nymaim | 813a94d5b7fb26722f6fceaefa7b5c910193a497d809ca36beb3242fcd932d91

General

Target

813a94d5b7fb26722f6fceaefa7b5c910193a497d809ca36beb3242fcd932d91.exe
Size

2.9MB
MD5

2e4102f430a43d7625ff2709767f5ee2
SHA1

0cbc3374076a91287f45f0a88d65746227cd349e
SHA256

813a94d5b7fb26722f6fceaefa7b5c910193a497d809ca36beb3242fcd932d91
SHA512

2fefb63ece9e4587bcb4eae32c1fbe1c205a916fee1521d7f71c714bdab7dccb2d31f55684e2692409a0072921834827696a0a3f005e5cb22924178e8fd88624
SSDEEP

49152:Z2O86UG+bb4jXkZs1xq3OebBKuK5qHjKRm0YJdGOm+privDjB5sGugHh9+A5hq:MO8vGI4jK3OeP0q2mzdGMrivPBGGlHhC

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

C2

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
5036	is-EORC0.tmp
1984	frsearcher70.exe
1052	lm66yLJ8o.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	frsearcher70.exe

Loads dropped DLL 1 IoCs

pid	Process
5036	is-EORC0.tmp

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)\frSearcher\is-NOD3N.tmp	is-EORC0.tmp
File created	C:\Program Files (x86)\frSearcher\is-H6KBD.tmp	is-EORC0.tmp
File created	C:\Program Files (x86)\frSearcher\is-ITNQM.tmp	is-EORC0.tmp
File opened for modification	C:\Program Files (x86)\frSearcher\unins000.dat	is-EORC0.tmp
File created	C:\Program Files (x86)\frSearcher\is-OKGBI.tmp	is-EORC0.tmp
File created	C:\Program Files (x86)\frSearcher\is-0LR8U.tmp	is-EORC0.tmp
File created	C:\Program Files (x86)\frSearcher\is-2D8VK.tmp	is-EORC0.tmp
File created	C:\Program Files (x86)\frSearcher\is-BLK5C.tmp	is-EORC0.tmp
File created	C:\Program Files (x86)\frSearcher\is-RRL7C.tmp	is-EORC0.tmp
File created	C:\Program Files (x86)\frSearcher\is-BTECP.tmp	is-EORC0.tmp
File opened for modification	C:\Program Files (x86)\frSearcher\frsearcher70.exe	is-EORC0.tmp
File created	C:\Program Files (x86)\frSearcher\unins000.dat	is-EORC0.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
2120	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1984	frsearcher70.exe
1984	frsearcher70.exe
1984	frsearcher70.exe
1984	frsearcher70.exe
1984	frsearcher70.exe
1984	frsearcher70.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1984	frsearcher70.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2120	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 5108 wrote to memory of 5036	5108	813a94d5b7fb26722f6fceaefa7b5c910193a497d809ca36beb3242fcd932d91.exe	81
PID 5108 wrote to memory of 5036	5108	813a94d5b7fb26722f6fceaefa7b5c910193a497d809ca36beb3242fcd932d91.exe	81
PID 5108 wrote to memory of 5036	5108	813a94d5b7fb26722f6fceaefa7b5c910193a497d809ca36beb3242fcd932d91.exe	81
PID 5036 wrote to memory of 1984	5036	is-EORC0.tmp	82
PID 5036 wrote to memory of 1984	5036	is-EORC0.tmp	82
PID 5036 wrote to memory of 1984	5036	is-EORC0.tmp	82
PID 1984 wrote to memory of 1052	1984	frsearcher70.exe	83
PID 1984 wrote to memory of 1052	1984	frsearcher70.exe	83
PID 1984 wrote to memory of 1052	1984	frsearcher70.exe	83
PID 1984 wrote to memory of 4828	1984	frsearcher70.exe	85
PID 1984 wrote to memory of 4828	1984	frsearcher70.exe	85
PID 1984 wrote to memory of 4828	1984	frsearcher70.exe	85
PID 4828 wrote to memory of 2120	4828	cmd.exe	87
PID 4828 wrote to memory of 2120	4828	cmd.exe	87
PID 4828 wrote to memory of 2120	4828	cmd.exe	87

C:\Users\Admin\AppData\Local\Temp\813a94d5b7fb26722f6fceaefa7b5c910193a497d809ca36beb3242fcd932d91.exe
"C:\Users\Admin\AppData\Local\Temp\813a94d5b7fb26722f6fceaefa7b5c910193a497d809ca36beb3242fcd932d91.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5108
- C:\Users\Admin\AppData\Local\Temp\is-44OFF.tmp\is-EORC0.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-44OFF.tmp\is-EORC0.tmp" /SL4 $701C4 "C:\Users\Admin\AppData\Local\Temp\813a94d5b7fb26722f6fceaefa7b5c910193a497d809ca36beb3242fcd932d91.exe" 2767061 52736
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:5036
- - C:\Program Files (x86)\frSearcher\frsearcher70.exe
    "C:\Program Files (x86)\frSearcher\frsearcher70.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of WriteProcessMemory
    PID:1984
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\lm66yLJ8o.exe
      4⤵
      Executes dropped EXE
      PID:1052
  - - 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:4828
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "frsearcher70.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2120

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

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
5acb36565dcc002d6330ccf641fc8b6f

SHA1
72110f3fcf5a26af9a379218ea326177393dd7ba

SHA256
f99fe4a00295023672eb9209834006e4dc1ae6ee5609e4d99317978f69b1883e

SHA512
22d427bd935dfc526fcd0f3e425bbc168d97920c729f910514a28e5e870a953f932b9bd9e431854dba92897dd6c8743aefc532c97ff4b4cba1170e39a0ffe3a2

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

Filesize
4.3MB

MD5
5acb36565dcc002d6330ccf641fc8b6f

SHA1
72110f3fcf5a26af9a379218ea326177393dd7ba

SHA256
f99fe4a00295023672eb9209834006e4dc1ae6ee5609e4d99317978f69b1883e

SHA512
22d427bd935dfc526fcd0f3e425bbc168d97920c729f910514a28e5e870a953f932b9bd9e431854dba92897dd6c8743aefc532c97ff4b4cba1170e39a0ffe3a2

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-44OFF.tmp\is-EORC0.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-44OFF.tmp\is-EORC0.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-A5592.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\lm66yLJ8o.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\lm66yLJ8o.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1052-145-0x0000000000000000-mapping.dmp

Download
memory/1984-148-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1984-142-0x0000000000400000-0x000000000164D000-memory.dmp

Filesize
18.3MB

Download
memory/1984-143-0x0000000000400000-0x000000000164D000-memory.dmp

Filesize
18.3MB

Download
memory/1984-144-0x0000000000400000-0x000000000164D000-memory.dmp

Filesize
18.3MB

Download
memory/1984-139-0x0000000000000000-mapping.dmp

Download
memory/1984-152-0x0000000000400000-0x000000000164D000-memory.dmp

Filesize
18.3MB

Download
memory/1984-155-0x0000000000400000-0x000000000164D000-memory.dmp

Filesize
18.3MB

Download
memory/2120-154-0x0000000000000000-mapping.dmp

Download
memory/4828-153-0x0000000000000000-mapping.dmp

Download
memory/5036-134-0x0000000000000000-mapping.dmp

Download
memory/5108-138-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/5108-132-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/5108-156-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

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