bd3f6deacb62b320189f93c634149a73a5a.exe	28
PID 1744 wrote to memory of 2008	1744	5855dc56591a013143942142b5909bd3f6deacb62b320189f93c634149a73a5a.exe	28
PID 1744 wrote to memory of 2008	1744	5855dc56591a013143942142b5909bd3f6deacb62b320189f93c634149a73a5a.exe	28
PID 1744 wrote to memory of 2008	1744	5855dc56591a013143942142b5909bd3f6deacb62b320189f93c634149a73a5a.exe	28
PID 1744 wrote to memory of 2008	1744	5855dc56591a013143942142b5909bd3f6deacb62b320189f93c634149a73a5a.exe	28
PID 2008 wrote to memory of 564	2008	is-DF64U.tmp	29
PID 2008 wrote to memory of 564	2008	is-DF64U.tmp	29
PID 2008 wrote to memory of 564	2008	is-DF64U.tmp	29
PID 2008 wrote to memory of 564	2008	is-DF64U.tmp	29
PID 564 wrote to memory of 1632	564	frsearcher70.exe	32
PID 564 wrote to memory of 1632	564	frsearcher70.exe	32
PID 564 wrote to memory of 1632	564	frsearcher70.exe	32
PID 564 wrote to memory of 1632	564	frsearcher70.exe	32
PID 564 wrote to memory of 1280	564	frsearcher70.exe	33
PID 564 wrote to memory of 1280	564	frsearcher70.exe	33
PID 564 wrote to memory of 1280	564	frsearcher70.exe	33
PID 564 wrote to memory of 1280	564	frsearcher70.exe	33
PID 1280 wrote to memory of 1560	1280	cmd.exe	35
PID 1280 wrote to memory of 1560	1280	cmd.exe	35
PID 1280 wrote to memory of 1560	1280	cmd.exe	35
PID 1280 wrote to memory of 1560	1280	cmd.exe	35

C:\Users\Admin\AppData\Local\Temp\5855dc56591a013143942142b5909bd3f6deacb62b320189f93c634149a73a5a.exe
"C:\Users\Admin\AppData\Local\Temp\5855dc56591a013143942142b5909bd3f6deacb62b320189f93c634149a73a5a.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1744
- C:\Users\Admin\AppData\Local\Temp\is-SKC0G.tmp\is-DF64U.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-SKC0G.tmp\is-DF64U.tmp" /SL4 $70124 "C:\Users\Admin\AppData\Local\Temp\5855dc56591a013143942142b5909bd3f6deacb62b320189f93c634149a73a5a.exe" 2772294 52736
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:2008
- - C:\Program Files (x86)\frSearcher\frsearcher70.exe
    "C:\Program Files (x86)\frSearcher\frsearcher70.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:564
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\FtJMh.exe
      4⤵
      Executes dropped EXE
      PID:1632
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "frsearcher70.exe" /f & erase "C:\Program Files (x86)\frSearcher\frsearcher70.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1280
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "frsearcher70.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1560

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)\frSearcher\frsearcher70.exe

Filesize
4.3MB

MD5
9b826d458bccf89db4f6c675ea1b9522

SHA1
83be7e35c50b54b103f2e8607fbdb8ef5a5d5a16

SHA256
f10ae7ebb3fce1f1da992d1bbd23c5a74c84c24eeca9b367b19a0f0735abc88c

SHA512
c05ad35ad47b51663fab2c1e2ac0e31389cb525a8cf51f0309687ac3b41aeded999e40f2d79e9ca18cfdfff5bf0084fb569eda192d239f35a43d15ee03cd8ede

Download Submit
C:\Program Files (x86)\frSearcher\frsearcher70.exe

Filesize
4.3MB

MD5
9b826d458bccf89db4f6c675ea1b9522

SHA1
83be7e35c50b54b103f2e8607fbdb8ef5a5d5a16

SHA256
f10ae7ebb3fce1f1da992d1bbd23c5a74c84c24eeca9b367b19a0f0735abc88c

SHA512
c05ad35ad47b51663fab2c1e2ac0e31389cb525a8cf51f0309687ac3b41aeded999e40f2d79e9ca18cfdfff5bf0084fb569eda192d239f35a43d15ee03cd8ede

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-SKC0G.tmp\is-DF64U.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-SKC0G.tmp\is-DF64U.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

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

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Program Files (x86)\frSearcher\frsearcher70.exe

Filesize
4.3MB

MD5
9b826d458bccf89db4f6c675ea1b9522

SHA1
83be7e35c50b54b103f2e8607fbdb8ef5a5d5a16

SHA256
f10ae7ebb3fce1f1da992d1bbd23c5a74c84c24eeca9b367b19a0f0735abc88c

SHA512
c05ad35ad47b51663fab2c1e2ac0e31389cb525a8cf51f0309687ac3b41aeded999e40f2d79e9ca18cfdfff5bf0084fb569eda192d239f35a43d15ee03cd8ede

Download Submit
\Users\Admin\AppData\Local\Temp\is-SKC0G.tmp\is-DF64U.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
\Users\Admin\AppData\Local\Temp\is-SM9OI.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-SM9OI.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-SM9OI.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}\FtJMh.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/564-71-0x0000000000400000-0x0000000001649000-memory.dmp

Filesize
18.3MB

Download
memory/564-78-0x0000000000400000-0x0000000001649000-memory.dmp

Filesize
18.3MB

Download
memory/564-86-0x0000000000400000-0x0000000001649000-memory.dmp

Filesize
18.3MB

Download
memory/564-72-0x0000000000400000-0x0000000001649000-memory.dmp

Filesize
18.3MB

Download
memory/564-73-0x0000000000400000-0x0000000001649000-memory.dmp

Filesize
18.3MB

Download
memory/564-83-0x0000000000400000-0x0000000001649000-memory.dmp

Filesize
18.3MB

Download
memory/564-79-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1744-67-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1744-54-0x0000000075631000-0x0000000075633000-memory.dmp

Filesize
8KB

Download
memory/1744-87-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1744-55-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2008-74-0x0000000003220000-0x0000000004469000-memory.dmp

Filesize
18.3MB

Download
memory/2008-69-0x0000000003220000-0x0000000004469000-memory.dmp

Filesize
18.3MB

Download